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(Lithium metal anode) Gawo lolumikizana ndi ma electrolyte olimba opangidwa ndi anion

Solid Electrolyte Interphase (SEI) imagwiritsidwa ntchito kwambiri pofotokoza gawo latsopano lomwe limapangidwa pakati pa anode ndi electrolyte pamabatire ogwira ntchito.Mabatire achitsulo amphamvu kwambiri a lithiamu (Li) amalepheretsedwa kwambiri ndi dendritic lithiamu deposition motsogozedwa ndi SEI yopanda yunifolomu.Ngakhale kuti ili ndi ubwino wapadera pakuwongolera kufanana kwa lifiyamu, muzogwiritsira ntchito, zotsatira za anion-derived SEI si zabwino.Posachedwapa, gulu lofufuza la Zhang Qiang kuchokera ku yunivesite ya Tsinghua linaganiza zogwiritsa ntchito ma anion receptors kuti asinthe mawonekedwe a electrolyte kuti apange SEI yokhazikika yochokera ku anion.The tris(pentafluorophenyl)borane anion receptor (TPFPB) yokhala ndi ma atomu a boron omwe alibe ma elekitironi amalumikizana ndi bis(fluorosulfonimide) anion (FSI-) kuti achepetse kukhazikika kwa FSI-.Kuonjezera apo, pamaso pa TFPPB, mtundu wa magulu a ion (AGG) wa FSI- mu electrolyte wasintha, ndipo FSI- imagwirizana ndi Li + zambiri.Choncho, kuwonongeka kwa FSI- kumalimbikitsidwa kuti apange Li2S, ndipo kukhazikika kwa SEI yochokera ku anion kumatheka.

SEI imapangidwa ndi zinthu zochepetsera zowonongeka za electrolyte.Mapangidwe ndi mawonekedwe a SEI amayendetsedwa makamaka ndi kapangidwe ka electrolyte, ndiko kuti, kulumikizana kwapang'onopang'ono pakati pa zosungunulira, anion, ndi Li +.Mapangidwe a electrolyte amasintha osati ndi mtundu wa zosungunulira ndi mchere wa lithiamu, komanso ndi mchere wambiri.M'zaka zaposachedwapa, high-concentration electrolyte (HCE) ndi localized high-concentration electrolyte (LHCE) zasonyeza ubwino wapadera pa kukhazikika lithiamu zitsulo anodes popanga khola SEI.The molar chiŵerengero cha zosungunulira kuti mchere lithiamu ndi otsika (zosakwana 2) ndi anions anadzetsa woyamba solvation m'chimake wa Li +, kupanga kukhudzana ion awiriawiri (CIP) ndi aggregation (AGG) mu HCE kapena LHCE.Kupangidwa kwa SEI kumayendetsedwa ndi anions mu HCE ndi LHCE, yomwe imatchedwa SEI yotengedwa ndi anion.Ngakhale kuti ntchito yake yokongola pakukhazikika kwa lithiamu zitsulo anode, ma SEI omwe amachokera ku anion amakono sakwanira kuthana ndi zovuta zazochitika.Choncho, m'pofunika kupititsa patsogolo kukhazikika ndi kufanana kwa SEI yochokera ku anion kuti tithane ndi zovuta zomwe zili zenizeni.

Anion mu mawonekedwe a CIP ndi AGG ndizomwe zimatsogolera ku SEI yochokera ku anion.Nthawi zambiri, mawonekedwe a electrolyte a anions amayendetsedwa molakwika ndi Li +, chifukwa mtengo wabwino wa mamolekyu osungunulira ndi osungunuka ndi ofooka ndipo sungathe kulumikizana mwachindunji ndi anions.Choncho, njira zatsopano zoyendetsera mapangidwe a anionic electrolytes mwa kuyanjana mwachindunji ndi anions akuyembekezeredwa kwambiri.


Nthawi yotumiza: Nov-22-2021