12 0

Clarification of Solvent Effects on Discharge Products in Li-O-2 Batteries through a Titration Method

Title
Clarification of Solvent Effects on Discharge Products in Li-O-2 Batteries through a Titration Method
Author
이윤정
Keywords
dimethyl sulfoxide (DMSO); tetraethylene glycol dimethyl ether (TEGDME); UV-vis titration; Li2O2; LiOH
Issue Date
2018-01
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v. 10, no. 1, page. 526-533
Abstract
As a substitute for the current lithium-ion batteries, rechargeable lithium oxygen batteries have attracted much attention because of their theoretically high energy density, but many challenges continue to exist. For the development of these batteries, understanding and controlling the main discharge product Li2O2 (lithium peroxide) are of paramount importance. Here, we comparatively analyzed the amount of Li2O2 in the cathodes discharged at various discharge capacities and current densities in dimethyl sulfoxide (DMSO) and tetraethylene glycol dimethyl ether (TEGDME) solvents. The precise assessment entailed revisiting and revising the UVvis titration analysis. The amount of Li2O2 electrochemically formed in DMSO was less than that formed in TEGDME at the same capacity and even at a much higher full discharge capacity in DMSO than in TEGDME. On the basis of our analytical experimental results, this unexpected result was ascribed to the presence of soluble LiO2-like intermediates that remained in the DMSO solvent and the chemical transformation of Li2O2 to LiOH, both of which originated from the inherent properties of the DMSO solvent.
URI
https://pubs.acs.org/doi/10.1021/acsami.7b14279http://repository.hanyang.ac.kr/handle/20.500.11754/117085
ISSN
1944-8244; 1944-8252
DOI
10.1021/acsami.7b14279
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE