首页|Self-propagating high–temperature synthesis of porous graphene by magnesiothermic reaction as high–performance electrochemical electrode material
Self-propagating high–temperature synthesis of porous graphene by magnesiothermic reaction as high–performance electrochemical electrode material
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NSTL
Elsevier
Graphene is widely used in supercapacitors due to its large specific surface area and excellent electrical conductivity. However, a large scale efficient and sustainable production of high–quality graphene is still an urgent challenge. We report a controllable self-propagating high–temperature synthesis (SHS) process to convert CO2 with a mixed powder of magnesium and zinc into porous graphene (PG). The prepared PG contains 3–6 layers, with a plenty of uniform 2–4 nm mesopores, and has a specific surface area as high as 1458 m2 g?1. The obtained PG was used as an electrode material for the supercapacitor and exhibited a superior capacitance performance. At a current density of 1 A g?1, the specific capacitance can reach 177 F g?1. Capacitance retention rate is as high as 91% after 10,000 cycles at a current density of 5 A g?1. In addition, the charge–discharge curve remains approximately triangular at a current density of 20 A g?1, which shows satisfactory capacitance properties. We expect that our results will contribute to the development of the large-scale graphene synthesis technology based on a use of the SHS method aimed for the application as high–performance supercapacitor materials.
CO2 reductionPorous grapheneSelf-propagating high-temperature synthesisSupercapacitors
Su S.、Tian Y.、Li S.、Ping D.、jing B.、Hu G.、Wang C.、Wei Z.、Zhao Q.、He M.
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School of Chemical Engineering Zhengzhou University
School of Material Science and Engineering Zhengzhou University
NSTL
Elsevier
