Localized concentration reversal of lithium during intercalation into nanoparticles
文献类型：期刊论文
| 作者 | Ceder, Gerbrand; Zhu, Yimei; Thornton, Katsuyo; Wang, Feng; Grey, Clare P.; Zhang, Wei; Yu, Hui-Chia; Wu, Lijun; Liu, Hao; Abdellahi, Aziz |
| 刊名 | SCIENCE ADVANCES
 |
| 出版日期 | 2018 |
| 卷号 | 4期号:1 |
| 关键词 | Battery Electrodes Solid-solution Lifepo4 Nanoparticles Cathode Materials Phase-transition Miscibility Gap Dynamics Lixfepo4 Energy Fepo4 |
| 英文摘要 | Nanoparticulate electrodes, such as LixFePO4, have unique advantages over their microparticulate counterparts for the applications in Li-ion batteries because of the shortened diffusion path and access to nonequilibrium routes for fast Li incorporation, thus radically boosting power density of the electrodes. However, how Li intercalation occurs locally in a single nanoparticle of such materials remains unresolved because real-time observation at such a fine scale is still lacking. We report visualization of local Li intercalation via solid-solution transformation in individual LixFePO4 nano-particles, enabled by probing sub-angstrom changes in the lattice spacing in situ. The real-time observation reveals inhomogeneous intercalation, accompanied with an unexpected reversal of Li concentration at the nanometer scale. The origin of the reversal phenomenon is elucidated through phase-field simulations, and it is attributed to the presence of structurally different regions that have distinct chemical potential functions. The findings from this study provide a new perspective on the local intercalation dynamics in battery electrodes. |
| 学科主题 | Chemistry |
| 语种 | 英语 |
| 公开日期 | 2018-12-04 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/16917]  |
| 专题 | 2018专题 |
| 推荐引用方式 GB/T 7714 | Ceder, Gerbrand,Zhu, Yimei,Thornton, Katsuyo,et al. Localized concentration reversal of lithium during intercalation into nanoparticles[J]. SCIENCE ADVANCES,2018,4(1). |
| APA | Ceder, Gerbrand.,Zhu, Yimei.,Thornton, Katsuyo.,Wang, Feng.,Grey, Clare P..,...&Liu, Zhaoping.(2018).Localized concentration reversal of lithium during intercalation into nanoparticles.SCIENCE ADVANCES,4(1). |
| MLA | Ceder, Gerbrand,et al."Localized concentration reversal of lithium during intercalation into nanoparticles".SCIENCE ADVANCES 4.1(2018). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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