Effect of electrode mixing conditions on the performance of lithium-ion batteries analyzed by fast Fourier transform electrochemical impedance spectroscopy

Hironori Nakajima, Tatsumi Kitahara, Yuta Higashinaka, Yusaku Nagata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

We have investigated the influence of mixing conditions during the positive electrode fabrication on the discharge performance and internal resistances under high rate discharge of a test lithium-ion battery at 30 °C, employing fast Fourier transform electrochemical impedance spectroscopy in-situ to minimize the change in the state of charge. The internal resistances are assigned to each component in the positive electrode by comparing with cross-sectional scanning electron micrographs. The mixings of the active material and conductive filler with too low rotating speed both before and after the addition of the binder and solvent, pre-mixing and slurry mixing, respectively, give smaller active contact area between agglomerated conductive filler and the active material, leading to larger interfacial resistance. The pre-mixing and slurry mixing under too high rotating speed both result in larger interfacial resistances due to poor contacts of agglomerated active material with the conductive filler and the electrolyte.

Original languageEnglish
Title of host publicationLithium-Ion Batteries
EditorsS. Meng, K. Amine, J. Wu
PublisherElectrochemical Society Inc.
Pages87-95
Number of pages9
Edition22
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2015
EventSymposium on Lithium-Ion Batteries - 2014 ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: Oct 5 2014Oct 9 2014

Publication series

NameECS Transactions
Number22
Volume64
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSymposium on Lithium-Ion Batteries - 2014 ECS and SMEQ Joint International Meeting
CountryMexico
CityCancun
Period10/5/1410/9/14

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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