Masu bincike dagaJami'ar Fasaha ta Munich(TUM) daRWTH Aachen Universitya Jamus sun kwatanta aikin lantarki na batir sodium-ion mai ƙarfi (SIBs) zuwa na baturi na lithium-ion baturi na zamani (LIBs) tare da lithium-iron-phosphate (LFP) cathode.

Ƙungiyar ta gano cewa halin da ake ciki da zafin jiki yana da tasiri mafi girma a kan juriya na bugun jini da kuma rashin daidaituwa na SIB fiye da LIBs, wanda zai iya rinjayar zaɓin ƙira kuma yana nuna cewa SIBs na iya buƙatar ƙarin zafin jiki mai mahimmanci da tsarin gudanarwa na caji don inganta aikin, musamman a ƙananan matakan caji.

• Don ƙarin bayani juriya na bugun jini: kalmar tana nufin nawa ƙarfin ƙarfin baturi ke faɗuwa lokacin da aka yi amfani da buƙatar wutar lantarki kwatsam. Saboda haka, binciken ya nuna cewa baturan sodium-ion sun fi shafar matakin caji da zafin jiki fiye da batir lithium-ion.

Bincike:

"Batir Sodium-ion [SIBs] ana ganin gabaɗaya a matsayin maye gurbin LIBs," in ji masanan. "Duk da haka, bambance-bambance a cikin halayen electrochemical na sodium da lithium suna buƙatar daidaitawa akan duka anode da cathode. Yayin da batir lithium-ion [LIBs] yawanci ana amfani da graphite azaman kayan anode, don SIBs mai wuyar carbon a halin yanzu ana ganin shi ne mafi kyawun abu ga SIBs."

Sun kuma bayyana cewa aikin nasu an yi shi ne don cike gibi a cikin binciken, saboda har yanzu akwai karancin sanin yanayin wutar lantarki na SIB ta fuskar yanayin zafi da kuma yanayin caji (SOCs).

Tawagar binciken ta gudanar, musamman, ma'aunin aikin lantarki a yanayin zafi daga digiri 10 C zuwa 45 C da ma'aunin wutar lantarki na buɗaɗɗen tantanin halitta a yanayin zafi daban-daban da ma'aunin rabin-cell na sel masu dacewa a 25 C.

"Bugu da ƙari, mun bincika tasirin zafin jiki da SOC akan juriya na yanzu kai tsaye (R DC) da galvanostatic electrochemical impedance spectroscopy (GEIS)," in ji shi. "Don bincika ƙarfin da za a iya amfani da shi, makamashin da za a iya amfani da shi, da ingancin makamashi a ƙarƙashin yanayi mai ƙarfi, mun yi gwajin ƙarfin ƙima ta hanyar amfani da ƙimar nauyi daban-daban a yanayin zafi daban-daban."

Masu binciken sun auna baturin lithium-ion, baturin sodium-ion mai nickel-manganese-iron cathode, da baturi na lithium-ion tare da cathode na LFP. Dukansu ukun sun nuna ƙarfin ƙarfin wutar lantarki, ma'ana ƙarfin wutar lantarkin buɗewar su ya bambanta tsakanin caji da fitarwa.

"Abin sha'awa shine, ga SIBs, hysteresis yana faruwa ne da farko a ƙananan SOCs, wanda shine, bisa ga ma'aunin rabin-cell, mai yiwuwa saboda ƙarancin carbon anode," masanan sun jaddada. "R DC da impedance na LIB sun nuna kadan dogara ga SOC. Sabanin haka, ga SIBs, R DC da impedance suna karuwa sosai a SOCs da ke ƙasa da 30%, yayin da SOCs mafi girma suna da tasiri mai tasiri kuma suna haifar da ƙananan R DC da ƙimar haɓaka."

Bugu da ƙari, sun tabbatar da cewa dogaro da zafin jiki na R_DC da impedance ya fi girma ga SIB fiye da LIBs. "Gwajin LIB ba su nuna wani tasiri mai mahimmanci na SOC akan tasirin tafiya ba. Ya bambanta, yin amfani da SIBs daga 50% zuwa 100% SOC zai iya rage yawan hasara ta fiye da rabi idan aka kwatanta da hawan keke daga 0% zuwa 50%, "sun kara bayyana, lura da cewa yadda ya dace na SIBs a lokacin da aka kwatanta da ƙananan SIBs a lokacin da aka kwatanta da ƙananan SIBs a cikin ƙananan ƙananan ƙananan ƙananan SIBs. Farashin SOC.