The influence of polyvinylidene fluoride (PVDF) binder properties on LiNi0.33Co0.33Mn0.33O2 (NMC) electrodes made by a dry-powder-coating process

Ming Wang, Jiazhi Hu, Yikai Wang, Yang Tse Cheng

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We have investigated the effects of the molecular weight of the polyvinylidene fluoride (PVDF) binder on the electrochemical performance and mechanical integrity of the LiNi0.33Co0.33Mn0.33O2 (NMC) electrodes made by a dry-powder-coating process. The microstructure, binding strength, and electrochemical behavior of the electrodes made with two types of PVDF polymers were compared. We show that a thin PVDF layer can form on the NMC particle surface after heating the PVDF to above its melting point. The microstructure and porosity of the PVDF layer depend strongly on the molecular weight of the PVDFs. With increasing molecular weight, the PVDF layer becomes more porous, improving the high-rate capacity without decreasing binding strength and long-term cycling performance of the electrodes.

Original languageEnglish
Pages (from-to)A2151-A2157
JournalJournal of the Electrochemical Society
Volume166
Issue number10
DOIs
StatePublished - 2019

Bibliographical note

Funding Information:
We would like to thank Dr. Steven Baxter, Dr. Ramin Amin-Sanayei, and Dr. Wensheng He of Arkema Inc. for helpful discussions and for providing some of the PVDF materials used in this work. We would thank Adam Price of Unviersity of Kentucky for helping with the surface roughness measurement. We would also thank Mohammad Saiful Islam and Nicholas Cprek of University of Kentucky and two visiting students, Dawei Li from Shanghai University and Vincent Kelly from Kentucky State University, for technical assistance. This work was supported by the National Science Foundation Award 1355438 “Powering the Kentucky Bioeconomy for a Sustainable Future.”

Funding Information:
We would like to thank Dr. Steven Baxter, Dr. Ramin Amin-Sanayei, and Dr. Wensheng He of Arkema Inc. for helpful discussions and for providing some of the PVDF materials used in this work. We would thank Adam Price of Unviersity of Kentucky for helping with the surface roughness measurement. We would also thank Mohammad Saiful Islam and Nicholas Cprek of University of Kentucky and two visiting students, Dawei Li from Shanghai University and Vincent Kelly from Kentucky State University, for technical assistance. This work was supported by the National Science Foundation Award 1355438 ?Powering the Kentucky Bioeconomy for a Sustainable Future.?

Publisher Copyright:
© The Author(s) 2019.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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