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论文类型：期刊论文

发表时间：2013-08-15

发表刊物：8th Asian-European International Conference on Plasma Surface Engineering (AEPSE)

收录刊物：SCIE、EI、CPCI-S、Scopus

卷号：228

期号：SUPPL.1

页面范围：S120-S125

ISSN号：0257-8972

关键字：Graphene sheets; DC arc-discharge; Electrochemical hydrogen storage

摘要：Graphene, as the fundamental two-dimensional carbon structure with exceptionally high crystal and electronic quality, had attracted increasing interest for its promising potential applications. In this article, the few-layer graphene sheets have been achieved by the direct current (DC) arc-discharge under hydrogen atmosphere, using pure graphite rods as the electrodes. The influence of hydrogen pressures (e.g. 0.03 MPa, 0.05 MPa, 0.07 MPa) on the products and their electrochemical properties for hydrogen storage were investigated. It is indicated that the graphene sheets were less than 10 layers and with the sizes in range of 200-500 nm. Among all graphene sheet samples, the highest capacity for electrochemical hydrogen storage was 147.8 mAh/g. Mechanism for electrochemical hydrogen insertion/desertion of such graphene sheet was discussed with respect to the single-layer graphene and multi-layer graphite. (C) 2012 Elsevier B.V. All rights reserved.