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Rapid oxygen diffusive lithium-oxygen batteries using a restacking-inhibited, free-standing graphene cathode film
Authors
Daeun Yu
Dongjin Yun
+11 more
Dongmin Im
Doyoung Kim
Hyangsook Lee
Hyoyoung Lee
Hyuk Jae Kwon
Hyunju An
In-Sun Jung
Jaeduck Jang
Jung-Hwa Kim
Mokwon Kim
Sunjung Byun
Publication date
1 May 2019
Publisher
ROYAL SOC CHEMISTRY
Abstract
© The Royal Society of Chemistry. A graphene-based porous electrode for a lithium-oxygen (Li-O 2 ) battery is investigated for use in next generation energy storage systems. The porosity of the cathode electrode in Li-O 2 batteries is a key factor in increasing their oxygen diffusion rate and electrochemical activity, and enables a longer cycle life. In addition, the adsorption behavior of the electrolyte is an important factor for the charging process and diffusion of oxygen. We report the fabrication of a restacking-inhibited film cathode using corrugated and highly porous reduced graphene flakes that have an outstanding capacity and cycle life. We have demonstrated a robust porous cathode film for the next generation Li-O 2 batteries, which provides (1) rich voids and spaces for oxygen-related reactions, (2) easy accessibility to the electrolyte and rapid oxygen diffusion. This study can be applied for the design of new solution-processed graphene and the development of Li-O 2 battery cathode
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Last time updated on 06/02/2020