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Facile synthesis of nano-Ag decorated Nb2O5 on the 3D graphene framework for high-performance lithium storage
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Yu, Wan-Jing, Liu, Zhiyuan, Dai, Qiongyu, Tsiamtsouri, Maria A., An, Tianhui and Tong, Hui (2023) Facile synthesis of nano-Ag decorated Nb2O5 on the 3D graphene framework for high-performance lithium storage. Chemical Engineering Science, 265 . 118215. doi:10.1016/j.ces.2022.118215 ISSN 0009-2509.
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Official URL: http://dx.doi.org/10.1016/j.ces.2022.118215
Abstract
Niobium-oxide based materials are well-known in electrochemical energy area because of their unique structural advantage, which can realize fast ion insertion/extraction and interfacial pseudo-capacitance effects. However, instinct poor electrical conductivity and terrible volume change of Nb2O5 under lithiation/delithiation have hindered its practical application. Here, a three-dimensional (3D) graphene network has been constructed by a simple hydrothermal reaction and utilized to buffer the severe structural variation of Nb2O5. Meanwhile, silver nanoparticles have been incorporated into this 3D structure through silver-mirror reaction, by which the charge-transfer ability of the composite (Ag-Nb2O5@rGO) can be significantly improved. The obtained Ag-Nb2O5@rGO can contribute a charge capacity of ∼ 208.0 mAh/g at 0.5C and ∼ 106.6 mAh/g up to 20C. Meanwhile, superior cyclic performance with ∼ 80 % capacity retention after 500 cycles at 2.5C can be achieved. This demonstrates that the Ag-Nb2O5@rGO composite can work as a high-performance anode for electrochemical energy devices.
| Item Type: | Journal Article | ||||||||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
| Journal or Publication Title: | Chemical Engineering Science | ||||||||||||
| Publisher: | Elsevier | ||||||||||||
| ISSN: | 0009-2509 | ||||||||||||
| Official Date: | 16 January 2023 | ||||||||||||
| Dates: |
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| Volume: | 265 | ||||||||||||
| Number of Pages: | 10 | ||||||||||||
| Article Number: | 118215 | ||||||||||||
| DOI: | 10.1016/j.ces.2022.118215 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
| Copyright Holders: | Elsevier Ltd. | ||||||||||||
| RIOXX Funder/Project Grant: |
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