Codoped Holey Graphene Aerogel by Selective Etching for High-Performance Sodium-Ion Storage

Zhao, Jin; Zhang, Yi-Zhou; Chen, Jianyu; Zhang, Wenli; Yuan, Du; Chua, Rodney; Alshareef, Husam N.; Ma, Yanwen

Codoped Holey Graphene Aerogel by Selective Etching for High-Performance Sodium-Ion Storage

Embargo End Date

2021-03-20

Type

Article

Authors

Zhao, Jin
Zhang, Yi-Zhou
Chen, Jianyu
Zhang, Wenli

Yuan, Du
Chua, Rodney
Alshareef, Husam N.

Ma, Yanwen

KAUST Department

Functional Nanomaterials and Devices Research Group
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division

Online Publication Date

2020-03-20

Print Publication Date

2020-05

Date

2020-03-20

Submitted Date

2020-01-10

Abstract

The pursuit of more efficient carbon-based anodes for sodium-ion batteries (SIBs) prepared from facile and economical methods is a very important endeavor. Based on the crystallinity difference within carbon materials, herein, a low-temperature selective burning method is developed for preparing oxygen and nitrogen codoped holey graphene aerogel as additive-free anode for SIBs. By selective burning of a mixture of graphene and low-crystallinity carbon at 450 °C in air, an elastic porous graphene monolith with abundant holes on graphene sheets and optimized crystallinity is obtained. These structural characteristics lead to an additive-free electrode with fast charge (ions and electrons) transfer and more abundant Na+ storage active sites. Moreover, the heteroatom oxygen/nitrogen doping favors large interlayer distance for rapid Na+ insertion/extraction and provides more active sites for high capacitive contribution. The optimized sample exhibits superior sodium-ion storage capability, i.e., high specific capacity (446 mAh g−1 at 0.1 A g−1), ultrahigh rate capability (189 mAh g−1 at 10 A g−1), and long cycle life (81.0% capacity retention after 2000 cycles at 5 A g−1). This facile and economic strategy might be extended to fabricating other superior carbon-based energy storage materials.

Citation

Zhao, J., Zhang, Y.-Z., Chen, J., Zhang, W., Yuan, D., Chua, R., … Ma, Y. (2020). Codoped Holey Graphene Aerogel by Selective Etching for High-Performance Sodium-Ion Storage. Advanced Energy Materials, 2000099. doi:10.1002/aenm.202000099

Acknowledgements

J.Z. and Y.Z.Z. contributed equally to this work. This work was jointly supported by NSFC (51772157, 91963119, and 21805136), Keypoint Research and Invention Program of Jiangsu Province (BE2018010-3), Natural Science Foundation of Jiangsu Province (BK20170999), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Synergistic Innovation Center for Organic Electronics and Information Displays, Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, YX030003), National Natural Science Foundation of China (21805136). Research reported in this publication was partially supported by King Abdullah University of Science and Technology (KAUST).