EQCM study of hydrated PbO2 content and its influence on cycling performance of lead-acid batteries. (February 2019)

• Record Type: Journal Article
• Authors: Wei, Jucai; Gu, Yueyuan; Guo, Zhigang; Deng, Chengzhi; Xie, Mengru; Li, Jindong; Xiong, Rui; Xue, Yawen; Wang, Li; Zhao, Haimin; Wu, Xu
• Is Part Of: Journal of energy storage. Volume 21(2019)
• Page Start: 706
• Page End: 712
• Publication Date: 2019-02
• Subjects: Electrochemical quartz crystal microbalance -- Lead dioxide -- Hydration -- Lead-acid battery; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2019.01.015
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: PbO2 electrodeposition was studied to tune the phase composition. The hydrated content of PbO2 with various α/β ratios were determined by EQCM. The relationship between α/β ratios of PbO2 and failure process was discussed. The PbO2 film electrodes with α/β≈1 exhibited 800 cycles stability. Abstract: In order to investigate the content of hydrated PbO2 and its influence on lead acid batteries cycle life performance, PbO2 films with four typical α -PbO2 / β -PbO2 ratios (pure α -PbO2, α -PbO2 / β -PbO2 = 0.3, α -PbO2 / β -PbO2 = 1, and pure β -PbO2 ) on gold or graphite substrates were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical quartz crystal microbalance. The effects of electrodeposition parameters on the morphologies and crystal phases of electrodeposited PbO2 samples were investigated. The hydrated PbO2 contents of the four samples were determined by electrochemical quartz crystal microbalance. The samples with α -PbO2 / β -PbO2 = 1 and 0.3 exhibited the smallest and the highest contents of hydrated PbO2 among the four samples. Samples with almost pure α -PbO2 and pure β -PbO2 exhibited similar amounts of hydrated PbO2 . The PbO2 film electrode with initial α -PbO2 / β -PbO2 = 1 was still stable after 750 cycles.