期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 607, 期 -, 页码 1457-1465出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.09.118
关键词
Carbon coating; High-rate; Lithium iron phosphate; Lithium ion battery; Mechanofusion; Super P (R)
资金
- Young Scholar Fellowship Program by Ministry of Science and Technology (MOST) in Taiwan [MOST 110-2636-E-027-002]
- Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors from The Featured Areas Research Center Program within the Ministry of Education (MOE) in Taiwan
Carbon coating can improve the electrical conductivity of lithium iron phosphate (LFP) as a promising cathode material for lithium ion batteries (LIB), with commercial organic binder Super P (R) (SP) being utilized for the first time to achieve uniform coating and enhance electrochemical performance.
Lithium iron phosphate (LFP) is one of the promising cathode materials of lithium ion battery (LIB), but poor electrical conductivity restricts its electrochemical performance. Carbon coating can improve electrical conductivity of LFP without changing its intrinsic property. Uniform coating of carbon on LFP is significant to avoid charge congregation and unpreferable redox reactions. It is the first time to apply the commercial organic binder, Super P (R) (SP), as carbon source to achieve uniform coating on LFP as cathode material of LIB. The simple and economical mechanofusion method is firstly applied to coat different amounts of SP on LFP. The LIB with the cathode material of optimized SP-coated LFP shows the highest capacity of 165.6 mAh/g at 0.1C and 59.8 mAh/g at 10C, indicating its high capacity and excellent high rate charge/discharge capability. SP is applied on other commercial LFP materials, M121 and M23, for carbon coating. Enhanced high-rate charge/discharge capabilities are also achieved for LIB with SP-coated M121 and M23 as cathode materials. This new material and technique for carbon coating is verified to be applicable on different LFP materials. This novel carbon coating method is expected to apply on other cathode materials of LIB with outstanding electrochemical performances. (C) 2021 Elsevier Inc. All rights reserved.
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