Communication—Functional Conductive Polymer Binder for Practical Si-Based Electrodes

Tianyu Zhu,Gao Liu

doi:10.1149/1945-7111/abff01

Tianyu Zhu, Gao Liu

Open Access

https://doi.org/10.1149/1945-7111/abff01

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Abstract

Multifunctional conductive binders represent an emerging class of polymer materials to address inherent challenges of Si electrodes for high capacity lithium-ion batteries. Advanced binders with oriented functionalities are greatly desired to facilitate the battery chemistry. We here report stable capacity cycling of a practical composite anode comprising industrial available SiOx (>60 wt%), carbon materials and a conductive polymer binder—poly(9,9-dioctylfluorene-co-fluorenonecomethylbenzoic ester) (PFM). This multifunctional polymer functions as both an interface modifier and an electrode binder for high-performing SiOx composite electrodes. The viability of multifunctional conductive polymer binders was further validated in a practical full cell.

Highlights

OPEN ACCESSCommunication—Functional Conductive Polymer Binder for Practical SiBased Electrodes. To cite this article: Tianyu Zhu and Gao Liu 2021 J
Polymer binders play a critical role in functional composite electrodes, they are mostly inactive towards electrochemical processes.[31,32,33]
We present a conductive polymer binder to function as both surface modifier and binder for advanced Si-based electrodes

Summary

OPEN ACCESS

Communication—Functional Conductive Polymer Binder for Practical SiBased Electrodes. To cite this article: Tianyu Zhu and Gao Liu 2021 J. Communication—Functional Conductive Polymer Binder for Practical Si-Based Electrodes. We report a composite electrode comprising high ratio of industry available SiOx particles, graphite particles, acetylene black and a conductive polymer binder. This class of conductive polymer binder based SiOx electrodes shows high reversible capacity and high Coulombic efficiency as. SiOx active material and graphite and Denka black were sequentially added and thoroughly ground for 30 min under room temperature. Characterization.—The surface images of composite electrodes (or binder films) on the copper foil were collected with Scanning electron microscopy (SEM, JSM-7500F JOEL Ltd., Tokyo, Japan) with an accelerating voltage of 12 kV under high vacuum at room temperature

Results and Discussion

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Summary