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Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling
นักวิจัย : Amaresh, Samuthirapandian , Kim, G. J. , Karthikeyan, K. , Aravindan, Vanchiappan , Chung, K. Y. , Cho, B. W. , Lee, Y. S.
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Amaresh, S., Kim, G. J., Karthikeyan, K., Aravindan, V., Chung, K. Y., Cho, B. W., et al. (2012). Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling. Physical Chemistry Chemical Physics, 14(34), 11904-11909. , http://hdl.handle.net/10220/11020 , http://dx.doi.org/10.1039/C2CP41624G
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical chemistry chemical physics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Lithium cobalt fluorophosphate, Li2CoPO4F, is successfully synthesized by a solid state reaction under Ar flow at 700 °C. X-ray diffraction and scanning electron microscopic studies are utilized to analyze the structural and morphological features of the synthesized materials, respectively. The presence of fluorine is also supported by energy-dispersive X-ray spectroscopy. The electrochemical properties are evaluated by means of Li/Li2CoPO4F half-cell configurations in both potentiostatic and galvanostatic modes. The Li/Li2CoPO4F cell delivers an initial discharge capacity of 132 mA h g−1 at a current density of 0.1 mA cm−2 between 2.0 and 5.1 V at room temperature. Due to the higher operating potential of the Co2+/3+ couple in the fluorophosphate matrix, this cell shows a capacity retention of only 53% after 20 cycles, still the material delivered 108 mA h g−1 at a high current rate of 1 C. Cyclic voltammetric studies corroborate the insertion and extraction of Li+ ions by a single phase reaction mechanism during cycling.

บรรณานุกรม :
Amaresh, Samuthirapandian , Kim, G. J. , Karthikeyan, K. , Aravindan, Vanchiappan , Chung, K. Y. , Cho, B. W. , Lee, Y. S. . (2555). Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Amaresh, Samuthirapandian , Kim, G. J. , Karthikeyan, K. , Aravindan, Vanchiappan , Chung, K. Y. , Cho, B. W. , Lee, Y. S. . 2555. "Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Amaresh, Samuthirapandian , Kim, G. J. , Karthikeyan, K. , Aravindan, Vanchiappan , Chung, K. Y. , Cho, B. W. , Lee, Y. S. . "Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Amaresh, Samuthirapandian , Kim, G. J. , Karthikeyan, K. , Aravindan, Vanchiappan , Chung, K. Y. , Cho, B. W. , Lee, Y. S. . Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.