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

Lu, Jiming; Tian, Xiaohui; Zhou, Yingke; Zhu, Yanbin; Tang, Zhihao; Ma, Ben; Wu, Guan; Jiang, Tingting; Tu, Xiaofeng; Chen, George Z.

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.

Citation

Lu, J., Tian, X., Zhou, Y., Zhu, Y., Tang, Z., Ma, B., …Chen, G. Z. (2019). A novel “holey-LFP / graphene / holey-LFP” sandwich nanostructure with significantly improved rate capability for lithium storage. Electrochimica Acta, 320, Article 134566. https://doi.org/10.1016/j.electacta.2019.134566

• Journal Article Type: Article
• Acceptance Date: Jul 18, 2019
• Online Publication Date: Jul 19, 2019
• Publication Date: Oct 10, 2019
• Deposit Date: Oct 9, 2019
• Publicly Available Date: Jul 20, 2020
• Journal: Electrochimica Acta
• Print ISSN: 0013-4686
• Electronic ISSN: 0013-4686
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 320
• Article Number: 134566
• DOI: https://doi.org/10.1016/j.electacta.2019.134566
• Keywords: Sandwich nanostructure; Porous nanoplate; Graphene aerogel; LiFePO4
• Public URL: https://nottingham-repository.worktribe.com/output/2789488
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0013468619314112?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: A novel “holey-LFP / graphene / holey-LFP” sandwich nanostructure with significantly improved rate capability for lithium storage; Journal Title: Electrochimica Acta; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.electacta.2019.134566; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved.