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

doi:10.1149/2.1171910jes

The influence of polyvinylidene fluoride (PVDF) binder properties on LiNi_0.33Co_0.33Mn_0.33O₂ (NMC) electrodes made by a dry-powder-coating process

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

Research output: Contribution to journal › Article › peer-review

45 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 LiNi_0.33Co_0.33Mn_0.33O₂ (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 language	English
Pages (from-to)	A2151-A2157
Journal	Journal of the Electrochemical Society
Volume	166
Issue number	10
DOIs	https://doi.org/10.1149/2.1171910jes
State	Published - 2019

Bibliographical note

Publisher Copyright:
© The Author(s) 2019.

ASJC Scopus subject areas

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/2.1171910jes

Cite this

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

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.",

author = "Ming Wang and Jiazhi Hu and Yikai Wang and Cheng, {Yang Tse}",

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T1 - The influence of polyvinylidene fluoride (PVDF) binder properties on LiNi0.33Co0.33Mn0.33O2 (NMC) electrodes made by a dry-powder-coating process

AU - Wang, Ming

AU - Hu, Jiazhi

AU - Wang, Yikai

AU - Cheng, Yang Tse

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

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