期刊
CARBON
卷 50, 期 10, 页码 3836-3844出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.04.025
关键词
-
资金
- Laboratory Directed Research and Development (LDRD) project at Sandia National Laboratories (SNL)
- Nanostructures for Electrical Energy Storage (NEES)
- Energy Frontier Research Center (EFRC)
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DESC0001160]
- LDRD
- NEES center
- Sandia-Los Alamos Center for Integrated Nanotechnologies (CINT)
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- NSF [CMMI-0758554, 1100205, CMMI-0728069, DMR-1008104, DMR-1120901, AFOSR FA9550-08-1-0325]
- Sandia National Laboratory [1100745]
- Air Force Office of Scientific Research [FA9550-09-1-0581]
- ONR MURI graphene program [00006766, N00014-09-1-1066]
- NSF grant [CMMI-0900692]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1100205] Funding Source: National Science Foundation
We report an in situ transmission electron microscopy study of the electrochemical behavior of few-layer graphene nanoribbons (GNRs) synthesized by longitudinal splitting the multi-walled carbon nanotubes (MWCNTs). Upon lithiation, the GNRs were covered by a nanocrystalline lithium oxide layer attached to the surfaces and edges of the GNRs, most of which were removed upon delithiation, indicating that the lithiation/delithiation processes occurred predominantly at the surfaces of GNRs. The lithiated GNRs were mechanically robust during the tension and compression tests, in sharp contrast to the easy and brittle fracture of the lithiated MWCNTs. This difference is attributed to the unconfined stacking of planar carbon layers in GNRs leading to a weak coupling between the intralayer and interlayer deformations, as opposed to the cylindrically confined carbon nanotubes where the interlayer lithium produces large tensile hoop stresses within the circumferentially-closed carbon layers, causing the ease of brittle fracture. These results suggest substantial promise of graphene for building durable batteries. (c) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据