Journal
MATERIALS RESEARCH BULLETIN
Volume 66, Issue -, Pages 71-75Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2015.02.019
Keywords
LiFePO4; Carbothermal reduction method; In-situ X-ray diffraction; Bond valence approach; Electrochemical properties
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Funding
- National Research Foundation, Prime Minister's Office, Singapore [NRF-CRP 10-2012-6, NRF-CRP 8-2011-4]
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LiFePO4 was prepared using carbothermal reduction method. In-situ temperature dependent structural studies were carried using X-ray diffraction. Molecular dynamics simulations were conducted for the LiFePO4 using empirical potentials developed using bond valence approach to investigate the structural variations. Electrochemical behaviour of LiFePO4 was evaluated using cyclic voltammetry and galvanostatic cycling studies at room temperature. Charge-discharge cycling studies showed a reversible capacities 140 (+/- 5) mAh g(-1) at the end of 50th cycle and these capacity values were stable up to 400 cycles and almost nil capacity fade between 50 and 400 cycles, showing excellent capacity retention, low capacity fading. The cyclic voltammetry studies showed a main cathodic and anodic redox peaks at 3.34 and 3.5 V vs. Li, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
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