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Title: Three-Dimensional Visualization of Conductive Domains in Battery Electrodes with Contrast-Enhancing Nanoparticles

Journal Article · · ACS Applied Energy Materials
 [1];  [2];  [3]; ORCiD logo [3];  [4];  [1]; ORCiD logo [1]
  1. Drexel Univ., Philadelphia, PA (United States). Dept. of of Chemical and Biological Engineering
  2. Sigray, Incorporated, Concord, CA (United States)
  3. Univ. College London, (United Kingdom). Dept. of Chemical Engineering, Electrochemical Innovation Lab.
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Div.
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Typically, replacing conductive carbon black with commercial carbon-coated iron nanoparticles yields an effective contrast-enhancing agent to differentiate between active material, conductive additive, and binder in lithium-ion battery electrodes. Nano-XCT resolved the carbon-binder domain with 126 nm voxel resolution, showing partial coatings around the active material particles and interparticle bridges. In a complementary analysis, SEM/EDS determined individual distributions of conductive additives and binder. Surprisingly, the contrast-enhancing agents showed that the effect of preparation parameters on the heterogeneity of conductive additives was weaker than on the binder. Incorporation of such contrast-enhancing additives can improve understanding of processing-structure-function relationships in a multitude of devices for energy conversion and storage.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1526539
Journal Information:
ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 9 Vol. 1; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (27)

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A Combination of X-Ray Tomography and Carbon Binder Modeling: Reconstructing the Three Phases of LiCoO 2 Li-Ion Battery Cathodes journal January 2014
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Three-dimensional electrochemical Li-ion battery modelling featuring a focused ion-beam/scanning electron microscopy based three-phase reconstruction of a LiCoO2 cathode journal January 2014
Mechanical and Electrochemical Response of a LiCoO2 Cathode using Reconstructed Microstructures journal February 2016
Experimental investigation into battery electrode surfaces: The distribution of liquid at the surface and the emptying of pores during drying journal May 2017
Measurement of three-dimensional microstructure in a LiCoO2 positive electrode journal April 2011
Three-dimensional morphological measurements of LiCoO2 and LiCoO2/Li(Ni1/3Mn1/3Co1/3)O2 lithium-ion battery cathodes journal April 2013
Multiple imaging mode X-ray computed tomography for distinguishing active and inactive phases in lithium-ion battery cathodes journal June 2015
Influence of dry mixing and distribution of conductive additives in cathodes for lithium ion batteries journal August 2015
Investigation of film solidification and binder migration during drying of Li-Ion battery anodes journal June 2016
Investigation of binder distribution in graphite anodes for lithium-ion batteries journal February 2017
Short-range contacts govern the performance of industry-relevant battery cathodes journal May 2018
The Ascent of 3D X-ray Microscopy in the Laboratory journal March 2013
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Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode journal July 2016
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Three-Dimensional Reconstruction of a LiCoO2 Li-Ion Battery Cathode journal January 2012
Role of Plastic Deformation of Binder on Stress Evolution during Charging and Discharging in Lithium-Ion Battery Negative Electrodes journal January 2013
Multi Length Scale Microstructural Investigations of a Commercially Available Li-Ion Battery Electrode journal January 2012
X-ray computed tomography in Zernike phase contrast mode at 8 keV with 50-nm resolution using Cu rotating anode X-ray source journal January 2007

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