Menene Samuwar Dendrite? {0} Polinovel

Samuwar Dendrite yana bayyana haɓakar bishiya{0}kamar sifofin crystalline waɗanda ke tasowa yayin tafiyar da sinadarai na lantarki a cikin batura da sauran tsarin. Wannan allura{2}}arafa masu siffa ko reshe suna samuwa lokacin da ions suka taru ba dai-dai ba a saman filayen lantarki a lokacin caji da zagayawa.

Lamarin yana faruwa a cikin sinadarai na baturi daban-daban amma yana haifar da ƙalubale musamman a cikibatirin lithium, inda dendrites na iya huda ta hanyar masu rarrabawa kuma su jawo gajerun da'irori na ciki. Fahimtar dalilin da ya sa da yadda waɗannan sifofin ke tasowa ya zama mahimmanci yayin da tsarin ajiyar makamashi ke matsawa zuwa mafi girma da ƙimar caji.

Dendrites suna samuwa ta hanyar tsarin electrodeposition wanda ke gudana ta hanyar abubuwan thermodynamic da motsin motsi. Lokacin da baturi yayi caji, ions karfe suna motsawa ta cikin lantarki zuwa anode. A ƙarƙashin kyakkyawan yanayi, waɗannan ions za su yi ajiya iri ɗaya a saman saman lantarki. Duk da haka, abubuwa da yawa suna kawo cikas ga wannan haɗin gwiwa.

Rashin bin ka'ida na saman yana haifar da mahallin filin lantarki na gida. Waɗannan filayen da aka haɓaka suna jawo ƙarin ions zuwa takamaiman wurare maimakon yada su daidai. Da zarar ɗan fiffitowa ya fito, sai ya zama kansa{2}} yana ƙarawa{3}}ƙarshen tsarin haɓaka yana samun ƙarfin filayen lantarki fiye da filaye masu lebur, yana ƙara haɓaka haɓakar wannan hanyar.

Tsarin yana ƙaruwa a mafi girma na yanzu. Bincike daga Jami'ar Maryland ta amfani da sel masu gani na zahiri ya nuna cewa a yawan abubuwan da ke sama da 87 mA/cm² a halin yanzu, ilimin halittar dendrite ya ƙaura daga sifofin mossy zuwa ga allura mai kaifi -kamar sifofi. Lokaci zuwa gajeriyar da'ira na ciki ya ragu daidai gwargwado tare da haɓaka yawan yanzu, yana faduwa daga sa'o'i da yawa a 10 mA/cm² zuwa kusan mintuna 30 a 110 mA/cm².

Zazzabi yana taka rawar dual a cikin samuwar dendrite. Ƙananan yanayin zafi yana jinkirin yaduwar ion, ƙirƙirar gradients kusa da saman lantarki. Wannan yana sauƙaƙawa ga ions don ajiya a wuraren da ake da su maimakon gano sabbin wuraren lalata. Akasin haka, madaidaicin tsaka-tsakin tsaka-tsakin electrolyte (SEI) da aka ƙera a ƙananan yanayin zafi yana ƙara yin tsayin daka kuma ba shi da kwanciyar hankali, yana ba da gudummawa ga ƙirar ƙira.

Dendrite Formation

Batura lithium suna fuskantar ƙalubale na musamman na dendrite saboda ƙarfin ƙarar lithium da ƙarancin ƙarfin lantarki. Lokacin da farantin lithium ions a kan anode yayin caji, yakamata su shiga tsakani a cikin tsarin graphite. Madadin haka, ions da suka wuce gona da iri waɗanda ba za a iya ɗaukar su da sauri suna taruwa a saman ƙasa kamar lithium na ƙarfe.

Layer SEI yana tasiri sosai ga wannan tsari. Wannan fim mai kariya yana samuwa ta halitta lokacin da electrolyte ya amsa tare da lithium anode. Uniform, mai yawa SEI yana jagora har ma da saka lithium. Duk da haka, SEI ta ci gaba da karyewa da yin gyare-gyare yayin caji{3}} zagayowar zagayowar saboda canjin girma a cikin lantarki. Kowane wurin karaya ya zama mai yuwuwar rukunin nucleation na dendrite.

Bincike da aka buga a Nature Materials a cikin 2024 ya gano hanyoyi guda biyu daban-daban don samuwar dendrite a cikin ƙwararrun batir lithium na jiha ta amfani da Li₇La₃Zr₂O₁₂ (LLZO) electrolytes. Na'urar farko ta ƙunshi nau'ikan nau'ikan lithium plating ba{3} Na biyu yana faruwa ta hanyar rage Li⁺ na gida a iyakokin hatsi a cikin ingantacciyar wutar lantarki da kanta. Tsakanin waɗannan matakai guda biyu, masu bincike sun lura da tsaka-tsakin lokaci inda ci gaban dendrite ya tsaya kafin ya ci gaba.

Tsarin farawa ya bambanta da yaduwa. Bincike daga Jami'ar Oxford ya nuna cewa ƙaddamar da dendrite a cikin batura masu ƙarfi{1} na jihohi yana farawa lokacin da lithium ya shiga cikin ramukan ƙasa ta hanyar haɗa microcracks. Yayin da waɗannan pores ɗin suka cika, ci gaba da caji yana gina matsa lamba saboda jinkirin fitar da lithium zuwa saman. Wannan matsin lamba a ƙarshe yana haifar da tsagewa. Da zarar tsaga ya yi, yaduwa yana faruwa ta hanyar buɗewa{5} tare da lithium yana fitar da tsagewar daga baya maimakon daga tudu.

Matsakaicin yawa na yanzu sun bambanta ta nau'in electrolyte. Matsakaicin masu amfani da ruwa na ruwa yawanci suna nuna samuwar dendrite sama da 0.2-2.0 mA/cm², yayin da ƙwararrun masu lantarki za su iya jure maɗaukakin maɗaukaki na yanzu kafin gazawa. Bincike a Jami'ar Oxford ya gano cewa densifying argyrodite (Li₆PS₅Cl) m electrolyte daga 83% zuwa 99% dangi density ya karu m halin yanzu yawa daga kasa 2 mA/cm² zuwa 9 mA/cm² ba tare da dendrite samuwar.

Dendrites suna daidaita batura ta hanyoyin gazawa da yawa. Mafi yawan bala'i yana faruwa ne lokacin da dendrite ya girma gaba daya ta hanyar mai rarrabawa, yana haifar da gada mai gudanarwa tsakanin anode da cathode. Wannan gajeriyar da'irar ta ciki tana haifar da dumama cikin gida, mai yuwuwar haifar da guduwar zafin zafi{2}}wani kai{3}}ara saurin amsawa wanda zai iya haifar da gobara ko fashe.

Kafin kai ga gazawar bala'i, dendrites suna ƙasƙantar da aiki da ƙari. Kowane dendrite yana fallasa sabon saman lithium mai amsawa ga electrolyte. Wannan yana tafiyar da ci gaba da samuwar SEI, yana cinye duka lithium mai aiki da kuma electrolyte. Fiye da zagayowar da suka biyo baya, wannan matakin na parasitic yana rage iya aiki kuma yana ƙara juriya na ciki.

Dendrites kuma suna ƙirƙira "matattu lithium" -waɗanda keɓaɓɓen ma'ajin ƙarfe na lantarki waɗanda ba sa shiga cikin halayen lantarki. Lokacin da dendrites ya karye saboda damuwa na inji ko lalata electrolyte, sun bar baya da waɗannan guntu marasa aiki. Mataccen lithium yana wakiltar asarar iya aiki na dindindin, saboda ba za a iya dawo da shi ta hanyar hawan keke na yau da kullun ba.

Canje-canjen ƙarar da ke hade da lithium plating da tsiri yana ƙara tsananta waɗannan matsalolin. Karfe lithium yana jure da gaske 100% canjin girma tsakanin jahohin ƙarfe da ionic. Wannan haɓakawa da ƙaddamarwa yana ƙarfafa sashin SEI kuma zai iya lalata mai rarrabawa ta jiki, ƙirƙirar ƙarin hanyoyi don shigar da dendrite.

Matsakaicin iya yin faɗuwa a cikin ƙwayoyin ƙarfe na lithium mara kariya zai iya kaiwa 1{2}}2% a kowane zagaye lokacin da dendrites suka yi ƙarfi. Wannan ya bambanta sosai da ƙwayoyin lithium-ion da aka kirkira da kyau ta amfani da graphite anodes, waɗanda yawanci suna rasa ƙarfin 0.1% a kowane zagaye ko ƙasa da haka.

Yawan yawa na yanzu yana fitowa azaman babban abin da ke sarrafa ƙimar samuwar dendrite. Maɗaukakin igiyoyin caji suna tilasta ƙarin ions don sakawa cikin ƙasan lokaci, yana mamaye ikon lantarki don ɗaukar su daidai. Dangantakar ba ta layi ba ce -da alama akwai madaidaicin madaidaici a ƙasa wanda ci gaban dendrite ya kasance kaɗan, amma sama wanda yake ƙaruwa sosai.

Haɗin Electrolyte yana tasiri sosai ga raunin dendrite. Matsakaicin gishiri yana rinjayar ƙimar jigilar ion da daidaiton filin lantarki kusa da lantarki. Ƙananan ƙarancin gishiri yana haifar da raguwar yankuna inda wadatar ion ba zai iya biyan buƙatun ajiya ba, yana haɓaka haɓakar dendritic. Babban taro na iya inganta daidaituwa amma yana iya rage haɓakar ionic ko ƙara danko.

Abubuwan ƙari na Electrolyte suna ba da hanya ɗaya don murkushewa. Fluoroethylene carbonate (FEC), alal misali, yana gwammace yana ragewa a saman lithium don samar da LiF{1}} arziƙin SEI. Waɗannan yadudduka suna nuna ƙarfin injina mafi girma da ƙananan ƙarancin wutar lantarki idan aka kwatanta da daidaitattun abubuwan haɗin SEI, suna taimakawa kula da tsarin ajiya iri ɗaya.

Lalacewar saman ƙasa da ƙanƙara sun fara da yawa dendrites. Ko da rashin bin ka'ida na nanoscale suna tattara filayen lantarki isasshe don haifar da jigo na fifiko. Ayyukan masana'antu waɗanda ke samar da filaye masu sulɓi na lantarki daidai da rage wuraren lalata dendrite. Hakazalika, ƙazanta ko ɓangarorin da ke cikin filayen lantarki na iya zama maƙasudin nukleya iri-iri.

Zazzabi gradients a cikin tantanin halitta suna haifar da bambance-bambancen halayen motsin rai. Wurare masu zafi suna samun saurin jigilar ion da ajiyewa, mai yuwuwar ƙirƙirar dendrite na gida{1}} yankuna masu rauni ko da a lokacin da yawan yawan yanzu ya kasance matsakaici. Tsarin sarrafa baturi waɗanda ke tabbatar da rarraba yanayin zafi iri ɗaya suna taimakawa rage wannan tasirin.

Yanayin caji lokacin da baturi ya huta shima yana rinjayar girman dendrite. Riƙe ƙwayoyin sel a babban ƙarfin lantarki na tsawon lokaci yana haɓaka samuwar dendrite, musamman a cikin sel baƙin ƙarfe na lithium (LiFePO₄). Wannan yana bayyana dalilin da yasa dabarun cajin ruwa ya samo asali zuwa ƙananan matakan wutar lantarki idan aka kwatanta da ayyuka daga shekaru goma da suka gabata.

Gano dendrite na al'ada yana dogara ne akan bayan{0}} bincike na gawarwaki{1}}bude sel marasa nasara da kuma bincika filayen lantarki tare da duban abin gani na lantarki. Duk da yake mai ba da labari, wannan hanyar ba zata iya hana gazawa ba ko bin diddigin juyin halittar dendrite a ainihin lokacin.

Na'urori masu tasowa yanzu suna ba da damar kallon operando. Masu bincike a cibiyoyi da yawa sun ɓullo da hanyoyi ta amfani da m electrolytes ko na musamman cell zane. Jami'ar Maryland ta ƙirƙira sel masu gani inda duka wayoyin lantarki suka ƙunshi ƙarfe na lithium, suna ba da damar hangen nesa kai tsaye na haɓakar dendrite ta taga bayyananne yayin caji.

X{0}ray computed tomography (XCT) yana ba da hoto mai girma uku{1} na tsarin dendrite a cikin sel marasa inganci. Synchrotron X{3} ray yana ba da isasshen ƙuduri don bin diddigin samuwar dendrite a microscale yayin ainihin aikin baturi. Ayyukan da aka buga a cikin Nature na baya-bayan nan sun yi amfani da operando XCT don lura da yadda lithium ke kutsawa yumbu electrolytes, yana bayyana tsattsauran ra'ayi da jerin yada lithium.

Electrochemical impedance spectroscopy (EIS) yana ba da hanyar gano kai tsaye amma mara lalata. Yayin da dendrites ke girma, suna canza tasiri mai tasiri da juriya na lantarki. Waɗannan canje-canjen suna bayyana azaman motsi a cikin bakan impedance. Masu bincike sun daidaita dabarun duban ɗigon kwayar halitta don taswirar juyin halitta ta hanyar ma'aunin EIS, suna ba da gargaɗin farko game da samuwar dendrite ba tare da buɗe tantanin halitta ba.

Nukiliya rawanin maganadisu (NMR) spectroscopy da hoto suna ba da takamaiman sinadarai. Tracer - musanya NMR na iya bambanta tsakanin lithium plating a musaya tare da raguwa a cikin mafi girman electrolyte. Hoto na Magnetic Resonance Hoto (MRI) yana bin diddigin rarraba sararin samaniya da ƙimar girma, yana taimaka wa masu bincike su fahimci yadda yankuna daban-daban na tantanin halitta ke haɓaka dendrites a lokuta daban-daban.

Fiber optic na'urori masu auna firikwensin suna wakiltar hanya mai tasowa. Fiber Bragg grating (TFBG) firikwensin firikwensin da aka saka a kusa da filayen lantarki suna gano sauye-sauyen jigilar jama'a da haɓakar dendrite a musaya na nanoscale ba tare da damun aikin baturi ba. Matsakaicin ra'ayin gani na gani yana ba da damar saka idanu na gaske na lokaci na lithium kinetics da haɓakar dendrite.

Dendrite Formation

Hanyoyi da yawa suna yin niyya don murkushe dendrite, galibi suna aiki tare idan an haɗa su. Har yanzu babu wata hanya ɗaya da ta kawar da dendrites gaba ɗaya a ƙarƙashin duk yanayin aiki, amma dabaru da yawa suna haɓaka mahimmin ƙimar ƙimar halin yanzu.

M electrolytes da farko sun yi kama da alƙawarin a matsayin shingen jiki a kan dendrites. Duk da haka, bincike ya nuna cewa dendrites suma suna shiga cikin ƙaƙƙarfan kayan aiki, suna girma ta iyakokin hatsi ko fasa. Amfanin daskararrun electrolytes ba ya ta'allaka ne a cikin cikakken rigakafi amma a cikin buƙatar ƙarin damuwa na inji kafin shigar dendrite ya faru. Haɓaka ƙaƙƙarfan ɗigon electrolyte da tsarin hatsi na iya ƙara ƙarfin juriyar shigarsa.

Uku -tsararrun gine-ginen lantarki suna canza rarrabuwar girma na yanzu. Maimakon ajiyewa akan shimfida mai lebur, lithium yana cika madaidaicin tsari na kayan masaukin 3D. Wannan yana ƙara ingantaccen yanki mai inganci daga kusan 5.2 × 10⁻³ m²/g don foil lithium zuwa sama da 2.6m²/g don ɓangarorin katako na carbonized. Ƙarar yanki yana rage yawan halin yanzu na gida daidai gwargwado, yana kiyaye shi a ƙasa da maƙasudin ƙaddamarwar dendrite. Ƙara kayan lithiophilic kamar tin zuwa waɗannan sifofi yana haifar da fifikon rukunin yanar gizo waɗanda ke haɓaka yunifom, ba{9}}arfafa zurfafan dendritic.

Yaduddukan SEI na wucin gadi da aka yi amfani da su kafin hawan keke na farko na iya riga{0}}wance samuwar SEI maras saɓo na halitta. Kayayyaki daban-daban sun nuna alƙawarin, gami da LiF- riguna masu arziƙi, yadudduka na polymer, da kuma fina-finai marasa ƙarfi{4}. Madaidaicin SEI na wucin gadi ya haɗu da haɓakar haɓakar ionic, ƙarancin wutar lantarki, da ƙarfin injin da ya isa ya hana shigar dendrite yayin jujjuyawar yayin canje-canjen girma.

Injiniyan lantarki yana magance samuwar dendrite daga gefen mafita. Maɗaukakin electrolytes{1} (wani lokaci ana kiransa "solvent -a cikin{3}}gishiri" tsarin) yana rage samuwar ƙwayoyin ƙarfi kyauta, suna canza tsarin warwarewa a kusa da ions lithium. Wannan gyare-gyare na iya haɓaka ƙarin ajiya iri ɗaya. Ionic Liquid Electrolytes suna ba da ƙarancin wuta tare da kaddarorin tsaka-tsaki daban-daban waɗanda za su iya kashe dendrites, ko da yake babban ɗanƙon su yana haifar da ƙalubale.

Kwanan nan ka'idojin cajin da aka ɗora sun fito a matsayin sa baki mai ban mamaki. Maimakon yin amfani da halin yanzu na yau da kullun, ƙa'idodin pulsed suna musanya tsakanin lokutan caji da lokutan hutu. A lokacin hutawa, gradients na hankali suna hutawa kuma tukwici dendrite na iya narkar da wani ɗan lokaci zuwa cikin bayani. Bincike ya nuna cewa MHz - mitar igiyoyin igiyoyin ruwa sun ƙaru mahimmin ƙimar halin yanzu da ninki shida{4}} daga kusan 1 mA/cm² zuwa 6.5 mA/cm²-a cikin ƙwararrun batir na jiha.

Aikace-aikacen matsa lamba yana ba da wata hanya ta inji. Aiwatar da ƙarfi mai daidaitawa zuwa jirgin sama na lantarki yana takurawa hanyar girma dendrite. Masu bincike na MIT sun nuna cewa za su iya sarrafa ci gaban dendrite ta hanyar amfani da sakewa da matsa lamba, haifar da dendrites zuwa zigzag a cikin daidaitawa tare da jagorancin karfi. Yayin da matsin lamba baya kawar da samuwar dendrite, yana hana su tsallaka tsakanin na'urorin lantarki.

Canje-canje zuwa ƙwaƙƙwaran batir{0}jihar an ɗan motsa shi ta hanyar bege na warware matsalar dendrite. Tsammanin farko da aka yi zaton tsayayyen yumbu electrolytes zai toshe shigar dendrite a zahiri. Gaskiya ta tabbatar da rikitarwa.

M electrolytes sun kasa ta hanyar karaya na inji maimakon ƙyale dendrites su tura ta kawai. Tsarin yana farawa da lahani{1}}wuta, iyakoki na hatsi, ko rashin daidaituwa na saman. Lithium yana shiga cikin waɗannan lahani, kuma yayin da ƙarin lithium ke taruwa, damuwa na inji yana haɓaka har sai yumbu ya fashe. Da zarar fashewa ta fara, lithium yana yaduwa ta cikinsa ta hanyar buɗaɗɗen hanyar buɗewa wanda masu binciken Oxford suka gano.

Daban-daban daskararrun kayan lantarki daban-daban suna nuna juriya dabam-dabam ga dendrite{0}}karaya mai jawo. Garnet - nau'in electrolytes kamar LLZO suna nuna alƙawari saboda ƙarfin ƙarfin ƙarfin su, amma ƙarfin lantarkin su yana ba da gudummawa ga samuwar dendrite. Ƙarƙashin wutar lantarki yana ba da damar electrons su isa tukwici na dendrite, suna ci gaba da ajiyar lithium. Rage wannan motsin lantarki, ko da yayin da ake riƙe babban ƙarfin ƙarfin ionic, yana taimakawa wajen kashe dendrites.

Sulfide{0}} tushen daskararrun electrolytes kamar Li₆PS₅Cl (argyrodite) suna nuna halaye daban-daban. Suna da taushi da inji fiye da yumbu oxide, mai yuwuwar barin dendrites suyi girma ta hanyar nakasar filastik maimakon karaya. Duk da haka, ƙwanƙwasawa yana haɓaka aiki sosai{3}}ƙarara yawan argyrodite zuwa 99% yana ba da damar dendrite{5}}aiki kyauta a yawan abubuwan da suka dace da sauri{6}}cajin motocin lantarki.

Injiniyan mu'amala tsakanin lithium ƙarfe anodes da ƙwaƙƙwaran electrolytes yana magance wani yanayin gazawa. Mummunan hulɗa yana haifar da ƙuntatawa na halin yanzu inda yawan halin yanzu na gida ya zarce matsakaicin duniya ta hanyar girma. Waɗannan wuraren ƙuntatawa sun zama wuraren ƙaddamar da dendrite. Aiwatar da masu shiga tsakani{3} fina-finan siraran polymer, gami da ƙarfe, ko kayan haɗin gwiwa{4}} na iya haɓaka lamba da rarrabawa na yanzu daidai.

Mahimmanci na halin yanzu (CCD) don samuwar dendrite a cikin ingantaccen batir{0} dole ne ya wuce 5 mA/cm² don aikace-aikacen abin hawa na lantarki. Yawancin ƙwaƙƙwaran electrolytes sun gaza ga wannan manufa a ƙarƙashin daidaitattun yanayi, don haka bincike mai zurfi cikin dabarun haɗaka ta amfani da ƙima, matsa lamba, caji, da gyare-gyaren mu'amala.

Yayin da batirin lithium ke mamaye binciken dendrite, sauran tsarin suna fuskantar kalubale iri ɗaya. Batir ɗin ƙarfe na Zinc suna fuskantar samuwar zinc dendrite, kodayake suna da halaye daban-daban. Zinc dendrites yawanci suna fitowa azaman gansakuka -kamar ko whisker tsarin maimakon kaifi allura, yana nuna nau'ikan sinadaran lantarki daban-daban na zinc.

A cikin batirin zinc mai ruwa, samuwar dendrite ya dogara da ƙarfi akan pH electrolyte da tattarawar zincate. Babban ma'auni na zincate sama da 0.4 M a cikin 7 M KOH electrolytes yana rage girman dendrite, amma masu rarraba electrolytes suna haɓaka haɓakar hydrogen. Tsayayyen tsaka-tsakin tsaka-tsakin electrolyte akan zinc ya ƙunshi mahaɗan mabambanta fiye da lithium{4} musamman zinc oxide da zinc hydroxide{5} tare da keɓaɓɓen kayan sufuri na inji da ionic.

Sodium karfe anodes nuna dendrite hali kama da lithium, ko da yake dendrites kullum girma da sannu a hankali saboda sodium ta reactivity. Karfe na Magnesium, da zarar an yi tunanin juriya ga samuwar dendrite, kwanan nan an nuna shi don samar da dendrites ƙarƙashin wasu sharuɗɗa, musamman a ɗimbin yawa na yanzu sama da 0.2-0.3 mA/cm² dangane da electrolyte.

Hatta siliki anodes a cikin batir lithium na al'ada - na iya fuskantar samuwar lithium dendrite. Lokacin caji, silicon yana faɗaɗa da kusan 300%, yana fashe layin SEI. Ta hanyar waɗannan fasa, za a iya rage ions lithium don samar da ƙarfe na lithium dendrites maimakon haɗawa da silicon kamar yadda aka yi niyya. Wannan tsarin yana wakiltar yanayin gazawar matasan haɗe da haɓaka girma tare da jigon lantarki.

Haɗin kai a cikin waɗannan tsarin yana nuna ƙa'idodin duniya ne ke tafiyar da samuwar dendrite. Yawancin yanzu, yanayin yanayin ƙasa, da kaddarorin yadudduka na tsaka-tsaki suna fitowa azaman abubuwan sarrafawa ba tare da la'akari da takamaiman sinadarai na ƙarfe ba. Dabarun rigakafin da aka haɓaka don tsarin ɗaya galibi suna canzawa, tare da gyare-gyare, zuwa wasu.

Yawancin ci gaban kwanan nan sun sake fasalin fahimtar samuwar dendrite. Gano hanyoyin farawa daban da yaɗawa a cikin ingantattun batura na jiha suna wakiltar canjin yanayi. Samfuran da suka gabata sun ɗauki tsari guda ɗaya mai ci gaba, amma sanin waɗannan a matsayin matakai daban-daban yana ba da damar shiga tsakani a kowane mataki.

Matsayin amorphous tare da tsarin dendrite crystalline ya sami kulawa. Nazarin NMR na baya-bayan nan ya nuna cewa dendrites sun fara farawa azaman sifofi na amorphous waɗanda daga baya sun yi crystallize. Lalacewar sinadarai na ƙwaƙƙwaran electrolytes da yanayin aiki na baturi suna ƙayyade ma'auni tsakanin waɗannan hanyoyin guda biyu. Wannan binciken yana buɗe yuwuwar ƙirƙira yanayi waɗanda ke fifita tsarin amorphous mai jujjuyawa akan dendrites crystalline na dindindin.

Samfuran koyan inji yanzu sun yi hasashen yanayin girma dendrite tare da haɓaka daidaito. Ta hanyar haɗa sigogin jiki da yawa{1}}yawancin halin yanzu, zafin jiki, maida hankali kan electrolyte, ilimin halittar jiki - cikin hanyoyin sadarwa na jujjuyawar jijiyoyi, masu bincike suna samun ingantattun tsinkaya fiye da tsarin kimiyyar lissafi na gargajiya- tushen kawai. Waɗannan kayan aikin suna haɓaka gano ingantattun tagogin aiki da haɗin kayan aiki.

Kwayoyin sunadaran suna fitowa a matsayin ba zato ba tsammani amma tasiri mai tasiri na dendrite. Wasu sunadaran, idan aka ƙara su zuwa electrolytes, suna shiga ta atomatik zuwa saman saman ƙarfe na lithium, musamman a tukwici dendrite. Ta hanyar sauye-sauye masu dacewa daga -helix zuwa -tsararrun zane, waɗannan sunadaran suna canza rarraba filin lantarki na gida, suna haɓaka ƙima iri ɗaya. Wannan dabarar halitta - ƙwarin guiwa ta cimma tsawon rayuwa mai tsayi da ingantaccen aiki mai ƙarfi a cikin gwaje-gwajen dakin gwaje-gwaje.

Tsarin thermodynamic don fahimtar samuwar dendrite ya girma. Masu bincike yanzu sun gane cewa duka biyun yanayin zafi da shingen makamashi na thermodynamic suna taka muhimmiyar rawa wajen tantance ko ajiyar lithium daidai yake ko kuma ya samar da dendrites. Wannan fahimtar tana jagorantar dabarun daidaita waɗannan sigogi ta hanyar ƙirar kayan aiki da yanayin aiki.

Dendrite Formation

Duk da ci gaba, tallace-tallace dendrite{0}batura masu jurewa ya kasance mai wahala. Rata tsakanin zanga-zangar dakin gwaje-gwaje da samar da taro ya haɗa da matakan ƙima yayin da ake kula da ingancin inganci. Lalaci ɗaya a cikin ƙwaƙƙwaran lantarki ko farfajiyar lantarki na iya lalata dendrites, yin daidaitattun masana'anta.

La'akarin farashi yana shafar dabarun da suka kai ga samarwa. Wasu daga cikin mafi inganci hanyoyin murkushe dendrite -kamar madaidaicin{2}}inginar 3D tsarin lantarki ko tsayin{4}}tsarki mai ƙarfi- suna haɓaka farashin masana'anta. Daidaita ayyukan ingantawa da ingantaccen tattalin arziki yana buƙatar haɓakawa mai gudana.

Dogon lokaci{0} kwanciyar keke yana buƙatar ƙarin haɓakawa. Yawancin dabarun rigakafin sun sami nasarar kashe dendrites don ɗaruruwan hawan keke, amma batirin abin hawa na lantarki dole ne ya jure dubban hawan keke sama da shekaru goma na amfani. Ƙananan ƙimar girma dendrite waɗanda suke da alama ba su da kyau a kan hawan keke 500 na iya zama matsala a kan hawan keke 3,000. Fahimta da hana hanyoyin lalata dogon lokaci{7} yana buƙatar tsawaita ka'idojin gwaji.

Yin caji mai sauri ya kasance mai ƙalubale musamman. Aikace-aikacen mota suna ƙara yin niyya na mintuna 15 ko ma lokutan caji na mintuna 5, suna buƙatar yawan adadin 10-20 mA/cm² ko sama da haka. Kadan dabarun rigakafin dendrite na yanzu suna kula da tasiri a waɗannan matsananciyar ƙimar. Samun duka caji mai sauri da tsawon rayuwa lokaci guda yana wakiltar makasudin bincike na iyaka.

Haɗin kai tare da wasu buƙatun baturi yana dagula ƙira. Dabarun da ke murkushe dendrites na iya rage yawan kuzari, ƙara rashin ƙarfi, ko daidaita ƙarancin aikin zafi.{1}. Dole ne ƙirar baturi ya inganta a cikin sau da yawa{3}}maƙasudai masu karo da juna, yana mai da rigakafin dendrite yanki ɗaya na rikitarwa.

Daidaita gwaji da bayar da rahoto zai hanzarta ci gaba. Ƙungiyoyin bincike daban-daban suna amfani da ma'anoni daban-daban na samuwar dendrite, daban-daban na sel, da ma'auni na nasara daban-daban. Ƙirƙirar ka'idoji na gama gari zai ba da damar ƙarin kwatanta sakamako kai tsaye da saurin gano hanyoyi masu ban sha'awa.

Ma'auni na samuwar Dendrite sun bambanta sosai tare da yanayin aiki. A ƙananan ƙarancin halin yanzu a kusa da 0.5 mA/cm², ƙaddamar da dendrite na farko zai iya ɗaukar daruruwan sa'o'i. A babban adadin halin yanzu wanda ya wuce 10 mA/cm², dendrites na iya haifar da gajerun da'irori a cikin mintuna. Zazzabi, abun da ke ciki na electrolyte, da yanayin saman lantarki duk suna rinjayar waɗannan lokutan lokutan. Yawancin batura masu amfani suna aiki a cikin yanayi inda samuwar dendrite, idan ya faru, yana tasowa a hankali sama da daruruwa ko ɗaruruwan zagayowar caji maimakon a cikin zagaye ɗaya.

Juya juzu'i na yiwuwa a ƙarƙashin wasu sharuɗɗa. A lokacin fitarwa ko lokacin hutu, tukwici dendrite na iya narke baya cikin electrolyte, musamman idan har yanzu ba a haɗa su da na'urar ta hanyar hanyoyin sarrafawa ba. Wannan dabi'ar warkarwa ta kai{2} tana bayyana dalilin da yasa ka'idodin cajin caji ke tabbatar da tasiri{3}}lokacin hutu yana ba da damar dendrites masu tasowa su narke. Duk da haka, da zarar dendrites sun samar da sifofi masu yawa ko kuma sun zama warewa ta hanyar lantarki kamar mataccen lithium, juyawa ya zama ba zai yiwu ba. Rigakafin ya kasance mafi inganci fiye da gyarawa.

Ba lallai ba ne. Batura lithium na al'ada{1} ion masu amfani da graphite anodes da wuya su fuskanci samuwar dendrite a ƙarƙashin yanayin aiki na yau da kullun saboda lithium yana shiga cikin graphite maimakon yin plating azaman ƙarfe. Matsalolin Dendrite da farko suna shafar ƙarfe anodes na lithium da ake amfani da su a cikin batir na gaba{3}. Ko da tare da anodes na ƙarfe na lithium, ƙirar da ta dace da aiki ƙasa da mahimmin madaidaicin madaidaicin mashigin na iya kiyaye aikin dendrite{5}} kyauta har abada. Kula da inganci da rigakafin cin zarafi fiye da rashin makawa.

Samuwar Dendrite tana wakiltar hadadden sinadaran lantarki da na inji wanda ke sarrafawa ta hanyar yawa na yanzu, zafin jiki, kaddarorin fuska, da lahani na kayan. Duk da yake an fara tunanin hanawa ta hanyar ƙwararrun electrolytes, dendrites suna samuwa ta hanyar ƙaddamarwa daban-daban da hanyoyin yaduwa waɗanda ke buƙatar shiga tsakani a kowane mataki. Dabarun da yawa - haɗe da gine-ginen lantarki na 3D, yadudduka na SEI na wucin gadi, injiniyan lantarki, da ka'idojin caji mai juzu'i{4}} suna nuna alƙawarin haɓaka mahimmin mashigin yawa na yanzu. Hanyar zuwa manyan batura masu ƙarfi na kasuwanci{6}} ya dogara ne akan haɗa waɗannan hanyoyin yayin kiyaye ƙirƙira da farashi{7}} tasiri. Ci gaba na baya-bayan nan a cikin dabarun ƙira, ƙirar ƙididdigewa, da fahimtar injina suna ci gaba da jagorantar ci gaba zuwa tsarin dendrite{9}} na'urorin batir masu juriya waɗanda ke da ikon saduwa da buƙatu na kera motoci da aikace-aikacen grid.