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. 2018 Jun 22;9:2437. doi: 10.1038/s41467-018-04862-w

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Cycling performance and cracks of LiNi_0.6Mn_0.2Co_0.2O₂. a Capacity decay and b corresponding charge–discharge voltage profile evolution at cycling window 2.7–4.8 V. Cross-sectional high angle dark field (HAADF) images from (c) pristine sample d, e after 100 cycles at 2.7–4.5 V, f–h after 100 cycles at 2.7–4.8 V. Red arrow in (d) highlights intergranular cracks formed during cycling. Red arrows in (f, g) highlight some intragranular cracks within primary particles. Yellow arrows in (g, h) highlight incubation cracks. The scale bars are 500 nm in (c–f), 10 nm in (g) and 2 nm in (h)