吉首大学学报(自然科学版)

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葡萄糖的添加对富锂锰基正极材料Li1.2Ni0.2Mn0.6O2的影响

王雷,向延鸿,廖启军,田林,吴贤文,吴显明,熊利芝,何则强   

  1. (1.吉首大学 物理与机电工程学院,湖南 吉首 416000;2.锰锌钒产业技术湖南省2011协同中心,湖南 吉首 416000;3.吉首大学 化学化工学院,湖南 吉首 416000;4.吉首大学 生物资源与环境科学学院 湖南 吉首 416000)
  • 出版日期:2019-05-25 发布日期:2019-06-04
  • 通讯作者: 向延鸿(1987—),女,湖南慈利人,吉首大学物理与机电工程学院讲师,博士,主要从事锂离子电池富锂锰基正极材料研究.邮箱:flmjtgyx@163.com.
  • 基金资助:

    国家自然科学基金资助项目( 51662010,51364009,51262008,51472107 和 51672104);湖南省教育厅优秀青年项目(16B209和15B190);湘西自治州基础理论研究项目(2018SF5016)吉首大学大学生研究性学习与创新实验计划;吉首大学校级理工科研究项目(JDX17040,JDX16008,JDX16009)

Effect of Glucose on Li1.2Ni0.2Mn0.6O2 Lithium-Rich Manganese Cathode Materials

WANG Lei,XIANG Yanhong,LIAO Qijun,TIAN Lin,WU Xianwen,WU Xianming,XIONG Lizhi,HE Zeqiang   

  1. (1.School of Physics and Mechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.Hunan 2011 Collaborative Center of Manganese,Zinc and Vanadium Industry Technology,Jishou 416000,Hunan China;3.School of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China;4. School of Biological Resources and Environmental Sciences,Jishou University,Jishou 416000,Hunan China)
  • Online:2019-05-25 Published:2019-06-04

摘要:

采用溶胶凝胶法制备合成富锂锰基正极材料Li1.2Ni0.2Mn0.6O2,在前期配制金属离子溶液时,通过添加不同量的葡萄糖(葡萄糖添加量分别为试剂总质量的0,6%,12%,36%,48%)来分析其对Li1.2Ni0.2Mn0.6O2的结构、形貌、电化学性能以及倍率性能的影响.恒流充放电测试结果显示,少量葡萄糖(6%,12%)加入,可以明显提高材料首次放电比容量.0.05C首次放电比容量由未加入葡萄糖材料的174 mAh/g提升至添加12%葡萄糖材料的265.9 mAh/g.倍率性能测试结果显示,葡萄糖的加入可以明显提高材料倍率性能.其中葡萄糖添加量为48%的材料倍率性能最好,首次放电比容量达到141 mAh/g,经过0.05C,0.1C,0.2C,0.5C,1C循环测试后再进行0.1C循环测试30次,放电比容量为110 mAh/g,容量保持率为78%.

关键词: Li1.2Ni0.2Mn0.6O2, 葡萄糖, 电化学性能, 倍率性能

Abstract:

The lithium-rich manganese cathode material Li1.2Ni0.2Mn0.6O2was prepared by sol-gel method.In the early stage of metalion solution preparation,the structure,morphology and electrochemistry of Li1.2Ni0.2Mn0.6O2were analyzed with addition of x=0,6%,12%,36%,48% glucose(x=glucose quality/metal reagent quality).Addition can significantly increase the material's initial discharge specific capacity.The initial discharge specific capacity of 0.05C increased from 174 mAh/g without added glucose material to 265.9 mAh/g with added glucose x=12%.The rate performance test results show that the addition of glucose can significantly improve the material rate performance.The material with added glucose x=48% has the best rate performance.The initial discharge specific capacity reached 141 mAh/g.After the cycle test of 0.05C,0.1C,0.2C,0.5C,and 1C,the recycling test was performed 30 times for 0.1C,the specific discharge capacity was 110 mAh/g,and the capacity retention rate was 78%.

Key words: Li1.2Ni0.2Mn0.6O2, glucose, electrochemical performance, magnification

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