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Pore-graded and conductor- and binder-free FeS2 films deposited by spray pyrolysis for high-performance lithium-ion batteries

Published online by Cambridge University Press:  15 July 2019

Shadi Al Khateeb Open the ORCID record for Shadi Al Khateeb [Opens in a new window]  and
Taylor D. Sparks Open the ORCID record for Taylor D. Sparks [Opens in a new window]
Shadi Al Khateeb*
Affiliation:
Department of Materials Engineering, Faculty of Engineering, Al-Balqa Applied University, Al-Salt 19117, Jordan; and Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA
Taylor D. Sparks
Affiliation:
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA
*
a)Address all correspondence to this author. e-mail: [email protected], [email protected]
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Abstract

Porosity-graded, conductor- and binder-free porous FeS2 films through the entire thickness were deposited by spray pyrolysis. The film layers deposited at 15 versus 10 L/min are grown in different modes. The film layer deposited at 15 L/min showed Frank–van der Merwe layer-like growth mode whereas the one deposited at 10 L/min showed island growth mode. These growth modes lead to the formation of large pores on the electrolyte side and small ones on the substrate side of the film deposited using 15 and 10 L/min, sequentially. The porosity-graded films showed discharge capacities at C/10 of 879 mA h/g and 754 mA h/g for the 5th and 20th cycles, respectively. Such capacity values are superior to the literature findings for FeS2 powders and nongraded films mixed with conductor and binder additions.

Keywords

energy storagethin filmporosity
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 14 , 28 July 2019 , pp. 2456 - 2471
Copyright
Copyright © Materials Research Society 2019 

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