▎ 摘　　要

The electrochemical exfoliation of graphite in molten NaCl under an Ar-4%H-2 atmosphere was examined, and found to be a possible economic method for the green production of highly crystalline 3D graphene related nanostructures in a large scale. The role of hydrogen in the exfoliation process is highlighted. The graphene product exhibited a uniform mesoporous structure, high electrical conductivity of 2.1 x 10(5) S m(-1) as well as a specific surface area of 232 m(2) g(-1) and thermal stability in air at temperatures below 500 C-omicron. The exfoliation rate was estimated to be about 200 g graphene per liter of molten NaCl per day. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.