期刊
ELECTROCHIMICA ACTA
卷 300, 期 -, 页码 18-25出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.01.057
关键词
LiFePO4; Carbon coating; Orange peel; Biomass; Flexible lithium polymer batteries
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [2017M1A2A2087577, 2018R1A4A1024691]
- Cheongju University
- National Research Foundation of Korea [2018R1A4A1024691, 2017M1A2A2087577] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study highlights the effects of a biomass-derived carbon coating on the properties of flexible lithium iron phosphate polymer batteries. Pure LiFePO4 (LFP) and carbon-coated LiFePO4 (C-LFP) cathode materials are synthesized by a modified mechanical activation process. LiFePO4 was uniformly coated with biomass-derived carbon by the addition of orange peel during the synthesis. C-LFP with a particle size of approximately 90 nm, having a homogeneous particle size distribution with particles smaller than that of pure LFP (140 nm), is obtained with 6.0 wt% carbon content. The electrochemical properties are evaluated at room temperature by cyclic voltammetry and charge-discharge performance analysis using porous carbon current collector with a lithium metal anode and gel polymer electrolyte that is prepared by the phase inversion method. C-LFP exhibits a high discharge capacity of 147.3 mAh g(-1) (corresponding to 87% of the theoretical capacity) at 0.5 C-rate and 139.8 mAh g(-1) at 1 C-rate. Good rate capability and stable cycle performance were realized for flexible lithium polymer cells employing the biomass derived-carbon coated LiFePO4. (C) 2019 Elsevier Ltd. All rights reserved.
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