材料科学
聚苯胺
介电谱
复合数
锂(药物)
傅里叶变换红外光谱
磺酸
扫描电子显微镜
化学工程
循环伏安法
锌
电池(电)
锂电池
核化学
复合材料
电化学
高分子化学
电极
化学
聚合物
冶金
有机化学
离子键合
内分泌学
聚合
量子力学
医学
物理
功率(物理)
工程类
物理化学
离子
作者
Zhihua Li,Yuting Shen,Yanbo Li,Feng Zheng,Lanlan Liu,Xiaqing Liu,Dehua Zou
标识
DOI:10.1177/0954008318756495
摘要
Polyaniline (PANI) hollow microspheres were synthesized by a self-assembly method in aqueous solution of poly (2-acrylamido-2-methylpropane sulfonic acid) (PAMPS), and then microspheric zinc (Zn) was introduced into PANI to prepare PANI hollow microspheres/Zn composite. The structure and morphology of as-synthesized samples were investigated by Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, and scanning electron microscopy, respectively. The charge/discharge property, cyclic voltammetry, and alternating current (AC) impedance spectroscopy of as-prepared samples were also examined in detail. The results showed that the electrical conductivity of PANI/Zn composite reached 21.2 ± 0.16 S/cm at 20 wt% of Zn, which was 11.4 S/cm higher than that of PANI. The first discharge capacity of PANI/Zn lithium battery reached 570.8 mAh/g at a current density of 0.2 mA/cm 2 . After 15 cycles, it remained at 159 mAh/g, which was 107 mAh/g higher than that of PANI lithium battery. Furthermore, the results of AC impedance test showed that the addition of Zn powders significantly reduced the internal resistance of battery. Compared with PANI, PANI/Zn composite showed greater capacity, higher conductivity, and charge/discharge efficiency, which was more suitable for the cathode material of high performance lithium battery.
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