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Effect of intercalated alkali ions in layered manganese oxide nanosheets as neutral electrochemical capacitors

Author:
Ma, Nattapol, Kosasang, Soracha, Krittayavathananon, Atiweena, Phattharasupakun, Nutthaphon, Sethuraman, Sathyamoorthi, Sawangphruk, Montree
Source:
Chemical communications 2019 v.55 no.9 pp. 1213-1216
ISSN:
1364-548X
Subject:
cations, electrical equipment, electrochemistry, electron transfer, lithium, manganese, manganese oxides, nanosheets, potassium, sodium, sodium sulfate
Abstract:
New insight into the influence of Li⁺, Na⁺, and K⁺ cations between adjacent layers of birnessite-type manganese oxides (MnOₓ) towards the intercalation/deintercalation charge storage mechanism as a neutral electrochemical capacitor (1 M Na₂SO₄) is demonstrated. These structural cations play a major role in both the kinetic electron transfer in a faradaic redox reaction and the accessibility of the compensating electrolyte ions. Li-MnOₓ shows the highest Mn utilization of 51% followed by Na-MnOₓ (40%) and K-MnOₓ (31%), respectively.
Agid:
6269147