Submitted on: 11 August 2005.
Revised on: 05 October 2005.
Accepted on: 31 October 2005.
___________________Energy Storage Materials---ELSEVIER
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Submitted on: 14 February 2010.
Revised on: 06 April 2010.
Accepted on: 07 May 2010.
___________________Energy Storage Materials---ELSEVIER
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