期刊
JOURNAL OF POWER SOURCES
卷 451, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.227731
关键词
Cobalt manganese oxide; Bio-based porous carbon; Morphology transformation; Dye-sensitized solar cell; Electrocatalytic accelerants
资金
- NSFC [51672208]
- National Key RAMP
- D Program of China [2018YFB1502902]
- Key Program for International SAMP
- T Cooperation Projects of Shaanxi Province [2019KWZ-03]
- Sci-Tech RAMP
- D Progra of Shaanxi Province [2010K01-120, 2011JM6010, 2015JM5183]
- SRF for ROCS, SEM [(2012)940]
We propose a facile strategy to synthesize highly electrocatalytic active nanohybrids by the integration of aloe vera-peel derived porous carbon into manganese-based and cobalt/manganese-based oxides. These nanohybrids exhibit unique three-dimensional porous network structures and possess high surface areas, providing numerous catalytic sites and multiple rapid electron transfer channels. In this work, the as-synthesized nanohybrids are used as accelerants for tri-iodide reduction in dye-sensitized solar cells, resulting in attractive cell efficiency and superior electrochemical stability. The solar cell with low-cost bio-based carbon integrated cobalt/manganeseoxide counter electrode exhibits higher photovoltaic efficiency than that of platinum electrode (7.01% vs. 6.44%). In addition, hybrid catalyst loaded counter electrodes also demonstrate long-term electrochemical stability in electrolyte, retaining 97% of its initial efficiency (6.83%/7.01%) in working cell, after going through multiple cyclic voltammetry scans. The utilization of synergistic effects of high performance constituents and controlled morphology is a key strategy to intensify the catalytic activity, electrochemical stability, and power conversion efficiency in advanced photovoltaics.
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