Ukuhlola into ye-lithium plating kumabhethri e-lithium: Ukhiye wokuvikela ukuphepha nokusebenza kwebhethri.

Sawubona, bangane! Ingabe uyazi ukuthi uyini umthombo wamandla oyinhloko emishinini kagesi esingeke sikwazi ukuphila ngaphandle kwayo nsuku zonke, njengomakhalekhukhwini namakhompyutha aphathekayo? Kulungile, amabhethri e-lithium. Kodwa ingabe uyasiqonda into ethize eyinkinga kumabhethri e-lithium - i-lithium plating? Namuhla, ake sihlole ngokujulile ukwenzeka kwe-lithium plating kumabhethri e-lithium, siqonde ukuthi imayelana nani, imithelela enjani eyilethayo, nokuthi singabhekana kanjani nayo.

I. Yini i-lithium plating kumabhethri e-lithium?

Ukufakwa kwe-lithium kumabhethri e-lithium kufana "nengozi encane" emhlabeni webhethri. Kalula nje, ngaphansi kwezimo ezithile, ama-ion e-lithium ebhethrini kufanele ahlale kahle ku-electrode engemihle, kodwa esikhundleni salokho, aginqa ngokungalungile ebusweni be-electrode engalungile bese ephenduka abe i-lithium eyinsimbi, njengokukhula kwamagatsha amancane. Lokhu sikubiza nge-lithium dendrite. Lo mkhuba uvamise ukwenzeka ezindaweni ezinezinga lokushisa eliphansi noma lapho ibhethri ishajwa ngokuphindaphindiwe futhi ishajwa. Ngoba ngalesi sikhathi, ama-ion e-lithium aphuma ku-electrode eqondile awakwazi ukufakwa ngokuvamile ku-electrode engalungile futhi "angamisa ikamu" kuphela ebusweni be-electrode engalungile.

II. Kungani kwenzeka i-lithium plating?

Isenzo se-lithium plating asiveli ngaphandle kwesizathu. Kubangelwa izici eziningi ezisebenzisanayo.

Okokuqala, uma "indlu encane" ye-electrode engalungile ingenkulu ngokwanele, okungukuthi, umthamo we-electrode ongemuhle ungenele ukuhlalisa wonke ama-ion e-lithium asuka ku-electrode eqondile, khona-ke ama-ion e-lithium angaphezu kwamandla angancipha kuphela ebusweni be-electrode. i-electrode engalungile.

Okwesibili, qaphela lapho ushaja! Uma ishaja emazingeni okushisa aphansi, ngomsinga omkhulu, noma ukushajwa ngokweqile, kufana nokuba nezihambeli eziningi eziza "endlini encane" ye-electrode eyinegethivu ngesikhathi esisodwa. Ayikwazi ukuyiphatha, futhi i-lithium ion ayikwazi ukufakwa ngesikhathi, ngakho-ke kwenzeka into ye-lithium plating.

Futhi, uma isakhiwo sangaphakathi sebhethri singakhiwe ngendlela enengqondo, njengokuthi kukhona imibimbi kusihlukanisi noma iseli yebhethri ikhubazekile, izothinta indlela eya ekhaya ye-lithium ion futhi ibenze bangakwazi ukuthola isiqondiso esifanele, okuyinto kungaholela kalula ku-lithium plating.

Ngaphezu kwalokho, i-electrolyte ifana "nomhlahlandlela omncane" we-lithium ions. Uma inani le-electrolyte linganele noma amapuleti e-electrode engangenwa ngokugcwele, ama-ion e-lithium azolahleka, futhi i-lithium plating izolandela.

Ekugcineni, ifilimu ye-SEI ebusweni be-electrode engalungile nayo ibaluleke kakhulu! Uma iba nkulu kakhulu noma yonakele, i-lithium ion ayikwazi ukungena ku-electrode engalungile, futhi kuzovela into ye-lithium plating.

III. Singayixazulula kanjani i-lithium plating?

Ungakhathazeki, sinezindlela zokubhekana ne-lithium plating.

Singathuthukisa ukwakheka kwebhethri. Isibonelo, klama ibhethri ngokunengqondo kakhudlwana, yehlisa indawo ebizwa nge-Overhang, sebenzisa idizayini yamathebhu amaningi, futhi ulungise isilinganiso se-N/P ukuze uvumele ama-ion e-lithium ukuthi ahambe kahle kakhulu.

Ukulawula ukushajwa nokushajwa kwebhethri nakho kubalulekile. Kufana nokuhlela "imithetho yethrafikhi" efanele ye-lithium ion. Lawula i-voltage yokushaja nokukhipha, yamanje, nezinga lokushisa ukuze ukusabela kwe-lithium plating kungenzeki.

Ukuthuthukisa ukwakheka kwe-electrolyte nakho kuhle. Singangeza usawoti we-lithium, izithasiselo, noma izincibilikisi ezihlangene ukuze senze i-electrolyte ibe ngcono. Ayikwazi ukuvimbela kuphela ukubola kwe-electrolyte kodwa futhi ivimbele ukusabela kwe-lithium plating.

Singakwazi futhi ukuguqula impahla electrode negative. Kufana nokubeka "izingubo zokuzivikela" ku-electrode engalungile. Ngezindlela ezinjengokumboza phezulu, i-doping, noma i-alloying, singakwazi ukuthuthukisa ukuzinza kanye nekhono le-anti-lithium plating le-electrode engalungile.

Yebo, isistimu yokuphatha ibhethri nayo ibalulekile. Kufana "nomshini wamanzi" ohlakaniphile oqapha futhi alawule ngobuhlakani inqubo yokushaja nokukhipha ngesikhathi sangempela ukuze aqinisekise ukuthi ibhethri lisebenza ngaphansi kwezimo eziphephile, ligwema ukushajwa ngokweqile nokukhipha, futhi linciphise ubungozi be-lithium plating.

IV. Iyiphi imithelela i-lithium plating enawo kumabhethri?

I-Lithium plating akuyona into enhle! Izokwenza ukuthi i-lithium dendrites ikhule ngaphakathi kwebhethri. Lawa ma-lithium dendrite afana nabahlukumezi abancane. Bangase bangene kusihlukanisi futhi babangele isifunda esifushane sangaphakathi, esiyingozi kakhulu. Mhlawumbe kuzodala ngisho nezingozi ezishisayo nezokuphepha. Ngaphezu kwalokho, ngesikhathi senqubo ye-lithium plating, inani lama-ion e-lithium liyehla, futhi umthamo webhethri nawo uzokwehla, kufinyeze impilo yesevisi yebhethri.

V. Buyini ubudlelwano phakathi kwezindawo ezinezinga lokushisa eliphansi kanye ne-lithium plating?

Ezindaweni ezinezinga lokushisa eliphansi, i-electrolyte izonamathela. Imvula ye-lithium ku-electrode engalungile izoba nzima kakhulu, ukuvinjelwa kokudluliswa kwenkokhiso kuzokwanda, futhi izimo ze-kinetic nazo zizowohloka. Lezi zici zihlanganisiwe zifana nokwengeza uphethiloli entweni ye-lithium plating, okwenza amabhethri e-lithium athambekele kakhulu ekufakweni kwe-lithium ezindaweni ezinezinga lokushisa eliphansi futhi kuthinte ukusebenza okusheshayo nempilo yesikhathi eside yebhethri.

VI. Isistimu yokuphatha ibhethri inganciphisa kanjani i-lithium plating?

Uhlelo lokuphatha ibhethri lunamandla kakhulu! Ingakwazi ukuqapha amapharamitha ebhethri ngesikhathi sangempela, njengamehlo amabili abukhali, ihlale ibheka isimo sebhethri. Bese ulungisa isu lokushaja ngokuya ngedatha ukwenza ama-lithium ion alalele.

Ingakwazi futhi ukukhomba izinguquko ezingavamile kwijika lokushaja ibhethri. Njengomseshi ohlakaniphile, ingabikezela isenzakalo se-lithium plating kusengaphambili futhi siyigweme.

Ukuphatha okushisayo nakho kubaluleke kakhulu! Isistimu yokuphatha ibhethri ingafudumeza noma ipholise ibhethri ukuze ilawule izinga lokushisa lokusebenza futhi ivumele ama-ion e-lithium ukuthi ahambe ezingeni lokushisa elifanele ukuze kwehliswe ingcuphe ye-lithium plating.

Ukushaja okulingana nakho kubalulekile. Ingaqinisekisa ukuthi ibhethri ngalinye kuphakethe lebhethri lishajwa ngokulinganayo, njengokuvumela i-lithium ion ngayinye ukuthi ithole "igumbi" layo elincane.

Ngaphezu kwalokho, ngokuthuthuka kwesayensi yezinto zokwakha, singakwazi futhi ukuthuthukisa impahla ye-electrode engalungile kanye nesakhiwo sebhethri ukuze senze ibhethri libe namandla.

Okokugcina, ukulungisa izinga lokushaja nokusabalalisa kwamanje nakho kubalulekile. Gwema ukuminyana kwamanje okweqile futhi usethe i-voltage enqamukayo yokushaja ukuze uvumele ama-ion e-lithium ukuthi afakwe ngokuphephile ku-electrode eyinegethivu.

Sengiphetha, nakuba into ye-lithium plating kumabhethri e-lithium iyinkinga kancane, inqobo nje uma siqonda ngokujulile izimbangela zayo futhi sithatha izinyathelo eziphumelelayo zokuvimbela nokulawula, singenza amabhethri e-lithium aphephe kakhudlwana, abe nokusebenza kangcono, futhi abe nempilo ende yesevisi. Masisebenze ndawonye ukuze sivikele amabhethri ethu e-lithium!