期刊
EXTREME MECHANICS LETTERS
卷 9, 期 -, 页码 495-502出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.eml.2016.03.002
关键词
NMC cathode; Grid indentation; Statistical analysis; Mechanical properties; Batteries
资金
- Purdue University
- US Department of Energy (DOE) [DE-AC05-00OR22725]
- Office of Energy Efficiency and Renewable Energy's Vehicle Technologies Office
Electrodes in commercial rechargeable batteries are microscopically heterogeneous materials. The constituent components, including active materials, polymeric binders, and porous conductive matrix, often have large variation in their mechanical properties, making the mechanical characterization of composite electrodes a challenging task. In a model system of LiNi0.5Mn0.3Co0.2O2 cathode, we employ the instrumented grid indentation to determine the elastic modulus and hardness of the constituent phases. The approach relies on a large array of nanoindentation experiments and statistical analysis of the resulting data provided that the maximum indentation depth is carefully chosen. The statistically extracted properties of the active particles and the surrounding medium are in good agreement with the tests of targeted indentation at selected sites. The combinatory technique of grid indentation and statistical deconvolution represents a fast and reliable route to quantify the mechanical properties of composite electrodes that feed the parametric input for the mechanics models. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据