Zhou Guolang, Yin Jingzhou, Sun Zechun, Gao Xiaoliang, Zhu Fengxia, Zhao Pusu, Li Rongqing, Xu Jiaying
Jiangsu Key Laboratory for the Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University Huai'an 223001 P. R. China
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 P. R. China.
RSC Adv. 2020 Jan 17;10(6):3246-3255. doi: 10.1039/c9ra08537h. eCollection 2020 Jan 16.
Biomass porous carbon materials are ideal supercapacitor electrode materials due to their low price, rich source of raw materials and environmental friendliness. In this study, an ultrasonic-assisted method was applied to synthesize the rice-straw-based porous carbon (UPC). The obtained UPC exhibited a two-dimensional structure and high specific surface area. In addition, the electrochemical test results showed that the UPC with a 1 hour ultrasonic treatment and lower activation temperature of 600 °C (UPC-600) demonstrated optimal performance: high specific capacitances of 420 F g at 1.0 A g and 314 F g at a high current of 10 A g. Significantly, the symmetric supercapacitors showed a high energy density of 11.1 W h kg and power density of 500 W kg. After 10 000 cycles, 99.8% of the specific capacitance was retained at 20 A g. These results indicate that UPC-600 is a promising candidate for supercapacitor electrode materials.
生物质多孔碳材料因其价格低廉、原材料来源丰富且环境友好，是理想的超级电容器电极材料。在本研究中，采用超声辅助法合成了稻草基多孔碳（UPC）。所制备的UPC呈现二维结构且具有高比表面积。此外，电化学测试结果表明，经1小时超声处理且活化温度较低为600℃的UPC（UPC-600）表现出最优性能：在1.0 A g时比电容高达420 F g，在10 A g的高电流下比电容为314 F g。值得注意的是，对称超级电容器展现出11.1 W h kg的高能量密度和500 W kg的功率密度。在20 A g下经过10000次循环后，比电容保留了99.8%。这些结果表明UPC-600是超级电容器电极材料的一个有潜力的候选者。
