Holding a promise of achieving high power and energy densities,Li-ion hybrid electrochemical capacitors present a crucial future direction for energy storage devices.However,technical challenges remain to appropriatel...Holding a promise of achieving high power and energy densities,Li-ion hybrid electrochemical capacitors present a crucial future direction for energy storage devices.However,technical challenges remain to appropriately couple both high-power capacitor-type and high-energy battery-type electrode materials within a same device.In addition,the current electrode materials in the device are usually prepared separately,which leads to lengthy preparation,time-consuming and high-cost.In this work,we report a simple method to prepare porous carbon materials(PC) with and without MnO nanoparticle cores,which function as very unique anode/cathode pairs for very high-performance Li ion hybrid supercapacitor.Taking the respective merits of high Li storage capacity from the MnO@C anode and high-rate performance from the PC cathode,the resulted device exhibits a remarkable energy density of 89 Wh·kg^(-1)(at 48 W·kg^(-1)) and can reach a battery-inaccessible power density of 18 kW·kg^(-1)(at 45Wh·kg^(-1)).展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.11632004, 52005151 and U1864208)the Research Program of Local Science and Technology Development under the Guidance of Central (No. 216Z4402G)+6 种基金the National Science and Technology Major Project (No.2017-Ⅶ-0011-0106)the Science and Technology Planning Project of Tianjin (No.20ZYJDJC00030)the Key Program of Research and Development of Hebei Province (No. 202030507040009)the Fund for Innovative Research Groups of Natural Science Foundation of Hebei Province (No.A2020202002)the Key Project of Natural Science Foundation of Tianjin (No. S20ZDF077)support from the Open Project Found of Chongqing Key Laboratory of Green(No.GATRI2021F01005B)support from "Yuanguang" Scholar Program of Hebei University of Technology。
文摘Holding a promise of achieving high power and energy densities,Li-ion hybrid electrochemical capacitors present a crucial future direction for energy storage devices.However,technical challenges remain to appropriately couple both high-power capacitor-type and high-energy battery-type electrode materials within a same device.In addition,the current electrode materials in the device are usually prepared separately,which leads to lengthy preparation,time-consuming and high-cost.In this work,we report a simple method to prepare porous carbon materials(PC) with and without MnO nanoparticle cores,which function as very unique anode/cathode pairs for very high-performance Li ion hybrid supercapacitor.Taking the respective merits of high Li storage capacity from the MnO@C anode and high-rate performance from the PC cathode,the resulted device exhibits a remarkable energy density of 89 Wh·kg^(-1)(at 48 W·kg^(-1)) and can reach a battery-inaccessible power density of 18 kW·kg^(-1)(at 45Wh·kg^(-1)).
