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Electrochemical Characterization of Al^{3+} Doped Spinel Cathode Active Nanoparticles for Li-Ion Batteries

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Bulut E., Can M., Özacar M., Akbulut H.

Acta Physica Polonica A

2016

vol. 129

issue 4

631-634

Al^{3+} doped spinel structured cathode active nanoparticles were produced by microwave hydrothermal synthesis. Structural characterization of as synthesized nanoparticles was performed by X-Ray Diffraction (XRD) Spectroscopy and Scanning Electron Microscopy (SEM). Electrochemical characteristics of the material have been investigated by packaging cell material into a CR 2016 button cells. All electrochemical experiments were carried out using lithium metal foil as the counter electrode. First discharge capacitiy of doped material is 303 mAh/g at 0.1 C rate. We have obtained 69 mAh/g specific capacity and 98.7 percent capacity retention for the first cycle at 0.5 C rate.

A Batch Adsorber Design for Rhodium Adsorption on Gallic Acid Formaldehyde Resin

100%

Can M., Bulut E., Örnek A.

Acta Physica Polonica A

2015

vol. 127

issue 4

1311-1313

The adsorption of rhodium (III) ions onto gallic acid formaldehyde resin in a batch adsorber has been studied. Adsorption experiments were carried out by agitating 1 g resin particles with 1000 ml of Rh (III) ion solution of the initial concentrations from 16.54 to 88.80 mg/l (293K, 1M HCl). Using Langmuir isotherm, a single stage batch adsorber was designed for different adsorbent mass/treated effluent volume ratios. An initial rhodium concentration of 100 g/m³ is assumed and the required amount of resin particles to recover metal ion content by 75%-99% at various volumes of effluents. For a single-stage adsorption system, thus the adsorbent demonstrated recovery capacity. For example, 1 m³ of solution is to be treated; the required masses of gallic acid resol resin are 25 kg for 75% rhodium removal. In order to recover 90% of the rhodium (III) at various volumes of solution which having different metal concentrations, the required amount of gallic acid resin was calculated. For example, 1 m³ of solution is to be treated, the required amounts of resin particles to reduce the rhodium content by 90% increased from 75 to 76 kg with increase in the initial rhodium metal concentration from 0.1 to 100 g/m³. Through such a projection, a real single stage adsorption system can be designed.

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2 Acta Physica Polonica A

1 2016

1 2015

2 Bulut E.

2 Can M.

1 Akbulut H.

1 Örnek A.

1 Özacar M.

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Electrochemical Characterization of Al^{3+} Doped Spinel Cathode Active Nanoparticles for Li-Ion Batteries

A Batch Adsorber Design for Rhodium Adsorption on Gallic Acid Formaldehyde Resin