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A low dimensional composite of hexagonal lithium manganese borate (LiMnBO3), a cathode material for Li-ion batteries

Afyon, Semih and Kundu, Dipan and Darbandi, Azad J. and Hahn, Horst and Krumeich, Frank and Nesper, Reinhard (2014):
A low dimensional composite of hexagonal lithium manganese borate (LiMnBO3), a cathode material for Li-ion batteries.
In: J. Mater. Chem. A, 2 (44), The Royal Society of Chemistry Publishing, pp. 18946-18951, ISSN 2050-7488,
[Online-Edition: http://dx.doi.org/10.1039/c4ta04209c],
[Article]

Abstract

The ultrasonic nebulized spray pyrolysis technique has been applied to synthesize amorphous nanospheres, which are further transformed into nano h-LiMnBO3 with an average crystallite size of [similar]14 nm. A composite electrode of nano h-LiMnBO3 with reduced graphite oxide and amorphous carbon delivers a high first discharge capacity of 140 mA h g−1 at C/15 rate within 4.5–2.0 V and retains a discharge capacity of 110 mA h g−1 at the 25th cycle. The dissolution of Mn into the electrolyte and the instability of the highly delithiated phases during cycling are suggested as the reasons, which limit the cycling stability of h-LiMnBO3. An improved cycling stability at higher capacities is expected via the combination of the particle size reduction, conductive network formation and the metal site doping strategies.

Item Type: Article
Erschienen: 2014
Creators: Afyon, Semih and Kundu, Dipan and Darbandi, Azad J. and Hahn, Horst and Krumeich, Frank and Nesper, Reinhard
Title: A low dimensional composite of hexagonal lithium manganese borate (LiMnBO3), a cathode material for Li-ion batteries
Language: English
Abstract:

The ultrasonic nebulized spray pyrolysis technique has been applied to synthesize amorphous nanospheres, which are further transformed into nano h-LiMnBO3 with an average crystallite size of [similar]14 nm. A composite electrode of nano h-LiMnBO3 with reduced graphite oxide and amorphous carbon delivers a high first discharge capacity of 140 mA h g−1 at C/15 rate within 4.5–2.0 V and retains a discharge capacity of 110 mA h g−1 at the 25th cycle. The dissolution of Mn into the electrolyte and the instability of the highly delithiated phases during cycling are suggested as the reasons, which limit the cycling stability of h-LiMnBO3. An improved cycling stability at higher capacities is expected via the combination of the particle size reduction, conductive network formation and the metal site doping strategies.

Journal or Publication Title: J. Mater. Chem. A
Volume: 2
Number: 44
Publisher: The Royal Society of Chemistry Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 16 Feb 2015 13:31
Official URL: http://dx.doi.org/10.1039/c4ta04209c
Identification Number: doi:10.1039/c4ta04209c
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