• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Facile synthesis of selenium/potassium tartrate derived porous carbon composite as an advanced Li–Se battery cathode
【24h】

Facile synthesis of selenium/potassium tartrate derived porous carbon composite as an advanced Li–Se battery cathode

机译：硒/酒石酸钾衍生多孔碳复合材料的漂白合成作为先进的LI-SE电池阴极

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Porous carbon with a unique 3D structure has been prepared by the immediate carbonization of potassium tartrate. At an optimal carbonization temperature of 700 °C, the carbon mainly composed of micro- and small meso-porous structure has a Brunauer–Emmett–Teller (BET) specific surface area of 816.2 m ~(2) g ~(?1) , and the element Se with an amorphous structure is uniformly encapsulated into the porous structure of carbon. The weight ratio of Se in the composite can reach ～50%. As the Li–Se battery cathode, the composite shows a (2nd) reversible discharge capacity of 550.5 mA h g ~(?1) with an initial coulombic efficiency of 68.2% at 0.24C, and a discharge capacity of 485.3 mA h g ~(?1) can be retained after 80 cycles. Even at a high current density of 1.2C, the cell also delivers a stable discharge capacity of about 452.3 mA h g ~(?1) . The good electrochemical performances of the as-prepared composite may be attributed to high specific surface area and small porous size.
机译：通过Tartrate的直接碳化制备了具有独特3D结构的多孔碳。在700°C的最佳碳化温度下，碳主要由微型和小型中小型结构组成，具有Brunauer-emmett-exers（Bet）比表面积为816.2 m〜（2）g〜（？1），与非晶结构的元素Se均匀地包封成碳的多孔结构。复合材料中SE的重量比可以达到〜50％。作为Li-SE电池阴极，复合材料显示（2nd）可逆放电容量为550.5 mA Hg〜（α1），初始库仑效率为0.24℃，排出能力为485.3 ma hg〜（？ 1）80次循环后可以保留。即使在高电流密度为1.2℃，该电池也均可提供约452.3mA H g〜（α1）的稳定放电容量。 AS制备的复合材料的良好电化学性能可归因于高比表面积和小多孔尺寸。

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