Hongtao Sun1, Lin Mei1,2, Junfei Liang3, Zipeng Zhao3, Chain Lee1, Huilong Fei1, Mengning Ding4,3, Jonathan Lau3, Mufan Li1, Chen Wang3, Xu Xu1, Guolin Hao1, Benjamin Papandrea1, Imran Shakir5, Bruce Dunn4,3, Yu Huang4,3, Xiangfeng Duan4,1
1Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
2State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
3Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA
4California NANOSystems Institute, University of California, Los Angeles, CA 90095, USA.
5Sustainable Energy Technologies Centre, College of Engineering, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia.
Tóm tắt
As with donuts, the holes matter
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.
Science
, this issue p.
599
