• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Preparation of reduced carbon-wrapped carbon- sulfur composite as cathode material of lithium- sulfur batteries
【24h】

Preparation of reduced carbon-wrapped carbon- sulfur composite as cathode material of lithium- sulfur batteries

机译：锂硫电池阴极材料的制备减少碳缠绕的碳硫复合材料

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

Sulfur is a promising cathode material for lithium-sulfur batteries as it possesses high theoretical specific capacity and low cost. In this work, the dispersion for sulfur and restriction for lithium polysulfides have been combined to improve the performance of lithium-sulfur batteries. Sulfur is dispersed on acetylene black particles at first and then reduced carbon coating wraps acetylene black-sulfur particles. The reduced carbon coating is fabricated by deoxidizing carbon precursor which is the product of reaction between sucrose and concentrated sulfuric acid. Morphology, structure and electrochemical properties of materials have been characterized and tested. Results show that sulfur envelops acetylene black particles and is uniformly dispersed in acetylene black-sulfur composite. A layer of deoxidized carbon coating wraps acetylene black-sulfur particles. The carbon-sulfur composite with deoxidized carbon electrode exhibits higher specific capacity and cycle stability in comparison with acetylene black-sulfur composite electrode. Besides, the carbon-sulfur composite with deoxidized carbon electrode displays high coulombic efficiency, which is attributed to the restriction for dissolution of lithium polysulfides through the deoxidized carbon coating.
机译：硫是用于锂 - 硫磺电池的有希望的阴极材料，因为它具有高理论特异性容量和低成本。在这项工作中，组合了用于锂多硫化物的硫化物和限制以改善锂 - 硫电池的性能。首先，硫在乙炔黑颗粒上分散在乙炔黑颗粒上，然后减少碳涂层包裹乙炔黑硫颗粒。通过脱氧碳前体制备了还原的碳涂层，其是蔗糖和浓硫酸之间的反应产物的产物。已经表征和测试了材料的形态，结构和电化学性质。结果表明，硫包括乙炔黑颗粒，均匀地分散在乙炔黑硫复合材料中。一层脱氧碳涂层包装乙炔黑硫颗粒。与乙炔黑硫复合电极相比，具有脱氧碳电极的碳 - 硫复合材料表现出更高的比力和循环稳定性。此外，具有脱氧碳电极的碳 - 硫复合材料显示出高的库仑效率，这归因于通过脱氧碳涂层溶解锂多硫化物的限制。

著录项

  • 来源
    《RSC Advances》 |2015年第114期|共11页
  • 作者

    Xuebing Yang; Wen Zhu; Guobao Cao;

  • 作者单位

    State Key Laboratory of Materials Processing and Die &

    Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China.;

    State Key Laboratory of Materials Processing and Die &

    Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China.;

    State Key Laboratory of Materials Processing and Die &

    Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China.;

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

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