A Cylindrical Cell for Operando Neutron Diffraction of Li-Ion Battery Electrode Materials

Frontiers in Energy Research

Vitoux, Laura¹  Reichardt, Martin² 

[1] Electrochemisty Laboratory, Paul Scherrer Institute, Switzerland;Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Switzerland

关键词: Oper;    o neutron diffraction;    Li-ion batteries;    LiNi0.6Co0.2Mn0.2O2;    cylindrical cell;    Long-term cycling;    Rietveld refinement;   

DOI  :  10.3389/fenrg.2018.00076

学科分类：能源（综合）

来源: Frontiers

【 摘 要 】

Neutron diffraction is a powerful technique to localize and quantity lithium in battery electrode materials. However, obtaining high-quality Operando neutron diffraction data is challenging because it requires achieving good electrochemical performance while cycling a large amount of active material to ensure optimal signal-to-noise ratios. We have developed a cylindrical cell specifically suited for operando neutron studies, and used it to investigate the structural changes in the Ni-rich LiNi0.6Co0.2Mn0.2O2 cathode material during cycling between 2.5 and 4.3 V vs Li+/Li. The cell demonstrates reliable electrochemical performance, even after long-term cycling, and the important crystal structure parameters of the active material, including Li occupancy, could be successfully refined with the Rietveld method using neutron diffraction data collected in operando after appropriate background subtraction.

【 授权许可】

CC BY