| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Synergistic Hot-pressing and Potassium Bicarbonate Activation of Bamboo Sawdust for High-performance Supercapacitors |
| LIN Zhen1, DAI Dasong1,2,*
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1 College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
2 National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou 350002, China |
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Abstract Biomass-derived bamboo charcoal has received significant research attention as electrode material for supercapacitors due to its abundant resources, low cost, excellent electrical conductivity, and tunable surface architecture. In this study, bamboo sawdust was employed as the precursor, potassium bicarbonate (KHCO3) was used as a porogen, and a hot-pressing technique was applied to densify the raw material, resulting in bamboo-derived carbon with a high specific surface area. The results indicated that the bamboo biochar treated by physicochemical synergistic activation had a well-developed porous structure (specific surface area of 1 205 m2/g, pore volume of 0.639 cm3/g). It exhibited a high specific capacitance of 372 F·g-1 at 0.5 A·g-1 and maintained 70.4% capacitance retention after 3 000 cycles at a high current density of 10 A·g-1, which showed good electrochemical stability. Therefore, the synergistic hot-pressing and KHCO3 activation is an effective strategy for enhancing the electrochemical performance of biochar.
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Published: 25 April 2026
Online: 2026-05-06
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2026, Vol. 40 
