Layered δ-MnO2 as positive electrode for lithium intercalation

Guodong Du; Jieqiang Wang; Zaiping Guo; Zhixin Chen; Huakun Liu

doi:10.1016/j.matlet.2011.01.073

Layered δ-MnO₂ as positive electrode for lithium intercalation

Guodong Du, Jieqiang Wang, Zaiping Guo, Zhixin Chen, Huakun Liu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

36 Citations (Scopus)

Abstract

Layer structured δ-MnO₂ was synthesized by a microwave-assisted hydrothermal method. The morphology of the product consists of flower-like spheres that range from about 200 nm to 3 μm in diameter and are composed of sheets about 5-10 nm in thickness. When tested in the voltage range of 2 to 4.5 V vs. Li⁺/Li in coin cells, the separator is blocked, handicapping Li⁺ conductivity and leading to cell failure. When tested in the voltage range of 2 to 4 V in ethylene carbonate/dimethyl carbonate (EC/DMC), the δ-MnO₂ delivers an initial reversible capacity of 143.7 mAh g^-1 and can maintain 120 mAh g^-1 at the 60th cycle. The δ-MnO₂ electrode shows good cycling stability at different current densities and delivers a discharge capacity of about 90 mAh g^-1 at 1 C, indicating that it is a promising cathode material for lithium ion batteries. © 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	1319-1322
Journal	Materials Letters
Volume	65
Issue number	9
DOIs	https://doi.org/10.1016/j.matlet.2011.01.073
Publication status	Published - 15 May 2011
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

This work was supported by the Australian Research Council through a Discovery Project ( DP1094261 ) and the Key Subject (Laboratory) Research Foundation of Shandong Province in PR China .

Research Keywords

Cathode
Layer structure
Lithium ion batteries
Manganese dioxide

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Cite this

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abstract = "Layer structured δ-MnO2 was synthesized by a microwave-assisted hydrothermal method. The morphology of the product consists of flower-like spheres that range from about 200 nm to 3 μm in diameter and are composed of sheets about 5-10 nm in thickness. When tested in the voltage range of 2 to 4.5 V vs. Li+/Li in coin cells, the separator is blocked, handicapping Li+ conductivity and leading to cell failure. When tested in the voltage range of 2 to 4 V in ethylene carbonate/dimethyl carbonate (EC/DMC), the δ-MnO2 delivers an initial reversible capacity of 143.7 mAh g-1 and can maintain 120 mAh g-1 at the 60th cycle. The δ-MnO2 electrode shows good cycling stability at different current densities and delivers a discharge capacity of about 90 mAh g-1 at 1 C, indicating that it is a promising cathode material for lithium ion batteries. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

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AU - Du, Guodong

AU - Wang, Jieqiang

AU - Guo, Zaiping

AU - Chen, Zhixin

AU - Liu, Huakun

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

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Y1 - 2011/5/15

N2 - Layer structured δ-MnO2 was synthesized by a microwave-assisted hydrothermal method. The morphology of the product consists of flower-like spheres that range from about 200 nm to 3 μm in diameter and are composed of sheets about 5-10 nm in thickness. When tested in the voltage range of 2 to 4.5 V vs. Li+/Li in coin cells, the separator is blocked, handicapping Li+ conductivity and leading to cell failure. When tested in the voltage range of 2 to 4 V in ethylene carbonate/dimethyl carbonate (EC/DMC), the δ-MnO2 delivers an initial reversible capacity of 143.7 mAh g-1 and can maintain 120 mAh g-1 at the 60th cycle. The δ-MnO2 electrode shows good cycling stability at different current densities and delivers a discharge capacity of about 90 mAh g-1 at 1 C, indicating that it is a promising cathode material for lithium ion batteries. © 2011 Elsevier B.V. All rights reserved.

AB - Layer structured δ-MnO2 was synthesized by a microwave-assisted hydrothermal method. The morphology of the product consists of flower-like spheres that range from about 200 nm to 3 μm in diameter and are composed of sheets about 5-10 nm in thickness. When tested in the voltage range of 2 to 4.5 V vs. Li+/Li in coin cells, the separator is blocked, handicapping Li+ conductivity and leading to cell failure. When tested in the voltage range of 2 to 4 V in ethylene carbonate/dimethyl carbonate (EC/DMC), the δ-MnO2 delivers an initial reversible capacity of 143.7 mAh g-1 and can maintain 120 mAh g-1 at the 60th cycle. The δ-MnO2 electrode shows good cycling stability at different current densities and delivers a discharge capacity of about 90 mAh g-1 at 1 C, indicating that it is a promising cathode material for lithium ion batteries. © 2011 Elsevier B.V. All rights reserved.

KW - Cathode

KW - Layer structure

KW - Lithium ion batteries

KW - Manganese dioxide

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