Journal
ADVANCED POWDER TECHNOLOGY
Volume 30, Issue 8, Pages 1442-1449Publisher
ELSEVIER
DOI: 10.1016/j.apt.2019.04.017
Keywords
Lithium iron phosphate; GdPO4 and carbon; Ionic and electronic conductivity; Particle size and dispersibility
Categories
Funding
- National Natural Science Foundation of China [51202179]
- National Science and Technology Research Key Project of the Ministry of Education [212174]
- Shaanxi Province [2013KJXX-57, 2018GY-166]
- Natural Science Foundation of Xi'an [201805033YD11CG17 (7)]
- Science Foundation of Shaanxi Provincial Department of Education [12JS060, 13JS053, 14JS046, 14JS047, 14JS048, 18JS058, 16JS058]
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The electronic conductivity enhanced has been extensively studied and reported in lithium iron phosphate (LiFePO4). However, only few existing literatures are available for researchers to enhance simultaneously the ion and electronic conductivity of LiFePO4. Herein, we disclose that the LiFePO4 is co-coated with novel GdPO4 and Carbon via a hydrothermal-assisted solid-phase method, contributing to particle size and dispersibility. What surprising is that the ionic and electronic conductivity of the material is significantly enhanced, and the interfacial side reaction is effectively inhibited between the materials and the electrolytes. The diverse proportions of the mixed coating (LiFePO4/C& xGdPO(4) (x = 0, 1 wt%, 2 wt%, 3 wt%, 4 wt%)) are synthesized compared with bare LiFePO4. The experimental results suggest that LiFePO4/C& 0.03GdPO(4) exhibits the most excellent electrochemical performance. There is discharge capacity of 158, 148.8, 141.6, 134.9, 121.8, 104.9, and 86.7mAh/g at 0.1, 0.2, 0.5, 1, 2, 5, and 10 C rates, respectively. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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