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., Wu, G., Jiang, T., Tu, X., & 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: 1873-3859
• 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.
• Contract Date: Oct 9, 2019