• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Scalable synthesis of a novel structured graphite/silicon/pyrolyzed-carbon composite as anode material for high-performance lithium-ion batteries
【24h】

Scalable synthesis of a novel structured graphite/silicon/pyrolyzed-carbon composite as anode material for high-performance lithium-ion batteries

机译：新型结构化石墨/硅/热解碳复合材料的可扩展合成，作为高性能锂离子电池的负极材料

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel core-shell structured graphite/silicon@pyrolyzed-carbon (G/Si@C) composite was fabricated with a scalable and cost-effective method, including the processes of mechanical milling, spray drying, pitch coating and pyrolysis. The active silicon particles obtained by mechanical milling show an average size of 126 nm and exhibit a uniform dispersion on the skeleton consisting of graphite. The graphite provides sufficient electrical conductivity and mechanical strength for the G/Si@C composite, and the amorphous carbon coating layer is beneficial for buffering the volume change of Si and producing a stable SEI film. As a negative electrode material of lithium-ion battery, the synthesized G/Si@C composite has excellent structural stability and electrochemical performance. The G/Si@C composite with 15.7 wt % silicon shows a high reversible capacity of 637.7 mAh g(-1) with an initial efficiency of 77.9%, the capacity retention is 89.5% after 100 cycles. (C) 2016 Elsevier B.V. All rights reserved.
机译：采用一种可扩展且具有成本效益的方法，包括机械研磨，喷雾干燥，沥青涂覆和热解工艺，制备了一种新颖的核-壳结构石墨/硅热解碳（G / Si @ C）复合材料。通过机械研磨获得的活性硅颗粒的平均粒径为126 nm，并且在由石墨组成的骨架上显示出均匀的分散性。石墨为G / Si @ C复合材料提供了足够的导电性和机械强度，无定形碳涂层有利于缓冲Si的体积变化并产生稳定的SEI膜。合成的G / Si @ C复合材料作为锂离子电池的负极材料，具有优异的结构稳定性和电化学性能。具有15.7 wt％硅的G / Si @ C复合材料显示出637.7 mAh g（-1）的高可逆容量，初始效率为77.9％，经过100个循环后容量保持率为89.5％。 （C）2016 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号