首页|Fabrication of heteroatom-self-doped hierarchical porous carbon from soy protein isolate hydrogel for high-performance supercapacitors via a double-effect strategy of template-activation
Fabrication of heteroatom-self-doped hierarchical porous carbon from soy protein isolate hydrogel for high-performance supercapacitors via a double-effect strategy of template-activation
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
The three-dimensional(3D)N/O/S self-doped hierarchical porous carbons(SPI-PC-x)with a"coral"-like geometry structure are successfully synthesized with renewable soy protein isolated(SPI)as the precursor.Draw support from the self-swelling principle of proteins,the SPI hydrogel is fabricated to absorb KOH solution,and thus uniformly distributed KOH not only serves as a built-in template to prevent carbon wall fusion/aggregation,but also acts as an activator to produce plentiful micropores.On the whole,our approach is sustainable because hierarchical porous carbons(PCs)are generated by a one-step pyrolysis process with a very low consumption of KOH.The SPI-PC-0.50 exhibits the gravimetric specific capacitance of 320 F g~(-1)at a current density of 0.5A g~(-1)in the threeelectrode system because of a great specific surface area(SSA)(1914.08 m~2 g~(-1))and a high heteroatom-doping level(16.4 at%).And it achieves the energy density of 8.0 Wh kg~(-1)and 27.0 Wh kg~(-1)in the two-electrode systems with 6 M KOH and 1 M Na2SO4 as electrolytes,respectively.This work provides a theoretical and methodological support for the facile fabrication of 3D heteroatom self-doped PCs with the assistance of SPI gelation and the uniformly distributed activator under the principle of protein self-swelling.
Soy protein isolate hydrogelPorous carbonHierarchical poreSupercapacitorElectrochemical performance
Jinhuan Li、Jiaojiao Zhang、Yi Yan
展开 >
College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,No.29 Jiangjun Avenue,Jiangning District,Nanjing City,Jiangsu Province,China
NSTL
