A novel “holey-LFP / graphene / holey-LFP” sandwich nanostructure with significantly improved rate capability for lithium storage

Lu, Jiming and Tian, Xiaohui and Zhou, Yingke and Zhu, Yanbin and Tang, Zhihao and Ma, Ben and Wu, Guan and Jiang, Tingting and Tu, Xiaofeng and Chen, George Z. (2019) A novel “holey-LFP / graphene / holey-LFP” sandwich nanostructure with significantly improved rate capability for lithium storage. Electrochimica Acta, 320 . 134566/1-134566/31. ISSN 0013-4686

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Abstract

The development of high-performance and new-structure electrode materials is vital for the wide application of rechargeable lithium batteries in electric vehicles. In this work, we design a special composite electrode structure with the macroporous three-dimensional graphene areogel framework supporting mesoporous LiFePO4 nanoplate. It is realized using a simple sol-gel deposition method. The highly conductivity graphene nanosheets assemble into an interconnected three-dimensional macroporous areogel framework, while LiFePO4 grows along the graphene nanosheets and generates a mesoporous nanoplate structure. In comparison with LiFePO4, this unique sandwich nanostructure offers a greatly increased electronic conductivity thanks to the framework of graphene nanosheets. Also, the bimodal porous structure of the composite remarkably increases the interface between the electrode/electrolyte and facilitates the transport of Li+ throughout the electrode, enabling the superior specific capacity, rate characteristic and cyclic retention.

Item Type: Article
Additional Information: This publication is under Global University Publication Licence.
Keywords: Sandwich nanostructure;Porous nanoplate;Graphene aerogel;LiFePO4
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Chemical and Environmental Engineering
Identification Number: https://doi.org/10.1016/j.electacta.2019.134566
Depositing User: Zhou, Elsie
Date Deposited: 28 Aug 2019 10:08
Last Modified: 19 Jul 2020 04:30
URI: http://eprints.nottingham.ac.uk/id/eprint/57313

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