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In situ synthesis of carbon fiber-supported SiOx as anode materials for lithium ion batteries

机译:原位合成碳纤维支撑的SiOx作为锂离子电池的阳极材料

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摘要

The carbon fiber-supported SiOx (CF-SiOx) composites are in situ fabricated using a facile two-step method and evaluated as anodes for lithium-ion batteries (LIBs). The CF-SiOx anodes exhibit a reversible capacity of 1100 mA h g(-1) at 50 mA g(-1) after a high current charge-discharge cycling test with a capacity retention of 80% (compared with the first 5 cycles). This superior performance of the CF-SiOx are due to the modification of SiOx with the profiled carbon fibers, which effectively construct a continuous conducting network and thus enhance the electrochemical activity of SiOx. The profiled carbon fibers have numerous surface grooves to provide high contact area for rapid lithium-ion transport and enough inter-fiber space for the accommodation of large SiOx volume changes on lithium insertion and extraction.
机译:碳纤维负载的SiOx(CF-SiOx)复合材料原位使用容易的两步方法制造,并评估为锂离子电池(Libs)的阳极。 CF-SiOx阳极在高电流充放电循环试验后在50mA g(-1)下表现出1100mA H(-1)的可逆容量,其容量保持80%(与前5个循环相比)。 CF-SiOx的这种卓越性能是由于具有成型碳纤维的SiOx的改性,其有效构建连续导电网络,从而提高SiOx的电化学活性。 成型的碳纤维具有许多表面槽,以提供高锂离子传输的高接触面积,以及足够的纤维间空间用于锂插入和提取的大型SiOx体积变化。

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  • 来源
    《RSC Advances》 |2016年第39期|共6页
  • 作者单位

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymer Mat Shanghai 201620 Peoples R China;

    Donghua Univ Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymer Mat Shanghai 201620 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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