NIMTE OpenIR  > 2018专题
Localized concentration reversal of lithium during intercalation into nanoparticles
Zhang, Wei; Yu, Hui-Chia; Wu, Lijun; Liu, Hao; Abdellahi, Aziz; Qiu, Bao; Bai, Jianming; Orvananos, Bernardo; Strobridge, Fiona C.; Zhou, Xufeng; Liu, Zhaoping; Ceder, Gerbrand; Zhu, Yimei; Thornton, Katsuyo; Grey, Clare P.; Wang, Feng
2018
发表期刊SCIENCE ADVANCES
卷号4期号:1
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.
关键词Battery Electrodes Solid-solution Lifepo4 Nanoparticles Cathode Materials Phase-transition Miscibility Gap Dynamics Lixfepo4 Energy Fepo4
学科领域Chemistry
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16917
专题2018专题
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GB/T 7714
Zhang, Wei,Yu, Hui-Chia,Wu, Lijun,et al. Localized concentration reversal of lithium during intercalation into nanoparticles[J]. SCIENCE ADVANCES,2018,4(1).
APA Zhang, Wei.,Yu, Hui-Chia.,Wu, Lijun.,Liu, Hao.,Abdellahi, Aziz.,...&Wang, Feng.(2018).Localized concentration reversal of lithium during intercalation into nanoparticles.SCIENCE ADVANCES,4(1).
MLA Zhang, Wei,et al."Localized concentration reversal of lithium during intercalation into nanoparticles".SCIENCE ADVANCES 4.1(2018).
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