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Polymer Binders for High-Performance Lithium-Ion Batteries
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AI
DOI：10.1039/D5PY01176K.png)
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Abstract
En 中文
Polymer binders play a critical role in lithium-ion battery electrodes by providing mechanical cohesion among active materials; conductive additives and current collectors. They help to preserve the structural integrity of the composite and sustain continuous electron/ion migration pathway throughout repeated lithiation-delithiation cycling. Despite their essential role; polymer binders have historically been understudied; and only limited commercial ones; such as polyvinylidene fluoride (PVDF); carboxyl methylcellulose (CMC)/styrene-butadiene rubber (SBR) and polyacrylic acid (PAA); have been adopted. These widely used commercial binders have intrinsic drawbacks including insufficient adhesion; mechanical brittleness; swelling propensity and using toxic solvents; making them inadequate for high-energy-density batteries. This review categorizes binder design strategies according to the specific requirement of various cathode materials and anode materials; with a particular emphasis on those employed in commercial electrodes as well as those reported in academic research. Finally; perspectives on future binders for high-energy-density batteries with extended cycling life and sustainability are presented.
Keywords:
Polymer binders
Lithium-ion batteries
Electrode materials
Adhesion
Sustainability