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Cathodic characteristics of amorphous manganese oxides as lithium secondary battery

Cathodic characteristics of amorphous manganese oxides as lithium secondary battery The amorphous manganese dioxides were prepared by reduction method using various reagents. The particle size and morphology depended on reducing agents, some of which were aggregated round particles of sub micron order, and the others were small fine fibers like of a few nm in width and several tens nm in length. The former showed low Li-insertion capacity of around 200 mAhg−1, while the latter material showed high capacity of 500 mAhg−1 in the OCV measurements until 1 V vs. Li. The as-prepared MnO2 contains some amount of water in the structure. The H2O-free MnO2 obtained by heat-treatment under high oxygen pressure was inferior in electrode property to MnO2 containing water in the structure. The H2O content related to the electrode performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Cathodic characteristics of amorphous manganese oxides as lithium secondary battery

Ionics , Volume 8 (2) – Mar 22, 2006

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References (10)

Publisher
Springer Journals
Copyright
Copyright © 2002 by IfI - Institute for Ionics
Subject
Chemistry; Biomedicine general; Analytical Chemistry; Physical Chemistry; Electrochemistry; Optical and Electronic Materials
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/BF02377747
Publisher site
See Article on Publisher Site

Abstract

The amorphous manganese dioxides were prepared by reduction method using various reagents. The particle size and morphology depended on reducing agents, some of which were aggregated round particles of sub micron order, and the others were small fine fibers like of a few nm in width and several tens nm in length. The former showed low Li-insertion capacity of around 200 mAhg−1, while the latter material showed high capacity of 500 mAhg−1 in the OCV measurements until 1 V vs. Li. The as-prepared MnO2 contains some amount of water in the structure. The H2O-free MnO2 obtained by heat-treatment under high oxygen pressure was inferior in electrode property to MnO2 containing water in the structure. The H2O content related to the electrode performance.

Journal

IonicsSpringer Journals

Published: Mar 22, 2006

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