Towards renewable energy storage: Understanding the roles of rice husk-based hierarchical porous carbon in the negative electrode of lead-carbon battery

Schematic diagram The roles of RHHPC with hierarchical pores in the negative electrode of lead-carbon battery. [Display omitted] •RHHPC is investigated as additives of lead-carbon electrodes.•RHHPC provides high electrochemically active surface area.•RHHPC with hierarchical pores shows good effect o...

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Bibliographic Details
Published in:Journal of energy storage 2019-08, Vol.24, p.100756, Article 100756
Main Authors: Yin, Jian, Lin, Nan, Lin, Zhe-Qi, Wang, Yue, Shi, Jun, Bao, Jin-Peng, Lin, Hai-Bo, Feng, Shou-Hua, Zhang, Wen-Li
Format: Article
Language:English
Subjects:
Electrochemical kinetics
Electrochemically active surface area
Lead-acid battery
Lead-carbon electrode
Rice husk-derived hierarchical porous carbon
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Summary:Schematic diagram The roles of RHHPC with hierarchical pores in the negative electrode of lead-carbon battery. [Display omitted] •RHHPC is investigated as additives of lead-carbon electrodes.•RHHPC provides high electrochemically active surface area.•RHHPC with hierarchical pores shows good effect on Pb deposition. To prolong the cycle life of lead-carbon battery towards renewable energy storage, a challenging task is to maximize the positive effects of carbon additive used for lead-carbon electrode. In this paper, rice-husk-derived hierarchical porous carbon (RHHPC) is used to improve the electrochemical kinetics of lead-carbon electrode. Results show that charge acceptance of lead-carbon electrode is increased mainly due to the extra electrochemically active surface provided by RHHPC. Compared with the other carbon additives, RHHPC with high surface area and combined mesopores/macropores hierarchical structure exhibits a significant effect on the electrochemical kinetics of Pb/PbSO4 redox couple. Thus, the lead-carbon battery containing RHHPC shows good rate performance and excellent charge acceptance in deep charge/discharge partial state of charge operation. This study also suggests that carbon additive inevitably accelerates hydrogen evolution which breaks down the conductive network of lead-carbon electrode, so hydrogen evolution must be suppressed to enhance the cycling stability of lead-carbon battery.
ISSN:2352-152X
2352-1538
DOI:10.1016/j.est.2019.100756