Based on N, F, and P co-doping biomass carbon to construct 3D porous carbon coated LiFePO4 for preparing lithium-ion batteries

•LFP-based carbon coated nanocomposite can remarkable improve the electrochemical performance of LIBs.•The conductivity and ion diffusion rate of LFP were improved through the construction of co-doped conductive carbon coating and the design of three-dimensional porous structure.•The rate performanc...

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Vydáno v:Journal of industrial and engineering chemistry (Seoul, Korea) Ročník 137; s. 376 - 386
Hlavní autoři: Liu, Jian, Wang, Shijie, He, Junfeng, Liang, Kang, Li, Jianbin, Huang, Xiaobing, Ren, Yurong
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 25.09.2024
한국공업화학회
Témata:
Carbon source
LiFePO4
Lithium-ion batteries
Porous structure
화학공학
Lithium-ion batteries
Porous structure
Carbon source
LiFePO4
ISSN:1226-086X, 1876-794X
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Shrnutí:•LFP-based carbon coated nanocomposite can remarkable improve the electrochemical performance of LIBs.•The conductivity and ion diffusion rate of LFP were improved through the construction of co-doped conductive carbon coating and the design of three-dimensional porous structure.•The rate performance and long cycle stability of LFP under 10C high current density are improved.•The electrochemical performance of full batteries has proved LFP good practical applications. Because of its superior structural stability, high level of safety, and low cost, the olivine-type LiFePO4 (LFP) is a prevailing cathode material in lithium-ion batteries. However, its development is constrained to inferior electronic conductivity and sluggish diffusion kinetic. In this work, a biomass carbon source derived from microbial residue was introduced to modify LiFePO4 (LFP@NFPC). LFP@NFPC composite with three-dimensional (3D) porous structure was synthesized via a facile wet ball milling and high-temperature calcination. Through well-designed experiment and feasible data analysis, a high conductive 3D network structure is constructed by N, F, and P co-doped carbon coating in the surface of LiFePO4, facilitating fast electron transport and rapid reaction kinetics bewteen intercrystalline. Meanwhile, the LFP@NFPC with three-dimensional (3D) porous structure can also improve the accessibility of Li+ over a protrcated cycle. The as-prepared LFP@NFPC shows discharge specific capacities of 168.2, 138.4, and 103.8 mAh/g at 1, 10, and 50C, respectively. Simultaneously, the LFP@NFPC||Graphite full battery indicates a specific capacity of 161.2 mAh/g at 1C, thus exhibiting superior rate capacity and outstanding cycle stability. This work provides a sustainable and economical approach to modify the cathode material of LIBs.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2024.03.023