Wang Yanbin, Wang Dian, Li Zhaoxia, Su Qiong, Wei Shuai, Pang Shaofeng, Zhao Xiangfei, Liang Lichun, Kang Lihui, Cao Shijun
School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China.
Key Laboratory of Environmentally Friendly Composite Materials of the State Ethnic Affairs Commission, Key Laboratory of Utility of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province, Lanzhou 730030, China.
Nanomaterials (Basel). 2022 Apr 1;12(7):1182. doi: 10.3390/nano12071182.
Abundant biomass resources are a good choice for preparing electrode materials for supercapacitors, but developing a versatile and simple synthetic method to convert them into electrode materials remains a challenge. In the present research, our team reports a promising strategy and cost-efficient method to fabricate boron/sulfur-codoped porous carbon from biomass sources, mainly utilizing four biomass materials. Detailed material characterization showed that the samples produced by this approach possess rich B and S doping. Additionally, the original biomass materials treated by activation produce abundant pores. Therefore, owing to the synergetic effect of abundant atomic doping and microporous/mesoporous distribution, the obtained carbon as electrode material manifested excellent specific capacitances of 290 F g at a 0.5 A g current density. Moreover, the specific energy of the prepared samples of the as-assembled symmetric supercapacitor is as high as 16.65 Wh kg in 1 M NaSO, with a brilliant cyclical performance of only a 2.91% capacitance decay over 10,000 cycles. In addition, it has been verified universally that three other types of bio-wastes can also prepare electrode material using this method. This paper represents a significant attempt to turn waste biomass into treasure while also providing ideas for the design and preparation of supercapacitor electrode materials.
丰富的生物质资源是制备超级电容器电极材料的良好选择，但开发一种通用且简单的合成方法将其转化为电极材料仍然是一项挑战。在本研究中，我们团队报告了一种有前景的策略和经济高效的方法，主要利用四种生物质材料从生物质源制备硼/硫共掺杂多孔碳。详细的材料表征表明，通过这种方法制备的样品具有丰富的硼和硫掺杂。此外，经活化处理的原始生物质材料产生大量孔隙。因此，由于丰富的原子掺杂和微孔/介孔分布的协同效应，所获得的作为电极材料的碳在0.5 A g电流密度下表现出290 F g的优异比电容。此外，所组装的对称超级电容器的制备样品在1 M NaSO₄中的比能量高达16.65 Wh kg，具有出色的循环性能，在10000次循环中电容衰减仅为2.91%。此外，已普遍验证其他三种类型的生物废弃物也可以使用这种方法制备电极材料。本文是将废弃生物质转化为宝的一次重要尝试，同时也为超级电容器电极材料的设计和制备提供了思路。
