首页|Omni-functional simultaneous interfacial treatment for enhancing stability and outgassing suppression of lithium-ion batteries

Omni-functional simultaneous interfacial treatment for enhancing stability and outgassing suppression of lithium-ion batteries

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Ni-rich layered oxides in lithium-ion batteries have problems with gas generation and electrochemical performance reduction due to residual lithium's reaction on the surface with the electrolyte.To address this issue,in this study,the Acid solvent evaporation(ASE)method has been proposed as a potential method to remove residual lithium while promoting the formation of a new LiNO3-derived coating layer on the cathode surface.The reduction of residual lithium using the ASE method and the construction of a LiNO3-derived coating layer suppresses gas evolution caused by the side effects of the electrolyte,improves electrochemical performance,and improves thermal stability by facilitating the smooth move-ment of lithium ions.Furthermore,the structural stability and resistance change due to the LiNO3-derived coating layer effects is guaranteed through cycling and DCIR of the pouch cell.As a result,com-pared to Pristine,the capacity retention of coin cells increased by 8％after 100 cycles,and pouch cells increased by 25％after 160 cycles.In addition,after cycling the pouch cell,CO2 gas has significantly reduced by about 30％compared to Pristine using gas chromatography.The ASE method effectively forms a robust LiNO3-derived coating layer on the cathode active material,which helps minimize electrolyte reactivity,suppress CO2 emissions,enhance surface structure stability,improve thermal stability,and improve overall battery performance.

Lithium-ion batteriesNi-rich NCMAcid solvent evaporationLiNO3-derived coatingGas evolution

Youbean Lee、Chanjoo Park、Kyoungmin Min、Kwangjin Park

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Department of Mechanical Engineering,Gachon University,Gyeonggi-do 13120,Republic of Korea

School of Mechanical Engineering,Soongsil University,Seoul 06978,Republic of Korea

Department of Battery Engineering,Gachon University,Gyeonggi-do 13120,Republic of Korea

National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIP)SolarEdge Technologies Korea

2021R1F1A1055946GCU-202203070002

2024

10.1016/j.jechem.2024.03.012

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)