Capacitance is generally determined by the porous microstructure,electron conduction and the synergy effect of active sites in the porous electrode.In this work,we grew centimeter-scale metallic porous GaN single crys...Capacitance is generally determined by the porous microstructure,electron conduction and the synergy effect of active sites in the porous electrode.In this work,we grew centimeter-scale metallic porous GaN single crystals with conductivity up to 18 S/cm at room temperature.The Cu-catecholates(Cu–CAT)nanowire arrays were grown on porous GaN single crystal to form porous single-crystalline electrode with enhanced supercapacitor performance.The Cu–CAT/GaN single crystalline electrode exhibits specific capacitance of 216 F/g and normalized capacitance of 40μF/cm^(2).After 5000 cycles,it retains 80%of its initial capacitance.The porous single-crystalline GaN electrode has high porosity and excellent conductivity showing high surface capacitance.展开更多
基金supported by the National Key Research and Development Program of China(2017YFA0700102)Natural Science Foundation of China(91845202)+1 种基金Dalian National Laboratory for Clean Energy(DNL180404)Strategic Priority Research Program of Chinese Academy of Sciences(XDB2000000)。
文摘Capacitance is generally determined by the porous microstructure,electron conduction and the synergy effect of active sites in the porous electrode.In this work,we grew centimeter-scale metallic porous GaN single crystals with conductivity up to 18 S/cm at room temperature.The Cu-catecholates(Cu–CAT)nanowire arrays were grown on porous GaN single crystal to form porous single-crystalline electrode with enhanced supercapacitor performance.The Cu–CAT/GaN single crystalline electrode exhibits specific capacitance of 216 F/g and normalized capacitance of 40μF/cm^(2).After 5000 cycles,it retains 80%of its initial capacitance.The porous single-crystalline GaN electrode has high porosity and excellent conductivity showing high surface capacitance.
