(Lithium metal anode) Pae Interfacial o ka electrolyte paʻa i loaʻa mai ka anion hou

Hoʻohana nui ʻia ka Solid Electrolyte Interphase (SEI) e wehewehe i ke ʻano hou i hoʻokumu ʻia ma waena o ka anode a me ka electrolyte i loko o nā pila hana. Hoʻopilikia nui ʻia nā pila metala lithium (Li) kiʻekiʻe e ka dendritic lithium dendritic i alakaʻi ʻia e ka SEI like ʻole. ʻOiai he mau pono kūikawā kona i ka hoʻomaikaʻi ʻana i ke ʻano like o ka lithium deposition, i nā noi hana, ʻaʻole kūpono ka hopena o ka anion-derived SEI. I kēia manawa, ua manaʻo ka hui noiʻi a Zhang Qiang mai ke Kulanui ʻo Tsinghua e hoʻohana i nā anion receptors e hoʻoponopono i ke ʻano electrolyte e kūkulu i kahi anion-derived SEI paʻa. ʻO ka tris(pentafluorophenyl)borane anion receptor (TPFPB) me nā ʻātoma boron electron-deficient e launa pū me ka bis(fluorosulfonimide) anion (FSI-) e hōʻemi i ka paʻa o ka FSI-. Eia kekahi, i ke alo o TFPPB, ua loli ke ʻano o nā ion clusters (AGG) o FSI- i loko o ka electrolyte, a ua launa pū ʻo FSI- me nā Li+ hou aku. No laila, ua paipai ʻia ka hoʻokaʻawale ʻana o FSI- e hana i ka Li2S, a ua hoʻomaikaʻi ʻia ke kūpaʻa o ka SEI i loaʻa mai ka anion.

Ua haku ʻia ʻo SEI me nā huahana hoʻohaʻahaʻa o ka electrolyte. ʻO ke ʻano a me ke ʻano o SEI e kāohi nui ʻia e ke ʻano o ka electrolyte, ʻo ia hoʻi, ka pilina microscopic ma waena o ka solvent, anion, a me Li+. ʻAʻole wale ka loli o ke ʻano o ka electrolyte me ke ʻano o ka solvent a me ka paʻakai lithium, akā me ka nui o ka paʻakai. I nā makahiki i hala iho nei, ua hōʻike ka electrolyte kiʻekiʻe-concentration (HCE) a me ka electrolyte kiʻekiʻe-concentration localized (LHCE) i nā pono kūikawā i ka hoʻopaʻa ʻana i nā anodes lithium metal ma ka hoʻokumu ʻana i kahi SEI paʻa. He haʻahaʻa ka ratio molar o ka solvent i ka paʻakai lithium (ʻoi aku ka liʻiliʻi ma mua o 2) a ua hoʻokomo ʻia nā anions i loko o ka ʻeke solvation mua o Li+, e hana ana i nā hui ion contact (CIP) a me ka aggregation (AGG) ma HCE a i ʻole LHCE. Hoʻoponopono ʻia ke ʻano o SEI ma hope e nā anions ma HCE a me LHCE, i kapa ʻia ʻo SEI i loaʻa mai ka anion. ʻOiai kona hana hoihoi i ka hoʻopaʻa ʻana i nā anodes lithium metal, ʻaʻole lawa nā SEI i loaʻa mai ka anion i kēia manawa i ka hoʻokō ʻana i nā pilikia o nā kūlana hana. No laila, pono e hoʻomaikaʻi hou aku i ke kūpaʻa a me ke kūlike o ka SEI i loaʻa mai ka anion e lanakila ai i nā pilikia ma lalo o nā kūlana maoli.

ʻO nā anions ma ke ʻano o CIP a me AGG nā mea mua no ka SEI i loaʻa mai ka anion. Ma keʻano laulā, ua hoʻoponopono pololei ʻole ʻia ke ʻano electrolyte o nā anions e Li+, no ka mea, ua nāwaliwali ka hoʻopiʻi maikaʻi o nā mole solvent a me nā diluent a ʻaʻole hiki ke launa pololei me nā anions. No laila, ua manaʻo nui ʻia nā hoʻolālā hou no ka hoʻoponopono ʻana i ke ʻano o nā electrolytes anionic ma o ka launa pololei ʻana me nā anions.