ʻO nā mea noiʻi mai kaKe Kulanui ʻenehana o Munich(TUM) aRWTH Aachen Universityma Kelemānia ua hoʻohālikelike i ka hana uila o nā pāpaʻi sodium-ion kiʻekiʻe (SIBs) me ka mea o ka ʻenehana lithium-ion kiʻekiʻe (LIB) me kahi cathode lithium-iron-phosphate (LFP).

Ua ʻike ka hui he ʻoi aku ka ʻoi aku o ka mana o ka mokuʻāina a me ka mahana i ka pale ʻana i ka pulse a me ka impedance o nā SIB ma mua o nā LIB, hiki ke hoʻololi i nā koho hoʻolālā a manaʻo ʻia paha e koi aku nā SIB i nā ʻōnaehana ʻoi aku ka maʻalahi a me nā ʻōnaehana hoʻokele uku e hoʻokō i ka hana, ʻoi aku ma nā pae haʻahaʻa haʻahaʻa.

• No ka wehewehe hou ʻana i ka pale ʻana i ka pulse: ʻo ka huaʻōlelo e pili ana i ka nui o ka hāʻule ʻana o ka uila uila ke noi ʻia kahi koi ikaika. No laila, hōʻike ka noiʻi ʻoi aku ka hopena o nā pākaʻi sodium-ion e ka pae hoʻoiho a me ka mahana ma mua o nā pā lithium-ion.

Noiʻi:

"ʻIke ʻia nā pākaona sodium-ion [SIBs] ma ke ʻano he hāʻule-i pani no nā LIB," wahi a nā ʻepekema. "Akā naʻe, ʻo ka ʻokoʻa o ka hana electrochemical o ka sodium a me ka lithium e pono ai ke hoʻololi ʻia ma ka anode a me ka cathode. ʻOiai no nā pā lithium-ion [LIBs] maʻamau e hoʻohana ʻia ka graphite ma ke ʻano he anode, no ka mea, ʻike ʻia ke kalapona paʻakikī SIB i kēia manawa ʻo ka mea hoʻohiki maikaʻi loa no nā SIB.

Ua wehewehe pū lākou ua manaʻo ʻia kā lākou hana e hoʻopiha i kahi āpau o ka noiʻi, no ka mea, aia nō ka nele o ka ʻike e pili ana i ke ʻano uila o nā SIB e pili ana i nā ʻano wela like ʻole a me nā state-of-charges (SOCs).

Ua alakaʻi ka hui noiʻi, ʻo ia hoʻi, nā ana hana uila ma nā mahana mai ka 10 degere C a 45 degere C a me nā ana ʻana o ka puʻupuʻu kaapuni hāmama o ka cell piha i nā wela like ʻole a me nā ana hapalua o nā cell pili i 25 C.

"Eia kekahi, ua noiʻi mākou i ka mana o ka mahana a me ka SOC ma ke kū'ē kū pololei (R DC) a me ka galvanostatic electrochemical impedance spectroscopy (GEIS)," i ʻōlelo ʻia. "No ka nānā ʻana i ka hiki ke hoʻohana ʻia, ka ikehu hiki ke hoʻohana ʻia, a me ka pono o ka ikehu ma lalo o nā kūlana dynamic, ua hana mākou i nā hoʻokolohua hiki ke hoʻohana ʻia ma o ka hoʻohana ʻana i nā uku ukana ʻē aʻe i nā wela like ʻole."

Ua ana nā mea noiʻi i kahi pākahi lithium-ion, kahi pānaʻi sodium-ion me ka nickel-manganese-iron cathode, a me ka lithium-ion me kahi cathode LFP. Ua hōʻike nā mea ʻekolu i ka hysteresis voltage, ʻo ia hoʻi, ʻokoʻa kā lākou puʻupuʻu ākea ma waena o ka hoʻouka ʻana a me ka hoʻokuʻu ʻana.

"ʻO ka mea hoihoi, no nā SIB, ke kū mua nei ka hysteresis ma nā SOC haʻahaʻa, ʻo ia hoʻi, e like me ke ana ʻana o ka hapalua-cell, ma muli paha o ka anode carbon paʻakikī," i ʻōlelo ai ka poʻe hoʻonaʻauao. "Ke hōʻike nei ka R DC a me ka impedance o ka LIB i ka hilinaʻi liʻiliʻi loa i ka SOC. ʻO ka hoʻohālikelike, no nā SIB, ʻo ka R DC a me ka impedance e hoʻonui nui ʻia ma SOC ma lalo o 30%, aʻo nā SOC kiʻekiʻe ka hopena ʻē aʻe a alakaʻi i ka haʻahaʻa R DC a me nā waiwai impedance. "

Eia kekahi, ua ʻike lākou ʻoi aku ka kiʻekiʻe o ka hilinaʻi o ka mahana o R_DC a me ka impedance no SIB ma mua o LIB. "ʻAʻole hōʻike nā hōʻike LIB i ka mana koʻikoʻi o ka SOC i ka holomua o ka huakaʻi holo kaʻa. ʻO ka hoʻohālikelike ʻana, ʻo ka holo kaʻa ʻana i nā SIB mai 50% a 100% SOC hiki ke hōʻemi i ka nalowale o ka pono ma mua o ka hapalua i hoʻohālikelike ʻia i ka paikikala mai 0% a i 50%, "e wehewehe hou ana lākou, me ka ʻike ʻana e ulu nui ana ka maikaʻi o nā SIB i ka wā e hoʻohālikelike ai i ka pae kiʻekiʻe o ka SOC.