Nickel-Iron Layered Double Hydroxide Hollow Polyhedrons as a Superior Sulfur Host for Lithium-Sulfur Batteries

被引：302

作者：

Zhang, Jintao ^{[2
]}

Li, Zhen ^{[2
]}

Chen, Ye ^{[1
]}

Gao, Shuyan ^{[1
]}

Lou, Xiong Wen ^{[2
]}

机构：

[1] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

[2] Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 34期

基金：

美国国家科学基金会;

关键词：

hollow polyhedrons; iron; layered double hydroxides; lithium-sulfur batteries; nickel; POLYSULFIDE MEDIATOR; PERFORMANCE; CATHODE; SHELL; TRAP;

D O I：

10.1002/anie.201805972

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：10944 / 10948

页数：5

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