Abashakashatsi bo muriKaminuza y'Ubumenyingiro ya Munich(TUM) naKaminuza ya RWTH AachenMu Budage bagereranije imikorere y'amashanyarazi ya bateri za sodium-ion (SIBs) zifite ingufu nyinshi n'iya bateri ya lithium-ion igezweho ifite ingufu nyinshi (LIBs) ifite cathode ya lithium-iron-phosphate (LFP).

Itsinda ryasanze imiterere y’ubushyuhe n’ubushyuhe bigira ingaruka nyinshi ku kunanirwa k’umuvuduko w’amaraso no ku kunanirwa kwa SIB kurusha LIB, ibi bikaba bishobora kugira ingaruka ku mahitamo y’imiterere y’ibikoresho kandi bigaragaza ko SIB zishobora gukenera sisitemu zihambaye zo gucunga ubushyuhe n’ubushyuhe kugira ngo zirusheho kunoza imikorere, cyane cyane ku rwego rwo hasi rw’ubushyuhe.

• Kugira ngo dusobanure neza uburyo umuvuduko w'amaraso ugabanuka: iri jambo risobanura uburyo ingufu za batiri zigabanuka iyo habayeho gukenera ingufu mu buryo butunguranye. Kubwibyo, ubushakashatsi bwerekana ko batiri za sodium-ion zigira ingaruka cyane ku rugero rw'umuvuduko n'ubushyuhe kurusha batiri za lithium-ion.

Ubushakashatsi:

Abahanga bavuze bati: “Bateri za sodium-ion [SIB] muri rusange zifatwa nk’izisimbura LIB.” Nyamara, itandukaniro riri mu mikorere ya electrochemical ya sodium na lithium risaba impinduka kuri anode na cathode. Mu gihe kuri bateri za lithium-ion [LIB] ubusanzwe grafiti ikoreshwa nk’ibikoresho bya anode, kuri SIBs karubone ikomeye ubu ifatwa nk’ibikoresho byiza cyane kuri SIB.”

Banasobanuye ko akazi kabo kari gagamije kuziba icyuho mu bushakashatsi, kuko hakiri ubumenyi buke ku mikorere y’amashanyarazi ya SIBs mu bijyanye n’ubushyuhe butandukanye n’imiterere y’amashanyarazi (SOCs).

Itsinda ry’ubushakashatsi ryakoze, by’umwihariko, ibipimo by’imikorere y’amashanyarazi ku bushyuhe buri hagati ya dogere selisiyusi 10 na dogere selisiyusi 45 n’ibipimo by’amashanyarazi afunguye ku ngirabuzimafatizo zose ku bushyuhe butandukanye ndetse n’ibipimo by’igice cy’uturemangingo bihuye na two kuri dogere selisiyusi 25.

“Byongeye kandi, twakoze ubushakashatsi ku ngaruka z’ubushyuhe na SOC haba ku bushyuhe bw’umuyoboro w’amashanyarazi utaziguye (R DC) na electrochemical impedance spectroscopy (GEIS),” nk’uko byasobanuwe. “Kugira ngo dusuzume ubushobozi bukoreshwa, ingufu zikoreshwa, n’ubushobozi bw’ingufu mu bihe bihinduka, twakoze ibizamini by’ubushobozi bw’ingufu dukoresha ibipimo bitandukanye by’umutwaro ku bushyuhe butandukanye.”

Abashakashatsi bapimye bateri ya lithium-ion, bateri ya sodium-ion ifite cathode ya nickel-manganese-iron, na bateri ya lithium-ion ifite cathode ya LFP. Bose uko ari batatu bagaragaje hysteresis ya voltage, bivuze ko voltage yabo ifunguye itandukanye hagati yo gusharija no gusohora.

“Igishimishije ni uko kuri SIB, hysteresis igaragara cyane cyane kuri SOC nke, ibyo bikaba, hakurikijwe ibipimo bya kimwe cya kabiri cy’uturemangingo, bishoboka ko biterwa na anode ikomeye ya karubone,” abashakashatsi bashimangiye. “R DC na impedance ya LIB bigaragaza ko bidashingiye cyane kuri SOC. Mu buryo bunyuranye, kuri SIB, R DC na impedance byiyongera cyane kuri SOC ziri munsi ya 30%, mu gihe SOC nyinshi zigira ingaruka zitandukanye kandi bigatera kugabanuka kwa R DC na impedance.”

Byongeye kandi, basobanuye ko ubushyuhe bwa R_DC na impedance buri hejuru kuri SIBs kurusha LIBs. Bakomeje basobanura bati: “Ibipimo bya LIB ntibigaragaza ingaruka zikomeye za SOC ku mikorere myiza y’urugendo rwo kugaruka. Mu buryo bunyuranye, gutwara SIBs kuva kuri 50% kugeza 100% bya SOC bishobora kugabanya igihombo cy’imikorere ku kigero kirenga kimwe cya kabiri ugereranije no gutwara igare kuva kuri 0% kugeza 50%.”