Application of Cross-Linked Polyborosiloxanes and Organically Modified Boron Silicate Binders in Silicon-Containing Anodes for Lithium-Ion Batteries

Darius A Shariaty,Susan A Odom,Yang-Tse Cheng,Dali Qian

doi:10.1149/2.0801803jes

Darius A Shariaty, Susan A Odom + Show 2 more

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https://doi.org/10.1149/2.0801803jes

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Abstract

To determine the effect of cross-linking in polymer binders on gravimetric capacity and retention in charge/discharge cycling of lithium-ion batteries containing silicon anodes, polymers with a varied chemiophysical characters have been studied as electrode binders. Here we report the utilization of cross-linked polyborosiloxanes and a boron-modified organosilicate as binders for nanoparticulate silicon-containing anodes for lithium-ion batteries. We show that highly cross-linked binders enable a large degree of capacity to be accessed and that capacity retention is greater when the electrodes are cycled in half cells. More extensive analysis of the boron-modified organosilicate is further explored.

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Follow this and additional works at: https://uknowledge.uky.edu/chemistry_facpub Part of the Chemical Engineering Commons, and the Polymer and Organic Materials Commons
We show that highly cross-linked PBS and boron-modified organosilicate binders allow for a large degree of capacity to be accessed in the anode and that capacity retention is greater when cycled in half cells
A variety of chemical reactions could lead to crosslinking: (1) the condensation of Si-OH groups end-capping the linear polysiloxanes with B-OH groups, forming B-O-Si bridges and releasing water, (2) the condensation of Si-OH groups end-capping the linear polysiloxanes with Si-OEt groups, forming Si-O-Si bridges and releasing ethanol, and (3) the condensation of Si-OH groups end-capping the linear polysiloxanes with Si-OH groups formed by Electrode preparation.—Slurries were composed of a 3:1:1 mass ratio of Si nanoparticles (SiNPs):carbon black:binder, where diglyme was used as the dispersive solvent

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Introduction

Follow this and additional works at: https://uknowledge.uky.edu/chemistry_facpub Part of the Chemical Engineering Commons, and the Polymer and Organic Materials Commons. Darius A.; Qian, Dali; Cheng, Yang-Tse; and Odom, Susan A., "Application of Cross-Linked Polyborosiloxanes and Organically Modified Boron Silicate Binders in Silicon-Containing Anodes for Lithium-Ion Batteries" (2018).

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