气候变化领域集成服务门户(CCPortal): Synchrotron X-ray quantitative evaluation of transient deformation and damage phenomena in a single nickel-rich cathode particle

CCPortal

DOI	10.1039/d0ee02290j
	Synchrotron X-ray quantitative evaluation of transient deformation and damage phenomena in a single nickel-rich cathode particle
	Romano Brandt L.; Marie J.-J.; Moxham T.; Förstermann D.P.; Salvati E.; Besnard C.; Papadaki C.; Wang Z.; Bruce P.G.; Korsunsky A.M.
发表日期	2020
ISSN	1754-5692
起始页码	3556
结束页码	3566
卷号	13 期号:10
英文摘要	The performance and durability of Ni-rich cathode materials are controlled in no small part by their mechanical durability, as chemomechanical breakdown at the nano-scale leads to increased internal resistance and decreased storage capacity. The mechanical degradation is caused by the transient lithium diffusion processes during charge and discharge of layered oxide spherical cathode micro-particles, leading to highly anisotropic incompatible strain fields. Experimental characterisation of the transient mechanisms underlying crack and void formation requires the combination of very high resolution in space (sub-micron) and time (sub-second) domains without charge interruption. The present study is focused on sub-micron focused operando synchrotron X-ray diffraction and in situ Ptycho-Tomographic nano-scale imaging of a single nano-structured LiNi0.8Co0.1Mn0.1O2 core-shell particle during charge to obtain a thorough understanding of the anisotropic deformation and damage phenomena at a particle level. Preferential grain orientation within the shell of a spherical secondary cathode particle provides improved lithium transport but is also associated with spatially varying anisotropic expansion of the hexagonal unit cell in the c-axis and contraction in the a-axis. These effects were resolved in relation to the grain orientation, and the link established with the nucleation and growth of intergranular cracks and voids that causes electrical isolation of active cathode material. Coupled multi-physics Finite Element Modelling of diffusion and deformation inside a single cathode particle during charge and discharge was validated by comparison with experimental evidence and allowed unequivocal identification of key mechanical drivers underlying Li-ion battery degradation. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Anisotropy; Cathode materials; Cobalt compounds; Cracks; Deformation; Durability; Lithium compounds; Lithium-ion batteries; Manganese compounds; Nanotechnology; Nickel; Nickel compounds; Textures; Active cathode materials; Anisotropic deformation; Anisotropic expansion; Experimental evidence; Finite element modelling; Mechanical degradation; Quantitative evaluation; Synchrotron x ray diffraction; Cathodes
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162741
作者单位	Korsunsky Group, Multi-Beam Laboratory for Engineering Microscopy (MBLEM), Department of Engineering Science, Oxford, OX1 3PJ, United Kingdom; Department of Materials, University of Oxford Parks Road, Oxford, OX1 3PH, United Kingdom; Polytechnic Department of Engineering and Architecture (DPIA), University of Udine, Via delle Scienze 206, Udine, 33100, Italy; Department of Chemistry, University of Oxford South, Parks Road, Oxford, OX1 3QZ, United Kingdom; Henry Royce Institute, Parks Road, Oxford, OX1 3PH, United Kingdom; Faraday Institution, Quad One, Becquerel Avenue, United Kingdom
推荐引用方式 GB/T 7714	Romano Brandt L.,Marie J.-J.,Moxham T.,et al. Synchrotron X-ray quantitative evaluation of transient deformation and damage phenomena in a single nickel-rich cathode particle[J],2020,13(10).
APA	Romano Brandt L..,Marie J.-J..,Moxham T..,Förstermann D.P..,Salvati E..,...&Korsunsky A.M..(2020).Synchrotron X-ray quantitative evaluation of transient deformation and damage phenomena in a single nickel-rich cathode particle.Energy and Environmental Science,13(10).
MLA	Romano Brandt L.,et al."Synchrotron X-ray quantitative evaluation of transient deformation and damage phenomena in a single nickel-rich cathode particle".Energy and Environmental Science 13.10(2020).