Journal
APPLIED SURFACE SCIENCE
Volume 476, Issue -, Pages 1025-1034Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.01.184
Keywords
FeCo2O4; Supercapacitor; Nanoblades; Pseudocapacitive; Energy storage
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Funding
- SRF award from CSIR, India [09/045/(1365)/2015-EMR-I]
- DST Inspire [IF 160465]
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Two dimensional (2-D) nanoblades can expose numerous active sites, valence states and enable shortened diffusion paths upon layering. Herein, layered nanoblades of iron cobaltite (FeCo2O4) are prepared and aligned in a criss-cross manner to express their electrochemical merits. Sharp edges of the nanoblades contribute through more chemically reactive sites, while, b-value of 0.7 suggests faradaic capacitive (pseudocapacitive) charge storage. Typically 960.0 F g(-1) at 2 A g(-1) with excellent cycling stability (94% for 10,000 cycles) demonstrates brilliant performance in supercapacitor cell. On assembling iron cobaltite (FeCo2O4) nanoblades with graphene nanoribbons (negative electrode) in an asymmetric supercapacitor it pays off with a superb energy density of 34.5 Wh kg(-1) at a power density of 6391.7 W kg(-1) retaining 116.5% for 5000 cycles.
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