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EN06.04.22 : The Effects of Electrode Density on Sulfur and Silicon Performance for Lithium-Ion Batteries

5:00 PM–7:00 PM Apr 3, 2018

PCC North, 300 Level, Exhibit Hall C-E

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Jeffrey Bell1 Rachel Ye1 Daisy Patino1 Leon Peng1 Andrew Scott1 Cengiz Ozkan1 Mihri Ozkan1

1, University of California, Riverside, Riverside, California, United States

Electrochemical storage has gained momentum amid increasing concerns for a cleaner, more environmentally friendly future. Currently, lithium ion battery systems do not meet the requirements to quell the increasing concerns and it is therefore imperative to move in a new direction. Top contenders for ‘beyond lithium’ is lithium-sulfur (Li-S) and silicon (Si). In order to scale up these new materials, it is crucial to study the effects of densification on their performance. Densification may alter the robustness of the electrode’s conductive network and ability of the electrolyte to penetrate the electrode. Through altering the electrode's density, it possible to improve network conductivity while also maintaining electrolyte penetration. Silicon and Sulfur electrodes were set to different densities and then characterized using gravimetric cycling, galvanostatic intermittent titration technique, cyclic voltammetry, and material utilization.Herein we report the fabrication of simple sulfur and silicon electrodes at different densities and their long term positive effects on cycling, rate performance and capacity.

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