Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 574, Issue -, Pages 377-384Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.03.082
Keywords
Lead-carbon hybrid capacitor; PbO2 electrode; Effective utilization rate of active materials; Nano-SiO2
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Funding
- National key Research and Development Program [2017YFB307500]
- National Natural Science Foundation of China [21573093, 51502117]
- Science and Technology Innovation Team Project of Jilin University [2017TD-31]
- Major Science and Technology Research Project of ``Shuangshi Projectin Changchun City [17SS018]
- Key Research & Development Plan of Zhenjiang City [SH2017051]
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The PbO2 electrodes of lead-acid batteries are normally applied as the positive electrodes in lead-carbon hybrid capacitors. However, the effective utilization rate of active materials in the electrodes is only about 12.5%, leading to a low energy density of lead-carbon hybrid capacitors. In this paper, a nano-SiO2 doped PbO2 electrode was prepared by the co-electrodeposition method. The energy density of the lead-carbon hybrid capacitor using a nano-SiO2/PbO2 electrode can reach 61 Wh kg(-1) at 3 A g(-1). The results show that the inert nano-SiO2 can establish electrolyte diffusion channels in the positive electrode, and thus improve the effective utilization rate of active materials. This work provides a new idea for the design and development of the positive materials for high-performance lead-carbon hybrid capacitors. (C) 2020 Published by Elsevier Inc.
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