Preparation and Characterization of Polyaniline Coated Lithium Zinc Titanate Anode Materials

doi:10.3969/j.issn.1672-6952.2022.01.001

Abstract

Abstract:

The Li₂ZnTi₃O₈@polyaniline (LZTO@PANI) composite materials were prepared by sol?gel and chemical oxidation polymerization methods using tetrabutyl titanate, zinc acetate, lithium acetate and aniline as raw materials. The materials were characterized and analyzed by X?ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscope (SEM) transmission electron microscope （TEM） and electrochemical testing. The results show that the polyaniline in the composite material has an amorphous structure and no impurities are introduced. When the coating amount of polyaniline is 5.3%, the discharge specific capacity is 330.0 (mA·h)/g at 0.1 A/g. In addition, after 100 cycles, the specific discharge capacity is 281.3 (mA·h)/g.

Key words: Lithium?ion battery, Anode material, Li₂ZnTi₃O₈, Polyaniline, Coating

摘要：

以钛酸四丁酯、乙酸锌、醋酸锂、苯胺为原料，通过溶胶?凝胶和化学氧化聚合的方法制备了钛酸锂锌/聚苯胺复合材料。利用X射线衍射（XRD）、红外光谱（IR）、扫描电子显微镜（SEM）、透射电镜（TEM）和电化学测试等手段对材料进行了表征及分析。结果表明，复合材料中的聚苯胺为无定型结构，且未引入杂质。当聚苯胺的质量分数为5.3%、电流密度为0.1 A/g时，首次放电比容量为330.0 (mA·h)/g；恒流充放电100圈后，仍然可保持281.3 (mA·h)/g的高放电比容量。

关键词: 锂离子电池, 负极材料, Li₂ZnTi₃O₈, 聚苯胺, 包覆

CLC Number:

O6.1

Rui Xun, Lijuan Wang. Preparation and Characterization of Polyaniline Coated Lithium Zinc Titanate Anode Materials[J]. Journal of Liaoning Petrochemical University, 2022, 42(1): 1-6.

荀瑞, 王利娟. 聚苯胺包覆钛酸锂锌负极材料的制备及表征[J]. 辽宁石油化工大学学报, 2022, 42(1): 1-6.

Figures/Tables 11

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