期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 34, 页码 10944-10948出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201805972
关键词
hollow polyhedrons; iron; layered double hydroxides; lithium-sulfur batteries; nickel
资金
- Office of Naval Research Global (US) [N62909-17-1-2162, M4062262]
- National Science Foundation of China [21471048]
We have designed and synthesized novel hollow Ni/Fe layered double hydroxide (LDH) polyhedrons as an advanced sulfur host for enhancing the performance of lithium-sulfur (Li-S) batteries. The Ni/Fe LDH host shows multiple advantages. First, the Ni/Fe LDH shells can provide sufficient sulfiphilic sites for chemically bonding with polysulfides. Second, the hollow architecture can provide sufficient inner space for both loading a large amount of sulfur and accommodating its large volumetric expansion. Moreover, once the active material is confined within the host, the shells could easily restrict the outward diffusion of polysulfides, guaranteeing prolonged cycle life even with high sulfur loading. As a result, the S@Ni/Fe LDH cathode has successfully solved the main issues related to sulfur electrodes, and it exhibits significantly improved electrochemical performances with prolonged life over 1000cycles and excellent rate properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据