A novel strategy for improving performance of lithium-oxygen batteries

Hongyu Dong; Yiwen Wang; Panpan Tang; Hao Wang; Ke Li; Yanhong Yin; Shuting Yang

doi:10.1016/j.jcis.2020.09.096

A novel strategy for improving performance of lithium-oxygen batteries

J Colloid Interface Sci. 2021 Feb 15:584:246-252. doi: 10.1016/j.jcis.2020.09.096. Epub 2020 Oct 6.

Authors

Hongyu Dong¹, Yiwen Wang¹, Panpan Tang¹, Hao Wang¹, Ke Li¹, Yanhong Yin¹, Shuting Yang²

Affiliations

¹ School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang City, Henan Province, 453007, PR China; National & Local Engineering Laboratory for Motive Power and Key Materials, Xinxiang 453000, PR China; Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang 453000, PR China.
² School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang City, Henan Province, 453007, PR China; National & Local Engineering Laboratory for Motive Power and Key Materials, Xinxiang 453000, PR China; Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang 453000, PR China. Electronic address: shutingyang@foxmail.comHongyu.

PMID: 33069023
DOI: 10.1016/j.jcis.2020.09.096

Abstract

Although the theoretical energy density of lithium-oxygen batteries is extremely high, pulverization of lithium metal anode obviously influences batteries cycling performance. In this work, the cathode was coated with a membrane to protect the lithium anode from moisture attacking and avoid the pulverization. The membrane is composed of polyethylene oxide and poly tetra fluoroethylene, which improves the cycle life of the lithium-oxygen batteries cycles to 230 times, with a limited specific capacity of 1000 mAh·g^-1, at a current density of 100 mA·g^-1. Furthermore, the batteries perform stable charge and discharge cycles for 55 times in the air atmosphere, with the relative humidity greater than 50%. It demonstrates this strategy provides a new direction for the development of high-performance lithium-oxygen batteries.

Keywords: Lithium-oxygen batteries; Polymers; Protective coating.