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DOI | 10.1038/s41467-019-09864-w |
Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy | |
Kuppan, Saravanan1; Xu, Yahong2,3; Liu, Yijin2; Chen, Guoying1 | |
2019-05-20 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Understanding the reaction pathway and kinetics of solid-state phase transformation is critical in designing advanced electrode materials with better performance and stability. Despite the first-order phase transition with a large lattice mismatch between the involved phases, spinel LiMn1.5Ni0.5O4 is capable of fast rate even at large particle size, presenting an enigma yet to be understood. The present study uses advanced two-dimensional and three-dimensional nano-tomography on a series of well-formed LixMn(1.5)Ni(0.5)O(4) (0 <= x <= 1) crystals to visualize the mesoscale phase distribution, as a function of Li content at the sub-particle level. Inhomogeneity along with the coexistence of Li-rich and Li-poor phases are broadly observed on partially delithiated crystals, providing direct evidence for a concurrent nucleation and growth process instead of a shrinking-core or a particle-by-particle process. Superior kinetics of (100) facets at the vertices of truncated octahedral particles promote preferential delithiation, whereas the observation of strain-induced cracking suggests mechanical degradation in the material. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393295900001 |
WOS关键词 | VOLTAGE SPINEL CATHODES ; ION BATTERIES ; ABSORPTION SPECTROSCOPY ; MATERIAL LINI0.5MN1.5O4 ; OPERANDO ; LIFEPO4 ; TRANSITION ; NANOSCALE ; PARTICLES ; SURFACE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204373 |
专题 | 资源环境科学 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Energy Storage & Distributed Resources Div, Berkeley, CA 94720 USA; 2.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA; 3.Donghua Univ, Coll Mech Engn, Shanghai 200051, Peoples R China |
推荐引用方式 GB/T 7714 | Kuppan, Saravanan,Xu, Yahong,Liu, Yijin,et al. Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy[J]. NATURE COMMUNICATIONS,2019,8. |
APA | Kuppan, Saravanan,Xu, Yahong,Liu, Yijin,&Chen, Guoying.(2019).Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy.NATURE COMMUNICATIONS,8. |
MLA | Kuppan, Saravanan,et al."Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy".NATURE COMMUNICATIONS 8(2019). |
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