UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Operando Bragg Coherent Diffraction Imaging of LiNi₀.₈Mn₀.₁Co₀.₁O₂ Primary Particles within Commercially Printed NMC811 Electrode Sheets

Estandarte, AKC; Diao, J; Llewellyn, AV; Jnawali, A; Heenan, TMM; Daemi, SR; Bailey, JJ; ... Shearing, PR; + view all (2020) Operando Bragg Coherent Diffraction Imaging of LiNi₀.₈Mn₀.₁Co₀.₁O₂ Primary Particles within Commercially Printed NMC811 Electrode Sheets. ACS Nano 10.1021/acsnano.0c08575. (In press).

[img] Text
Heenan_ShearingBCDI-clean.pdf - Accepted version
Access restricted to UCL open access staff until 24 December 2021.

Download (1MB)

Abstract

Due to complex degradation mechanisms, disparities between the theoretical and practical capacities of lithium-ion battery cathode materials persist. Specifically, Ni-rich chemistries such as LiNi0.8Mn0.1Co0.1O2 (or NMC811) are one of the most promising choices for automotive applications; however, they continue to suffer severe degradation during operation that is poorly understood, thus challenging to mitigate. Here we use operando Bragg coherent diffraction imaging for 4D analysis of these mechanisms by inspecting the individual crystals within primary particles at various states of charge (SoC). Although some crystals were relatively homogeneous, we consistently observed non-uniform distributions of inter- and intracrystal strain at all measured SoC. Pristine structures may already possess heterogeneities capable of triggering crystal splitting and subsequently particle cracking. During low-voltage charging (2.7-3.5 V), crystal splitting may still occur even during minimal bulk deintercalation activity; and during discharging, rotational effects within parallel domains appear to be the precursor for the nucleation of screw dislocations at the crystal core. Ultimately, this discovery of the central role of crystal grain splitting in the charge/discharge dynamics may have ramifications across length scales that affect macroscopic performance loss during real-world battery operation.

Type: Article
Title: Operando Bragg Coherent Diffraction Imaging of LiNi₀.₈Mn₀.₁Co₀.₁O₂ Primary Particles within Commercially Printed NMC811 Electrode Sheets
Location: United States
DOI: 10.1021/acsnano.0c08575
Publisher version: https://doi.org/10.1021/acsnano.0c08575
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: CDI, Li ion, NMC811, X-ray, electric vehicle, operando, synchrotron
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10118641
Downloads since deposit
2Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item