Doping Regulation Stabilizing δ-MnO2 Cathode for High-Performance Aqueous Aluminium-ion Batteries
Article
Chen, Shuimei, Kong, Yueqi, Tang, Cheng, Gadelhak, Nashaat Ahmed, Nanjundan, Ashok Kumar, Du, Aijun, Yu, Chengzhong and Huang, Xiaodan. 2024. "Doping Regulation Stabilizing δ-MnO2 Cathode for High-Performance Aqueous Aluminium-ion Batteries
." Small. 20 (32). https://doi.org/10.1002/smll.202312229
Article Title | Doping Regulation Stabilizing δ-MnO2 Cathode for High-Performance Aqueous Aluminium-ion Batteries |
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ERA Journal ID | 3432 |
Article Category | Article |
Authors | Chen, Shuimei, Kong, Yueqi, Tang, Cheng, Gadelhak, Nashaat Ahmed, Nanjundan, Ashok Kumar, Du, Aijun, Yu, Chengzhong and Huang, Xiaodan |
Journal Title | Small |
Journal Citation | 20 (32) |
Article Number | 2312229 |
Number of Pages | 9 |
Year | 2024 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 1613-6810 |
1613-6829 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/smll.202312229 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/smll.202312229 |
Abstract | δ-MnO2 is a promising cathode material for aqueous aluminium-ion batteries (AAIBs) for its layered crystalline structure with large interlayer spacing. However, the excellent Al ion storage performance of δ-MnO2 cathode remains elusive due to the frustrating structural collapse during the intercalation of high ionic potential Al ion species. Here, it is discovered that introducing heterogeneous metal dopants with high bond dissociation energy when bonded to oxygen can significantly reinforce the structural stability of δ-MnO2 frameworks. This reinforcement translates to stable cycling properties and high specific capacity in AAIBs. Vanadium-doped δ-MnO2 (V-δ-MnO2) can deliver a high specific capacity of 518 mAh g−1 at 200 mA g−1 with remarkable cycling stability for 400 cycles and improved rate capabilities (468, 339, and 285 mAh g−1 at 0.5, 1, and 2 A g−1, respectively), outperforming other doped δ-MnO2 materials and the reported AAIB cathodes. Theoretical and experimental studies indicate that V doping can substantially improve the cohesive energy of δ-MnO2 lattices, enhance their interaction with Al ion species, and increase electrical conductivity, collectively contributing to high ion storage performance. These findings provide inspiration for the development of high-performance cathodes for battery applications. |
Keywords | aqueous aluminium-ion batteries |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 340301. Inorganic materials (incl. nanomaterials) |
Byline Affiliations | University of Queensland |
Queensland University of Technology | |
School of Engineering | |
Centre for Future Materials |
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