Abstract
Single_phase solid solution of LiNi 0.8- x Al x Co 0.2 O 2 (0≤ x <0.1)had been synthesized and characterized by X_ray diffraction(XRD) and scanning electron microscopy (SEM). Their electrochemical performance was examined by charge_discharge cycling.The LiNi 0.71 Al 0.09 Co 0.2 O 2 compound showed a discharge capacity of 152 mAh/g after 20 cycles that corresponds to 97.4% capacity retention. The beneficial effect of co_doping with Al and Co elements was corro_borated by slow scanning cyclic voltammograms(SSCV),electrochemical impedance spectrum(EIS)and differential scanning calorimetry(DSC) data on charged cathodes. These results show that the 2D_character of the crystal lattice was stabilized by co_doping with Al and Co, the phase transitions that occur during deintercalation or intercalation of Li_ions were significantly suppressed,and thermal stability in the charged state was also improved.
Keywords
Lithium ion battery, Cathode material, LiNiO 2, Doped
Publication Date
2002-08-28
Online Available Date
2002-08-28
Revised Date
2002-08-28
Received Date
2002-08-28
Recommended Citation
Jun ZHANG, Zhong-kao JIN, Qing-he YANG, Qing-mei SONG, Xiao-hua MA, Xiang-fu ZONG.
Synthesis and Characterization of LiNi_(0.8-x)Al_xCo_(0.2)O_2 as Cathodes for Lithium-ion Batteries[J]. Journal of Electrochemistry,
2002
,
8(3): 306-314.
DOI: 10.61558/2993-074X.1464
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol8/iss3/6
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