Excellent electrochemical performance of LiFe0.4Mn0.6PO4 microspheres produced using a double carbon coating process

Yong Ping Huang; Tao Tao; Zheng Chen; Wei Han; Ying Wu; Chunjiang Kuang; Shaoxiong Zhou; Ying Chen

doi:10.1039/C4TA03994G

Excellent electrochemical performance of LiFe_0.4Mn_0.6PO₄ microspheres produced using a double carbon coating process†

Yong Ping Huang,^a Tao Tao,^b Zheng Chen,^a Wei Han,^c Ying Wu,^a Chunjiang Kuang,^a Shaoxiong Zhou^a and Ying Chen*^b

* Corresponding authors

^a China-Australia Energy Nanomaterials Joint Research Centre, Advance Technology & Materials Co., Ltd, China Iron & Steel Research Institute Group, Beijing 100081, P.R. China

^b Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia
E-mail: ian.chen@deakin.edu.au
Fax: +61 3 52271103
Tel: +61 3 52273243

^c China Iron & Steel Research Institute Group, Beijing 100081, P.R. China

Abstract

Composite LiFe_0.4Mn_0.6PO₄/C microspheres are considered advanced cathode materials for electric vehicles and other high-energy density applications due to their advantages of high energy density and excellent cycling stability. LiFe_0.4Mn_0.6PO₄/C microspheres have been produced using a double carbon coating process employing traditional industrial techniques (ball milling, spray-drying and annealing). The obtained LiFe_0.4Mn_0.6PO₄ microspheres exhibit a high discharge capacity of around 166 mA h g⁻¹ at 0.1 C and excellent rate capabilities of 132, 103, and 72 mA h g⁻¹ at 5, 10, and 20 C, respectively. A reversible capacity of about 152 mA h g⁻¹ after 500 cycles at a current density of 1 C indicates an outstanding cycling stability. The excellent electrochemical performance is attributed to the micrometer-sized spheres of double carbon-coated LiFe_0.4Mn_0.6PO₄ nanoparticles with improved electric conductivity and higher Li ion diffusion coefficients, ensuring full redox reactions of all nanoparticles. The results show that the advanced high-energy density cathode materials can be produced using existing industry techniques.

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Article information

DOI: https://doi.org/10.1039/C4TA03994G
Article type: Paper
Submitted: 04 Aug 2014
Accepted: 16 Sep 2014
First published: 17 Sep 2014

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J. Mater. Chem. A, 2014,2, 18831-18837

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Excellent electrochemical performance of LiFe_0.4Mn_0.6PO₄ microspheres produced using a double carbon coating process

Y. P. Huang, T. Tao, Z. Chen, W. Han, Y. Wu, C. Kuang, S. Zhou and Y. Chen, J. Mater. Chem. A, 2014, 2, 18831 DOI: 10.1039/C4TA03994G

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Journal of Materials Chemistry A