...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >A unique hierarchical structure: NiCo2O4 nanowire decorated NiO nanosheets as a carbon-free cathode for Li-O-2 battery
【24h】

A unique hierarchical structure: NiCo2O4 nanowire decorated NiO nanosheets as a carbon-free cathode for Li-O-2 battery

机译：一个独特的层次结构:NiCo2O4纳米线装饰NiO nanosheets无碳阴极对于Li-O-2电池

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

The development of high-performance cathodes is critical to promoting the development of Li-O-2 batteries. In this work, three-dimensional NiCo2O4 nanowire-decorated NiO nanosheets (NiO@NiCo2O4) on a Ni foam were fabricated by a two-step solvothermal process. The product exhibited efficient catalytic performance for Li-O-2 batteries. This three-dimensional NiO@NiCo2O4 hierarchical structures grown on Ni foam forms a porous catalytic surface for the uniform growth of discharge products. First, NiCo2O4 is a promising catalyst for improving the oxygen reduction reaction/oxygen evolution reaction (ORR/OER) processes for the Li-O-2 batteries. Second, NiO can provide a porous scaffold for the further deposition of NiCo2O4 nanowires to avoid their aggregation. Furthermore, NiO can promote the decomposition of by-products containing carbonate/carboxylate species. As a result, the Li-O-2 system with NiO@NiCo2O4 as a carbon-free cathode showed a maximum in-depth-specific discharge capacity of 9361.4 mA h g(-1) at a current density of 100 mA g(-1) and 176 cycles of stability under a limited capacity of 500 mA h g(-1) at a current density of 200 mA g(-1). The reported strategy regarding a multicomponent hierarchical structure may provide a new approach for effective electrocatalyst design for Li-O-2 batteries.
机译：高性能阴极的发展对促进Li-O-2的发展至关重要电池。NiCo2O4 nanowire-decorated NiO nanosheets(NiO@NiCo2O4)镍泡沫是捏造的两步solvothermal过程。表现出高效的催化性能Li-O-2电池。生长在倪NiO@NiCo2O4层次结构泡沫形成的多孔催化表面放电均匀增长的产品。为提高NiCo2O4是一种很有前途的催化剂氧还原反应/氧进化反应(奥尔/ OER) Li-O-2过程电池。脚手架的NiCo2O4进一步沉积纳米线,以避免他们的聚合。此外,NiO可以促进分解副产品含碳酸盐/羧酸盐物种。NiO@NiCo2O4无碳阴极显示最大in-depth-specific放电容量9361.4 mA h g(1)在100毫安的电流密度g(1)和176年稳定在一个有限的周期容量500毫安h g(1)电流密度马200 g(1)。一个多组分层次结构提供了一种有效的新方法electrocatalyst设计Li-O-2电池。

著录项

相似文献

  • 外文文献
  • 中文文献
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