Cabbage-like nitrogen-doped graphene/sulfur composite for lithium-sulfur batteries with enhanced rate performance

被引：30

作者：

Cui, Zhenqi ^{[1
]}

Mei, Tao ^{[1
]}

Yao, Jia ^{[1
]}

Hou, Baofei ^{[1
]}

Zhu, Xiang ^{[1
]}

Liu, Xinghang ^{[1
]}

Wang, Xianbao ^{[1
]}

机构：

[1] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Polymer Mat,Sch Mat Sci & Engn, Minist Educ,Key Lab Green Preparat & Applicat Fun, Wuhan 430062, Hubei, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 753卷

基金：

中国国家自然科学基金;

关键词：

Cabbage-like structure; Folds and gullies; Nitrogen-doped graphene; High rate; Lithium-sulfur batteries; CORE-SHELL STRUCTURE; CARBON COMPOSITES; CATHODE MATERIALS; S BATTERIES; OXIDE; IMMOBILIZER; SEPARATOR; PROSPECTS; NANOFIBER; PROGRESS;

D O I：

10.1016/j.jallcom.2018.04.234

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：

The cabbage-like nitrogen-doped graphene/sulfur composite (NG/S) was prepared in this work. This novel cabbage-like morphology has a three-dimensional connected structure with unique tiny ravines and thin folds, which can offset the defect of nonconductive sulfur species and store sulfur. Based on the new structure, the sulfur loading of NG/S is up to 74 wt% by thermogravimetric analysis. Electrochemistry tests indicate that the NG/S cathode delivers a discharge specific capacity of 1309 mAh g(-1) at 1 C (1 C = 1672 mAg(-1)), and the stable reversible capacity can be maintained at approximately 663 mAh g(-1) after 300 cycles at 1 C, together with the capacity decay of per cycle is only 0.02%. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：622 / 629

页数：8

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