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Effect of PEDOT:PSS Coating on Manganese Oxide Nanowires for Lithium Ion Battery Anodes

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Title
Effect of PEDOT:PSS Coating on Manganese Oxide Nanowires for Lithium Ion Battery Anodes
Author(s)
In-Hwan Ko; Kim, S.-J.; Lim, J.; Seung-Ho Yu; Ahn, J.; Lee, J.-K.; Yung-Eun Sung
Publication Date
2016-01
Journal
ELECTROCHIMICA ACTA, v.187, no., pp.340 - 347
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Transition metal oxides have been considered as promising lithium storage materials that undergo a conversion reaction, exhibiting high specific capacity. However, capacity fading during cycling is the most serious obstacle for their commercialization. In order to overcome this, we have added PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) to Mn2O3 nanowires. PEDOT:PSS was successfully coated onto Mn2O3 nanowires while maintaining the structure of Mn2O3. The coating of PEDOT:PSS reduced the resistance of the surface and protected the surface electron channels from the pulverization effect of the charge-discharge operation. α-Mn2O3/PEDOT:PSS showed excellent cyclability with a reversible capacity of 1450 mAh g-1 after 200 cycles at a current density of 100 mA g-1. An increase in capacity was observed with continuous cycling, which may be attributed to further oxidation of the manganese species and a reversible reaction of the gel-like polymer on the manganese surface. The results demonstrate that PEDOT:PSS enhances the electrochemical activity by providing electron channels and prevents pulverization caused by the charge and discharge process. © 2015 Elsevier Ltd
URI
https://pr.ibs.re.kr/handle/8788114/2200
ISSN
0013-4686
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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