Menene dalilin ƙarfin batirin lithium?

Awdur: Iflowpower - Mofani oa Seteishene sa Motlakase se nkehang

A cewar rahotanni, ƙarfin fitarwa na baturin lithium-ion kusan 31.5% ne kawai a zafin jiki a -20 ¡ã C. Batirin lithium-ion na gargajiya yana aiki da zafin jiki tsakanin -20 ~ + 55 ¡ã C.

Amma a cikin nau&39;in sararin samaniya, motocin lantarki, suna buƙatar baturi yayi aiki da kyau a -40 ¡ã C. Sabili da haka, yana da mahimmanci don inganta ƙarancin zafin jiki na batirin lithium ion. A cikin ƙananan yanayin zafi, danko na electrolyte yana ƙaruwa, ko da wani bangare yana da ƙarfi, yana haifar da ƙarancin aiki na baturin lithium ion.

Daidaituwa tsakanin electrolyte da mummunan lantarki da diaphragm yana lalacewa a cikin ƙananan yanayin zafi. Mummunan lantarki na baturin lithium ion a ƙarƙashin ƙananan yanayin zafi ya yi hazo sosai, kuma an mayar da sinadarin lithium ɗin ƙarfe da aka yi da na&39;urar lantarki, kuma jigon samfurin ya haifar da kauri mai ƙarfi na lantarki (SEI). Batirin lithium-ion a ƙarƙashin ƙananan yanayin zafi yana rage tsarin watsawa na ciki na abu mai aiki, ƙarfin canja wurin caji (RCT) yana ƙaruwa sosai.

Mahimman hangen nesa 1: Maganin Electrolyne yana rinjayar ƙarancin zafin jiki na batir lithium ion, abun da ke ciki da kayan aiki na electrolyte suna da mummunar tasiri akan aikin ƙananan zafin jiki. Matsala a saman baturin shine: dankowar electrolyte zai zama babba, ion conductivity yana sannu a hankali, yana haifar da gudun hijirar electron na kewayen waje, don haka baturin ya lalace sosai, kuma karfin caji da fitarwa yana da raguwa sosai. Musamman lokacin caji mara ƙarancin zafi, lithium ions na iya ƙirƙirar lithium delegranes cikin sauƙi a saman ƙarancin lantarki, wanda ke haifar da gazawar baturi.

Ƙarƙashin yanayin zafi na electrolyte yana da alaƙa da girman girman kansa na lantarki, watsawar ion na lantarki yana da sauri, kuma ana iya yin ƙarin iya aiki a ƙananan yanayin zafi. Yawancin gishirin lithium a cikin electrolyte, yawan adadin ƙaura, mafi girma da haɓakawa. Babban ƙarfin wutar lantarki, mafi saurin ion conductivity, ƙarami polarization, mafi kyawun aikin baturi a ƙananan zafin jiki.

Sabili da haka, haɓaka aiki mafi girma shine yanayin da ya zama dole don samun kyakkyawan aikin ƙarancin zafin jiki na batir lithium ion. Ƙwararren wutar lantarki na lantarki yana da alaƙa da abun da ke cikin electrolyte, kuma danko na sauran ƙarfi shine inganta hanyar lantarki. Ruwan daɗaɗɗen kaushi yana da kyau a ƙananan zafin jiki na sauran ƙarfi shine garantin jigilar ion, kuma ƙaƙƙarfan membrane na electrolyte da aka samar da electrolyte a cikin ƙananan zafin jiki kuma shine mabuɗin da zai shafi tasirin lithium ion conductance, kuma RSEI shine matsa lamba na baturin lithium ion a cikin ƙananan yanayin zafi.

Masanin 2: Abubuwan ɗanɗano don iyakance ƙarancin zafin aikin batirin lithium ion ƙananan yanayin zafi ne, sabon rashin ƙarfi na Li +, amma ba fim ɗin SEI ba. Tsarin shimfidar wuri yana da duka tashar watsawar lithium-ion mai girma ɗaya, wanda ke da kwanciyar hankali tsarin tashoshi mai girma uku, kuma shine farkon kasuwanci tabbataccen baturi na lithium ion. Abubuwan wakilcinsa sun haɗa da LiCoO2, Li (CO1-XNIX) O2 da Li (Ni, Co, Mn) O2, e.