Microwave assisted synthesis and electrochemical behaviour of LiMg0.1Co0.9O2 for lithium rechargeable batteries

被引:28
作者
Zaheena, C. N. [2 ]
Nithya, C. [1 ]
Thirunakaran, R. [1 ]
Sivashanmugam, A. [1 ]
Gopukumar, S. [1 ]
机构
[1] CSIR, Cent Electrochem Res Inst, Karaikkudi 630006, Tamil Nadu, India
[2] Univ Calicut, Dept Chem, Thenhippalam, Kerala, India
关键词
Cathode material; Charge/discharge; Layered oxide; Lithium battery; Microwave assisted solution technique; CATHODE MATERIALS; ELECTRONIC-PROPERTIES; COMBUSTION SYNTHESIS; LICOO2; MG; PERFORMANCE; STABILITY; OXIDES;
D O I
10.1016/j.electacta.2008.11.009
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Layered LiMg0.1Co0.9O2 has been synthesized using microwave assisted solution technique. The precursor has been subjected to thermo-gravimetric/differential thermal analysis (TG/DTA) and calcined at 850 degrees C. The precursor and the calcined powders were characterized by X-ray diffraction (XRD) to confirm the formation of single-phase layered material. Fourier transform infrared (FTIR) studies were carried out to understand the nature of the metal-ligand bond and the observations were consistent with the XRD spectrum. Scanning (SEM) and transmission electron microscope (TEM) images have been obtained to understand the surface morphology and the grain orientation of the synthesized material. Coin cells of 2016 type have been assembled using the synthesized layered material as the cathode active material, lithium foil as the counter and reference electrodes and 1 M LiPF6, in 1:1 EC/DEC as the electrolyte. Coin cells were assembled and crimp sealed inside an argon filled glove box. The charge/discharge characteristics of the coin cells were evaluated galvanostatically in the potential range 2.7-4.3 V. Results indicate that LiMg0.1Co0.9O2 delivers an average discharge capacity of similar to 135 mAh g(-1) over the investigated 20 cycles and is a potential candidate for use as cathode material in lithium rechargeable cells. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2877 / 2882
页数:6
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