scholarly journals High volumetric energy density annealed-MXene-nickel oxide/MXene asymmetric supercapacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 11000-11011 ◽  
Author(s):  
Qi Xun Xia ◽  
Jianjian Fu ◽  
Je Moon Yun ◽  
Rajaram S. Mane ◽  
Kwang Ho Kim
Keyword(s):  
Energy Density ◽  
Nickel Oxide ◽  
Hydrothermal Method ◽  
Cost Effective ◽  
Asymmetric Supercapacitor ◽  
Nio Nanosheets

A Ti3C2TxMXene electrode decorated with NiO nanosheets was synthesized by a facile and cost-effective hydrothermal method.

scholarly journals A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19449-19455 ◽  
Author(s):  
Kien Nguyen ◽  
Nguyen Duc Hoa ◽  
Chu Manh Hung ◽  
Dang Thi Thanh Le ◽  
Nguyen Van Duy ◽  
...  
Keyword(s):  
Comparative Study ◽  
Electrochemical Performance ◽  
Nickel Oxide ◽  
Electrochemical Properties ◽  
Hydrothermal Method ◽  
Oxide Nanowires ◽  
Supercapacitor Application ◽  
Nio Nanosheets

Nanoporous NiO nanosheets and nanowires were synthesized by a hydrothermal method and their electrochemical properties were compared. Results show that the nanoporous NiO nanosheets have a better electrochemical performance and suitable for supercapacitor application.

scholarly journals Hydrothermal assisted in situ growth of CoSe onto graphene nanosheets as a nanohybrid positive electrode for asymmetric supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5853-5862 ◽  
Author(s):  
Balakrishnan Kirubasankar ◽  
Vignesh Murugadoss ◽  
Subramania Angaiah
Keyword(s):  
Energy Density ◽  
Hydrothermal Method ◽  
Graphene Nanosheets ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
In Situ Growth ◽  
Asymmetric Supercapacitors ◽  
One Pot ◽  
Cobalt Selenide

Cobalt selenide–graphene (CoSe–G) nanohybrid was successfully synthesised by a one-pot hydrothermal method and used as a positive electrode for asymmetric supercapacitor, which provides an energy density of 45.5 W h kg−1 and a power density of 1.1 kW kg−1.

scholarly journals Experimental Characterization of Phase Change Materials for Refrigeration Processes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3033
Author(s):  
Anastasia Stamatiou ◽  
Lukas Müller ◽  
Roger Zimmermann ◽  
Jamie Hillis ◽  
David Oliver ◽  
...  
Keyword(s):  
Energy Density ◽  
Phase Change ◽  
Thermophysical Properties ◽  
Phase Change Materials ◽  
Cost Effective ◽  
Latent Heat Storage ◽  
Lower Energy Density ◽  
Change Material ◽  
Storage Units

Latent heat storage units for refrigeration processes are promising as alternatives to water/glycol-based storage due to their significantly higher energy densities, which would lead to more compact and potentially more cost-effective storages. In this study, important thermophysical properties of five phase change material (PCM) candidates are determined in the temperature range between −22 and −35 °C and their compatibility with relevant metals and polymers is investigated. The goal is to complement existing scattered information in literature and to apply a consistent testing methodology to all PCMs, to enable a more reliable comparison between them. More specifically, the enthalpy of fusion, melting point, density, compatibility with aluminum, copper, polyethylene (PE), polypropylene (PP), neoprene and butyl rubber, are experimentally determined for 1-heptanol, n-decane, propionic acid, NaCl/water mixtures, and Al(NO3)3/water mixtures. The results of the investigations reveal individual strengths and weaknesses of the five candidates. Further, 23.3 wt.% NaCl in water stands out for its very high volumetric energy density and n-decane follows with a lower energy density but better compatibility with surrounding materials and supercooling performance. The importance of using consistent methodologies to determine thermophysical properties when the goal is to compare PCM performance is highlighted.

scholarly journals High-Energy Density Asymmetric Supercapacitor Based on Electrospun Vanadium Pentoxide and Polyaniline Nanofibers in Aqueous Electrolyte

2012 ◽  
Vol 159 (9) ◽  
pp. A1481-A1488 ◽  
Author(s):  
Wai Fatt Mak ◽  
Grace Wee ◽  
Vanchiappan Aravindan ◽  
Nutan Gupta ◽  
Subodh G. Mhaisalkar ◽  
...  
Keyword(s):  
Energy Density ◽  
Vanadium Pentoxide ◽  
Aqueous Electrolyte ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Polyaniline Nanofibers

Flexible high-energy asymmetric supercapacitors based on MnO@C composite nanosheet electrodes

2017 ◽  
Vol 5 (2) ◽  
pp. 804-813 ◽  
Author(s):  
Neng Yu ◽  
Kai Guo ◽  
Wei Zhang ◽  
Xianfu Wang ◽  
Ming-Qiang Zhu
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Positive Electrodes

A flexible asymmetric supercapacitor assembled with novel MnO@C composite nanosheets and Co3O4 nanosheets as negative and positive electrodes achieves an exceptional energy density of 59.6 W h kg−1 at a power density of 1529.8 W kg−1.

Nanowire K0.19MnO2 from hydrothermal method as cathode material for aqueous supercapacitors of high energy density

2014 ◽  
Vol 130 ◽  
pp. 693-698 ◽  
Author(s):  
B.H. Zhang ◽  
Y. Liu ◽  
Z. Chang ◽  
Y.Q. Yang ◽  
Z.B. Wen ◽  
...  
Keyword(s):  
Energy Density ◽  
Cathode Material ◽  
Hydrothermal Method ◽  
High Energy ◽  
High Energy Density

Multifunctionality exploration on NiCo2O4–rGO nanocomposites: Photochemical water oxidation, methanol electro-oxidation and asymmetric supercapacitor applications

2021 ◽  
Author(s):  
Vikash Gajraj ◽  
Alesh Kumar ◽  
Ekta Dadarwal ◽  
Rahul Kaushik ◽  
Amilan Jose Devadoss ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Hydrothermal Method ◽  
Water Oxidation ◽  
Asymmetric Supercapacitor ◽  
X Ray Diffraction ◽  
Facile Hydrothermal Method ◽  
X Ray ◽  
Electron Microscopies ◽  
Electro Oxidation ◽  
Supercapacitor Applications

Different weight percentages of NiCo2O4–rGO nanocomposites were prepared via a facile hydrothermal method. The prepared nanocomposites were structurally and morphologically characterized by X-ray diffraction, Raman spectroscopy and electron microscopies. The...

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