<trans-title xml:lang="en">Effect of Dual-functional Electrolyte Additive on High Temperature and High Voltage Performance of Li-ion Battery</trans-title>

Yiyi JIANG; Min SHEN; Banxia SONG; Nan LI; Xianghuan DING; Leyi GUO; Guoqiang MA

doi:10.15541/jim20210653

Journal of Inorganic Materials, Volume. 37, Issue 7, 710(2022)

Effect of Dual-functional Electrolyte Additive on High Temperature and High Voltage Performance of Li-ion Battery

Yiyi JIANG1... Min SHEN1, Banxia SONG1, Nan LI1, Xianghuan DING1, Leyi GUO2, and Guoqiang MA12,* |Show fewer author(s)

¹1. Key Laboratory of Lithium-ion Battery Materials, Zhejiang Research Institute of Chemical Industry Co., Ltd., Hangzhou 310012, China

²2. Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China

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Figures & Tables(12)

1. Schematic procedure for preparing the symmetric cell

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2. LSV curves of (a) oxidation and (b) reduction of electrolytes with and without TVS

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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

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4. Cycling performance of pouch cells with and without TVS in electrolytes at 45 ℃

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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

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S1. CV curves of NMC622 electrodes with and without TVS in electrolytes

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S2. Cycling performance of pouch cells with and without TVS in electrolytes at 45 ℃

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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

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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. 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
Sample Ni/(×10^-4, %) Co/(×10^-4, %) Mn/(×10^-4, %)
Base 90 21 130
TVS 35 4 69

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 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
Sample CO/µL CH₄/µL CO₂/µL C₂H₄/µL H₂/µL
Base 393.3 253.2 209.3 67.0 17.6
TVS 9.2 4.8 2.2 1.1 0.2

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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Table 2. Fitted EIS results before and after 100 cycles of pouch full cells and corresponding symmetric cells with and without TVS in electrolytes

Sample	Full cell			Anode symmetric cell			Cathode symmetric cell
Sample	R_s/mΩ	R_sei/mΩ	R_ct/mΩ	R_s/mΩ	R_sei/mΩ	R_ct/mΩ	R_s/mΩ	R_sei/mΩ	R_ct/mΩ
Base-before cycle	16.2	7.5	14.2	3.4	4.7	23.2	2.6	116.1	21.2
Base-after cycle	46.7	9.1	19.3	4.2	17.1	26.5	2.7	144.3	26.7
TVS-before cycle	16.4	8.9	25.8	4.5	20.5	43.3	2.1	86.1	18.2
TVS-after cycle	38.5	10.2	25.4	4.8	22.6	43.8	2.2	100.4	18.1

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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

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Paper Information

Category: RESEARCH ARTICLE

Received: Oct. 22, 2021

Accepted: --

Published Online: Jan. 10, 2023

The Author Email: MA Guoqiang (maguoqiang@sinochem.com)

DOI:10.15541/jim20210653

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

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

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

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

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

Table 2. Fitted EIS results before and after 100 cycles of pouch full cells and corresponding symmetric cells with and without TVS in electrolytes

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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