葡萄糖对溶胶凝胶法制备Li1.2Ni0.13Co0.13Mn0.54O2正极材料性能的影响

引用本文: 王力臻, 徐勇, 方华, 高海丽. 葡萄糖对溶胶凝胶法制备Li_1.2Ni_0.13Co_0.13Mn_0.54O₂正极材料性能的影响[J]. 无机化学学报, 2015, (5): 873-879. doi: 10.11862/CJIC.2015.140 shu

Citation: WANG Li-Zhen, XU Yong, FANG Hua, GAO Hai-Li. Effect of Glucose on the Performance of Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ Synthesized by Sol-Gel Method[J]. Chinese Journal of Inorganic Chemistry, 2015, (5): 873-879. doi: 10.11862/CJIC.2015.140 shu

葡萄糖对溶胶凝胶法制备Li_1.2Ni_0.13Co_0.13Mn_0.54O₂正极材料性能的影响

王力臻 ^{1,2,
,} ,
徐勇 ^1, ,
方华 ^1, ,
高海丽 ^1,

1.
1 郑州轻工业学院, 郑州 450002;
2.
2 河南省表界面重点实验室, 郑州 450002

通讯作者: 王力臻 wlz970618@zzuli.edu.cn

基金项目:
国家自然科学基金面上项目(No.21471135) (No.21471135)

河南省基础与前沿技术研究重点项目(No.112300413216)资助。 (No.112300413216)

摘要: 利用XRD、SEM、EDS、BET、激光粒度、循环伏安、恒流充放电、交流阻抗方法研究了葡萄糖为碳源对溶胶凝胶法制备Li_1.2Ni_0.13Co_0.13Mn_0.54O₂正极材料的结构、形貌以及电化学性能的影响。结果表明:与前驱体中未加入葡萄糖所制备的材料相比,掺葡萄糖后样品颗粒分布相对均匀,粒径变小,D₅₀从11.56减小至9.94μm,比表面积增加近1倍。经0.05C充放电活化后,未掺葡萄糖和掺葡萄糖样品0.2C放电比容量分别为183.4、211.6mAh·g^-1,2C容量分别为其0.2C的62.2%、77.6%。1C循环50次后放电比容量分别为133.3、173.6mAh·g^-1,容量保持率分别为95.1%、100%。掺葡萄糖可降低首次不可逆容量损失,提高材料的倍率性能与循环稳定性,减少电荷传递阻抗、Warburg阻抗以及双电层弥散效应,但不改变材料的晶型结构。

关键词:

锂离子电池;Li_1.2Ni_0.13Co_0.13Mn_0.54O₂;溶胶凝胶法;葡萄糖

English

Effect of Glucose on the Performance of Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ Synthesized by Sol-Gel Method

1.
1 Zhengzhou Institute of Light Industry, Zhengzhou 450002, China;
2.
2 Key Lab of Surface and Interface Science, Zhengzhou 450002, China

Corresponding author: 王力臻 wlz970618@zzuli.edu.cn

Received Date: 25 December 2014
Fund Project:
国家自然科学基金面上项目(No.21471135)

河南省基础与前沿技术研究重点项目(No.112300413216)资助。

Abstract: The cathode material Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ was synthesized by sol-gel method modified by glucose as carbon source. The structure, morphology and electrochemical performances of the as-prepared sample was studied by methods of XRD, SEM, EDS, BET, Laser Particle Size Analysis, cyclic voltammetry, galvanostatic charge-discharge and AC impedance. Test results showed that the distribution of particles became uniform and the sizes became smaller for the modification by glucose. The D₅₀ decreased from 11.56 to 9.94 μm. The specific surface area nearly doubled. The initial discharge specific capacity at 0.2C reached 183.4 mAh·g^-1 and 211.6 mAh·g^-1 after been activated by 0.05C for blank and compared groups, respectively. The capacity at 2C retained 62.2% and 77.6% of that at 0.2C for the two samples, respectively. After 50 cycles at 1C, the discharge specific capacities retained 133.3 mAh·g^-1 and 173.6 mAh·g^-1, and the capacity retention rates were 95.1% and 100% for the two samples, respectively. The initial irreversible capacity loss was reduced for the modification by glucose. The rate performance and cycle stability were obviously improved. The impedance of charge transfer and Warburg, and dispersion effect of the electric double layer were decreased. The crystal structure of the sample stayed unchanged.

Key words:

lithium ion battery;Li_1.2Ni_0.13Co_0.13Mn_0.54O₂;sol-gel method;glucose

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葡萄糖对溶胶凝胶法制备Li_1.2Ni_0.13Co_0.13Mn_0.54O₂正极材料性能的影响

通讯作者: 王力臻 wlz970618@zzuli.edu.cn

English

Effect of Glucose on the Performance of Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ Synthesized by Sol-Gel Method

Corresponding author: 王力臻 wlz970618@zzuli.edu.cn

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