Nitrogen-Doped Carbon Coated WS2 Nanosheets as Anode for High-Performance Sodium-Ion Batteries

被引：25

作者：

Liu, Yong ^{[1
]}

Wei, Huijie ^{[1
]}

Wang, Chao ^{[1
,2
]}

Wang, Fei ^{[1
]}

Wang, Haichao ^{[1
]}

Zhang, Wanhong ^{[1
]}

Wang, Xianfu ^{[2
]}

Yan, Chenglin ^{[2
]}

Kim, Bok H. ^{[1
,3
]}

Ren, Fengzhang ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Collaborat Innovat Ctr Nonferrous Met Henan Prov, Sch Mat Sci & Engn, Key Lab Henan Prov Nonferrous Metall Mat Sci & Fa, Luoyang, Peoples R China

[2] Soochow Univ, Jiangsu Prov Key Lab Adv Carbon Mat & Wearable En, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Coll Phys Optoelect & Energy,Soochow Inst Energy, Suzhou, Peoples R China

[3] Chonbuk Natl Univ, Hydrogen & Fuel Cell Res Ctr, Div Adv Mat Engn, Jeonju, South Korea

来源：

FRONTIERS IN CHEMISTRY | 2018年 / 6卷

基金：

中国国家自然科学基金;

关键词：

tungsten disulfide; N-doped carbon; nanosheets; sodium ion batteries; electrochemical performances; LITHIUM-ION; FRAMEWORK;

D O I：

10.3389/fchem.2018.00236

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Due to the cost-effectiveness of sodium source, sodium-ion batteries (SIBs) have attracted considerable attention. However, SIBs still have some challenges in competing with lithium-ion batteries for practical applications. Particularly, the high rate capability and cycling stability are posing big problems for SIBs. Here, nitrogen-doped carbon-coated WS2 nanosheets (WS2/NC) were successfully synthesized by a high-temperature solution method, followed by carbonization of polypyrrole. When used as anode electrodes for SIBs, WS2/NC composite exhibited high-rate capacity at 386 and 238.1 mAh g(-1) at 50 and 2,000 mA g(-1), respectively. Furthermore, even after 400 cycle, the composite electrode could still deliver a capacity of similar to 180.1 mAh g(-1) at 1,000 mA g(-1), corresponding to a capacity loss of 0.09% per cycle. The excellent electrochemical performance could be attributed to the synergistic effect of the highly conductive nature of the nitrogen-doped carbon-coating and WS2 nanosheets. Results showed that the WS2/NC nanosheets are promising electrode materials for SIBs application.

引用

页数：9

共 42 条

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