Synthesis and electrochemical behavior of K+ and Mn2+ co-doped LiFePO4/C as a cathode material for lithium-ion batteries and the mechanism of modification

Geng, Jing; Zou, Zhengguang; Wang, Tianxing; Zhang, Shuchao; Zhong, Shenglin; Ling, Wenqin; Peng, Xiaoxiao; Hu, Xixi

doi:10.1016/j.jelechem.2023.117275

Cited by 13 publications

(1 citation statement)

References 79 publications

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“…To enhance the performance of LFP, numerous researchers have proposed various approaches. For instance, surface coating LFP particles with conductive carbon − and doping them with ions − have been suggested. Coating LFP particles with conductive carbon not only enhances their electrical conductivity and enables high-rate discharge capabilities but also minimizes direct contact with the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

Xu,

Feng,

et al. 2024

Ind. Eng. Chem. Res.

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While the stable long-cycle performance of LiFePO 4 (LFP) cathodes holds significant promise for lithium-ion batteries (LiBs), their specific capacity and rate performance still fall short in market applications. In this study, we investigate surface modification of LFP using a cost-effective and highly conductive polyacrylonitrile (PAN)-induced carbon coating. Our findings indicate that 2 wt % of PAN can form a stable N−C layer on the surface of LFP particles, enhancing the Li + storage performance. Specifically, the initial discharge capacity reaches 153.9 mAh g −1 at 0.5 C, with LFP-2 maintaining 148.8 mAh g −1 after 150 cycles, significantly outperforming their counterparts LFP-0, LFP-1, and LFP-3. Under 1 C, the LFP-2 cathode exhibits an initial discharge specific capacity of 143.2 mAh g −1 and excellent cycle stability, retaining 84.32% of its capacity after 500 cycles. Additionally, LFP-2 demonstrates stable rate performance at 0.

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Section: Introductionmentioning

confidence: 99%

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

Xu,

Feng,

et al. 2024

Ind. Eng. Chem. Res.

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Interfacial Coupling‐Induced Pseudocapacitance in LiFePO₄@Polypyrrole Heterostructures Toward High‐Rate Lithium Storage

Xiao

Zhang

et al. 2023

Energy Tech

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The olivine‐structured LiFePO4 (LFP) materials are widely used as commercial cathodes due to its high thermal/chemical stability, long cycle life, low price, etc. However, the poor high‐rate performance severely hinders its high‐power applications due to intrinsically diffusion‐controlled lithium storage. Herein, an interfacial coupling‐induced pseudocapacitance (ICIPC) strategy to realize high‐rate capacity lithium storage of LiFePO4@ polypyrrole (LFP@PPY) is provided. The strong interfacial coupling interaction between LFP and polypyrrole (PPY) promotes interfacial pseudocapacitance as a major Li+ storage mechanism during the charge/discharge process at high rates. The dynamic combination of interfacial and diffusion lithium storage of electrodes can enhance reaction kinetics, the rate capability and cyclic performance. In addition, the nanoscale PPY coating layer effectively improves the surface conductivity of the LFP particles and the charge transfer kinetics of electrochemical reactions. Therefore, the LFP@PPY cathode exhibits remarkable rate capability with a capacity of 105 mAh g−1at 10 A g−1 and 84 mAh g−1 at 20 A g−1 and excellent cyclic stability performance with the initial capacity of 106.7 mAh g−1 at 10 C (91.2 mAh g−1 after 500 cycles). The ICIPC strategy may be extended to other cathodes (LiCoO2, etc.) to improve the high‐rate performance.

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Effective regeneration of waste LiFePO4 cathode material by Cu doping modification

Yao,

Zhang,

et al. 2024

Applied Surface Science

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Synthesis and electrochemical behavior of K+ and Mn2+ co-doped LiFePO4/C as a cathode material for lithium-ion batteries and the mechanism of modification

Cited by 13 publications

References 79 publications

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

Interfacial Coupling‐Induced Pseudocapacitance in LiFePO₄@Polypyrrole Heterostructures Toward High‐Rate Lithium Storage

Effective regeneration of waste LiFePO4 cathode material by Cu doping modification

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Synthesis and electrochemical behavior of K+ and Mn2+ co-doped LiFePO4/C as a cathode material for lithium-ion batteries and the mechanism of modification

Cited by 13 publications

References 79 publications

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO4 Cathode

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO4 Cathode

Interfacial Coupling‐Induced Pseudocapacitance in LiFePO4@Polypyrrole Heterostructures Toward High‐Rate Lithium Storage

Effective regeneration of waste LiFePO4 cathode material by Cu doping modification

Contact Info

Product

Resources

About

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

A Robust and Scalable N-Doped Carbon Coating Strategy for the High-Performance LiFePO₄ Cathode

Interfacial Coupling‐Induced Pseudocapacitance in LiFePO₄@Polypyrrole Heterostructures Toward High‐Rate Lithium Storage