Dual-functional SiOC:Achieving record 86% initial Coulombic efficiency in Li-ion batteries and dendrite-free Li metal anodes via (110)-textured depositionOA
Silicon oxycarbide(SiOC)holds promise as a high-capacity anode material for lithium-ion batteries,but its performance has been consistently limited by a low initial Coulombic efficiency(ICE).In this work,a carboncoated SiOC composite(C/SiOC)was synthesized via chemical vapor deposition(CVD),exhibiting a significantly increased proportion of reversible Si-O-C units(94.7%)and a reduced surface area(3.629 m^(2)·g^(−1)).As a result,the C/SiOC anode delivered stable cycling over 800 cycles and achieved a remarkably high ICE of 86%.Notably,the C/SiOC composite also served as an effective host for lithium metal deposition,reducing the nucleation overpotential to 1.7 mV and promoting(110)-textured Li growth,thereby suppressing dendritic formation.This synergistic functionality resulted in excellent long-term stability in half cells(780 cycles at 1.0 mA·cm^(-2)),symmetric cells(10,000 h at 1.0 mA·cm^(-2)),and full cells(800 cycles at 1.0 C),highlighting the strong potential of C/SiOC for advanced lithium-based battery systems,including anode-free architectures.
Junqian Miao;Jiangjiang Zhang;Yaran Liu;Wenwen Ma;Yang Ding;Shiqiang Cui
Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,School of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,ChinaHebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,School of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,ChinaHebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,School of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,ChinaHebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,School of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,ChinaEngineering Research Center for Semiconductor Integrated Technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,ChinaHebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,School of Sciences,Hebei University of Science and Technology,Shijiazhuang 050018,China
信息技术与安全科学
SiOCLi-ion batteryinitial Coulombic efficiencyLi metal battery
《Nano Research》 2026 (2)
P.470-480,11
supported by the Natural Science Foundation of Hebei Province(No.B2023208035)funded by Science Research Project of Hebei Education Department(No.QN2025055)supported by Beijing Zhongkebaice Technology Service Co.,Ltd。
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