首页|In-situ interfacial passivation and self-adaptability synergistically stabilizing all-solid-state lithium metal batteries

In-situ interfacial passivation and self-adaptability synergistically stabilizing all-solid-state lithium metal batteries

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The function of solid electrolytes and the composition of solid electrolyte interphase(SEI)are highly sig-nificant for inhibiting the growth of Li dendrites.Herein,we report an in-situ interfacial passivation com-bined with self-adaptability strategy to reinforce Li0.33La0.557TiO3(LLTO)-based solid-state batteries.Specifically,a functional SEI enriched with LiF/Li3PO4 is formed by in-situ electrochemical conversion,which is greatly beneficial to improving interface compatibility and enhancing ion transport.While the polarized dielectric BaTiO3-polyamic acid(BTO-PAA,BP)film greatly improves the Li-ion transport kinet-ics and homogenizes the Li deposition.As expected,the resulting electrolyte offers considerable ionic conductivity at room temperature(4.3 × 10-4 S cm-1)and appreciable electrochemical decomposition voltage(5.23 V)after electrochemical passivation.For Li-LiFePO4 batteries,it shows a high specific capac-ity of 153 mA h g-1 at 0.2 C after 100 cycles and a long-term durability of 115 mA h g-1 at 1.0 C after 800 cycles.Additionally,a stable Li plating/stripping can be achieved for more than 900 h at 0.5 mA cm-2.The stabilization mechanisms are elucidated by ex-situ XRD,ex-situ XPS,and ex-situ FTIR techniques,and the corresponding results reveal that the interfacial passivation combined with polarization effect is an effec-tive strategy for improving the electrochemical performance.The present study provides a deeper insight into the dynamic adjustment of electrode-electrolyte interfacial for solid-state lithium batteries.

Solid-state lithium batteriesComposite solid electrolyteIn-situ polymerizationInterfacial passivation layerSelf-adaptability

Huanhui Chen、Xing Cao、Moujie Huang、Xiangzhong Ren、Yubin Zhao、Liang Yu、Ya Liu、Liubiao Zhong、Yejun Qiu

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Shenzhen Engineering Lab of Flexible Transparent Conductive Films,School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,Guangdong,China

School of Resource and Environmental Sciences,Wuhan University,Wuhan 430072,Hubei,China

College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems,School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,Guangdong,China

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National Natural Science Foundation of ChinaShenzhen Bureau of Science,Technology and Innovation CommissionShenzhen Bureau of Science,Technology and Innovation Commission

51971080-GXWD20201230155427003-20200730151200003JSGG20200914113601003

2024

10.1016/j.jechem.2023.09.020

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)：2024.88(1)
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