Nitrogen-doped carbon stabilized LiFe0.5Mn0.5PO4/rGO cathode materials for high-power Li-ion batteries

Haifeng Yu; Zhaofeng Yang; Huawei Zhu; Hao Jiang; Chunzhong Li

doi:10.1016/j.cjche.2020.01.008

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Nitrogen-doped carbon stabilized LiFe_0.5Mn_0.5PO₄/rGO cathode materials for high-power Li-ion batteries

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Nitrogen-doped carbon stabilized LiFe_0.5Mn_0.5PO₄/rGO cathode materials for high-power Li-ion batteries
- Chinese Journal of Chemical Engineering Vol. 28, Issue 7, Pages: 1935-1940(2020)
- Affiliations：
  
  1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology,Shanghai,China,200237
  2. Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology,Shanghai,China,200237
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.01.008
  CLC：
- Published：2020
- Accepted：
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DOI：

Mn DOI： 10.1016/j.cjche.2020.01.008.

摘要

Abstract

Exploring high ion/electron conductive olivine-type transition metal phosphates is of vital significance to broaden their applicability in rapid-charging devices. Herein

we report an interface engineered LiFe

0.5

/rGO@C cathode material by the synergistic effects of rGO and polydopamine-derivedN-doped carbon. The well-distributed LiFe

0.5

nanoparticles are tightly anchored on rGO nanosheet benefited by the coating of N-doped carbon layer. The design of such an architecture can effectively suppress the agglomeration of nanoparticles with a shortened Li

transfer path. Meantime

the high-speed conducting network has been constructed by rGO and N-doped carbon

which exhibits the face-to-face contact with LiFe

0.5

nanoparticles

guaranteeing the rapid electron transfer. These profits endow the LiFe

0.5

/rGO@C hybrids with a fast charge-discharge ability

e.g

. a high reversible capacity of 105 mAh·g

-1

at 10 C

much higher than that of the LiFe

0.5

@C nanoparticles (46 mA·h·g

-1

). Furthermore

a 90.8% capacity retention can be obtained even after cycling 500 times at 2 C. This work gives a new avenue to fabricate transition metal phosphate with superior electrochemical performance for high-powerLi-ion batteries.

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