Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 599-604 |
| Number of pages | 6 |
| Journal | Science |
| Volume | 356 |
| Issue number | 6338 |
| DOIs | |
| State | Published - May 12 2017 |
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All Science Journal Classification (ASJC) codes
- General
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Three-dimensional holey-graphene/niobia composite architectures for ultrahigh-rate energy storage. / Sun, Hongtao; Mei, Lin; Liang, Junfei; Zhao, Zipeng; Lee, Chain; Fei, Huilong; Ding, Mengning; Lau, Jonathan; Li, Mufan; Wang, Chen; Xu, Xu; Hao, Guolin; Papandrea, Benjamin; Shakir, Imran; Dunn, Bruce; Huang, Yu; Duan, Xiangfeng.
In: Science, Vol. 356, No. 6338, 12.05.2017, p. 599-604.Research output: Contribution to journal › Article
TY - JOUR
T1 - Three-dimensional holey-graphene/niobia composite architectures for ultrahigh-rate energy storage
AU - Sun, Hongtao
AU - Mei, Lin
AU - Liang, Junfei
AU - Zhao, Zipeng
AU - Lee, Chain
AU - Fei, Huilong
AU - Ding, Mengning
AU - Lau, Jonathan
AU - Li, Mufan
AU - Wang, Chen
AU - Xu, Xu
AU - Hao, Guolin
AU - Papandrea, Benjamin
AU - Shakir, Imran
AU - Dunn, Bruce
AU - Huang, Yu
AU - Duan, Xiangfeng
PY - 2017/5/12
Y1 - 2017/5/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85019197469&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019197469&partnerID=8YFLogxK
U2 - 10.1126/science.aam5852
DO - 10.1126/science.aam5852
M3 - Article
AN - SCOPUS:85019197469
VL - 356
SP - 599
EP - 604
JO - Science
JF - Science
SN - 0036-8075
IS - 6338
ER -