Packing Activated Carbons into Dense Graphene Network by Capillarity for High Volumetric Performance Supercapacitors.

ABSTRACT: Supercapacitors are increasingly in demand among energy storage devices. Due to their abundant porosity and low cost, activated carbons are the most promising electrode materials and have been commercialized in supercapacitors for many years. However, their low packing density leads to an unsatisfactory volumetric performance, which is a big obstacle for their practical use where a high volumetric energy density is necessary. Inspired by the dense structure of irregular pomegranate grains, a simple yet effective approach to pack activated carbons into a compact graphene network with graphene as the "peels" is reported here. The capillary shrinkage of the graphene network sharply reduces the voids between the activated carbon particles through the microcosmic rearrangement while retaining t

SUBMITTER: Li P 

PROVIDER: S-EPMC6661934 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature