Yiyi JIANG, Min SHEN, Banxia SONG, Nan LI, Xianghuan DING, Leyi GUO, Guoqiang MA. Effect of Dual-functional Electrolyte Additive on High Temperature and High Voltage Performance of Li-ion Battery [J]. Journal of Inorganic Materials, 2022, 37(7): 710
- Journal of Inorganic Materials
- Vol. 37, Issue 7, 710 (2022)
1. Schematic procedure for preparing the symmetric cell
2. LSV curves of (a) oxidation and (b) reduction of electrolytes with and without TVS
3. (a) Gas swelling rates and ACR change rates, (b) K values and capacity recovery rates, (c) charge and discharge curves of pouch cells with and without TVS in electrolytes after storage at 60 ℃ for 14 d
4. Cycling performance of pouch cells with and without TVS in electrolytes at 45 ℃
5. SEM images of cathodes from pouch cells (a) without and (b) with TVS in electrolytes after 100 cycles; (c) XPS spectra of cathodes from pouch cells without and with TVS in electrolytes after 10 cycles
S1. CV curves of NMC622 electrodes with and without TVS in electrolytes
S2. Cycling performance of pouch cells with and without TVS in electrolytes at 45 ℃
S3. SEM images of anodes from pouch cells (a) without and (b) with TVS in electrolytes after 100 cycles; (c) Si2p XPS spectra of anode from pouch cell with TVS in electrolyte after 10 cycles
S4. Working mechanism of TVS additive on cathode and anode of NCM622/graphite pouch cell
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Table 1. Uess fractions of Ni, Co and Mn ions deposited on anodes from pouch cell with and without TVS in electrolyte stored at cutoff potential of 4.4 V and temperature of 60 ℃ for 14 d
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Table 1. Gas composition and contents of pouch cells with and without TVS in electrolytes stored at cutoff potential of 4.4 V and temperature of 60 ℃ for 14 d
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Table 2. Fitted EIS results before and after 100 cycles of pouch full cells and corresponding symmetric cells with and without TVS in electrolytes
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