Bafuputsi baUnivesithi ea Teknoloji ea Munich(TUM) leUnivesithi ea RWTH AachenJeremane e bapisitse ts'ebetso ea motlakase ea li-betri tsa sodium-ion (SIBs) tse nang le matla a phahameng a matla le betri ea lithium-ion (LIBs) ea morao-rao e nang le cathode ea lithium-iron-phosphate (LFP).

Sehlopha se fumane hore boemo ba boemo ba tefiso le mocheso li na le tšusumetso e phahameng ho pulse resistance le impedance ea SIBs ho feta LIBs, e ka 'nang ea susumetsa khetho ea moralo le ho fana ka maikutlo a hore li-SIB li ka hloka mekhoa e tsoetseng pele ea mocheso le tsamaiso ea litefiso ho ntlafatsa ts'ebetso, haholo-holo maemong a tlaase a tefiso.

• Ho hlalosa ho hanyetsa ho otla ha pelo ho ea pele: lentsoe lena le bolela hore na motlakase oa betri o theoha hakae ha ho hlokahala matla a tšohanyetso. Ka hona, lipatlisiso li bontša hore libeteri tsa sodium-ion li ameha haholo ke boemo ba tefiso le mocheso ho feta libeteri tsa lithium-ion.

Patlisiso:

"Libetri tsa sodium-ion [SIBs] hangata li nkuoa e le sebaka sa ho kenya li-LIB," bo-ramahlale ba boletse. Leha ho le joalo, liphapang tsa boitšoaro ba electrochemical ea sodium le lithium li hloka liphetoho ho anode le cathode.

Ba ile ba boela ba hlalosa hore mosebetsi oa bona o ne o reretsoe ho tlatsa lekhalo lipatlisisong, kaha ho ntse ho e-na le khaello ea tsebo mabapi le boitšoaro ba motlakase oa li-SIB mabapi le mocheso o fapaneng le maemo a lichelete (SOCs).

Sehlopha sa lipatlisiso se ile sa etsa, haholo-holo, litekanyo tsa ts'ebetso ea motlakase ho mocheso ho tloha ho likhato tse 10 ho isa ho tse 45 tsa C le litekanyo tsa motlakase o bulehileng oa sele e felletseng ka mocheso o fapaneng hammoho le litekanyo tsa halofo ea lisele tsa lisele tse tsamaellanang le 25 C.

"Ho feta moo, re ile ra batlisisa tšusumetso ea mocheso le SOC ho bobeli ba ho hanyetsa hona joale (R DC) le galvanostatic electrochemical impedance spectroscopy (GEIS)," e boletse. "Ho lekola bokhoni bo ka sebelisoang, matla a ka sebelisoang, le ts'ebeliso ea matla tlas'a maemo a matla, re entse liteko tsa bokhoni ka ho sebelisa litekanyetso tse fapaneng tsa mojaro ka mocheso o fapaneng."

Bafuputsi ba ile ba lekanya betri ea lithium-ion, betri ea sodium-ion e nang le cathode ea tšepe ea nickel-manganese, le betri ea lithium-ion e nang le cathode ea LFP. Ka boraro ba bona ba bonts'itse voltage hysteresis, ho bolelang hore motlakase oa bona o bulehileng o fapane pakeng tsa ho tjhaja le ho tjhaja.

"Ho khahlisang, bakeng sa li-SIB, hysteresis e etsahala haholo ho li-SOC tse tlase, e leng, ho latela litekanyo tsa lisele tsa halofo, mohlomong ka lebaka la anode e thata ea carbon," litsebi li ile tsa hatisa. "R DC le ts'oaetso ea LIB li bonts'a ho itšetleha hanyenyane haholo ho SOC. Ka lehlakoreng le leng, bakeng sa SIBs, R DC le impedance e eketseha haholo ho SOCs ka tlase ho 30%, ha li-SOC tse phahameng li na le phello e fapaneng 'me li lebisa ho theola R DC le litekanyetso tsa ho itšireletsa."

Ho feta moo, ba fumane hore mocheso o itšetlehileng ka R_DC le impedance e phahame ho li-SIB ho feta li-LIB. "Liteko tsa LIB ha li bontše tšusumetso e kholo ea SOC mabapi le katleho ea maeto a ho khutla." Ka lehlakoreng le leng, ho palama libaesekele ho tloha ho 50% ho ea ho 100% SOC ho ka fokotsa tahlehelo ea katleho ka nako e fetang halofo ho bapisoa le ho palama libaesekele ho tloha ho 0% ho ea ho 50%, "ba hlalosa hape, ba hlokomela hore katleho ea SIBs e ntse e hōla haholo ha ho bapisoa le mefuta e mengata ea SOC ha e bapisoa le mefuta e mengata ea SOC.