Electrochemical Properties of Chitosan-Modified PbO2 as Positive Electrode for Lead-Acid Batteries

被引：7
作者：
Lu, Xia [1 ]
Chen, Zhen [1 ]
Yu, Qiang [1 ]
Zhu, Wei [1 ]
Li, Shuting [1 ]
Han, Lei [1 ]
Yuan, Jiali [1 ]
Li, Shutong [1 ]
Wu, Yize [1 ]
Lv, Ze [1 ]
Chen, Bangyao [1 ]
You, Hongjun [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Sci, Kunming 650093, Yunnan, Peoples R China
来源：
ENERGY TECHNOLOGY | 2022年 / 10卷 / 12期
基金：
中国国家自然科学基金;
关键词：
battery performance; chitosan; electrochemical performance-acid; lead-acid batteries; PbO2; PERFORMANCE; IMPROVEMENT; STORAGE; CARBON;
D O I：
10.1002/ente.202200910
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The structure and properties of the positive active material PbO2 are key factors affecting the performance of lead-acid batteries. To improve the cycle life and specific capacity of lead-acid batteries, a chitosan (CS)-modified PbO2-CS-F cathode material is prepared by electrodeposition in a lead methanesulfonate system. The microstructure and phase composition are characterized by scanning electron microscopy and X-ray diffraction. The electrochemical activity of the cathode material is analyzed by cyclic voltammetry, linear sweep voltammograms, electrochemical impedance spectroscopy, and scanning electrochemical microscopy. The battery performance of laboratory lead-acid batteries assembled with the cathode material is analyzed by a battery tester. The results show that the PbO2-CS-F cathode material has the smallest grain size (21.879 nm), the highest oxygen evolution potential (2.237 V), and the highest exchange current density (3.788 x 10(-7) A cm(-2)), smallest charge transfer resistance (5.359 omega cm(2)), and highest chemical activity in the series of PbO2 cathode materials. The laboratory lead-acid battery assembled from PbO2-CS-F cathode material exhibist the best battery performance, with the first discharge capacities of 4257 mAh and the discharge-specific capacity after 500 cycles is 196 mAh g(-1).
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页数：11
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