Xazulula izixazululo ezingaba khona zokukhula kwe-dendride yebhethri ye-lithium-ion eshajwe kabusha

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Portable Power Station supplementum

Ithimba lokucwaninga likaVice Professor, i-University of Davis, eCalifornia, lanyathelisa iphepha elisha ku-"Science Progress", liphakamisa isisombululo esingaba khona sokuxazulula i-lithium rechargeable lithium battery dendrites. Ithimba le-WAN lifakazela ukuthi ama-ion ageleza eduze kwe-cathode angase anwebe lokhu kuphepha kwebhethri okushajwa kabusha esizukulwaneni esilandelayo nempilo yesevisi. Ibhethri yensimbi ye-lithium isebenzisa insimbi ye-lithium njenge-anode.

Lawa mabhethri anomthamo omkhulu wokushajwa futhi angase aphindwe kabili, kodwa ukuphepha kuyinkinga enkulu. Lapho eshaja, amanye ama-ion azoncishiswa abe yinsimbi ye-lithium ebusweni bendawo ye-cathode futhi akhe i-microstructure yesihlahla engajwayelekile, ebizwa ngokuthi i-dendritic, engagcina iholele kumasekhethi amafushane noma ngisho nokuqhuma. Ngokombono, ukukhula kwamakristalu e-dendritic kubangelwa ukuncintisana kokulethwa kwekhwalithi kanye ne-lithium ion eduze kwendawo ye-cathode.

Uma isivinini sokunciphisa i-ion sishesha kunesivinini sokudlulisa ngobuningi, ikhiqiza igebe le-electron neutral elingaqukethe ama-ion eduze kwe-cathode, ebizwa ngokuthi ungqimba lwe-spatial charge. Kukholakala ukuthi ukungazinzi kwalolu ungqimba kungabangela ukukhula kwama-dendrites, ngaleyo ndlela ukunciphisa noma ukuqeda kungase kunciphise ukukhula kwama-dendrites, ngaleyo ndlela kwandise ukuphila kwebhethri. Amabhethri ensimbi ye-lithium angakhiqiza kalula ama-dendrite ensimbi, angabangela ukujikeleza okufushane noma ukuqhuma kwebhethri.

Onjiniyela baseYunivesithi yaseCalifornia Davis babonisa ukuthi amaphutha e-ion eduze ne-cathode angayivimbela le nkinga. Kulo mfanekiso, izinga lokugeleza kwe-electrode eyandayo linganciphisa ukukhula kwamakristalu e-dendritic ebusweni. Umqondo we-deoxidation wehliswa ngo-99% we-WAN ukwenza ama-ion ageleze kuma-cathode esiteshini se-microfluidic ukubuyisela izindleko futhi akha lesi sikhala.

Ithimba lichaza ukuhlolwa kwalo komqondo ephepheni, lithole ukuthi lokhu kusakazwa kwe-ion kunganciphisa ukukhula kwama-dendrites ngo-99%. Ku-WAN, lolu cwaningo luyajabulisa ngoba lubonisa ukusebenza kahle kokusebenzisa ubuchwepheshe be-microfluidic ezindabeni ezihlobene nebhethri, futhi luvule umgwaqo wocwaningo lwangomuso kulo mkhakha. Uthe: “Ngalolu cwaningo oluyisisekelo nendlela ye-microfluidic, singakwazi ukulinganisa imiphumela yokugeleza kuma-dendrites.

"" Awekho amaqembu amaningi ocwaningo angacwaninga lokhu. ". "Nakuba kungenakwenzeka ukuhlanganisa i-microfluid kumabhethri angempela, ithimba le-WAN lifuna ezinye izindlela zokusebenzisa isimiso esiyisisekelo salolu cwaningo, kanye nokwethula ukugeleza kwendawo eduze kwendawo ye-cathode ukuze kunxeshezelwe ama-cations futhi kuqedwe izendlalelo zokushaja kwendawo.

Uthe: “Sijabule kakhulu ukuhlola isicelo sethu esisha. "Besikade siklama indawo ye-cathode ukwethula i-convection. ".