Mass and charge transport relevant to the formation of toroidal lithium peroxide nanoparticles in an aprotic lithium-oxygen battery： An experimental and theoretical modeling study

The discharge and charge mechanisms of rechargeable Li-O2 batteries have been the subject of extensive investigation recently. However, they are not fully understood yet. Here we report a systematic study of the morphological transition of Li2O2 from a single crystalline structure to a toroid like p...

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Published inNano research Vol. 10; no. 12; pp. 4327 - 4336
Main Authors Luo, Xiangyi, Amine, Rachid, Lau, Kah Chun, Lu, Jun, Zhan, Chun, Curtiss, Larry A., Al Hallaj, Said, Chaplin, Brian P., Amine, Khalil
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 01.12.2017
Springer
Subjects
Atomic/Molecular Structure and Spectra
Biological evolution
Biomedicine
Biotechnology
Charge transport
Chemistry and Materials Science
Condensed Matter Physics
Discharge
electrocatalyst
ENERGY STORAGE
Evolution
Film growth
Interfaces
Lithium
Lithium batteries
lithium peroxide
Mass transport
Materials Science
Metal air batteries
nanocomposite
Nanoparticles
Nanotechnology
Oxygen
Oxygen reduction reactions
Peroxide
Rechargeable batteries
rechargeable Li-O2 battery
Research Article
Species diffusion
rechargeable Li-O
electrocatalyst
nanocomposite
lithium peroxide
battery
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Summary:The discharge and charge mechanisms of rechargeable Li-O2 batteries have been the subject of extensive investigation recently. However, they are not fully understood yet. Here we report a systematic study of the morphological transition of Li2O2 from a single crystalline structure to a toroid like particle during the discharge-charge cycle, with the help of a theoretical model to explain the evolution of the Li2O2 at different stages of this process. The model suggests that the transition starts in the first monolayer of Li2O2, and is subsequently followed by a transition from particle growth to film growth if the applied current exceeds the exchange current for the oxygen reduction reaction in a Li-O2 cell. Furthermore, a sustainable mass transport of the diffusive active species （e.g., O2 and Li＋） and evolution of the underlying interfaces are critical to dictate desirable oxygen reduction （discharge） and evolution （charge） reactions in the oorous carbon electrode of a Li-O2 cell.
Bibliography:11-5974/O4
rechargeable Li-O2 battery,electrocatalyst,nanocomposite,lithium peroxide
The discharge and charge mechanisms of rechargeable Li-O2 batteries have been the subject of extensive investigation recently. However, they are not fully understood yet. Here we report a systematic study of the morphological transition of Li2O2 from a single crystalline structure to a toroid like particle during the discharge-charge cycle, with the help of a theoretical model to explain the evolution of the Li2O2 at different stages of this process. The model suggests that the transition starts in the first monolayer of Li2O2, and is subsequently followed by a transition from particle growth to film growth if the applied current exceeds the exchange current for the oxygen reduction reaction in a Li-O2 cell. Furthermore, a sustainable mass transport of the diffusive active species （e.g., O2 and Li＋） and evolution of the underlying interfaces are critical to dictate desirable oxygen reduction （discharge） and evolution （charge） reactions in the oorous carbon electrode of a Li-O2 cell.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
AC02-06CH11357
USDOE Office of Science (SC), Basic Energy Sciences (BES)
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-017-1529-z