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DOI | 10.1038/s41467-019-11308-4 |
Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries | |
Yan, Pengfei1; Zheng, Jianming2; Gu, Meng1; Xiao, Jie2; Zhang, Ji-Guang2; Wang, Chong-Min1 | |
2019-08-01 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | LiNi1/3Mn1/3Co1/3O2-layered cathode is often fabricated in the form of secondary particles, consisting of densely packed primary particles. This offers advantages for high energy density and alleviation of cathode side reactions/corrosions, but introduces drawbacks such as intergranular cracking. Here, we report unexpected observations on the nucleation and growth of intragranular cracks in a commercial LiNi1/3Mn1/3Co1/3O2 cathode by using advanced scanning transmission electron microscopy. We find the formation of the intragranular cracks is directly associated with high-voltage cycling, an electrochemically driven and diffusion-controlled process. The intragranular cracks are noticed to be characteristically initiated from the grain interior, a consequence of a dislocation-based crack incubation mechanism. This observation is in sharp contrast with general theoretical models, predicting the initiation of intragranular cracks from grain boundaries or particle surfaces. Our study emphasizes that maintaining structural stability is the key step towards high-voltage operation of layered-cathode materials. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000392095500001 |
WOS关键词 | TRANSITION-METAL OXIDES ; ELECTRON-MICROSCOPY ; SURFACE RECONSTRUCTION ; COMPOSITE CATHODE ; PHASE-TRANSITION ; STRESS EVOLUTION ; PARTICLES ; LIFEPO4 ; INTERCALATION ; DEGRADATION |
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/204477 |
专题 | 资源环境科学 |
作者单位 | 1.Pacific Northwest Natl Lab, Environm Mol Sci Lab, 902 Battelle Blvd, Richland, WA 99352 USA; 2.Pacific Northwest Natl Lab, Energy & Environm Directorate, 902 Battelle Blvd, Richland, WA 99352 USA |
推荐引用方式 GB/T 7714 | Yan, Pengfei,Zheng, Jianming,Gu, Meng,et al. Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries[J]. NATURE COMMUNICATIONS,2019,8. |
APA | Yan, Pengfei,Zheng, Jianming,Gu, Meng,Xiao, Jie,Zhang, Ji-Guang,&Wang, Chong-Min.(2019).Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries.NATURE COMMUNICATIONS,8. |
MLA | Yan, Pengfei,et al."Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries".NATURE COMMUNICATIONS 8(2019). |
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