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锂离子电池Sn基薄膜负极材料的研究进展 被引量:3

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摘要 薄膜锂离子电池作为各种微电子系统的首选电源被广泛研究.本文系统综述了近年来锂离子电池Sn基薄膜负极材料的研究进展,着重介绍纯Sn薄膜、Sn基合金和Sn基氧化物薄膜的制备与性能.纯Sn薄膜具有高的可逆容量,但其嵌锂/脱锂过程的巨大体积变化导致循环性能很差,而且纯Sn薄膜的制备方法及其与电解液的界面特性对电极容量衰减有很大的影响.将Sn与非活性过渡金属复合,虽可有效提高电极循环性能,但同时带来容量的损失;Sn与活性成分形成的纳米晶多相复合薄膜负极可在保持高容量的同时,获得良好的循环性能.与纯Sn薄膜负极相比,Sn基氧化物薄膜存在纳米Sn相原位生成的过程,因此具有较好的循环稳定性,但其首次不可逆容量大.已有的研究进展充分说明,微纳组织调控能够显著改善上述薄膜电极的性能.分析和总结现有Sn基薄膜负极材料的微观结构和性能之间关系的研究进展,多相多尺度结构调控应是进一步提高Sn基合金薄膜负极的容量和循环稳定性的重要途径.
出处 《科学通报》 EI CAS CSCD 北大核心 2012年第27期2587-2598,共12页 Chinese Science Bulletin
基金 国家自然科学基金(50971060) 中央高校基本科研业务费(2012ZM0001)资助
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