Nanodispersed iron, tin and antimony in vapour grown carbon fibres for lithium batteries: an EPR and electrochemical study
Nanodispersed iron, tin and antimony in vapour grown carbon fibres for lithium batteries: an EPR and electrochemical study
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用于锂电池的气相生长碳纤维中纳米分散的铁、锡和锑：EPR 和电化学研究
DOI：
10.1016/j.carbon.2004.04.023
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发表时间：
2004
期刊：
影响因子：
10.9
通讯作者：
C. Merino
中科院分区：
文献类型：
--
作者：
R. Alcántara;P. Lavela;G. Ortiz;J. Tirado;R. Stoyanova;E. Zhecheva;C. Merino
介绍了含铁、锡和锑的碳纤维作为先进锂离子电池负极的潜在候选材料。使用两种不同类型的纤维：非石墨和部分石墨化碳。EPR结果表明，在与锂的电化学反应中，碳和分散铁都参与了氧化还原过程。锂测试电池证明部分石墨化纤维的容量更高。加入分散的锡或锑，通过形成锂-锡和锂-锑化合物来提高非石墨纤维的容量。在含有锂合金元素的部分石墨化和复合电极中，可逆容量值均接近300 mAhg−1。本文提出在碳基体中使用纳米分散过渡金属，即铁，作为含有锂合金元素的碳复合材料的替代品。
The use of iron-, tin- and antimony-containing carbon fibres as potential candidates for the negatives electrode of advanced lithium-ion batteries is described. Two different types of fibres are used: non-graphitic and partially graphitized carbon. EPR results show that both carbon and dispersed iron participate in redox processes during the electrochemical reaction with Li. Lithium test cells evidence higher capacities for partially graphitized fibres. The addition of dispersed tin or antimony is used to improve the capacity of the non-graphitic fibres by formation of lithium-tin and lithium-antimony compounds. Reversible capacity values close to 300 mAhg−1are achieved in both partially graphitized and composite electrodes containing Li-alloying elements. The use of nanodispersed transition metals, i.e. iron, in a carbon matrix is proposed here as an alternative to carbon composites containing Li-alloying elements.