(Lithium simbi anode) Interfacial chikamu chetsva anion-yakatorwa yakasimba electrolyte

Solid Electrolyte Interphase (SEI) inoshandiswa zvakanyanya kutsanangura chikamu chitsva chakaumbwa pakati peanode ne electrolyte mumabhatiri anoshanda.High simba density lithium (Li) mabhatiri esimbi anokanganiswa zvakanyanya ne dendritic lithium deposition inotungamirwa neasina-uniform SEI.Kunyange zvazvo ine zvikomborero zvakasiyana-siyana mukuvandudza kufanana kwe lithium deposition, mumabasa anoshanda, mhedzisiro yeanion-yakatorwa SEI haina kunaka.Munguva pfupi yapfuura, boka rekutsvagisa raZhang Qiang kubva kuYunivhesiti yeTsinghua rakaronga kushandisa anion receptors kugadzirisa chimiro che electrolyte kuvaka yakagadzikana inotorwa SEI.Iyo tris(pentafluorophenyl) borane anion receptor (TPFPB) ine maelectron-deficient boron atomu inopindirana ne bis(fluorosulfonimide) anion (FSI-) kuderedza kuderedza kugadzikana kweFSI-.Mukuwedzera, pamberi peTFPPB, rudzi rwemasumbu eion (AGG) eFSI- mu electrolyte yakashanduka, uye FSI- inopindirana neLi + yakawanda.Nokudaro, kuparara kweFSI- kunokurudzirwa kubudisa Li2S, uye kugadzikana kweanion-yakatorwa SEI inovandudzwa.

SEI inoumbwa nezvinoderedza decomposition zvigadzirwa zve electrolyte.Kuumbwa uye chimiro cheSEI chinonyanya kudzorwa nechimiro che electrolyte, ndiko kuti, kupindirana kwemicroscopic pakati pe solvent, anion, uye Li +.Chimiro che electrolyte chinoshanduka kwete chete nemhando ye solvent uye lithium munyu, asiwo nehuwandu hwemunyu.Mumakore achangopfuura, high-concentration electrolyte (HCE) uye localized high-concentration electrolyte (LHCE) vakaratidza zvakanakira kudzikamisa lithium metal anodes nekugadzira yakagadzikana SEI.Iyo molar ratio yekunyungudutsa kune lithium munyu yakaderera (isingasviki 2) uye anions inounzwa mune yekutanga solvation sheath yeLi +, ichigadzira contact ion pairs (CIP) uye aggregation (AGG) muHCE kana LHCE.Kuumbwa kweSEI kunozodzorwa neanions muHCE uye LHCE, inonzi anion-yakatorwa SEI.Pasinei nekuita kwayo kunoyevedza mukudzikamisa lithium metal anodes, ikozvino anion-yakatorwa SEIs haina kukwana mukusangana nematambudziko emamiriro anoshanda.Naizvozvo, zvinodikanwa kuti uwedzere kuvandudza kugadzikana uye kufanana kweanion-yakatorwa SEI kukunda matambudziko pasi pemamiriro chaiwo.

MaAnion ari muchimiro cheCIP neAGG ndiwo anotungamira eiyo anion-yakatorwa SEI.Kazhinji, iyo electrolyte chimiro cheanion chinodzorwa zvisina kunanga neLi +, nekuti iyo yakanaka charge ye solvent uye diluent molecules haina kusimba munzvimbo uye haigone kupindirana zvakananga nemaanioni.Nokudaro, mazano matsva ekugadzirisa maitiro eanionic electrolytes kuburikidza nekubatana zvakananga nemaanions anotarisirwa zvikuru.