期刊
SOLID STATE IONICS
卷 300, 期 -, 页码 18-25出版社
ELSEVIER
DOI: 10.1016/j.ssi.2016.11.026
关键词
LMO; Gadolinium doping; Cathode material; Lithium-ion battery applications
资金
- FEDER funds through the COMPETE Programme
- National Funds through FCT - Portuguese Foundation for Science and Technology under Strategic Funding [UID/FIS/04650/2013]
- FCT [SFRH/BD/90313/2012, SFRH/BPD/112547/2015, IF/01516/2013]
- FCT under the Indo-Portuguese program of cooperation in science and technology grant INT/Portugal [P-02/2013]
- Basque Government Industry Department under the ELKARTEK Program
- MHRD, Govt of India
- Fundação para a Ciência e a Tecnologia [SFRH/BD/90313/2012] Funding Source: FCT
LiMn2-xGdxO4 (x = 0.00, 0.01 and x = 0.04) spinel active material were prepared by sol-gel method. The morphology, crystal structure, thermal stability and electrochemical properties of the synthesized samples were evaluated. Gd-doping maintains the cubic spinel structure of LiMn2O4, leads to a decrease of the average particle size, and has a strong influence on the electrochemical properties of the cathodes. LiMn(2-x)G(x)O(4) cathode materials show two pairs of separated redox peaks, independently of the Gd-doping. After 40 charge-discharge cycles at C/2, the discharge capacity was 55.9 mAh.g(-1) and 33 mAh.g(-1) for x = 0.04 and x = 0, respectively, corresponding to a capacity retention of 80% and 70%, respectively. The Gd-doped with x = 0.04 showed improved cycling performance with respect to pristine LiMn2O4 due the smaller particle size and superior structural stability, showing its suitability for lithium-ion battery applications. (C) 2016 Elsevier B.V. All rights reserved.
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