Kinetics of lithium peroxide oxidation by redox mediators and consequences for the lithium-oxygen cell

Nature Communications
Yuhui ChenPeter G Bruce

Abstract

Lithium-oxygen cells, in which lithium peroxide forms in solution rather than on the electrode surface, can sustain relatively high cycling rates but require redox mediators to charge. The mediators are oxidised at the electrode surface and then oxidise lithium peroxide stored in the cathode. The kinetics of lithium peroxide oxidation has received almost no attention and yet is crucial for the operation of the lithium-oxygen cell. It is essential that the molecules oxidise lithium peroxide sufficiently rapidly to sustain fast charging. Here, we investigate the kinetics of lithium peroxide oxidation by several different classes of redox mediators. We show that the reaction is not a simple outer-sphere electron transfer and that the steric structure of the mediator molecule plays an important role. The fastest mediator studied could sustain a charging current of up to 1.9 A cm-2, based on a model for a porous electrode described here.

References

May 8, 2013·Advanced Materials·Oliver GerbigJoachim Maier
May 23, 2013·Nature Chemistry·Yuhui ChenPeter G Bruce
Apr 15, 2014·Chemical Reviews·Jun LuKhalil Amine
May 16, 2014·Journal of the American Chemical Society·Dan SunJohn B Goodenough
Sep 26, 2014·Journal of the American Chemical Society·Benjamin J BergnerJürgen Janek
Nov 8, 2014·Chemical Reviews·Alan C Luntz, Bryan D McCloskey
May 12, 2015·Chemical Communications : Chem Comm·Yun Guang ZhuQing Wang
Jul 15, 2015·Proceedings of the National Academy of Sciences of the United States of America·Colin M BurkeBryan D McCloskey
Aug 12, 2015·The Journal of Physical Chemistry Letters·K M Abraham
Mar 6, 2014·The Journal of Physical Chemistry Letters·Stefano MeiniDoron Aurbach
Apr 19, 2012·The Journal of Physical Chemistry Letters·B D McCloskeyA C Luntz
Nov 14, 2015·Physical Chemistry Chemical Physics : PCCP·Benjamin J BergnerJürgen Janek
May 20, 2016·The Journal of Physical Chemistry Letters·Thomas A Galloway, Laurence J Hardwick
May 27, 2016·Journal of the American Chemical Society·Zhuojian Liang, Yi-Chun Lu

❮ Previous
Next ❯

Citations

Aug 9, 2018·Physical Chemistry Chemical Physics : PCCP·P P BawolH Baltruschat
Aug 11, 2018·Chemical Communications : Chem Comm·Tom HomewoodNuria Garcia-Araez
Nov 18, 2018·ChemSusChem·Xiaoxiao ShenYuhui Chen
Oct 1, 2020·Chemical Society Reviews·Andebet Gedamu TamiratYongyao Xia
Mar 28, 2019·Nature Communications·Won-Jin KwakYang-Kook Sun
Dec 9, 2020·Nanotechnology·Xinhang CuiWei Chen
Sep 16, 2020·ACS Applied Materials & Interfaces·Elena BadettiGiulia Licini
Mar 17, 2021·Nature Chemistry·Yann K PetitStefan A Freunberger
May 25, 2021·Chemical Society Reviews·Jamie M CameronLee R Johnson
Aug 13, 2021·ACS Applied Materials & Interfaces·Deqing CaoYuhui Chen
Nov 14, 2018·The Journal of Physical Chemistry Letters·Shichao WuHaoshen Zhou
Feb 25, 2020·Chemical Reviews·Tao LiuClare P Grey
Mar 7, 2020·Chemical Reviews·Won-Jin KwakDoron Aurbach
Feb 6, 2020·Chemical Reviews·Matthew LiJun Lu
Nov 15, 2018·Analytical Chemistry·Jingshu HuiJoaquín Rodríguez-López
Apr 11, 2019·Journal of the American Chemical Society·Zhen-Zhen ShenLi-Jun Wan
Nov 19, 2021·Accounts of Chemical Research·Giyun KwonKisuk Kang
Dec 22, 2021·ACS Applied Materials & Interfaces·Chihyun HwangHyun-Kon Song

❮ Previous
Next ❯

Methods Mentioned

BETA
NMR

Software Mentioned

LiSICON

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.