Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries

So, Yujin; Bae, Hyeon-Su; Kang, Yi Young; Chung, Ji Yun; Park, No Kyun; Kim, Jinsoo; Jung, Hee-Tae; Won, Jong Chan; Ryou, Myung-Hyun; Kim, Yun Ho

doi:10.3390/nano11123164

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Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries

^1,2,†,

^3,†,

¹,

^1,4,

¹,

¹,

^1,4,*

^3,*

and

Yun Ho Kim

^1,4,*

Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea

Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea

Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Korea

⁴

Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, Daejeon 34113, Korea

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Academic Editor: Pedro Gómez-Romero

Nanomaterials 2021, 11(12), 3164; https://doi.org/10.3390/nano11123164

Received: 19 October 2021 / Revised: 17 November 2021 / Accepted: 19 November 2021 / Published: 23 November 2021

(This article belongs to the Special Issue Emerging Nanomaterials for Lithium-Sulfur Batteries and Beyond II)

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Abstract

Silicon is an attractive anode material for lithium-ion batteries (LIBs) because of its natural abundance and excellent theoretical energy density. However, Si-based electrodes are difficult to commercialize because of their significant volume changes during lithiation that can result in mechanical damage. To overcome this limitation, we synthesized an eco-friendly water-soluble polyimide (W-PI) precursor, poly(amic acid) salt (W-PAmAS), as a binder for Si anodes via a simple one-step process using water as a solvent. Using the W-PAmAS binder, a composite Si electrode was achieved by low-temperature processing at 150 °C. The adhesion between the electrode components was further enhanced by introducing 3,5-diaminobenzoic acid, which contains free carboxylic acid (–COOH) groups in the W-PAmAS backbone. The –COOH of the W-PI binder chemically interacts with the surface of Si nanoparticles (SiNPs) by forming ester bonds, which efficiently bond the SiNPs, even during severe volume changes. The Si anode with W-PI binder showed improved electrochemical performance with a high capacity of 2061 mAh g⁻¹ and excellent cyclability of 1883 mAh g⁻¹ after 200 cycles at 1200 mA g⁻¹. Therefore, W-PI can be used as a highly effective polymeric binder in Si-based high-capacity LIBs. View Full-Text

Keywords: lithium-ion batteries; silicon anodes; binder; polyimide; water-processable

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So, Y.; Bae, H.-S.; Kang, Y.Y.; Chung, J.Y.; Park, N.K.; Kim, J.; Jung, H.-T.; Won, J.C.; Ryou, M.-H.; Kim, Y.H. Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries. Nanomaterials 2021, 11, 3164. https://doi.org/10.3390/nano11123164

AMA Style

So Y, Bae H-S, Kang YY, Chung JY, Park NK, Kim J, Jung H-T, Won JC, Ryou M-H, Kim YH. Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries. Nanomaterials. 2021; 11(12):3164. https://doi.org/10.3390/nano11123164

Chicago/Turabian Style

So, Yujin, Hyeon-Su Bae, Yi Y. Kang, Ji Y. Chung, No K. Park, Jinsoo Kim, Hee-Tae Jung, Jong C. Won, Myung-Hyun Ryou, and Yun H. Kim. 2021. "Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries" Nanomaterials 11, no. 12: 3164. https://doi.org/10.3390/nano11123164

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Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries

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