文献类型：期刊文献

英文题名：Pore structure design of activated carbon microspheres by molten salt-assisted strategy for high energy density supercapacitors

作者：Huan, Xiangli[1];Liu, Baishan[1];Wang, Yanli[1];Cheng, Liang[1];Zhan, Liang[1];Zhang, Yongzheng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai Key Lab Multiphase Mat Chem Engn,Minist E, Shanghai 200237, Peoples R China

年份：2025

卷号：320

外文期刊名：MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS

收录：;EI(收录号：20252018436322);WOS:【SCI-EXPANDED(收录号:WOS:001494682800001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (52372045 and No. 22075081) , China Postdoctoral Science Foundation (No. 2023M731084) , Shanghai Sailing Program of China (23YF1408900) .

语种：英文

外文关键词：Molten salt-assisted strategy; CO 2 activation; Hierarchically porous structure; Supercapacitors

摘要：Porous carbon is one of the preferred electrode materials for supercapacitors. Herein, hierarchically porous activated carbon microspheres (PACSs) are prepared by molten salt-assisted carbonization and CO2 activation. In this strategy, the molten NaCl acts as a supplier of high energy Cl-, which is responsible for etching the skeleton of the carbon material and creating more defects for subsequent CO2 activation to construct a hierarchically porous structure in the activated carbon spheres, providing a large specific surface area (2087 m2 g-1) and high porosity (77.8% mesoporosity). When assembled into symmetric supercapacitor, the PACSs electrode exhibited a specific capacitance of 123 F g-1 at 0.1 A g-1 in organic electrolyte. Moreover, the device can display excellent cycling performance with a capacitance retention of 93.1% after 10,000 cycles and a high energy density of 25.66 Wh kg-1 (at 61.17 W kg-1). This study pioneers a new strategy for constructing hierarchically porous structure in carbon materials for energy storage devices.