期刊
JOURNAL OF MATERIALS RESEARCH
卷 34, 期 14, 页码 2456-2471出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2019.208
关键词
energy storage; thin film; porosity
资金
- USTAR UTAG program-Kuwait
- Arab Fund Fellowship Program-Kuwait
- USTAR UTAG program
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.
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