Open AccessAmorphous MnO2 Coated 3D Ni Nanomesh as a Thin-film Hybrid Cathode Material under O2 Atmosphere
Author(s) -
Yongho Kee,
Brecht Put,
Fanny Bardé,
Philippe M. Vereecken
Publication year - 2020
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ab6319
Subject(s) - nanomesh , materials science , amorphous solid , cathode , faraday efficiency , electrochemistry , chemical engineering , thin film , substrate (aquarium) , nanotechnology , electrode , graphene , chemistry , oceanography , organic chemistry , geology , engineering
In this study, we apply the economically feasible liquid ALD process to deposit a 2 nm amorphous MnO 2 thin-film on our high surface-area 3D Ni nanomesh substrate, which shows a high surface to footprint area ratio (30 cm 2 :1 cm 2 for 1 μ m thick Ni nanomesh), and demonstrate its preliminary electrochemical activity as a cathode under N 2 and O 2 . The excellent footprint charge density and faradaic efficiency can be attributed to the catalytic oxygen reduction reaction, followed by Li-intercalation thus forming a hybrid combination of Li-ion and Li-O 2 activity, alleviating the detrimental deactivation process of pristine MnO 2 .