Issue 8, 2011
From the journal:

Journal of Materials Chemistry

Influence of carbon towards improved lithium storage properties of Li2MnSiO4 cathodes

V. Aravindan,abc   K. Karthikeyan,b   K. S. Kang,d   W. S. Yoon,e   W. S. Kimf  and  Y. S. Lee*b  

* Corresponding authors

a The Research Institute for Catalysis, Chonnam National University, Gwang-ju, South Korea

b Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju, South Korea
E-mail: leeys@chonnam.ac.kr
Fax: +82 62 530 1909
Tel: +82 62 530 1904

c Energy Research Institute, Nanyang Technological University, Singapore, Singapore
E-mail: aravind_van@yahoo.com

d Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejon, South Korea

e School of Advanced Materials Engineering, Kookmin University, Seoul, South Korea

f Daejung EM Co, Ltd, Incheon, South Korea

Abstract

Superior lithium storage in Li2MnSiO4 cathodes was observed by altering carbon content during the formulation of electrodes. Initially, Li2MnSiO4 was prepared by a conventional solid-state reaction at 900 °C under Ar flow with a fixed amount of adipic acid, which acts as a gelating agent during synthesis. The phase formation was confirmed through powder X-ray diffraction measurements. Scanning electron microscope pictures indicate the particulate morphology of synthesized Li2MnSiO4 particles. Various compositions of electrodes were formulated using the conducting carbon (ketjen black) from 3 to 11 mg along with active material. All the fabricated electrodes were cycled in a Li/Li2MnSiO4 cell configuration to evaluate its lithium storage performance at 0.05 C rate. Among the electrodes, 42% carbon in the composite electrode exhibited a very stable discharge behaviour ∼140 mA h g−1 for 40 cycles at room temperature. Such storage performance was ascribed to the improved electronic conductivity of Li2MnSiO4 electrodes by incorporating carbon. This improvement was supported by electrochemical impedance spectroscopy measurements. Rate performance studies were also conducted and presented in the manuscript.

Graphical abstract: Influence of carbon towards improved lithium storage properties of Li2MnSiO4 cathodes

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Article information

DOI
https://doi.org/10.1039/C0JM03471A
Article type
Communication
Submitted
14 Oct 2010
Accepted
16 Dec 2010
First published
17 Jan 2011

J. Mater. Chem., 2011,21, 2470-2475

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Influence of carbon towards improved lithium storage properties of Li2MnSiO4 cathodes

V. Aravindan, K. Karthikeyan, K. S. Kang, W. S. Yoon, W. S. Kim and Y. S. Lee, J. Mater. Chem., 2011, 21, 2470 DOI: 10.1039/C0JM03471A

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