Al-based metal organic framework derived self-assembled carbon nanosheets as innovative anodes for Li- and Na-ion batteries
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Accepted version
Supplementary data
Date
2019-12-20
Authors
Zeng, Xie-Rong
Jin, Wen-Wu
Li, He-Jun
Inguva, Saikumar
Zhang, Qi
Zeng, Shao-Zhong
Xu, Guo-Zhong
Zou, Ji-Zhao
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing
Published Version
Abstract
Functional modification and structural design of carbon electrode materials are considered as a cost-effective method to improve their electrochemical performance. In this study, a solvothermal method is applied to realize self-assembly of the metal-organic framework. After simple carbonization and acid treatment, carbon nanosheets with 2D adjustable defective sub-units are successfully prepared for the first time. It is found that carbonization temperature has a significant effect on the carbon skeleton structure. The optimal nanostructures with large specific surface area and appropriate pore size distribution make self-assembled carbon nanosheets having excellent Li/Na-ion storage properties. In addition, the adjustable carbon skeleton structure can effectively avoid irreversible damage when charge–discharge cycles. For Li-ion batteries, a specific capacity of 825 mAh g−1 is achieved after 100 cycles at 100 mA g–1, while for Na-ion batteries a specific capacity of 193 mAh g−1 is observed after 100 cycles at 100 mA g–1. Moreover, for Na-ion batteries, even at a high rate of 1000 mA g–1 the material delivers a specific capacity of 109.5 mAh g−1 after 3500 cycles.
Description
Keywords
Porous carbon nanosheets , Nanostructure , 2D-MOF , Li-ion , Na-ion
Citation
Zeng, X.-R., Jin, W.-W., Li, H.-J., Inguva, S., Zhang, Q., Zeng, S.-Z., Xu, G.-Z. and Zou, J.-Z. (2020) 'Al-based metal organic framework derived self-assembled carbon nanosheets as innovative anodes for Li- and Na-ion batteries', Nanotechnology, 31(15), 155602 (11 pp). doi: 10.1088/1361-6528/ab647b