Rapid thermal shock engineering of silicon/carbon hybrid anodes for high-capacity Li-ion batteriesOA
The development of high-capacity anode materials remains pivotal for advancing lithium-ion battery technologies.While silicon offers a much higher theoretical capacity than graphite(3579 vs.372 mAh g^(-1)),its severe volume expansion(>300%)during cycling induces rapid electrode degradation.Many improvement measures often have disadvantages such as high preparation cost and rapid performance degradation.To overcome this limitation,cost-effective silicon-carbon(Si/C)composites have been extensively explored as next-generation anode materials.Herein,we report a rapid thermal shock strategy(<10 s)to fabricate structurally optimized silicon-carbon(Si/C)composites that resolve this critical challenge.The Si/C-1000 anode,synthesized at 1000℃,achieves uniform dispersion of silicon nanoparticles(9.85 wt%,<50 nm)within a stress-buffering graphitic matrix through controlled vaporization-redeposition mechanisms.This architecture synergistically enhances interfacial stability and charge transfer kinetics,demonstrating exceptional electrochemical performance:586/636 mAh g^(-1)initial charge/discharge capacities at 0.1 C,92%initial Coulombic efficiency(ICE),outperforming most state-of-the-art Si/C systems.This work establishes a commercially viable pathway to harness silicon’s ultrahigh capacity through precision nanoscale engineering,addressing both fundamental and practical barriers in high-energy battery development.
Shuaining Li;Xiaoyu Chen;Liu Yang;Huai Guan;Jiangpeng Li;Yuming Zhang;Zhaohui Chen
State Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,China State Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,China State Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,ChinaState Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
信息技术与安全科学
Si anodeLithium-ion storageSi/C composite materialsThermal shock
《Resources Chemicals and Materials》 2026 (2)
P.23-31,9
supported by the Research Fund of State Key Laboratory of Mesoscience and Engineering(MESO-23-T03)the National Natural Science Foundation(22278423)the National Key Research and Development Program of China(2022YFB3805602)the Science Foundation of China University of Petroleum,Beijing(2462021QNXZ007).
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