Purpose-Built Anisotropic Metal Oxide Material:  3D Highly Oriented Microrod Array of ZnO

2001 ◽  
Vol 105 (17) ◽  
pp. 3350-3352 ◽  
Author(s):  
Lionel Vayssieres ◽  
Karin Keis ◽  
Sten-Eric Lindquist ◽  
Anders Hagfeldt
Keyword(s):  
Metal Oxide ◽  
Oxide Material ◽  
Anisotropic Metal

scholarly journals Thermochemical Energy Storage Performance Analysis of (Fe,Co,Mn)Ox Mixed Metal Oxides

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 362
Author(s):  
Yabibal Getahun Dessie ◽  
Qi Hong ◽  
Bachirou Guene Lougou ◽  
Juqi Zhang ◽  
Boshu Jiang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Redox Reaction ◽  
Gas Flow ◽  
Oxygen Exchange ◽  
Engineering Industry ◽  
Oxide Material ◽  
Oxide Materials ◽  
Uptake Ratio

Metal oxide materials are known for their ability to store thermochemical energy through reversible redox reactions. Metal oxides provide a new category of materials with exceptional performance in terms of thermochemical energy storage, reaction stability and oxygen-exchange and uptake capabilities. However, these characteristics are predicated on the right combination of the metal oxide candidates. In this study, metal oxide materials consisting of pure oxides, like cobalt(II) oxide, manganese(II) oxide, and iron(II, III) oxide (Fe3O4), and mixed oxides, such as (100 wt.% CoO, 100 wt.% Fe3O4, 100 wt.% CoO, 25 wt.% MnO + 75 wt.% CoO, 75 wt.% MnO + 25 wt.% CoO) and 50 wt.% MnO + 50.wt.% CoO), which was subjected to a two-cycle redox reaction, was proposed. The various mixtures of metal oxide catalysts proposed were investigated through the thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), energy dispersive X-ray (EDS), and scanning electron microscopy (SEM) analyses. The effect of argon (Ar) and oxygen (O2) at different gas flow rates (20, 30, and 50 mL/min) and temperature at thermal charging step and thermal discharging step (30–1400 °C) during the redox reaction were investigated. It was revealed that on the overall, 50 wt.% MnO + 50 wt.% CoO oxide had the most stable thermal stability and oxygen exchange to uptake ratio (0.83 and 0.99 at first and second redox reaction cycles, respectively). In addition, 30 mL/min Ar–20 mL/min O2 gas flow rate further increased the proposed (Fe,Co,Mn)Ox mixed oxide catalyst’s cyclic stability and oxygen uptake ratio. SEM revealed that the proposed (Fe,Co,Mn)Ox material had a smooth surface and consisted of polygonal-shaped structures. Thus, the proposed metallic oxide material can effectively be utilized for high-density thermochemical energy storage purposes. This study is of relevance to the power engineering industry and academia.

Experimental and Theoretical Investigation of Minimization of Forming-Induced Variability in Resistive Memory Devices

2015 ◽  
Vol 1729 ◽  
pp. 53-58
Author(s):  
Brian L. Geist ◽  
Dmitri Strukov ◽  
Vladimir Kochergin
Keyword(s):  
Metal Oxide ◽  
Diffusion Processes ◽  
Memory Device ◽  
Device Fabrication ◽  
Oxide Material ◽  
Memory Devices ◽  
Resistive Memory ◽  
Conductive Filament ◽  
Metal Metal ◽  
Metal Oxide Layer

ABSTRACTResistive memory materials and devices (often called memristors) are an area of intense research, with metal/metal oxide/metal resistive elements a prominent example of such devices. Electroforming (the formation of a conductive filament in the metal oxide layer) represents one of the often necessary steps of resistive memory device fabrication that results in large and poorly controlled variability in device performance. In this contribution we present a numerical investigation of the electroforming process. In our model, drift and Ficks and Soret diffusion processes are responsible for movement of vacancies in the oxide material. Simulations predict filament formation and qualitatively agreed with a reduction of the forming voltage in structures with a top electrode. The forming and switching results of the study are compared with numerical simulations and show a possible pathway toward more repeatable and controllable resistive memory devices.

scholarly journals Both Cationic and Anionic Co-(de)intercalation into a Metal-Oxide Material

Joule ◽  
2018 ◽  
Vol 2 (6) ◽  
pp. 1134-1145 ◽  
Author(s):  
Qi Li ◽  
Yu Qiao ◽  
Shaohua Guo ◽  
Kezhu Jiang ◽  
Qinghao Li ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxide Material

scholarly journals Numerical Simulation of Tunneling Current in an Anisotropic Metal-Oxide-Semiconductor Capacitor

2012 ◽  
Vol 10 (3) ◽  
pp. 477 ◽  
Author(s):  
Fatimah A. Noor ◽  
Ferry Iskandar ◽  
Mikrajuddin Abdullah ◽  
Khairurrijal Khairurrijal
Keyword(s):  
Numerical Simulation ◽  
Metal Oxide ◽  
Tunneling Current ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Metal Oxide Semiconductor Capacitor ◽  
Anisotropic Metal

scholarly journals Numerical Simulation of Tunneling Current in an Anisotropic Metal-Oxide-Semiconductor Capacitor

2012 ◽  
Vol 10 (3) ◽  
Author(s):  
Fatimah Arofiati Noor ◽  
Ferry Iskandar ◽  
Mikrajuddin Abdullah ◽  
Khairurrijal Khairurrijal
Keyword(s):  
Numerical Simulation ◽  
Metal Oxide ◽  
Tunneling Current ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Metal Oxide Semiconductor Capacitor ◽  
Anisotropic Metal

A lithium-rich composite metal oxide used as a SALDI-MS matrix for the determination of small biomolecules

2014 ◽  
Vol 50 (97) ◽  
pp. 15397-15399 ◽  
Author(s):  
Ze Li ◽  
Yi-Wei Zhang ◽  
Yue-Long Xin ◽  
Yu Bai ◽  
Heng-Hui Zhou ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Small Molecules ◽  
High Throughput ◽  
Oxide Material ◽  
High Throughput Analysis ◽  
Throughput Analysis ◽  
Small Biomolecules ◽  
Saldi Ms

A lithium-rich composite metal oxide material used as a SALDI matrix for high throughput analysis of small molecules.

Purpose-Built Anisotropic Metal Oxide Nanomaterials

2000 ◽  
Vol 635 ◽  
Author(s):  
Lionel Vayssieres ◽  
Jinghua Guo ◽  
Joseph Nordgren
Keyword(s):  
Aqueous Solution ◽  
Metal Oxide ◽  
Electronic Properties ◽  
Anisotropic Nanoparticles ◽  
Ferric Oxyhydroxide ◽  
Optical And Electronic Properties ◽  
Metal Oxide Nanomaterials ◽  
Self Assembled ◽  
Anisotropic Metal

ABSTRACTLarge arrays of perpendicularly oriented anisotropic nanoparticles of ferric oxyhydroxide (Akaganeite, β-FeOOH) and oxide (Hematite, α-Fe2O3) of typically 3-5 nm in diameter, self-assembled as bundles of about 50 nm in diameter and of up to 1 μm in length have been successfully grown onto polycrystalline substrates without template and/or surfactant by heteronucleation from an aqueous solution of ferric salts and their optical and electronic properties investigated.

Ultrahigh capacitance of NiCo2O4/CeO2mixed metal oxide material for supercapacitor applications

2021 ◽  
pp. 163312
Author(s):  
G Santhosh ◽  
G P Nayaka ◽  
Aarti S. Bhatt
Keyword(s):  
Metal Oxide ◽  
Oxide Material ◽  
Supercapacitor Applications

Facile synthesis of porous MnCo2O4.5 hierarchical architectures for high-rate supercapacitors

CrystEngComm ◽  
2014 ◽  
Vol 16 (12) ◽  
pp. 2335-2339 ◽  
Author(s):  
Wenyao Li ◽  
Kaibing Xu ◽  
Guosheng Song ◽  
Xiying Zhou ◽  
Rujia Zou ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Rate Capability ◽  
High Rate ◽  
Oxide Material ◽  
Facile Synthesis ◽  
Supercapacitor Electrode ◽  
Hierarchical Architectures ◽  
Excellent Cycling Stability ◽  
Mixed Transition

A supercapacitor electrode of porous urchin-like MnCo2O4.5 hierarchical architectures demonstrated an outstanding rate capability and excellent cycling stability, which could be considered as a potential mixed transition metal oxide material for high-rate supercapacitors.

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