Propelling polysulfides transformation for high-rate and long-life lithiumsulfur batteries

被引：369

作者：

Zheng, Cheng ^{[1
,2
,3
]}

Niu, Shuzhang ^{[1
,2
]}

Lv, Wei ^{[1
,2
]}

Zhou, Guangmin ^{[4
]}

Li, Jia ^{[1
,2
]}

Fan, Shaoxun ^{[1
,2
]}

Deng, Yaqian ^{[1
,2
]}

Pan, Zhengze ^{[1
,2
]}

Li, Baohua ^{[1
,2
]}

Kang, Feiyu ^{[1
,2
]}

Yang, Quan-Hong ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Grad Sch Shenzhen, Engn Lab Functionalized Carbon Mat, Shenzhen 518055, Peoples R China

[2] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen Key Lab Graphene Based Mat, Shenzhen 518055, Peoples R China

[3] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China

[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

NANO ENERGY | 2017年 / 33卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Lithium-sulfur batteries; 3D alpha-Fe2O3/graphene hybrid; Redox reaction; Polysulfides transformation; SULFUR BATTERIES; GRAPHENE; PERFORMANCE; COMPOSITES; SHUTTLE; LAYERS; REDOX; ANODE; OXIDE;

D O I：

10.1016/j.nanoen.2017.01.040

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A three-dimensional (3D) hierarchical porous graphene macrostructure coupled with uniformly distributed alpha-Fe2O3 nano-particles (denoted Fe-PGM) was designed as a sulfur host in a lithium- sulfur battery, and was prepared by a hydrothermal method. In this hybrid structure, the alpha-Fe2O3 nano-particles are proved to not only strongly interact with the polysulfides, but more importantly, chemically promote their transformation to insoluble species during the charge/discharge process, working as chemical barriers for the shuttling of the lithium polysulfides (LiPSs). Therefore, together with 3D hierarchical porous structure facilitating fast electron/ion transfer, Fe-PGM as a sulfur host in a cathode contributes to a high rate performance (565 mAh g(-1) at a high rate of 5 C relative to 1571 mAh g(-1) at 0.3 C) as well as long cyclic stability (an ultralow capacity fading rate of 0.049% per cycle over 1000 cycles at the high current rate of 5 C).

引用

页码：306 / 312

页数：7

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