Integration of Fullerenes as Electron-Acceptors in 3D Graphene Networks

Technical Report · Wed Aug 28 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1567989· OSTI ID:1567989

Santoyo, Christy ^[1]; Ceron, Maira R. ^[1]; Biener, Monika M. ^[1]

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1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

The need for better electrical energy storage has become of fundamental importance. In this research we used the high electrical conductivity of graphene and the high electron affinity of [60]-fullerene (C₆₀) to obtain better electrochemical stability and charge transfer. Three functionalized fullerenes were integrated to 3D mesoporous graphene macro-assemblies (GMA’s) to increase their gravimetric capacity. We wanted to explore a longer and more rigid addend to modify C₆₀ that would increase the fullerene graphene interaction to obtain higher cycling stability. Cyclic voltammetry was performed on each sample at different potential windows. Out of the three functionalized fullerenes, C₆₀-5 had the best electrochemical stability of the hybrid electrodes. To further increase the stability of the GMA-fullerene hybrid, we covalently attached the fullerene derivative onto GMA.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1567989
• Report Number(s): LLNL-TR-788224; 986137
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE