Controllable construction of flower-like FeS/Fe2O3 composite for lithium storage

JOURNAL OF POWER SOURCES

卷:392

Article

Wang, Jie^1,2  He, Huan¹  Wu, Zexing^1,6  Liang, Jianing¹  Han, Lili^3,4  Xin, Huolin L.^3,5  Guo, Xuyun²  Zhu, Ye²  Wang, Deli¹ 

[1] Huazhong Univ Sci & Technol, Hubei Key Lab Mat Chem & Serv Failure, Key Lab Mat Chem Energy Convers & Storage, Minist Educ,Sch Chem & Chem Engn, Wuhan, Hubei, Peoples R China

[2] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Tianjin Univ Technol, Inst New Energy Mat & Low Carbon Technol, TUT FE Joint Lab, Sch Mat Sci & Engn,Ctr Electron Microscopy, Tianjin 300384, Peoples R China

[5] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA

[6] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Base Ecochem Engn, Key Lab Sensor Anal Tumor Marker,Educ Minist, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China

关键词: Flower-like FeS/Fe2O3 composite;    Porous structure;    Synergistic performance;    Lithium storage;    Volume discharging/charging compatibility;   

DOI  :  10.1016/j.jpowsour.2018.04.107

来源: Elsevier

【 摘 要 】

Transitions metal sulfides/oxides have been considered as promising anode candidates for next generation lithium-ion batteries (LIBs) due to high theoretical capacities. However, the large volume change during lithiation/delithiation process and poor electronic conductivity often result in a poor charging/discharging performance. Herein, we design a flower-like FeS/Fe2O3 composite via a simple solvothermal-oxidation method, in which the Fe2O3 is most distributed on the surface of the flower. The unique porous structure and synergistic effect between FeS and Fe2O3 not only accommodate the large volume expansion, but also facilitate Li ion and electron transport. The Fe2O3 shell effectively reduce the dissolution of Li2Sx, during discharge/charge process. When serving as the anode material in lithium ion battery, FeS/Fe2O3 exhibits superior specific capacity, rate capacity and cycling stability compared with pure FeS and Fe2O3.

【 授权许可】

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