新型炭材料（中英文）2025，Vol.40Issue(2)：397-408,12.DOI:10.1016/S1872-5805(25)60960-7
超高功率及电池级能量超级电容器用生物炭的导电性和微孔率调控
Controlling the conductivity and microporosity of biocarbon to produce supercapacitors with battery-level energies at an ultrahigh power
摘要
Abstract
In order to meet the demands of new-generation electric vehicles that require high power output(over 15 kW/kg),it is crucial to increase the energy density of car-bon-based supercapacitors to a level comparable to that of batteries,while maintaining a high power density.We re-port a porous carbon material produced by immersing pop-lar wood(PW)sawdust in a solution of KOH and graphene oxide(GO),followed by carbonization.The resulting mater-ial has exceptional properties as an electrode for high-en-ergy supercapacitors.Compared to the material prepared by the direct carbonization of PW,its electrical conductivity was in-creased from 0.36 to 26.3 S/cm.Because of this and a high microporosity of over 80%,which provides fast electron channels and a large ion storage surface,when used as the electrodes for a symmetric supercapacitor,it gave a high energy density of 27.9 Wh/kg@0.95 kW/kg in an aqueous electrolyte of 1.0 mol/L Na2SO4.The device also had battery-level energy storage with maximum energy densities of 73.9 Wh/kg@2.0 kW/kg and 67.6 Wh/kg@40 kW/kg,an ultrahigh power density,in an organic electrolyte of 1.0 mol/L TEABF4/AN.These values are comparable to those of 30-45 Wh/kg for Pb-acid batteries and 30-55 Wh/kg for aqueous lithium batteries.This work indicates a way to prepare carbon materials that can be used in supercapacit-ors with ultrahigh energy and power densities.关键词
还原氧化石墨烯修饰/疏松木头/对称超级电容器/电池级能量密度Key words
Reduced GO modification/Loose wood/Symmetric supercapacitor/Battery-level energy density分类
化学化工引用本文复制引用
程贝,谢星艳,万柳,陈建,张燕,杜成,郭学锋,解明江..超高功率及电池级能量超级电容器用生物炭的导电性和微孔率调控[J].新型炭材料（中英文）,2025,40(2):397-408,12.基金项目
This research was generously funded by the Sci-ence and Technology Innovation Team Plan for Young Scholars in Hubei province(T2020021)and the Outstanding Youth Fund of the Natural Science Foundation of Hubei Province(2024AFA086).The authors would like to express their gratitude to Shiy-anjia Lab(www.shiyanjia.com)for conducting the XPS tests. 湖北省高等学校优秀中青年科技创新团队计划项目(T2020021),湖北省自然科学基金杰出青年基金项目(2024AFA086). （T2020021）
