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Review
. 2023 Nov 21;15(23):4477.
doi: 10.3390/polym15234477.

Advances in Polymer Binder Materials for Lithium-Ion Battery Electrodes and Separators

Siyeon Lee  1 , Heejin Koo  1 , Hong Suk Kang  2 , Keun-Hwan Oh  3 , Kwan Woo Nam  1
Affiliations
Review

Advances in Polymer Binder Materials for Lithium-Ion Battery Electrodes and Separators

Siyeon Lee et al. Polymers (Basel). .

Abstract

Lithium-ion batteries (LIBs) have become indispensable energy-storage devices for various applications, ranging from portable electronics to electric vehicles and renewable energy systems. The performance and reliability of LIBs depend on several key components, including the electrodes, separators, and electrolytes. Among these, the choice of binder materials for the electrodes plays a critical role in determining the overall performance and durability of LIBs. This review introduces polymer binders that have been traditionally used in the cathode, anode, and separator materials of LIBs. Furthermore, it explores the problems identified in traditional polymer binders and examines the research trends in next-generation polymer binder materials for lithium-ion batteries as alternatives. To date, the widespread use of N-methyl-2-pyrrolidone (NMP) as a solvent in lithium battery electrode production has been a standard practice. However, recent concerns regarding its high toxicity have prompted increased environmental scrutiny and the imposition of strict chemical regulations. As a result, there is a growing urgency to explore alternatives that are both environmentally benign and safer for use in battery manufacturing. This pressing need is further underscored by the rising demand for diverse binder research within the lithium battery industry. In light of the current emphasis on sustainability and environmental responsibility, it is imperative to investigate a range of binder options that can align with the evolving landscape of green and eco-conscious battery production. In this review paper, we introduce various binder options that can align with the evolving landscape of environmentally friendly and sustainable battery production, considering the current emphasis on battery performance enhancement and environmental responsibility.

Keywords: conventional binders; lithium-ion battery binder; next-generation binders; polymer.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic representation of conventional polymer binders for LIB anodes.
Figure 2
Figure 2
Schematic representations of lithiation/delithiation of Si particles using (a) conventional binder and (b) the SHPET binder.
Figure 3
Figure 3
Schematic of cathode structure.
Figure 4
Figure 4
Limitations of current binders and improvements in next-generation cathode binders.
Figure 5
Figure 5
Schematic of the ceramic-coated separator structure.
Figure 6
Figure 6
Schematic of next-generation polymer binders for separator.
See this image and copyright information in PMC

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