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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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The carbon fiber-supported SiO _( x ) (CF–SiO _( x ) ) composites are in situ fabricated using a facile two-step method and evaluated as anodes for lithium-ion batteries (LIBs). The CF–SiO _( x ) 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–SiO _( x ) are due to the modification of SiO _( x ) with the profiled carbon fibers, which effectively construct a continuous conducting network and thus enhance the electrochemical activity of SiO _( x ) . 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 SiO _( x ) volume changes on lithium insertion and extraction.
机译:碳纤维负载的SiO _(X)(CF-SiO _(X))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-SIO _(X)阳极在高电流充放电循环试验后,在50 mA G〜(α1)的可逆容量为1100 mA Hg〜(α1),其容量保留为80%(与前5个循环)。 CF-SiO _(X)的这种优异性能是由于具有成型碳纤维的SiO_(X)的改性,其有效构建连续导电网络,从而增强SiO_(x)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,并且对于锂插入和提取的大SiO_(x)体积变化的容纳纤维间空间足够的纤维间空间。

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