• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Designing a High-Performance Lithium Sulfur Batteries Based on Layered Double Hydroxides Carbon Nanotubes Composite Cathode and a Dual-Functional Graphene-Polypropylene-Al2O3 Separator
【24h】

Designing a High-Performance Lithium Sulfur Batteries Based on Layered Double Hydroxides Carbon Nanotubes Composite Cathode and a Dual-Functional Graphene-Polypropylene-Al2O3 Separator

机译：基于层状双氢氧化物碳纳米管复合阴极和双功能石墨烯-聚丙烯-Al2O3隔板的高性能锂硫电池设计

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

Designing an optimum cell configuration that can deliver high capacity, fast charge-discharge capability, and good cycle retention is imperative for developing a high-performance lithium-sulfur battery. Herein, a novel lithium-sulfur cell design is proposed, which consists of sulfur and magnesium-aluminum-layered double hydroxides (MgAl-LDH)-carbon nanotubes (CNTs) composite cathode with a modified polymer separator produced by dual side coating approaches (one side: graphene and the other side: aluminum oxides). The composite cathode functions as a combined electrocatalyst and polysulfide scavenger, greatly improving the reaction kinetics and stabilizing the Coulombic efficiency upon cycling. The modified separator enhances further Lit-ion or electron transport and prevents undesirable contact between the cathode and dendritic lithium on the anode. The proposed lithium-sulfur cell fabricated with the as-prepared composite cathode and modified separator exhibits a high initial discharge capacity of 1375 mA h g(-1) at 0.1 C rate, excellent cycling stability during 200 cycles at 1 C rate, and superior rate capability up to 5 C rate, even with high sulfur loading of 4.0 mg cm(-2). In addition, the findings that found in postmortem chracterization of cathode, separator, and Li metal anode from cycled cell help in identifying the reason for its subsequent degradation upon cycling in Li-S cells.
机译：设计能够提供高容量，快速充放电能力和良好循环保持性的最佳电池配置对于开发高性能锂硫电池至关重要。本文提出了一种新颖的锂硫电池设计，该设计由硫和镁铝层的双氢氧化物（MgAl-LDH）-碳纳米管（CNTs）复合阴极组成，该阴极具有通过双面涂覆方法生产的改性聚合物隔板（一个面：石墨烯，另一面：氧化铝）。复合阴极起着电催化剂和多硫化物清除剂的作用，大大提高了反应动力学，并在循环时稳定了库仑效率。改进的隔板进一步增强了锂离子或电子的传输，并防止了阴极与阳极上的树枝状锂之间的不良接触。所提议的由已制备的复合阴极和改性隔膜制造的锂硫电池在0.1 C速率下显示出1375 mA hg（-1）的高初始放电容量，在1 C速率下200次循环中具有出色的循环稳定性，并且具有优异的速率即使在4.0 mg cm（-2）的高硫负荷下，也能以最高5 C的速度运行。另外，从循环电池中对阴极，隔板和锂金属阳极进行尸检后发现的发现有助于确定其随后在Li-S电池中循环降解的原因。

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