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Pursuing high performance of supercapacitors with low-cost and environmental friendliness, various biomass materials (including glucose, sucrose, starch, cellulose, glucan, chitosan and lignin) have been employed as the precursor of porous carbon materials for supercapacitors, which also have exhibited superior electrochemical performance.The products are prepared using a green method including two steps, which are low-temperature hydrothermal reaction and the following chemical activation process.