超级电容器
材料科学
碳化
电容
电解质
复合材料
碳纤维
功率密度
储能
生物炭
多孔性
电化学
纳米材料
纳米技术
化学工程
电极
复合数
热解
化学
量子力学
物理
工程类
物理化学
扫描电子显微镜
功率(物理)
作者
Junye Zhang,Hao Guo,Fan Yang,Mingyue Wang,Hao Zhang,Tingting Zhang,Lei Sun,Meng Yang,Wu Yang
标识
DOI:10.1016/j.colsurfa.2021.127584
摘要
In this paper, novel hybrid nanomaterials constituting carbonized biomass materials derived from walnut shells and metal-organic framework (MOF) have been researched as a new class of renewable supercapacitor materials for electrochemical energy storage. One synthetic route is employed to grow Ni-MOF in the peripheries and channels of walnut shells derived carbon (WS), which had been carbonized previously by heat treatment in air at 850 °C to produce a highly porous network, and vulcanized polyaniline (SPANI) is used as a dummy plate preventing the agglomeration of MOFs and a wire connecting WS and MOFs, which easily improves the electron transfer and enhances the conductivity of the electrode material. The specific capacitance of the obtained [email protected] composite is up to 4 times that of the biochar at the current density of 1 A g-1. The connection of SPANI also obviously accelerates the transfer of electrolyte ions. The resulting specific capacitance could reach 14 times of the biochar and exhibit high cycle stability (retention rate of 90.4% after 20000 cycles). In addition, the assembled asymmetrical supercapacitor (ASC) shows a high energy density of 34.79 Wh kg-1 at the power density of 824 W kg-1. This work provides a brilliant renewable candidate for the excellent energy storage device and a promising route design strategy for preparation of high performance and long life electrode materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI