Lithium iron phosphate (LFP) is attracting attention for its low cost, excellent stability, and eco-friendliness. However, LFP has a relatively low theoretical capacity, operating voltage, and low electrical conductivity. To improve the disadvantages of LFP, LFP carbon coating technology is essential. In this paper, a double carbon coating was performed on LFP using a mechanofusion process. The synthesized carbon coating LFP was structurally analyzed, and the electrochemical performance was evaluated by manufacturing a thick electrode. The optimized composition, LFP@C5, exhibited the lowest charge transfer resistance (423 Ω), excellent rate performance of 21.3 mAh g-1 at 5.0 C, and an improved capacity retention of 29.4 % after 100 cycles at 1.0 C. LFP@C5 has a continuous conductive network within the electrode that reduces electrode/electrolyte interfacial resistance and improves electrochemical performance in the thick film electrode. As a result, the mechanofusion-based dual carbon coating strategy enhances the cycling stability and high-rate performance of thick LFP electrodes.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
Availability of Data and Materials
Acknowledgement
References
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• 김운태(서울과학기술대학교 신소재공학과) | Un-Tae Kim (Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea)
• 조명훈(서울과학기술대학교 신소재공학과) | Myeong-Hun Jo (Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea)
• 안효진(서울과학기술대학교 신소재공학과) | Hyo-Jin Ahn (Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea) Corresponding author