A Caltech Library Service

Incorporating graphene halides to improve Li/S batteries

Pardo, Eduardo and Thai, Edward and Dunham, Nathanael and Alonso, Josue and Garcia, Jonathan and Dinh, Andrew and Yu, Ted (2017) Incorporating graphene halides to improve Li/S batteries. In: 254th American Chemical Society National Meeting & Exposition, August 20-24, 2017, Washington, DC.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Lithium-sulfur batteriesare a potential game-changer in rechargeable lithium battery technol. In addn. to being very low cost due to the abundance of sulfur, it also has a higher theor. specific capacity (1674 mAh/g-sulfur) than traditional lithium-ion batteries. In the last five years, incorporating graphene oxide (GO) has been an effective strategy to prolong the life of lithium-sulfur batteries, which improves overall performance and battery stability. However, current methods of GO synthesis, such as the Hummers method, are not costeffective. New research explores the use of graphene halidesto replace GO. The graphene halides used in this study can be produced through a simple ball-mill process which is easily scalable. Our studies show that out of the halides, graphene-iodide (GI) has performed best when compared to graphene bromide and graphene chloride. We attempted to increase the cycle life and performance of our cathodes by using a technique to reintroduce oxygen functional groups on the GI basal planes. Through NO adsorption followed by UV treatment, we have been able to create carbon-oxygen functional groups to synthesize epoxidic, hydroxyl, and carbonyl carbon-oxygen bonds on graphene halides. This alternative method to oxidn. uses fewer resources than the traditional Hummers method, which will reduce cost and environmental impact. The oxidized GI outperformed the non-oxidized GI based cathodes in its ability to maintain discharge capacity over time.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Website
Yu, Ted0000-0003-3202-0981
Additional Information:© 2017 American Chemical Society.
Record Number:CaltechAUTHORS:20170911-145051102
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81316
Deposited By: Tony Diaz
Deposited On:11 Sep 2017 21:59
Last Modified:03 Oct 2019 18:41

Repository Staff Only: item control page