Construction of hierarchically porous biomass carbon using iodine as pore-making agent for energy storage.

Journal of Colloid and Interface Science
Xiaodong LuoXi Li

Abstract

High specific surface area, hierarchical porosity, high conductivity and heteroatoms doping have been considered as the dominating factors of high-performance carbon-based supercapacitors. Inspired by the blue phenomenon of combination of starch and iodine, iodine is employed firstly as pore-making agent to create micropores for the starch-derived carbon in this study. Based on this mechanism, the hierarchically porous carbon is synthesized through simple solvent heating and high-temperature (1000 °C) carbonization, which achieves high specific surface area of 2989 m2 g-1 (an increase of 39.7% compared to that without iodine) and low electrical resistivity of 0.21 Ω·cm. The assembled symmetric supercapacitors, combined with dual redox-active electrolyte (Bi3+ and Br-), deliver the specific capacitance of 1216 F g-1, energy density of 65.4 Wh kg-1, as well as power density of 787.3 W kg-1 at 2 A g-1. In brief, the abundant biomass resource starch is exploited as carbon source, and the iodine sublimation reaction is conducted to provide more micropores to develop high-performance electrodes of supercapacitors.

References

Jul 1, 1947·Journal of the American Chemical Society·R E RUNDLE
Jul 22, 2016·Journal of the American Chemical Society·Brian EvankoGalen D Stucky
Jan 10, 2017·Advanced Materials·Yangang WangLiangbing Hu
Apr 4, 2018·Journal of Colloid and Interface Science·Cunjing WangKai Jiang
Jan 12, 2019·Journal of Colloid and Interface Science·Lijie HouShanshan Li
Jan 17, 2019·ACS Applied Materials & Interfaces·Yuan WangFuqiang Huang
Jul 10, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Akbar Mohammadi Zardkhoshoui, Saied Saeed Hosseiny Davarani

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