Synthesis of LiCr○xMn2-○x○O4 by Sol-Gel Assisted High Temperature Ball Milling

doi:10.12068/j.issn.1005-3026.2017.05.013

Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 671-675.DOI: 10.12068/j.issn.1005-3026.2017.05.013

• Materials & Metallurgy • Previous Articles Next Articles

Synthesis of LiCr_○xMn_2-○x○O₄ by Sol-Gel Assisted High Temperature Ball Milling

GENG Shu-dong^1,2， ZHAI Yu-chun¹

1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. School of Materials Science & Engineering， Jilin Institute of Chemical Technology， Jilin 132022， China.

Received:2016-05-30 Revised:2016-05-30 Online:2017-05-15 Published:2017-05-11
Contact: ZHAI Yu-chun
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Abstract

Abstract:

Spinel LiCr_○xMn_2-○x○O₄ cathode material was synthesized by sol-gel assisted high temperature ball milling method using LiOH·H₂O， Cr(CH₃COO)₃·6H₂O and Mn(CH₃COO)₂·4H₂O as raw materials . The crystal structure， surface morphology and charge-discharge performance of materials by doping different amounts of Cr were studied. The results show that the capacity retention rate of the material is greatly improved by Cr doping. The discharge capacity of the material decreases with the increasing doping amounts of Cr. The discharge specific capacity of LiCr_0.2Mn_1.8O₄ is lower than that of LiMn₂O₄. The charge-discharge performance of LiCr_0.05Mn_1.95O₄ is optimal and its initial discharge capacity is 119.6mAh/g and the discharge capacity retention rate is 97.4% after 40 cycles at a rate of 0.1. Furthermore， the discharge capacity retention rate is 96.3% after 100 cycles at various rates from 0.1 to 2.0.

Key words: lithium-ion battery, sol-gel, high temperature ball milling, Cr-doped, electrochemical properties

CLC Number:

TM911

GENG Shu-dong， ZHAI Yu-chun. Synthesis of LiCr_○xMn_2-○x○O₄ by Sol-Gel Assisted High Temperature Ball Milling[J]. Journal of Northeastern University:Natural Science, 2017, 38(5): 671-675.

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Synthesis of LiCr_○xMn_2-○x○O₄ by Sol-Gel Assisted High Temperature Ball Milling

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