Vatsvakurudzi kubva kuTechnical University yeMunich(TUM) uyeRWTH Aachen UniversitymuGermany vakafananidza kushanda kwemagetsi e-high-energy sodium-ion batteries (SIBs) kune iyo yepamusoro-soro ye-high-energy lithium-ion battery (LIBs) ine lithium-iron-phosphate (LFP) cathode.

Chikwata ichi chakaona kuti mamiriro-yekuchaja uye tembiricha zvine simba repamusoro pakuramba kwepulse uye kusagadzikana kweSIBs kupfuura maLIBs, izvo zvinogona kukanganisa sarudzo dzekugadzira uye zvinopa pfungwa yekuti maSIB anogona kuda yakanyanya tembiricha uye machaji manejimendi masisitimu kuti agone kukwirisa mashandiro, kunyanya pamazinga akaderera echaji.

• Kuenderera mberi kutsanangura pulse resistance: izwi rinoreva kuti yakawanda sei bhatiri voltage inodonha kana kamwe kamwe kudiwa simba rikaiswa. Nokudaro, tsvakurudzo inoratidza kuti mabhatiri e-sodium-ion anonyanya kukanganiswa nehuwandu hwekuchajisa uye tembiricha kupfuura mabhatiri e-lithium-ion.

Tsvagiridzo:

"Mabhatiri e-sodium-ion [SIBs] anowanzoonekwa sekudonhedza-kutsiva maLIB," masayendisiti akadaro. "Kunyange zvakadaro, kusiyana kwemaitiro e electrochemical ye sodium uye lithium inoda kugadziriswa pane zvose anode uye cathode. Kunyange zvazvo mabhatiri e lithium-ion [LIBs] kazhinji graphite inoshandiswa seanode material, nokuti maSIBs hard carbon parizvino anoonekwa sechinhu chinonyanya kuvimbisa maSIBs."

Vakatsanangurawo kuti basa ravo rakanga rakagadzirirwa kuzadza gomba mukutsvakurudza, sezvo kuchine kushayikwa kweruzivo pamusoro pemafambiro emagetsi eSIB maererano nekushisa kwakasiyana-siyana uye mamiriro-ye-charges (SOCs).

Chikwata chekutsvagisa chakaita, kunyanya, zviyero zvekushanda kwemagetsi patembiricha kubva pa10 degrees C kusvika 45 degrees C uye yakavhurika-circuit voltage kuyerwa kwesero rakazara patembiricha dzakasiyana pamwe nehafu-sero kuyerwa kwemasero anoenderana pa25 C.

"Uyezve, takaongorora pesvedzero yetembiricha uye SOC pane ese ari maviri akananga kupokana (R DC) uye galvanostatic electrochemical impedance spectroscopy (GEIS)," akadaro. "Kuti tiongorore kugona kushandiswa, simba rinoshandisika, uye kushanda nesimba pasi pemamiriro ekuchinja, takaita bvunzo dzekugona nekushandisa mareti akasiyana emutoro patembiricha dzakasiyana."

Vatsvakurudzi vakayera lithium-ion bhatiri, sodium-ion bhatiri ine nickel-manganese-iron cathode, uye lithium-ion bhatiri ine LFP cathode. Vese vari vatatu vakaratidza voltage hysteresis, zvichireva kuti yavo yakavhurika-circuit voltage yaisiyana pakati pekuchaja nekuburitsa.

"Sezvineiwo, kune maSIBs, hysteresis iri kunyanya kuitika pamaSOCs akaderera, izvo, maererano nehafu-sero kuyerwa, zvichida nekuda kwekuoma kabhoni anode," vakasimbisa vadzidzisi. "R DC uye kusagadzikana kweLIB kunoratidza kutsamira kushoma paSOC. Mukupesana, kune maSIB, iyo R DC uye impedance inowedzera zvakanyanya paSOCs iri pasi pe30%, nepo maSOC epamusoro aine maitiro anopesana uye anotungamira kudzikira R DC uye impedance values."

Uyezve, vakazoona kuti tembiricha yeR_DC uye impedance yakakwira kumaSIB pane maLIB. "Miedzo yeLIB hairatidzi simba guru reSOC pakufamba-famba zvakanaka. Kusiyana neizvi, bhasikoro reSIBs kubva ku50% kusvika ku100% SOC inogona kuderedza kurasikirwa kwekushanda nehafu kana ichienzaniswa nebhasikoro kubva ku0% kusvika ku50%," vakatsanangura zvakare, vachicherechedza kuti kushanda kweSIBs inokura zvakanyanya kana ichienzaniswa nepamusoro yeSOC yakasiyana-siyana mumhando yepamusoro yeSOC.