Journal of the Chinese Ceramic Society, Volume. 52, Issue 10, 3327(2024)

Research Progress on Carbon Materials Modified SiOC Anodes in Lithium-Ion Batteries

ZHANG Junzhan1,2, HAN Qing1, CHEN Hongxia1, SHI Zongmo1,2, LIU Yongsheng3, LEI Wanying1, WEI Jian1,2, and ZHANG Ying1、*
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    Lithium-ion batteries are considered as the most promising chemical power source due to their high energy density, good safety, and environmental friendliness. As a key component of batteries, anode material plays an important role on the electrochemical performance. Graphite, Li4Ti5O12 and Si-based materials have attracted much attention as anode materials in lithium-ion batteries.Among these materials, graphite has good conductivity, small volume change, high initial coulombic efficiency, and low cost. As a conventional anode material for lithium-ion batteries, graphite is first commercially applied. However, its low theoretical capacity is the main factor restricting the development of high energy density lithium-ion batteries. Li4Ti5O12 anode material is considered to have a great development potential due to its stable structure during lithiation and delithiation processes and good safety. However, its low theoretical capacity and high cost restrict its practical application. Si has a high theoretical capacity, but it has a disadvantage of large volume expansion during lithiation and delithiation processes, resulting in the poor safety of batteries. The composite of Si and carbon materials is considered as an effective strategy for stabilizing electrodes.SiOC is considered as one of the high potential anode materials for lithium-ion batteries due to its excellent properties such as high theoretical specific capacity, good mechanical flexibility and structural stability, and facile structure regulation. However, the low conductivity of SiOC leads to its poor rate performance and cycling ability, thus restricting its development and application in the field of lithium-ion batteries. The composition of SiOC materials can be controlled through optimizing the composition, structure, and pyrolysis conditions of polymer precursors. Carbon material has high specific surface area, high mechanical stability, and excellent electrical conductivity. Composite with SiOC anode materials, the conductivity of SiOC can be improved, accelerating the transfer rate of lithium ions during lithiation and delithiation processes. Carbon material can act as an inert layer to reduce the volume effect of SiOC. SiOC/C composites can improve the conductivity effectively, thereby significantly improving the electrochemical performance of lithium-ion batteries as anode materials.For elucidating the structure of SiOC, this review analyzes the mechanism of lithium ions storage on SiOC anodes. To address the poor conductivity of SiOC, the composite process of graphite, carbon nanotubes, graphene and carbon nanofibers with SiOC anode materials are reviewed. The design of modification based on different carbon materials and between the anode microstructure and electrochemical performance are discussed. The selection of carbon materials is particularly important for the electrochemical performance of SiOC/C composites. Nanocarbon is beneficial to constructing conductive networks, and after composite with SiOC,there are many micro-/meso-pores inside, which enhances the capacitance effect and further improves the electrochemical performance. Therefore, the electrochemical performance of SiOC/nanocarbon composite materials is better than that of SiOC/traditional carbon composite materials. The rate capability and cycling stability of SiOC-based lithium-ions batteries are improved.

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    ZHANG Junzhan, HAN Qing, CHEN Hongxia, SHI Zongmo, LIU Yongsheng, LEI Wanying, WEI Jian, ZHANG Ying. Research Progress on Carbon Materials Modified SiOC Anodes in Lithium-Ion Batteries[J]. Journal of the Chinese Ceramic Society, 2024, 52(10): 3327

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    Paper Information

    Received: Apr. 12, 2024

    Accepted: --

    Published Online: Nov. 14, 2024

    The Author Email: Ying ZHANG (xayzhang@xauat.edu.cn)

    DOI:10.14062/j.issn.0454-5648.20240275

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