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Title: Analysis of geometric and electrochemical characteristics of lithium cobalt oxide electrode with different packing densities

Journal Article · · Journal of Power Sources
 [1];  [2];  [1];  [1];  [1];  [3];  [3];  [4];  [5];  [1]
  1. Indiana Univ. and Purdue Univ., Indianapolis, IN (United States). Dept. of Mechanical Engineering
  2. Indiana Univ. and Purdue Univ., Indianapolis, IN (United States). Dept. of Mechanical Engineering; Shanghai Jiao Tong Univ. (China). School of Materials Science and Engineering
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  4. Univ. of Illinois, Urbana, IL (United States). Beckman Inst.
  5. Ulsan National Inst. of Science and Technology (UNIST) (Republic of Korea). School of Energy and Chemical Engineering

In order to investigate geometric and electrochemical characteristics of Li ion battery electrode with different packing densities, lithium cobalt oxide (LiCoO2) cathode electrodes were fabricated from a 94:3:3 (wt%) mixture of LiCoO2, polymeric binder, and super-P carbon black and calendered to different densities. A synchrotron X-ray nano-computed tomography system with a spatial resolution of 58.2 nm at the Advanced Photon Source of the Argonne National Laboratory was employed to obtain three dimensional morphology data of the electrodes. The morphology data were then quantitatively analyzed to characterize their geometric properties, such as porosity, tortuosity, specific surface area, and pore size distribution. The geometric and electrochemical analysis reveal that high packing density electrodes have smaller average pore size and narrower pore size distribution, which improves the electrical contact between carbon-binder matrix and LiCoO2 particles. The better contact improves the capacity and rate capability by reducing the possibility of electrically isolated LiCoO2 particles and increasing the electrochemically active area. The results show that increase of packing density results in higher tortuosity, but electrochemically active area is more crucial to cell performance than tortuosity at up to 3.6 g/cm3 packing density and 4 C rate.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1393185
Alternate ID(s):
OSTI ID: 1398548
Journal Information:
Journal of Power Sources, Vol. 328, Issue C; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (7)

Li 4 Ti 5 O 12 : A Visible-to-Infrared Broadband Electrochromic Material for Optical and Thermal Management journal July 2018
Analysis of the 3D microstructure of experimental cathode films for lithium-ion batteries under increasing compaction: ANALYSIS OF THE 3D MICROSTRUCTURE OF EXPERIMENTAL CATHODE FILMS journal August 2018
Reticulate Dual-Nanowire Aerogel for Multifunctional Applications: a High-Performance Strain Sensor and a High Areal Capacity Rechargeable Anode journal January 2019
Editors' Choice—Mesoscale Analysis of Conductive Binder Domain Morphology in Lithium-Ion Battery Electrodes journal January 2018
Analytical modeling and simulation of porous electrodes: Li-ion distribution and diffusion-induced stress journal August 2017
Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes journal December 2018
Li4Ti5O12: A Visible-to-Infrared Broadband Electrochromic Material for Optical and Thermal Management text January 2019

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