Nitrogen-containing carbons prepared from polyaniline as anode materials for lithium secondary batteries

Nitrogen-containing carbons have been prepared from polyaniline by carbonization and activation. Lithium storage performances of the carbons have been studied by galvanostatic charge/discharge. The carbon without activation shows a first discharge capacity of 729 mAh g − 1 , after activation, the ca...

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Bibliographic Details
Published in:Materials letters 2010-10, Vol.64 (19), p.2115-2117
Main Authors: Li, Limin, Liu, Enhui, Yang, Yanjing, Shen, Haijie, Huang, Zhengzheng, Xiang, Xiaoxia
Format: Article
Language:English
Subjects:
Activation
Anode material
Anodes
Carbon
Carbonization
Charge
Discharge
Electrical properties
Lithium
Lithium secondary batteries
Nitrogen-containing carbon
Polyanilines
Porosity
Storage batteries
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Summary:Nitrogen-containing carbons have been prepared from polyaniline by carbonization and activation. Lithium storage performances of the carbons have been studied by galvanostatic charge/discharge. The carbon without activation shows a first discharge capacity of 729 mAh g − 1 , after activation, the capacity improved. The first discharge capacity of the carbon prepared by H 3PO 4 activation is 1083 mAh g − 1 , and that of the carbon prepared by KOH activation is as high as 2201 mAh g − 1 , whose reversible capacity is 1027 mAh g − 1 . To the carbon prepared by KOH activation, the first coulombic efficiency is just 47%, however, from the second cycle, the coulombic efficiency goes up rapidly to above 90%, the reversible capacity is still as high as 747 mAh g − 1 after 20 cycles. It may be a promising candidate as an anode material for lithium secondary batteries.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2010.06.057