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Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2.

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2.
นักวิจัย : Madhavi, S. , Subba Rao, G. V. , Chowdari, B. V. R. , Li, S. F. Y.
คำค้น : DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2544
อ้างอิง : Madhavi, S., Subba Rao, G. V., Chowdari, B. V. R., & Li, S. F. Y. (2001). Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2. Journal of the electrochemical society, 148(11), A1279-A1286. , http://hdl.handle.net/10220/18842 , http://dx.doi.org/10.1149/1.1410968
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of the electrochemical society
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Compounds of the formula LiCo12yRhyO2 (0.0 ≤ y ≤ 0.20 and y=1.0) have been synthesized by high temperature solid-state reaction and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and infrared spectroscopy. Single-phase materials were obtained for y ≤ 0.10 and y=1.0 as observed by XRD. However, IR and electrochemical data indicate that the true solid solubility may be y ≤ 0.05. Their cathodic behavior in coin cells with Li metal as anode and a liquid electrolyte has been examined. Cyclic voltammograms and galvanostatic charge/discharge curves show that for y = 0.05, the phase transformation occurring at x = 0.5 in Li1-xCoO2 is suppressed and the deintercalation voltage is decreased. The compositions with y = 0.05 and 0.10 show improved cathodic behavior and discharge capacity retention compared to LiCoO2 (y = 0) at 0.14C rate in the voltage range 2.7-4.3 V up to 18 cycles. Electrochemical studies on LiRhO2 show that phase transitions occur on charge/discharge cycling (varying x in Li12xRhO2) in the voltage window 3.2-3.7 V and these are reversible. This compound shows an initial charge capacity of 162 mAh/g when charged to 4.0 V (vs. Li metal), corresponding to x = 0.85 in Li1-xRhO2. After an initial loss of 40 mAh/g in capacity, the discharge capacity retention corresponds to 90% after 18 cycles with respect to the initial discharge capacity in the voltage window, 2.7-4.0 V.

บรรณานุกรม :
Madhavi, S. , Subba Rao, G. V. , Chowdari, B. V. R. , Li, S. F. Y. . (2544). Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2..
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Madhavi, S. , Subba Rao, G. V. , Chowdari, B. V. R. , Li, S. F. Y. . 2544. "Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2.".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Madhavi, S. , Subba Rao, G. V. , Chowdari, B. V. R. , Li, S. F. Y. . "Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2.."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2544. Print.
Madhavi, S. , Subba Rao, G. V. , Chowdari, B. V. R. , Li, S. F. Y. . Synthesis and cathodic properties of LiCo1-yRhyO2 (0≤y≤0.2) and LiRhO2.. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2544.