Porous 3D graphene-based bulk materials with exceptional high surface area and excellent conductivity for supercapacitors

By Long Zhang, Fan Zhang, Xi Yang, Guankui Long, Yingpeng Wu, Tengfei Zhang, Kai Leng, Yi Huang, Yanfeng Ma, A. Yu and 1 more. Scientific Reports, 2013

690 citations recorded by the source corpus.

Until now, few sp2 carbon materials simultaneously exhibit superior performance for specific surface area (SSA) and electrical conductivity at bulk state. Thus, it is extremely important to make such materials at bulk scale with those two outstanding properties combined together. Here, we present a simple and green but very efficient approach using two standard and simple industry steps to make such three-dimensional graphene-based porous materials at the bulk scale, with ultrahigh SSA (3523 m2/g) and excellent bulk conductivity. We conclude that these materials consist of mainly defected/wrinkled single layer graphene sheets in the dimensional size of a few nanometers, with at least some covalent bond between each other. The outstanding properties of these materials are demonstrated by their superior supercapacitor performance in ionic liquid with specific capacitance and energy density of 231 F/g and 98 Wh/kg, respectively, so far the best reported capacitance performance for all bulk carbon materials.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3ae0063f684914bdd689eb7394058295700b0123

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Citations in the corpus

Graphene, related two-dimensional crystals, and hybrid systems for energy conversion and storage (2015, background): “Hydrothermal carbonization of either biomass or polymer mixed with dispersed GO, followed by chemical activation, yielded a 3D structure with nanoscale pores and a SSA of 3523m(2)/g (116).”
Graphene-based Li-ion hybrid supercapacitors with ultrahigh performance (2013, methodology): “The porous graphene–sucrose carbon composite was prepared as described in our previous report [43].”
Hydrothermal synthesis and activation of graphene-incorporated nitrogen-rich carbon composite for high-performance supercapacitors (2014, background): “[33] Zhang L, Zhang F, Yang X, Long G, Wu Y, Zhang T, et al.”
High energy density Li-ion capacitor assembled with all graphene-based electrodes (2015, methodology): “Besides, the bulk material also shows excellent conductivity of 303 S m 1 [17].”