The Effect of Fe and Al Substitution in LiNi0.8Co0.2O2 Cathode Material

Nurul Atikah Mohd Mokhtar; Azira Azahidi; Kelimah Elong; Nurhanna Badar; Norlida Kamarulzaman

doi:10.4028/www.scientific.net/AMR.895.355

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 895The Effect of Fe and Al Substitution in...

The Effect of Fe and Al Substitution in LiNi_0.8Co_0.2O₂Cathode Material

Abstract:

The effect of different cation substitution on the electrochemical performance of layered LiNi_0.8-xCo_0.2M_xO₂ (M= Fe, Al; x=0.1) cathode materials were investigated. LiNi_0.8-xCo_0.2M_xO₂ (M= Fe, Al; x=0.1) cathode materials were successfully synthesized by a combustion method with an annealing temperature of 800 °C for 24h. The physical and electrochemical properties of the materials were examined using X-ray Diffractometer (XRD), Field Emission Scanning Electron Microscopy (FESEM) and electrochemical charge-discharge. The XRD data showed that all the materials are single phase, hexagonal α-NaFeO2 type structure. The initial discharge capacity showed that Fe and Al substituted materials gave 8 % and 10 % improvement compared to LiNi_0.8Co_0.2O₂material. The discharge cycling also showed that the cycle stability has improved when Fe and Al was substituted. In view of electrochemical performance, Al containing sample was found to be superior to those of LiNi_0.8Co_0.2O₂and Fe substituted cathode materials.

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Periodical:

Advanced Materials Research (Volume 895)

Pages:

355-358

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.895.355

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Online since:

February 2014

Authors:

Nurul Atikah Mohd Mokhtar, Azira Azahidi, Kelimah Elong, Nurhanna Badar, Norlida Kamarulzaman

Keywords:

Cathode Material, Li Ni _0.8Co_0.2O₂, Li-Ion Battery

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