Fullerene-Grafted 3D Graphene As Electrical Energy Storage Material

Wednesday, 31 May 2017: 16:20
Churchill C1 (Hilton New Orleans Riverside)
M. R. Cerón, M. M. Biener, P. G. Campbell, J. Biener (Lawrence Livermore National Laboratory), and L. Echegoyen (The University of Texas at El Paso)
Supercapacitors have the potential to replace Li ion batteries as the next-generation electrical energy storage technology in demanding applications due to their high power density and excellent cycling stability. Graphene-based supercapacitor electrodes are particularly promising because they feature high surface area, good electrical conductivity, and chemical inertness. Researchers at Lawrence Livermore National Laboratory have developed tailored fullerene-grafted 3D mesoporous graphene macro-assemblies (GMAs) (Figure 1) for electrical energy storage applications by anchoring fullerene molecules to the 3D graphene backbone. Fullerene-grafted graphene (C60-GMA) materials promise to overcome the current charge storage limitations of carbon-based supercapacitors by combining the high charge storage capacitance of fullerenes with the high electrical conductivity of 3D-GMAs. In fact, the charge storage capacitance of fullerene (223 mAh/g) is similar or higher than that of today’s standard lithium ion battery electrode materials (177 mAh/g for LiFePO4).

Funding was provided by Lawrence Livermore National Laboratory Directed Research and Development (LDRD) Grant 17-ERD-017. This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344. IM Release Number LLNL-ABS-716277.

Figure 1. Fullerene-grafted 3D graphene bulk material