• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced functional materials >High-Energy and Long-Lifespan Potassium–Sulfur Batteries Enabled by Concentrated Electrolyte
【24h】

High-Energy and Long-Lifespan Potassium–Sulfur Batteries Enabled by Concentrated Electrolyte

机译：High-Energy and Long-Lifespan Potassium–Sulfur Batteries Enabled by Concentrated Electrolyte

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

摘要

Potassium–sulfur (K–S) batteries are emerging as low-cost and high-capacityenergy-storage technology. However, conventional K–S batteries suffer fromtwo critical issues that have not yet been successfully resolved: the dissolutionof potassium polysulfides (KPS) into the liquid electrolyte and the formationof K dendrites on the K metal anode, which lead to inadequate cyclingefficiencies with a low reversible capacity. Herein, a high-capacity and longcycle-life K–S battery consisting of a highly concentrated electrolyte (HCE)(4.34 mol kg~（?1） potassium bis(fluorosulfonyl)imide in a 1,2-Dimethoxyethane)and a sulfurized polyacrylonitrile (SPAN) cathode is presented The applicationof a HCE efficiently suppresses the dendritic growth of K, as evidencedby operando optical imaging and phase field modeling, owing to the reducedK-ion depletion on the electrode surface and a uniform Faradaic currentdensity over the K metal anode surface. Additionally, because S is covalentlybonded to the C backbone of PAN in the SPAN structure, the SPAN cathodeinhibits the dissolution of KPS. These features generate synergy that the proposedK–S battery can provide a practical areal capacity of 2.5 mAh cm?2 andunprecedented lifetimes with high Coulombic efficiencies over 700 cycles.

著录项

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