scholarly journals Properties of Lithium Trivanadate Film Electrodes Formed on Garnet-Type Oxide Solid Electrolyte by Aerosol Deposition

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1570 ◽  
Author(s):  
Ryoji Inada ◽  
Kohei Okuno ◽  
Shunsuke Kito ◽  
Tomohiro Tojo ◽  
Yoji Sakurai
Keyword(s):  
Solid Electrolyte ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Electrode Reaction ◽  
Charge Transfer Resistance ◽  
Raw Material ◽  
Metal Foil ◽  
Transfer Resistance ◽  
Strong Adhesion ◽  
Oxide Solid Electrolyte

We fabricated lithium trivanadate LiV3O8 (LVO) film electrodes for the first time on a garnet-type Ta-doped Li7La3Zr2O12 (LLZT) solid electrolyte using the aerosol deposition (AD) method. Ball-milled LVO powder with sizes in the range of 0.5–2 µm was used as a raw material for LVO film fabrication via impact consolidation at room temperature. LVO film (thickness = 5 µm) formed by AD has a dense structure composed of deformed and fractured LVO particles and pores were not observed at the LVO/LLZT interface. For electrochemical characterization of LVO film electrodes, lithium (Li) metal foil was attached on the other end face of a LLZT pellet to comprise a LVO/LLZT/Li all-solid-state cell. From impedance measurements, the charge transfer resistance at the LVO/LLZT interface is estimated to be around 103 Ω cm2 at room temperature, which is much higher than at the Li/LLZT interface. Reversible charge and discharge reactions in the LVO/LLZT/Li cell were demonstrated and the specific capacities were 100 and 290 mAh g−1 at 50 and 100 °C. Good cycling stability of electrode reaction indicates strong adhesion between the LVO film electrode formed via impact consolidation and LLZT.

scholarly journals STUDY OF STRUCTURAL AND ELECTROCHEMICAL PROPERTIES OF 3-D MICROFLOWER-LIKE NICKEL HYDROXIDE

2021 ◽  
pp. 17-18
Author(s):  
D.B. Mane ◽  
L.D. Kadam ◽  
R.V. Dhekale ◽  
G. M. Lohar
Keyword(s):  
Nickel Hydroxide ◽  
Room Temperature ◽  
Deposition Time ◽  
Charge Transfer Resistance ◽  
Hexagonal Crystal ◽  
Galvanostatic Charge ◽  
Transfer Resistance ◽  
Ft Ir ◽  
Eis Analysis ◽  
Energy And Power Density

Recent work reported on nickel hydroxide chemically synthesized by simple cast effective chemical bath deposition method at room temperature. During reaction, nanoflakes developed and time enhance nanoflakes interlinked to form marigold like microflower which reveals from SEM. Structural properties analysis by XRD and FT-IR gives hexagonal crystal structure and presence of Ni-O bond to confirmation of deposition of Ni(OH) material. Highest value of specific 2 -1 capacitance of electrode at deposition time 90 min without aniline from Cyclic voltammetry is 553 Fg at scan rate 10 mV -1 -1 -2 -1 -1 s and from Galvanostatic charge discharge 215 Fg at current density 3 mA cm with 6.04 W h kg and 1687.5 W kg of energy and power density respectively. EIS analysis reveals least charge transfer resistance of 90min deposition time electrode.

Fabrication and Evaluation of Al2O3 Films Using the Aerosol Deposition Method

2011 ◽  
Vol 485 ◽  
pp. 211-214
Author(s):  
Yuta Uemichi ◽  
Koji Nishikawa ◽  
Yuuki Sato ◽  
Shinzo Yoshikado
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Room Temperature ◽  
Single Crystal Silicon ◽  
Aerosol Deposition ◽  
Raw Material ◽  
Deposition Method ◽  
Crystal Silicon ◽  
Sapphire Substrates ◽  
Aerosol Deposition Method

Equipment was designed for the application of Al2O3 thin films by the aerosol deposition method (ADM) at room temperature. Al2O3 film could be deposited on Pyrex-glass, indium tin oxide (ITO), polyvinyl chloride (PVC) plastic, single crystal silicon, and sapphire substrates. The films had the same crystal structure as the raw material particles and were highly transparent. The breakdown electric field of the Al2O3 film for the ADM was more than 35 kV/mm.

Improvement of Ti/RuO2–IrO2 Anode Lifetime and Electrocatalytical Properties by Using an Eco-Friendly Thermal Decomposition Method Using Polyvinyl Alcohol as Solvent

2019 ◽  
Author(s):  
Charlys Bezerra ◽  
Géssica Santos ◽  
Marilia Pupo ◽  
Maria Gomes ◽  
Ronaldo Silva ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Polyvinyl Alcohol ◽  
High Efficiency ◽  
Electrochemical Impedance ◽  
Pechini Method ◽  
Low Cost ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Calcination Temperatures ◽  
Service Lifetime

<p>Electrochemical oxidation processes are promising solutions for wastewater treatment due to their high efficiency, easy control and versatility. Mixed metal oxides (MMO) anodes are particularly attractive due to their low cost and specific catalytic properties. Here, we propose an innovative thermal decomposition methodology using <a>polyvinyl alcohol (PVA)</a> as a solvent to prepare Ti/RuO<sub>2</sub>–IrO<sub>2</sub> anodes. Comparative anodes were prepared by conventional method employing a polymeric precursor solvent (Pechini method). The calcination temperatures studied were 300, 400 and 500 °C. The physical characterisation of all materials was performed by X-ray diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy, while electrochemical characterisation was done by cyclic voltammetry, accelerated service lifetime and electrochemical impedance spectroscopy. Both RuO<sub>2</sub> and IrO<sub>2</sub> have rutile-type structures for all anodes. Rougher and more compact surfaces are formed for the anodes prepared using PVA. Amongst temperatures studied, 300 °C using PVA as solvent is the most suitable one to produce anodes with expressive increase in voltammetric charge (250%) and accelerated service lifetime (4.3 times longer) besides reducing charge-transfer resistance (8 times lower). Moreover, the electrocatalytic activity of the anodes synthesised with PVA toward the Reactive Blue 21 dye removal in chloride medium (100 % in 30 min) is higher than that prepared by Pechini method (60 min). Additionally, the removal total organic carbon point out improved mineralisation potential of PVA anodes. Finally, this study reports a novel methodology using PVA as solvent to synthesise Ti/RuO<sub>2</sub>–IrO<sub>2</sub> anodes with improved properties that can be further extended to synthesise other MMO compositions.</p>

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