(Lithium metala anode) Mahele waena o ka anion-i loaʻa i ka electrolyte paʻa

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

Hoʻokumu ʻia ʻo SEI i nā huahana decomposition hoʻemi o ka electrolyte.ʻO ka haku mele ʻana a me ke ʻano o SEI e hoʻomalu nui ʻia e ke ʻano o ka electrolyte, ʻo ia hoʻi, ka pilina microscopic ma waena o ka solvent, anion, a me Li+.ʻAʻole hoʻololi ke ʻano o ka electrolyte me ke ʻano o ka solvent a me ka paʻakai lithium, akā pū kekahi me ka paʻakai.I nā makahiki i hala iho nei, ua hōʻike ʻo High-Concentration electrolyte (HCE) a me localized high-concentration electrolyte (LHCE) i nā pono kūikawā i ka hoʻopaʻa ʻana i nā anodes metala lithium ma o ka hoʻokumu ʻana i kahi SEI paʻa.He haʻahaʻa ka ratio molar o ka mea hoʻoheheʻe i ka paʻakai lithium (emi ma mua o 2) a ua hoʻokomo ʻia nā anion i loko o ka sheath solvation mua o Li+, e hana ana i nā hui ion contact (CIP) a me ka hoʻohui ʻana (AGG) ma HCE a i ʻole LHCE.Hoʻoponopono ʻia ke ʻano o SEI e nā anion i HCE a me LHCE, i kapa ʻia ʻo SEI i loaʻa i ka anion.ʻOiai ʻo kāna hana maikaʻi i ka hoʻopaʻa ʻana i nā anodes metala lithium, ʻaʻole lawa nā SEI i loaʻa i kēia manawa i ka hoʻokō ʻana i nā pilikia o nā kūlana kūpono.No laila, pono e hoʻomaikaʻi hou i ke kūpaʻa a me ka kūlike o ka SEI i loaʻa i ka anion e lanakila ai i nā pilikia ma lalo o nā kūlana maoli.

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