Browsing by Author "Liu, Lijia"

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    Facile synthesis of high-surface-area nanoporous carbon from biomass resources and its application in supercapacitors
    (Royal Society of Chemistry, 2018-01-09) Yao, Yuechao; Zhang, Qi; Liu, Peng; Yu, Liang; Huang, Lin; Zeng, Shao-Zhong; Liu, Lijia; Zenga, Xierong; Zou, Jizhao
    It is critical for nanoporous carbons to have a large surface area, and low cost and be readily available for challenging energy and environmental issues. The pursuit of all three characteristics, particularly large surface area, is a formidable challenge because traditional methods to produce porous carbon materials with a high surface area are complicated and expensive, frequently resulting in pollution (commonly from the activation process). Here we report a facile method to synthesize nanoporous carbon materials with a high surface area of up to 1234 m2 g−1 and an average pore diameter of 0.88 nm through a simple carbonization procedure with carefully selected carbon precursors (biomass material) and carbonization conditions. It is the high surface area that leads to a high capacitance (up to 213 F g−1 at 0.1 A g−1) and a stable cycle performance (6.6% loss over 12 000 cycles) as shown in a three-electrode cell. Furthermore, the high capacitance (107 F g−1 at 0.1 A g−1) can be obtained in a supercapacitor device. This facile approach may open a door for the preparation of high surface area porous carbons for energy storage.