Solution-combustion synthesized Al–Mo co-substituted cathode Li[Li0.2Ni0.13Co0.13Mn0.54]O2 for improving electrochemical performance of lithium ion batteries

• Published in: Journal of applied electrochemistry 2018, Vol.48 (1), p.75-84
• Main Authors: Ghorbanzadeh, Milad, Allahyari, E., Riahifar, R., Hadavi, S. M. M.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Combustion synthesis; Cycles; Discharge; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrochemistry; Electrodes; Electron microscopy; Electrons; Industrial Chemistry/Chemical Engineering; Lithium; Lithium-ion batteries; Materials substitution; Molybdenum; Physical Chemistry; Research Article
• ISSN: 0021-891X; 1572-8838
• DOI: 10.1007/s10800-017-1135-5

Li[Li 0.2 Ni 0.13− x + y /3 Co 0.13− x + y /3 Mn 0.54− x + y /3 ]Al x Mo y O 2 was synthesized via conventional solution combustion synthesis method. Microstructural characterizations were done by X-ray diffraction analysis and scanning electron microscopy, whereas electrochemical performance was evaluated by electrochemical tests. The electrochemical results indicated that Mo–Al doping has significant effect on capacity and cycling performance. The sample doped with Al ( x  = 0.015) and Mo ( y  = 0.015) exhibited higher cycling stability and higher capacity in comparison with those of non-substituted material. The initial discharge capacity for Mo–Al co-doped electrode was 265.5 mA h g −1 at 25 mA g −1 , and capacity retention after 50 cycles was 98.2%, whilst the initial discharge capacity for bare electrode was 239.1 mA h g −1 at 25 mA g −1 , and capacity retention after 50 cycles was 93%. Electrochemical impedance spectroscopy and cyclic voltammetry revealed that by the addition of Mo–Al, electrochemical performance of the Li[Li 0.2 Ni 0.13 Co 0.13 Mn 0.54 ]O 2 is improved. Graphical abstract