Biomass-derived carbons are widely studied as cost-effective and high-performance energy storage materials due to their high specific surface area, abundance, and facile synthetic methods. Through widespread research, a number of strategies can be implemented to maximize specific capacitance and power. Among the different approaches to improve energy storage performance of biomass-derived carbons, an increase of specific surface area and the introduction of heteroatom doping are usually effective strategies. As such, in this study, we utilize sorghum stem biomass to obtain porous carbonaceous forms, and subsequent KOH activation to increase the porosity and surface area. The resulting activated sorghum stem-derived porous carbon materials exhibit significantly higher specific capacitance compared to their pre-activated carbon. Capacitive deionization (CDI) that is used to deionize water is also studied to demonstrate the versatility of sorghum stem-derived porous carbon. A similar performance trend is observed for both supercapacitor and CDI for all carbon samples because both applications exploit the electrostatic double-layer capacitance behavior of carbon materials.

由于生物质衍生的碳具有高的比表面积，丰度和简便的合成方法，因此被广泛研究为具有成本效益和高性能的储能材料。通过广泛的研究，可以实施多种策略来最大化比电容和功率。在改善源自生物质的碳的能量存储性能的不同方法中，增加比表面积和引入杂原子掺杂通常是有效的策略。因此，在这项研究中，我们利用高粱茎生物质获得多孔碳质形式，随后利用KOH活化来增加孔隙率和表面积。所得的活化的高粱茎来源的多孔碳材料比其预活化的碳表现出明显更高的比电容。还对用于去离子水的电容去离子（CDI）进行了研究，以证明高粱茎衍生的多孔碳的多功能性。对于所有碳样品，超级电容器和CDI均观察到类似的性能趋势，因为这两种应用都利用了碳材料的静电双层电容特性。