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孙旭辉教授课题组与加拿大西安大略大学孙学良教授课题组合作在Journalof Materials Chemistry A上发表论文
发布时间:2017-11-30 11:14:17 点击:

题目:

Carbon Coated Bimetallic Sulfide Nanodots/Carbon Nanorod Heterostructure Enabling Long-life Lithium-ion Batteries


作者:

Xuejie Gao,a,‡ Jiwei Wang,b, ‡ Duo Zhang,c Keegan Adair,b Kun Feng,a Na Sun,a Hechuang Zheng,a Huiyun Shao,a Jun Zhong,a Yanyun Ma,a,* Xueliang(Andy) Sunb,* and Xuhui Suna,*


单位:

aInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nona Science and Technology, Soochow University, Suzhou 215123, China.

bDepartment of Mechanical and Material Engineering, University of Western Ontario, London, Ontario, N6A 5B8, Canada.

cSchool for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, China.


摘要:

Exploitation of high capacity and long-life anode materials is essential for the development of lithium-ion batteries(LIBs) with high energy density. An excellent candidate exists in metal sulfides, which has shown great potential as anode materials for LIBs due to their high theoretical specific capacity and excellent electronic properties. However, structural degradation during cycling and polysulfide dissolution has limited their practical application. In this work, we design a unique 0D/1D heterostructure of carbon coated iron-nickel sulfide nanodots/carbon nanorod through simultaneous decomposition and sulfidation of a bi-metal organic framework template. The resultant nanodots/nanorod heterostructure allows for fast ion/electron transport kinetics, suppresses the polysulfide dissolution and ensures the structural integrity during the lithiation/delithiation process. Consequently, this carbon coated iron-nickel sulfide nanodots/carbon nanorod structure exhibits a high specific capacity (851.3 mAh/g at 0.5 C after 200 cycles) and an excellent cycle stability (484.7 mAh/g after 1000 cycles at a high rate of 4 C).


影响因子:

8.867


分区情况:

一区


链接:

http://pubs.rsc.org/en/content/articlehtml/2017/ta/c7ta06849b


责任编辑:向丹



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