Synthesis of Fe3O4@SnO2 core–shell nanorod film and its application as a thin-film supercapacitor electrode

Abstract

Considerable areal capacitance (mF cm(-2) level) and long cycling stability (2000 cycles, the best ever for Fe(3)O(4)-based electrodes) are demonstrated for the first time for Fe(3)O(4)@SnO(2) core-shell nanorod film, which is grown directly on a current collector substrate.

Co3O4 nanowires@MnO2 nanolayer or nanoflakes core–shell arrays for high-performance supercapacitors: The influence of morphology on performance

“…After 1000 cycles, the capacitance retention of the Co 3 O 4 @MnO 2 nanolayer and nanoflakes NWAs are 80.3% and 74.2% respectively. The cycling lives are comparable to other metal oxide/metal oxide core-shell electrode materials [19,63]. The inset shows the charge-discharge curves of the last 5 cycles.…”

Capacitance behavior of ordered mesoporous carbon/Fe2O3 composites: Comparison between 1D cylindrical, 2D hexagonal, and 3D bicontinuous mesostructures

“…Qualitatively, all plots are similar in shape, beginning with a semi-circle or arc at high frequencies, followed by a straight line inclined at an angle of around 45°to the real axis in the medium frequency region, and a nearly vertical line in the low frequency region. Previous work suggested that such a pattern of the EIS can be fit by an equivalent Randles circuit [26,28,[36][37][38][39][40][41][42][43][44][45], as shown in the inset of Fig. 3a.…”

Core–Shell Carbon‐Coated CuO Nanocomposites: A Highly Stable Electrode Material for Supercapacitors and Lithium‐Ion Batteries

“…Recently, Poizot et al [5] demonstrated that metal oxides that served as electrode materials exhibited significant electrochemical performance in terms of electrochemical capacities and capacity retention. Because of their unique properties such as high theoretical capacity, low cost, chemical stability, and natural abundance, various metal oxide electrode materials have emerged as promising candidates in the future generation of LIBs and SCs, such as SnO 2 , [6,7] Co 3 O 4 , [8,9] Mn 3 O 4 , [10,11] Fe 3 O 4 , [12,13] and CuO. [14,15] Among metal oxides, CuO with its high theoretical capacity of 670 mA h g À1 is therefore one of the most promising potential anodes to replace conventional graphite anode materials (372 mA h g…”