Three-dimensional holey-graphene/niobia composite architectures for ultrahigh-rate energy storage

Hongtao Sun, Lin Mei, Junfei Liang, Zipeng Zhao, Chain Lee, Huilong Fei, Mengning Ding, Jonathan Lau, Mufan Li, Chen Wang, Xu Xu, Guolin Hao, Benjamin Papandrea, Imran Shakir, Bruce Dunn, Yu Huang, Xiangfeng Duan

Research output: Contribution to journalArticlepeer-review

1229 Scopus citations


Nanostructured materials have shown extraordinary promise for electrochemical energy storage but are usually limited to electrodes with rather low mass loading (∼1 milligram per square centimeter) because of the increasing ion diffusion limitations in thicker electrodes. We report the design of a three-dimensional (3D) holey-graphene/niobia (Nb2O5) composite for ultrahigh-rate energy storage at practical levels of mass loading (>10 milligrams per square centimeter). The highly interconnected graphene network in the 3D architecture provides excellent electron transport properties, and its hierarchical porous structure facilitates rapid ion transport. By systematically tailoring the porosity in the holey graphene backbone, charge transport in the composite architecture is optimized to deliver high areal capacity and high-rate capability at high mass loading, which represents a critical step forward toward practical applications.

Original languageEnglish (US)
Pages (from-to)599-604
Number of pages6
Issue number6338
StatePublished - May 12 2017

All Science Journal Classification (ASJC) codes

  • General


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