Vatsvaguriri kubva kuYunivhesiti yeUnyanzvi yeMunich(TUM) uyeYunivhesiti yeRWTH AachenmuGermany vakaenzanisa mashandiro emagetsi emabhatiri e sodium-ion ane simba guru (SIBs) neaya ebhatiri re lithium-ion rine simba guru (LIBs) rine lithium-iron-phosphate (LFP) cathode.

Chikwata chakaona kuti mamiriro ekushanda kwemagetsi nekupisa zvine simba guru pakuramba kwemwoyo uye kupindira kweSIBs pane LIBs, izvo zvinogona kukanganisa sarudzo dzekugadzira uye zvinoratidza kuti SIBs dzingada masisitimu ekutonga tembiricha nechaja akanyanya kuomarara kuti dzivandudze mashandiro, kunyanya pamazinga echaja akaderera.

• Kuti titsanangure kuramba kwemwoyo: izwi iri rinoreva kuti bhatiri rinodzikira zvakadii kana simba rikatanga kudiwa. Saka, tsvakurudzo inoratidza kuti mabhatiri e sodium-ion anokanganiswa zvakanyanya nemazinga echaji nekupisa kupfuura mabhatiri e lithium-ion.

Tsvagiridzo:

"Mabhatiri eSodium-ion [SIBs] anowanzoonekwa seanotsiva maLIBs," masayendisiti akadaro. "Zvisinei, mutsauko uripo mumaitiro emagetsi esodium nelithium unoda kugadziriswa paanode necathode. Kunyange zvazvo mabhatiri eLithium-ion [LIBs] achiwanzo shandiswa graphite seanode, hard carbon yeSIBs parizvino inoonekwa sezvinhu zvinovimbisa zvikuru maSIBs."

Vakatsanangurawo kuti basa ravo raive rekuzadza mukaha uripo mukutsvagisa, sezvo kuchine kushaikwa kweruzivo nezvemaitiro emagetsi eSIBs maererano nekupisa kwakasiyana-siyana uye mamiriro ekunze (SOCs).

Chikwata chekutsvagisa chakaongorora, zvikuru, kuyerwa kwekushanda kwemagetsi patembiricha dzinobva pa10 degrees C kusvika 45 degrees C uye kuyerwa kwevoltage yemagetsi yakavhurika yemasero ese patembiricha dzakasiyana pamwe nekuyerwa kwehafu yemasero anoenderana nawo pa25 degrees C.

"Uyezve, takaongorora simba rekupisa uye SOC pakurwisa kwakananga kwemagetsi (R DC) uye galvanostatic electrochemical impedance spectroscopy (GEIS)," yakatsanangura. "Kuti tiongorore kugona kunoshandiswa, simba rinoshanda, uye kushanda zvakanaka kwesimba pasi pemamiriro ezvinhu anochinja-chinja, takaita bvunzo dzesimba remutero nekushandisa mwero wemutoro wakasiyana pakupisa kwakasiyana."

Vaongorori vakayera bhatiri re lithium-ion, bhatiri re sodium-ion rine nickel-manganese-iron cathode, uye bhatiri re lithium-ion rine LFP cathode. Vese vatatu vakaratidza voltage hysteresis, zvichireva kuti open-circuit voltage yavo yakasiyana pakati pekuchaja nekubudisa.

"Zvinofadza kuti, kune maSIB, hysteresis inonyanya kuitika pamaSOC akaderera, izvo, zvichienderana nekuyera kwehafu yemasero, zvichida nekuda kweanode yekabhoni yakaoma," nyanzvi dzakasimbisa. "R DC ne impedance yeLIB zvinoratidza kusavimba zvakanyanya neSOC. Kusiyana neizvi, kune maSIB, R DC ne impedance zvinowedzera zvakanyanya pamaSOC ari pasi pe30%, nepo maSOC akakwira aine mhedzisiro yakasiyana uye anotungamira kudzikira kweR DC ne impedance values."

Uyezve, vakaona kuti tembiricha inotsamira paR_DC ne impedance yakakwira kune maSIB kupfuura maLIB. "Miedzo yeLIB hairatidze simba guru reSOC pakushanda zvakanaka kwekudzoka nekudzoka. Kusiyana neizvi, kukwira bhasikoro reSIB kubva pa50% kusvika 100% SOC kunogona kuderedza kurasikirwa kwekushanda zvakanaka neanopfuura hafu zvichienzaniswa nekukwira bhasikoro kubva pa0% kusvika 50%," vakatsanangurazve, vachiona kuti kushanda zvakanaka kweSIBs kunokura zvakanyanya kana kukwira bhasikoro muSOC range yakakwira zvichienzaniswa neSOC range yakaderera.