Effect of particle shape on the electrochemical properties of CaSnO 3 as an anode material for lithium-ion batteries Batteries

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[1] Kim, Hyun Sik
[2] Park, Sang-Sun
[3] Kang, Soon Hyung
[4] Sung, Yung-Eun
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Kang, S.H. (skang@jnu.ac.kr) | 1600年 / Kluwer Academic Publishers卷 / 44期
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Cubic and star-shaped CaSnO3 particles with a perovskite structure were synthesized successfully using a simple hydrothermal method at a low temperature of 140°C. The structure and morphology of the CaSnO 3 powders were characterized using X-ray diffraction; X-ray photoelectron spectroscopy; and scanning electron microscopy. The electrochemical properties of the CaSnO3 as anode materials for lithium-ion batteries were tested by constant current discharge/charge and cyclic voltammetry. The large irreversible capacity in the initial cycle was similar to that of tin oxide; due to the decomposition of tin oxide into metallic tin and Li2O; followed by a reversible Li-Sn formation. The reversible capacity of the cubic CaSnO3 was 382 mAh g-1 in the first cycle and was maintained at 365 mAh g-1 in the following cycles. The cubic CaSnO3 particles had a higher reversible capacity than the star-shaped CaSnO3 particles and retained a capacity of about 365 mAh g-1 after 60 cycles as well as good cycle stability; showing potential as attractive anode materials for lithium-ion batteries. It is found that the particle shape had a marked effect on electrochemical performance. © 2014 Springer Science+Business Media Dordrecht;
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