In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 30 ( 2023), p. 16003-16008
Abstract:
The use of a redox mediator (RM) to chemically decompose Li 2 O 2 is an efficient approach to improve the efficiency and cyclability of lithium–oxygen batteries. It has been suggested that RMs can react with the singlet oxygen ( 1 O 2 ) but no attempt has been made to categorize the reactivity of different RMs with 1 O 2 , or investigate the impact of this reaction on the electrochemical behavior of RMs. Here we show that the reactivity of RMs with 1 O 2 depends on the unique chemistry of the RM, and that the Li 2 O 2 decomposition kinetics of RMs are considerably affected by their reactivity towards 1 O 2 . We examine changes to the chemical and electrochemical properties of RMs after exposure to 1 O 2 . These results suggest that the activity and lifetime of RMs in Li–O 2 cells are affected by their reactivity towards 1 O 2 , and that RMs can be classified depending on how easily they react with, or physically quench 1 O 2 .
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
Permalink