Effect of the Anionic Counterpart: Molybdate vs. Tungstate in Energy Storage for Pseudo-Capacitor Applications

Nickel-based bimetallic oxides (BMOs) have shown significant potential in battery-type electrodes for pseudo-capacitors given their ability to facilitate redox reactions. In this work, two bimetallic oxides, NiMoO4 and NiWO4, were synthesized using a wet chemical route. The structure and electrochemical properties of the pseudo-capacitor cathode materials were characterized. NiMoO4 showed superior charge storage performance in comparison to NiWO4, exhibiting a discharge capacitance of 124 and 77 F.g−1, respectively. NiMoO4, moreover, demonstrates better capacity retention after 1000 cycles with 87.14% compared to 82.22% for NiWO4. The lower electrochemical performance of the latter was identified to result from the redox behavior during cycling. NiWO4 reacts in the alkaline solution and forms a passivation layer composed of WO3 on the electrode, while in contrast, the redox behavior of NiMoO4 is fully reversible.

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Exploring the structural and charge storage properties of Ni–ZnS/ZnO composite synthesized by one-pot wet chemical route

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2020.123203 ◽

2020 ◽

Vol 252 ◽

pp. 123203

Author(s):

Gul Rahman ◽

Wareeda Nawab ◽

Wagma Zazai ◽

Salma Bilal ◽

Anwar ul Haq Ali Shah ◽

...

Keyword(s):

Charge Storage ◽

One Pot ◽

Chemical Route ◽

Wet Chemical ◽

Wet Chemical Route ◽

Storage Properties

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A wet-chemical route for macroporous inverse opal Ge anodes for lithium ion batteries with high capacity retention

Sustainable Energy & Fuels ◽

10.1039/c7se00422b ◽

2018 ◽

Vol 2 (1) ◽

pp. 85-90 ◽

Cited By ~ 8

Author(s):

Sebastian Geier ◽

Roland Jung ◽

Kristina Peters ◽

Hubert A. Gasteiger ◽

Dina Fattakhova-Rohlfing ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Electronic Conductivity ◽

Specific Capacity ◽

High Capacity ◽

Lithium Ion ◽

Capacity Retention ◽

Chemical Route ◽

High Specific Capacity ◽

Wet Chemical ◽

Wet Chemical Route

Germanium holds great potential as an anode material for lithium ion batteries due to its high specific capacity and its favorable properties such as good lithium ion diffusivity and electronic conductivity.

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Structures of chemically stabilized ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100150459 ◽

1993 ◽

Vol 51 ◽

pp. 924-925

Author(s):

Pratibha L. Gai ◽

M. A. Saltzberg ◽

L.G. Hanna ◽

S.C. Winchester

Keyword(s):

High Temperature ◽

Calcium Nitrate ◽

Nitrate Hexahydrate ◽

Chemical Route ◽

Cubic Form ◽

Tetragonal Form ◽

Wet Chemical ◽

Wet Chemical Route ◽

Final Composition ◽

Aluminium Nitrate Nonahydrate

Silica based ceramics are some of the most fundamental in crystal chemistry. The cristobalite form of silica has two modifications, α (low temperature, tetragonal form) and β (high temperature, cubic form). This paper describes our structural studies of unusual chemically stabilized cristobalite (CSC) material, a room temperature silica-based ceramic containing small amounts of dopants, prepared by a wet chemical route. It displays many of the structural charatcteristics of the high temperature β-cristobalite (∼270°C), but does not undergo phase inversion to α-cristobalite upon cooling. The Structure of α-cristobalite is well established, but that of β is not yet fully understood.Compositions with varying Ca/Al ratio and substitutions in cristobalite were prepared in the series, CaO:Al2O3:SiO2 : 3-x: x : 40, with x= 0-3. For CSC, a clear sol was prepared from Du Pont colloidal silica, Ludox AS-40®, aluminium nitrate nonahydrate, and calcium nitrate hexahydrate in proportions to form a final composition 1:2:40 composition.

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