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Improving Electrochemical Performance of Cellulose Fiber-based Supercapacitor Electrode Using Polypyrrole-wrapped Iron Oxyhydroxide
Received:April 30, 2021    Click here to download the full text
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Author NameAffiliation
Kang Youngchu Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University) Ministry of Education, Harbin, Heilongjiang Province, 150040, China 
Jin Hailan Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University) Ministry of Education, Harbin, Heilongjiang Province, 150040, China 
An Xianhui Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University) Ministry of Education, Harbin, Heilongjiang Province, 150040, China 
Qian Xueren Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University) Ministry of Education, Harbin, Heilongjiang Province, 150040, China 
 
Abstract:Polypyrrole (PPy)@cellulose fiber-based composites have been widely investigated as electrode materials for use in flexible supercapacitors. However, they cannot readily provide high specific capacitance and cyclic stability owing to their inherent drawbacks, such as high resistance, Weber impedance, and volume expansion or collapse during charging/discharging. In this study, iron oxyhydroxide (FeOOH) is incorporated in the abovementioned composite to decrease the equivalent series resistance, charge transfer resistance, and Weber impedance, thereby enhancing electron transfer and ion diffusion, which results in superior electrochemical performance. The PPy-wrapped FeOOH@cellulose fiber-based composite electrode with the molar ratio of FeSO4 to NaBH4 of 1∶1 exhibits a high specific capacitance of 513.8 F/g at a current density of 0.2 A/g, as well as an excellent capacitance retention of 89.4% after 1000 cycles.
keywords:cellulose fibers  iron oxyhydroxide  polypyrrole  electrode material  electrochemical performance
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