Multiple imaging mode X-ray computed tomography for distinguishing active and inactive phases in lithium-ion battery cathodes

被引：61

作者：

Babu, Siddharth Komini ^{[1
]}

Mohamed, Alexander I. ^{[2
]}

Whitacre, Jay F. ^{[2
,3
]}

Litster, Shawn ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA

[2] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

[3] Carnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA 15213 USA

来源：

JOURNAL OF POWER SOURCES | 2015年 / 283卷

基金：

美国国家科学基金会;

关键词：

X-ray computed tomography; 3D reconstruction; Li-ion battery; Conductive additive; Lithium cobalt oxide; Binder; 3-DIMENSIONAL MICROSTRUCTURE; ELECTRODE;

D O I：

10.1016/j.jpowsour.2015.02.086

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper presents the use of nanometer scale resolution X-ray computed tomography (nano-CT) in the three-dimensional (3D) imaging of a Li-ion battery cathode, including the separate volumes of active material, binder plus conductive additive, and pore. The different high and low atomic number (Z) materials are distinguished by sequentially imaging the lithium cobalt oxide electrode in absorption and then Zernike phase contrast modes. Morphological parameters of the active material and the additives are extracted from the 3D reconstructions, including the distribution of contact areas between the additives and the active material. This method could provide a better understanding of the electric current distribution and structural integrity of battery electrodes, as well as provide detailed geometries for computational models. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：314 / 319

页数：6

共 18 条

[1] 3D analysis of a LiCoO2-Li(Ni1/3Mn1/3Co1/3)O2 Li-ion battery positive electrode using x-ray nano-tomography [J].