Dulmar guud ee Falanqaynta Fashilka iyo Farsamaynta Ciladda ee baytariga Lithium Ion

著者：Iflowpower – Fornitur Portable Power Station

Jiilka iyo korriinka filimka 1SEI wuxuu ku jiraa nidaamka batteriga lithium-ion ganacsi, iyo qaybta lumista awoodda batteriga waxay ka timid saameynta dhinaca u dhaxaysa graphite iyo electrolyte organic, iyo graphite si fudud ayaa elektirooni ahaan loogu falceliyaa lithium ion organic electrolyte, gaar ahaan Solvent waa vinyl carbonate (EC) iyo dimethyl carbonate (DMC). Marka batteriga lithium ion uu yahay inta lagu jiro dallacaadda koowaad (marxaladda), korantada taban iyo lithium ion electrolyte ayaa dhacay iyo lithium ion electrolyte ayaa dhacay iyo lakabka filimka adag ee elektrolytka (SEI) ayaa laga sameeyay dusha garaafka, taas oo keeni karta qayb ka mid ah awoodda aan la bedeli karin. Filimka SEI wuxuu hubiyaa gudbinta ions iyadoo la ilaalinayo walaxda fal-celinta, waxayna ka hortagtaa xasilloonida hawlgalka walxaha firfircoon ee batteriga walxaha firfircoon iyadoo laga hortagayo walxaha firfircoon.

Si kastaba ha ahaatee, inta lagu jiro wareegga xiga ee batteriga, tan iyo balaadhinta joogtada ah iyo foosha ee walxaha elektiroonigga ah waxay keenaan goob cusub oo firfircoon si ay u soo bandhigto, tani waxay keeni kartaa habka khasaare joogto ah, taas oo ah, awoodda batteriga ayaa si joogto ah hoos loogu dhigaa. Habkan fashilka ah waxaa loo aaneyn karaa habka dhimista korantada ee dusha sare ee korantada, taas oo lagu muujiyay kororka joogtada ah ee dhumucda filimka SEI. Sidaa darteed, daraasadda qaybaha kiimikada filimka SEI iyo qaab-dhismeedka waxay noqon kartaa mid qoto dheer, sababta awoodda batteriga lithium-ion iyo hoos u dhaca awoodda.

Habka sameynta filimka SEI Sanadihii la soo dhaafay, cilmi-baarayaashu waxay isku dayeen inay bartaan dabeecadda xuubka SEI iyada oo la baabi&39;inayo tijaabooyinka nidaamyada batteriga yaryar. Habka kala dirida batteriga waxaa lagu fuliyaa sanduuqa gaaska gaaska aan shaqaynayn (aerosolic). <5 ppm). After the battery is disassembled, it can pass a nuclear magnetic resonance technology (NMR), a flight time secondary ion mass spectrometry (TEMS), a scanning electron microscope (SEM), a transmission electron microscope (TEM), an atomic force microscope (AFM), X-ray absorption spectrum (XAF), and Infrared (FTIR) and Raman Spectroscopy and other test methods study the thickness, morphology, composition, growth process and mechanism of SEI membranes.

Inkasta oo habab badan oo tijaabo ah loo isticmaalay si loo muujiyo filimka SEI, qaabka dhabta ah ee filimka SEI wuxuu ku koraa batteriga waxaa loo isticmaalaa in lagu tilmaamo habab aad u horumarsan oo toos ah. Dhibaatadu waxay tahay in filimka SEI uu ku adag yahay walxo kala duwan sida organic iyo inorganic, iyo maaddadu waa mid adag, waana mid aad u jilicsan oo sahlan in laga jawaabo deegaanka. Haddii ay khaldan tahay, way adagtahay in la helo macluumaadka dhabta ah ee filimka SEI.

Dhumucda filimka SEI waa falcelinta dhinaca parasitic-ka kiimikaad ee caadiga ah, kaas oo xidhiidh dhow la leh kinetics falcelinta, habka wareejinta tirada badan, iyo joomatari qaab dhismeedka batteriga. Si kastaba ha ahaatee, isbeddelka filimka SEI si toos ah uma horseedayo fashilka fashilka burburka, iyo burburkiisu wuxuu keeni doonaa oo kaliya kor u kaca heerkulka gudaha ee baytariga, taas oo keeni karta gaaska burbursan, kulaylka daranna wuxuu keenaa kulaylka xakamaynta. FMMEA, samaynta iyo korriinka filimka SEI waxaa loo tixgeliyaa habka lumitaanka, taas oo keeni karta batterigu inuu yareeyo awoodda oo uu kordhiyo xannibaadda gudaha.

2 Lithium dendrites ayaa abuura, haddii batteriga si degdeg ah loogu dallaco cufnaanta hadda jirta oo ka sarreysa heerka hadda la qiimeeyay, oogada taban si fudud ayaa loo sameeyay si ay u samayso bir lithium dendride ah. Karistaanka dendritic waa sahlan tahay in la dalooliyo diaphragm, taasoo keenta wareeg gaaban gudaha batteriga. Xaaladan waxa laga yaabaa inay keento fashil ku yimaada batteriga, wayna adagtahay in la ogaado ka hor inta aanu batteriga gaabin.

Sanadihii la soo dhaafay, cilmi-baarayaashu waxay daraasad ku sameeyeen heerka kobaca lithium dendride iyo xiriirka ka dhexeeya heerka korriinka lithium dendride iyo awoodda faafinta lithium ion ee lithium dendride. Tijaabooyinku waxay muujinayaan in kobaca lithium delegra ay adagtahay in la ogaado ama lagu eego nidaamka baytari dhamaystiran, iyo qaabka hadda jira wuxuu ku kooban yahay kobaca dendrites lithium ee hoos yimaada hal nidaam. Nidaamka tijaabada ah, baytariga hufan ee lagu dhisay galaaska quartz wuxuu ilaalin karaa habka korriinka ee dendrites-ka goobta.

Cilmi-baaraha Zhang Yuegono ee Suzhou Nanotechnology iyo Nano Bionic Research Institute ee dalkayga ayaa shaaca ka qaaday habka samaynta ee dendrites-ka lithium dendrites (sida ku cad video) tignoolajiyada iskaanka mikroskoob ee elektarooniga ah (SEM). Si kastaba ha noqotee, nidaamka batteriga lithium-ion ee ganacsiga, way adagtahay in la gaaro indho-indheynta asalka ah ee laamaha lithium. Xaaladda caalamiga ahi waa in la ilaaliyo laanta lithium-ka kirismaska ​​iyadoo la kala furfurayo batteriga.

Si kastaba ha noqotee, sababtoo ah dhaqdhaqaaqa laanta lithium waa mid aad u sarreeya, way adagtahay in la falanqeeyo faahfaahinta jiilka. Zier iyo al. Waxaa la soo jeediyay in la sawiro mikrogaram ee elektarooniga ah iyada oo rinjiyeynaysa qaab dhismeedka korantada si loo go&39;aamiyo booska dendrites-yada.

Haddii ka hor inta aan la burburin batteriga, jiilka laanta lithium crystal ayaa sababay gudaha wareegga gaaban ee gudaha, ka dibna qaybtan ka mid ah crystal dendritic ayaa laga yaabaa inay adagtahay in la ilaaliyo sababtoo ah garaaca wadnaha weyn ee wareegga gaaban ee gudaha ayaa sababi kara crystallization laanta lithium. Xiritaanka microporous maxalliga ah ee diaphragm ayaa soo jeedinaysa in booska korriinka ee suurtogalka ah ee dendrites lithium, laakiin qaybahan laga yaabo inay qayb ahaan kulayl yihiin ama ay keento wasakhowga birta. Sidaa darteed, horumarinta dheeraadka ah ee moodooyinka guuldarada si loo saadaaliyo soo bixitaanka laamaha lithium, isla mar ahaantaana, waa mid aad u macno leh in la barto nolosha iyo xiriirka guuldarrada ee xaaladaha kala duwan ee shaqada.

3 Pollization ee walxaha firfircooni waa mid aan sinnayn marka la bixinayo kharashka degdega ah iyo dheecaanka ama korantada walaxda firfircoon, walxaha firfircooni waxay u nugul yihiin budada ama jajabinta. Guud ahaan, marka batteriga la kordhiyo, qaybaha micron-sized, diiqada gudaha ee ion waa la jabin karaa. Dildilaaca bilawga ah waxaa lagu arki karaa SEM dusha sare ee walxaha firfircoon.

Sida isku-xidhka soo noqnoqda ee lithium ions, dildilaaca ayaa si joogto ah u fidaya, taasoo keentay in qaybo dillaacsan. Qaybaha dillaaca ayaa soo bandhigi doona dusha cusub ee firfircoon, iyo filimka SEI ayaa lagu soo saaraa dusha cusub. Baadhitaano iyo falanqaynta lithium ion galinta stress, naqshadaynta qalabka elektiroonigga baytari si fiican.

Christensen iyo Newman iyo al. Waxay soo saartay moodal walbahaarka lithium-ion-ka ee bilawga ah, cilmi-baarayaasha kale waxay balaadhiyeen agabyo kala duwan, iyo qaab-dhismeedka joomatari ee agabka, iyo agabka. Qaabka cadaadiska Ion ee ku duugan ayaa u sahli doona cilmi-baarayaasha inay naqshadeeyaan walxo firfircooni badan.

Si kastaba ha ahaatee, luminta awoodda iyo awoodda walxaha firfircoon ee walxaha firfircoon ayaa la sii daraaseeyaa, iyo habka fashilka ee jajabinta walxaha ayaa si buuxda loo saadaaliyay si loo saadaaliyo nolosha baytariyada lithium-ion. Isbeddelka mugga ee walxaha elektiroonigga ah ayaa sidoo kale sababi kara walaxda firfircoon in laga soo dejiyo ururiyaha hadda, si qaybtan ka mid ah walaxda firfircoon aan la heli karin. Habka lithium-ka aan kootada lahayn ee walxaha firfircoon waxaa weheliya guuritaanka ion iyo guuritaanka elektarooniga ah ee dibadda ee batteriga.

Mar haddii korontolaydu ay si elektaroonik ah u dahaaran tahay, ions kaliya ayaa la keeni karaa. Hab dhaqanka elektarooniga ah ayaa muhiim u ah shabakada korantada ee ay dhistay dusha korantada ee wakiilka korantada. Isbeddellada soo noqnoqda ee mugga walxaha elektiroonigga ah waxay keeni karaan walxaha firfircoon ee qayb ka mid ah shabakadda korantada si ay u sameeyaan nidaam go&39;doonsan, oo aan la heli karin.

Isbeddelkan ku yimaadda qaab-dhismeedka korantada waxa lagu qiyaasi karaa iyadoo la cabbirayo hab sida dalool ama meel gaar ah. Habkan waxa kale oo lagu milmi karaa iyada oo la shiidayo oogada korantada iyada oo la isticmaalayo ion focal ion beam (FIB), iyada oo la isticmaalayo SEM si loo sameeyo indho-indheynta morphological ama raajada sawir qaade iyadoo la isticmaalayo SEM. Walxaha korantada taban waa la nadiifiyaa lagana saaraa shabakada korantada.

Walaxda firfircoon ee korantada togan ee walaxda firfircooni waxay u badan tahay oksaydhka birta kala-guurka, sida lithium cobaltate (LiMn2O4), ama cusbada lithium polyanate, fosfateta birta lithium (LifePo4). Inta badan walxaha firfircoon ee firfircooni waxay ku jiraan hababka falcelinta, iyo hababka cadaadiska iyo hababka hoos u dhaca ayaa inta badan sabab u ah dhicitaanka granules iyo sharaxaadda walxaha firfircoon ee kor ku xusan. Filimka SEI ayaa sidoo kale la soo saaray oo saameeya dusha sare ee korantada togan, laakiin dusha sare ee korantada togan ayaa leh awood sare, filimkiisa SEI waa mid aad u khafiif ah oo deggan.

Intaa waxaa dheer, walxaha korantada togan ayaa sidoo kale u nugul saameynta kuleyliyaha gudaha gudaha, gaar ahaan marka batteriga la saaro. Waqtiga dalladu, electrolyte-ku wuxuu noqdaa mid aan degganayn cadaadis sare, taas oo keenta electrolyte iyo walaxda firfircoon ee firfircoon, taas oo keenta heerkulka gudaha ee baytarigu inuu sii wado inuu kordho, iyo walxaha elektaroonigga ah ayaa sii daaya ogsijiinta. Casriyeyn dheeraad ah, taasoo keentay in kulaylku ka baxo xakamaynta, waxay u horseedi doontaa burbur ku yimaada batteriga.

Walxaha korantada togan ee dhaca inta lagu jiro dallacaadda ka hor waxaa lagu falanqeyn karaa gaaska chromatography si loo falanqeeyo ama loo ogaado qaab-dhismeedka walxaha korantada iyadoo loo marayo qaab-dhismeedka sheyga ogaanshaha spectrum X-ray. Si kastaba ha ahaatee, hadda ma jiro nooc guul-darraystay oo saadaalin kara gudaha batteriga iyada oo uu gaas xad-dhaaf ah ku soo qulqulayo. Soo koobid: Habka fashilka ee bateriga lithium-ion-ka togan iyo walxaha korantada taban ayaa muhiim u ah kala-goynta xuubka SEI, soo-saarka lithium-ka loo wakiishay crystals ama copperprine crystals, budada walxaha firfircoon iyo gaaska kala-goynta kulaylka, iwm.

Waxaa ka mid ah, jiilka soosaarayaasha lithium ama ergo naxaas ah, gaaska jajaban ee walxaha si fudud ayaa u keena kulaylka ka baxsan xakamaynta unugga, taasoo keenta gubasho batteriga, iyo xitaa qarxinta. Guuldarada baytariyada lithium-ion waxaa lagu falanqeeyaa qaabka libdhay, farsamadana waxaa lagu wanaajiyaa iyadoo la wanaajinayo batteriga alaabtiisa, qaab dhismeedka, iyo hagaajinta la qabsiga deegaanka, isku halaynta iyo badbaadada batteriga. Sidaa darteed, waxaa jira muhiimad hagitaan oo aad muhiim u ah soo saarista iyo codsiga dhabta ah ee batteriga.