Three-dimensional holey-graphene/niobia composite architectures for ultrahigh-rate energy storage
Abstract
Improving the density of stored charge and increasing the speed at which it can move through a material are usually opposing objectives. Sun et al. developed a Nb 2 O 5 /holey graphene framework composite with tailored porosity. The three-dimensional, hierarchically porous holey graphene acted as a conductive scaffold to support Nb 2 O 5 . A high mass loading and improved power capability were reached by tailoring the porosity in the holey graphene backbone with higher charge transport in the composite architecture. The interconnected graphene network provided excellent electron transport, and the hierarchical porous structure in the graphene sheets facilitated rapid ion transport and mitigated diffusion limitations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 12, 2017
- Source ID
- 10.1126/science.aam5852
Entities
People
- Benjamin Papandrea
- Bruce Dunn
- Chain Lee
- Chen Wang
- Guolin Hao
- Hongtao Sun
- Huilong Fei
- Imran Shakir
- Jonathan Lau
- Junfei Liang
- Lin Mei
- Mengning Ding
- Mufan Li
- Xiangfeng Duan
- Xu Xu
- Yu Huang
- Zipeng Zhao
Organizations
- China Scholarship Council
- Hunan University
- King Saud University
- National Science Foundation
- Office of Naval Research
- United States Department of Energy
- University of California
- University of California, Los Angeles