Abashakashatsi bo muriKaminuza ya Tekinike ya Munich(TUM) naRWTH Aachen Universitymu Budage bagereranije imikorere y'amashanyarazi ya batiri ya sodium-ion ifite ingufu nyinshi (SIBs) n'iy'ubukorikori bugezweho bwa ingufu za lithium-ion (LIBs) na cathode ya lithium-fer-fosifate (LFP).

Iri tsinda ryasanze leta ishinzwe ubushyuhe n’ubushyuhe bigira uruhare runini ku kurwanya impiswi no kutagira SIBs kurusha LIBs, ibyo bikaba bishobora kugira ingaruka ku guhitamo ibishushanyo mbonera kandi bikerekana ko SIB zishobora gusaba ubushyuhe buhanitse ndetse n’uburyo bwo gucunga neza kugira ngo imikorere irusheho kuba myiza, cyane cyane ku rwego rwo hasi.

• Kugirango usobanure neza kurwanya pulse: ijambo ryerekeza kungene ingufu za bateri zigabanuka mugihe ingufu zitunguranye zikoreshwa. Kubwibyo, ubushakashatsi bwerekana ko bateri ya sodium-ion yibasiwe cyane nurwego rwubushyuhe hamwe nubushyuhe kuruta bateri ya lithium-ion.

Ubushakashatsi:

Abahanga mu bya siyansi bagize bati: “Bateri ya Sodium-ion [SIBs] muri rusange ifatwa nk'igitonyanga gisimbura LIBs.” Ati: "Nubwo bimeze bityo ariko, itandukaniro ryimyitwarire ya electrochemic ya sodium na lithium bisaba guhuza na anode ndetse na cathode. Mugihe kuri bateri ya lithium-ion [LIBs] ubusanzwe grafite ikoreshwa nkibikoresho bya anode, kuko SIBs karubone ikomeye kuri ubu bigaragara ko ari ibintu bitanga icyizere kuri SIBs."

Basobanuye kandi ko akazi kabo kagamije kuziba icyuho cy’ubushakashatsi, kubera ko hakiri ubumenyi buke ku myitwarire y’amashanyarazi ya SIBs bitewe n’ubushyuhe butandukanye ndetse n’ibisabwa na Leta (SOC).

Itsinda ry’ubushakashatsi ryakoze, cyane cyane, gupima imikorere y’amashanyarazi ku bushyuhe buri hagati ya dogere 10 C kugeza kuri dogere 45 C hamwe n’ipima ry’umuzunguruko wa voltage yuzuye ya selile yuzuye ku bushyuhe butandukanye kimwe no gupima igice cya selile ingirabuzimafatizo kuri 25 C.

Ryagira riti: "Byongeye kandi, twakoze ubushakashatsi ku kamaro k'ubushyuhe na SOC ku buryo butaziguye (R DC) ndetse na galvanostatike ya electrochemical impedance spectroscopy (GEIS)". Ati: "Kugira ngo dusuzume ubushobozi bushobora gukoreshwa, ingufu zikoreshwa, ndetse n'ingufu zikoreshwa mu bihe bigenda neza, twakoze ibizamini by'ubushobozi bwo gukoresha ibipimo dukoresha ibipimo bitandukanye ku bushyuhe butandukanye."

Abashakashatsi bapimye batiri ya lithium-ion, bateri ya sodium-ion hamwe na cathode ya nikel-manganese-fer, na batiri ya lithium-ion hamwe na cathode ya LFP. Bose uko ari batatu berekanye voltage hystereze, bivuze ko voltage yumuzunguruko itandukanye hagati yo kwishyuza no gusohora.

Abashakashatsi bashimangiye bati: "Igishimishije, kuri SIBs, hystereze igaragara cyane cyane kuri SOC nkeya, ibyo, ukurikije ibipimo bya selile, bishoboka ko biterwa na anode ikomeye ya karubone". "R DC n'imbogamizi za LIB byerekana ko bidashingiye cyane kuri SOC. Ibinyuranye na SIBs, R DC n'imbogamizi byiyongera cyane muri SOC munsi ya 30%, mu gihe SOC zo hejuru zifite ingaruka zinyuranye kandi biganisha kuri R DC no ku ndangagaciro."

Byongeye kandi, basanze ko ubushyuhe bushingiye kuri R_DC na impedance ari hejuru kuri SIBs kuruta LIBs. Bakomeje basobanura bati: "Ibizamini bya LIB ntabwo byerekana uruhare rukomeye rwa SOC ku rugendo-shuri. Ibinyuranye, gusiganwa ku magare SIB kuva kuri 50% kugeza ku 100% SOC birashobora kugabanya igihombo cyarenze kimwe cya kabiri ugereranije no gusiganwa ku magare kuva kuri 0% kugeza kuri 50%."