Journal
MATERIALS LETTERS
Volume 198, Issue -, Pages 172-175Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.04.008
Keywords
Nanocomposites; Electrical properties; Energy storage and conversion; Lithium-ion batteries
Funding
- National Natural Science Foundation of China [61504168, 21663029, 11563008]
- Urumqi Science and Technology Plan [P151010005]
- West Light Foundation of the Chinese Academy of Sciences [XBBS-2014-04]
- Thousand Youth Talents Plan [Y42H831301]
- Foundation of Director of Xinjiang Technical Institute of Physics Chemistry
- Chinese Academy of Sciences, China [2015RC010]
- One-Thousand-Talents Scheme in Sichuan Province, Hebei outstanding young scholars, Science and Technology Program of Hebei Province [D2016403064, 1521112]
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LiFePO(4.)xLi(3)V(2)(PO4)(3) (LFP.xLVP, x = 0, 0.05, 0.1, 0.15, 0.2) composites were prepared by the two-step solid-state method. The structure, morphology and electrochemical properties were characterized by X-ray diffraction, scanning electron microscope, cyclic voltammetry, charge-discharge performance test and electrochemical impedance spectroscopy. It was indicated that composites were presented rough in surface of ball-like particles. Two phase of LFP and LVP combination improved electrochemical properties of LFP. The LFP.0.1LVP has the highest discharge capacity of 154 mAh/g at 0.2 C. Compared with LFP, the rate performance of the LFP.0.1LVP increased 13% and 8% at 1 C and 10 C after five cycles. It possessed excellent cycle life of 99.8% after 100 cycles at 1 C especially. The all preparation process without any solvent addition was easy operation, energy saving and environmentally friendly. (C) 2017 Elsevier B.V. All rights reserved.
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