He whānuitia te whakamahinga o te Ine-irahiko Totoka (SEI) hei whakaahua i te wāhanga hou i hangaia i waenga i te anode me te electrolyte i roto i ngā pākahiko mahi. Ko ngā pākahiko whakarewa lithium (Li) kiato kaha teitei ka tino āraihia e te whakatakotoranga lithium dendritic e arahina ana e te SEI kore-taurite. Ahakoa he painga ahurei tōna ki te whakapai ake i te taurite o te whakatakotoranga lithium, i roto i ngā tono mahi, kāore i te tino pai te pānga o te SEI i ahu mai i te anion. Nō nā tata nei, i whakaaro te rōpū rangahau a Zhang Qiang mai i Te Whare Wānanga o Tsinghua ki te whakamahi i ngā kaiwhakawhiwhi anion hei whakatika i te hanganga electrolyte hei hanga i tētahi SEI i ahu mai i te anion pumau. Ko te kaiwhakawhiwhi anion tris(pentafluorophenyl)borane (TPFPB) me ngā ngota boron kore-irahiko ka taunekeneke ki te anion bis(fluorosulfonimide) (FSI-) hei whakaiti i te pumau whakaiti o te FSI-. Hei tāpiri, i te aroaro o te TFPPB, kua rerekē te momo tautau katote (AGG) o te FSI- i roto i te electrolyte, ā, ka taunekeneke te FSI- me te nui ake o te Li+. Nō reira, ka whakatairangahia te wetewete o te FSI- hei whakaputa i te Li2S, ā, ka pai ake te pumau o te SEI i ahu mai i te anion.
Ko te SEI he mea tito mai i ngā hua pirau whakaiti o te electrolyte. Ko te hanganga me te hanganga o te SEI e whakahaeretia ana e te hanganga o te electrolyte, arā, ko te taunekeneke moroiti i waenga i te whakarewa, te anion, me te Li+. Ka rerekē te hanganga o te electrolyte ehara i te mea ko te momo whakarewa me te tote lithium anake, engari ko te kukū o te tote hoki. I ngā tau tata nei, kua whakaatuhia e te electrolyte kukū-teitei (HCE) me te electrolyte kukū-teitei ā-rohe (LHCE) ngā painga ahurei ki te whakaū i ngā anode whakarewa lithium mā te hanga i tētahi SEI pumau. He iti te ōwehenga molar o te whakarewa ki te tote lithium (iti iho i te 2) ā, ka whakaurua ngā anion ki roto i te pūtu whakarewa tuatahi o Li+, ka hanga i ngā takirua katote whakapā (CIP) me te whakahiato (AGG) i roto i te HCE, i te LHCE rānei. Ko te hanganga o te SEI ka whakahaeretia i muri mai e ngā anion i roto i te HCE me te LHCE, e kiia nei ko te SEI i ahu mai i te anion. Ahakoa tōna mahi ātaahua ki te whakaū i ngā anode whakarewa lithium, kāore e ranea ngā SEI i ahu mai i te anion o nāianei ki te whakatutuki i ngā wero o ngā āhuatanga mahi. Nō reira, me whakapai ake te pumau me te ōritetanga o te SEI i ahu mai i te anion hei wikitoria i ngā wero i raro i ngā āhuatanga tūturu.
Ko ngā anion i te āhua o te CIP me te AGG ngā matū matua mō te SEI i ahu mai i te anion. I te nuinga o te wā, ka whakahaeretia ā-koretia te hanganga electrolyte o ngā anion e Li+, nā te mea he ngoikore te rohe o te utu pai o ngā ngota whakarewa me ngā ngota wairewa, ā, kāore e taea te taunekeneke tika ki ngā anion. Nō reira, e tino tumanakohia ana ngā rautaki hou mō te whakahaere i te hanganga o ngā electrolyte anionic mā te taunekeneke tika ki ngā anion.
Wā tuku: Whiringa-ā-rangi 22-2021