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Electrodeposited Manganese Oxide on Carbon Paper for Zinc‐Ion Battery Cathodes
Author(s) -
Dhiman Arjun,
Ivey Douglas G.
Publication year - 2020
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.201900150
Subject(s) - x ray photoelectron spectroscopy , materials science , cathode , raman spectroscopy , electrochemistry , oxide , manganese , intercalation (chemistry) , scanning electron microscope , battery (electricity) , electrode , chemical engineering , carbon fibers , inorganic chemistry , metallurgy , chemistry , composite material , composite number , optics , power (physics) , physics , quantum mechanics , engineering
Nano‐crystalline, flake‐like Mn oxide was electrodeposited onto carbon paper (CP) using a pulsed electrodeposition technique. The electrodeposited Mn oxide was identified as Mn 3 O 4 through a combination of X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), and Raman spectroscopy. The Mn 3 O 4 on CP was used as a cathode for Zn‐ion batteries (ZIBs) and showed excellent cyclability at a current density of 1 A g −1 with a capacity retention of 139 % after 200 cycles. Electron microscopy was used to characterize the microstructural changes of the cathode at various stages during discharge/charge cycling. This work in combination with the electrochemical results suggests a two‐step reaction mechanism involving both intercalation and conversion reactions. The results demonstrate that electrodeposition of the cathode material is a simple, quick, and potentially scalable electrode synthesis method for producing high performing Zn‐ion electrodes without the use of binders or other additives.