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Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries
นักวิจัย : Sharma, N. , Shaju, K. M. , Rao, G. V. Subba , Chowdari, Bobba V. R. , Dong, Zhili , White, Timothy John
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2547
อ้างอิง : Sharma, N., Shaju, K. M., Rao, G. V. S., Chowdari, B. V. R., Dong, Z. L., & White, T. J. (2004). Carbon-Coated Nanophase CaMoO4 as Anode Material for Li Ion Batteries, Chemistry of Materials, 16(3), 504-512. , http://hdl.handle.net/10220/7447 , http://dx.doi.org/10.1021/cm0348287
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Chemistry of materials
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Pure and carbon (C)-coated CaMoO4 were synthesized by solution precipitation and solgel methods, and their electrochemical properties were studied vs Li by galvanostatic cycling and cyclic voltammetry (CV). Combined X-ray diffraction, SEM, and TEM results revealed the formation of nanocrystalline particles with the scheelite structure, the morphology being a function of the synthetic procedure. TEM of 10% C-coated CaMoO4 shows the amorphous nature of carbon on the crystalline particles with a thickness of 8-12 nm. Galvanostatic data in the voltage range of 0.005-2.5 V up to 50 cycles at a rate of 60 mA/g revealed that the 10% C-coated CaMoO4 gave the highest reversible capacities. At the 20th discharge cycle, the capacity values (mA h/g) are as follows: solution precipitated, 190; sol-gel, 268; 5% C-coated, 401; and 10% C-coated, 508. The latter value corresponds to 3.8 mol of recyclable Li. The improvement in the interparticle electronic conductivity imparted by the C-coating led to superior performance. The Coulombic efficiency for all the compositions is >98%. Galvanostatic cycling results are supplemented by the CV data. A plausible mechanism for charge-discharge cycling has been proposed.

บรรณานุกรม :
Sharma, N. , Shaju, K. M. , Rao, G. V. Subba , Chowdari, Bobba V. R. , Dong, Zhili , White, Timothy John . (2547). Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sharma, N. , Shaju, K. M. , Rao, G. V. Subba , Chowdari, Bobba V. R. , Dong, Zhili , White, Timothy John . 2547. "Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sharma, N. , Shaju, K. M. , Rao, G. V. Subba , Chowdari, Bobba V. R. , Dong, Zhili , White, Timothy John . "Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2547. Print.
Sharma, N. , Shaju, K. M. , Rao, G. V. Subba , Chowdari, Bobba V. R. , Dong, Zhili , White, Timothy John . Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2547.