Interfacial Spinel Local Interlocking Strategy Toward Structural Integrity in P3 Oxide Cathodes.
Jia-Yang LiHai-Yan HuHong-Wei LiYi-Feng LiuYu SuXin-Bei JiaLing-Fei ZhaoYa-Meng FanQin-Fen GuHang ZhangWei Kong PangYan-Fang ZhuJia-Zhao WangShi Xue DouShu-Lei ChouYao XiaoPublished in: ACS nano (2024)
P3-layered transition oxide cathodes have garnered considerable attention owing to their high initial capacity, rapid Na + kinetics, and less energy consumption during the synthesis process. Despite these merits, their practical application is hindered by the substantial capacity degradation resulting from unfavorable structural transformations, Mn dissolution and migration. In this study, we systematically investigated the failure mechanisms of P3 cathodes, encompassing Mn dissolution, migration, and the irreversible P3-O3' phase transition, culminating in severe structural collapse. To address these challenges, we proposed an interfacial spinel local interlocking strategy utilizing P3/spinel intergrowth oxide as a proof-of-concept material. As a result, P3/spinel intergrowth oxide cathodes demonstrated enhanced cycling performance. The effectiveness of suppressing Mn migration and maintaining local structure of interfacial spinel local interlocking strategy was validated through depth-etching X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and in situ synchrotron-based X-ray diffraction. This interfacial spinel local interlocking engineering strategy presents a promising avenue for the development of advanced cathode materials for sodium-ion batteries.
Keyphrases
- ion batteries
- high resolution
- ionic liquid
- molecular dynamics simulations
- electron transfer
- perovskite solar cells
- room temperature
- dual energy
- single molecule
- randomized controlled trial
- systematic review
- gestational age
- early onset
- working memory
- metal organic framework
- transition metal
- mass spectrometry
- high intensity
- magnetic resonance imaging
- computed tomography
- drug induced
- oxide nanoparticles
- solid state
- aqueous solution