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Sol-Gel Synthesis of Nanocomposite Cu-Li₄Ti₅O_{12} Structures for Ultrahigh Rate Li-Ion Batteries

100%

Erdas A., Ozcan S., Guler M., Akbulut H.

Acta Physica Polonica A

2015

vol. 127

issue 4

1026-1028

In this study, spinel Li₄Ti₅O_{12} materials were successfully synthesized by a simple and facile sol-gel process and electroless copper deposition techniques. The characteristics of the as-prepared Li₄Ti₅O_{12} and Cu-Li₄Ti₅O_{12} were examined by X-ray diffraction and scanning electronic microscopy, while the electrochemical performances including charge/discharge and rate performance tests were also investigated. Cu-Li₄Ti₅O_{12} electrode demonstrated the superior initial discharge capacity and rate capability to Li₄Ti₅O_{12} electrode, cycled between 1.0 and 2.5 V. The enhanced rate capability can be attributed to the higher Li^{+} diffusivity and lower charge-transfer resistance due to the electroless deposition of copper. Moreover, when both electrodes discharged with 80 C state of discharge conditions, the reversible capacities were further increased ım70 mAh g^{-1} with excellent cycling stability and almost no irreversible capability was observed during cycling.

Influence of Annealing Temperature on the Electrical and Optical Properties of CdS Thin Films

100%

Elmas S., Ozcan S., Ozder S., Bilgin V.

Acta Physica Polonica A

2012

vol. 121

issue 1

56-58

CdS thin films were grown onto glass substrates at the substrate temperature of 573 ± 5 K by ultrasonic spray pyrolysis technique. The electrical and optical properties of the films were characterized before and after thermal annealing by using electrical resistivity measurements and UV/VIS spectrophotometer, respectively. Thermal annealing of CdS films was carried out in air ambient at various annealing temperatures from 473 to 673 K. The variation in electrical conductivity and optical parameters such as transmittance, absorbance and energy band gap of the films with thermal annealing temperature was investigated.

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2 Acta Physica Polonica A

1 2015

1 2012

2 Ozcan S.

1 Akbulut H.

1 Bilgin V.

1 Elmas S.

1 Erdas A.

1 Guler M.

1 Ozder S.

Search results

Sol-Gel Synthesis of Nanocomposite Cu-Li₄Ti₅O_{12} Structures for Ultrahigh Rate Li-Ion Batteries

Influence of Annealing Temperature on the Electrical and Optical Properties of CdS Thin Films