Masu bincike dagaJami'ar Fasaha ta Munich(TUM) da kumaJami'ar RWTH Aachena Jamus sun kwatanta aikin wutar lantarki na batirin sodium-ion mai ƙarfi (SIBs) da na batirin lithium-ion mai ƙarfi na zamani (LIBs) tare da cathode na lithium-iron-phosphate (LFP).

Ƙungiyar ta gano cewa yanayin caji da zafin jiki suna da tasiri mafi girma akan juriyar bugun jini da kuma juriyar SIBs fiye da LIBs, wanda zai iya rinjayar zaɓin ƙira kuma yana ba da shawarar cewa SIBs na iya buƙatar tsarin sarrafa zafin jiki da caji mai zurfi don inganta aiki, musamman a ƙananan matakan caji.

• Don ƙarin bayani game da juriyar bugun jini: kalmar tana nufin yadda ƙarfin batirin ke raguwa idan aka yi amfani da buƙatar wutar lantarki kwatsam. Saboda haka, binciken ya nuna cewa batirin sodium-ion sun fi shafar matakin caji da zafin jiki fiye da batirin lithium-ion.

Bincike:

Masana kimiyya sun ce, "Batiran Sodium-ion [SIBs] galibi ana ɗaukar su a matsayin madadin LIBs," in ji masana kimiyya. "Duk da haka, bambance-bambancen da ke cikin halayen electrochemical na sodium da lithium suna buƙatar daidaitawa akan anode da cathode. Duk da cewa ga batirin lithium-ion [LIBs] yawanci ana amfani da graphite azaman kayan anode, don SIBs ana ɗaukar carbon mai tauri a matsayin kayan da ya fi kyau ga SIBs."

Sun kuma bayyana cewa aikinsu an yi shi ne don cike gibin da ke cikin binciken, domin har yanzu akwai rashin ilimi game da yanayin wutar lantarki na SIBs dangane da yanayin zafi da yanayin caji daban-daban (SOCs).

Ƙungiyar binciken ta gudanar, musamman, ma'aunin aikin lantarki a yanayin zafi daga digiri 10 na Celsius zuwa digiri 45 na Celsius da kuma ma'aunin ƙarfin lantarki na cikakken ƙwayar halitta a yanayin zafi daban-daban da kuma ma'aunin rabin ƙwayar halitta na ƙwayoyin da suka dace a digiri 25 na Celsius.

"Bugu da ƙari, mun bincika tasirin zafin jiki da SOC akan juriyar wutar lantarki kai tsaye (R DC) da kuma galvanostatic electrochemical impedance spectroscopy (GEIS)," in ji ta. "Don bincika ƙarfin amfani, kuzarin da za a iya amfani da shi, da kuma ingancin makamashi a ƙarƙashin yanayi mai ƙarfi, mun yi gwaje-gwajen ƙarfin aiki ta hanyar amfani da ƙimar kaya daban-daban a yanayin zafi daban-daban."

Masu binciken sun auna batirin lithium-ion, batirin sodium-ion mai cathode na nickel-manganese-iron, da kuma batirin lithium-ion mai cathode na LFP. Duk ukun sun nuna ƙarfin lantarki, ma'ana ƙarfin wutar lantarki nasu na buɗewa ya bambanta tsakanin caji da fitarwa.

"Abin sha'awa, ga SIBs, hysteresis galibi yana faruwa ne a ƙananan SOCs, wanda, bisa ga ma'aunin rabin tantanin halitta, wataƙila saboda sinadarin carbon mai tauri," in ji masana kimiyya. "R DC da impedance na LIB ba su nuna dogaro sosai ga SOC ba. Sabanin haka, ga SIBs, R DC da impedance suna ƙaruwa sosai a SOCs ƙasa da 30%, yayin da SOCs mafi girma suna da akasin haka kuma suna haifar da ƙarancin ƙimar R DC da impedance."

Bugu da ƙari, sun tabbatar da cewa dogaro da yanayin zafi na R_DC da impedance ya fi girma ga SIBs fiye da LIBs. "Gwaje-gwajen LIB ba su nuna wani tasiri mai mahimmanci na SOC akan ingancin tafiya ta dawowa ba. Sabanin haka, hawan SIBs daga 50% zuwa 100% SOC na iya rage asarar inganci da fiye da rabi idan aka kwatanta da hawan keke daga 0% zuwa 50%," sun ƙara bayyana, suna lura da cewa ingancin SIBs yana ƙaruwa sosai lokacin da ake hawan ƙwayoyin halitta a cikin mafi girman kewayon SOC idan aka kwatanta da ƙaramin kewayon SOC.