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Effect of low Al 3+ doping on the structural, electrochemical performances, and thermal stability of the LiNi 1 / 3 Co 1 / 3 Co 1 / 3 O 2 electrode material for lithium‐ion batteries
Author(s) -
Kaddami Abderrahman,
Ouzaouit Khalid,
Lamsayety Isam,
Faqir Hakim,
Benzakour Intissar,
Saadoune Ismael
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6732
Subject(s) - electrochemistry , faraday efficiency , doping , lithium (medication) , materials science , electrode , cathode , analytical chemistry (journal) , thermal stability , ion , metal , chemical engineering , chemistry , metallurgy , optoelectronics , medicine , organic chemistry , chromatography , engineering , endocrinology
Summary A series of Al‐doping Li(Ni 1/3 Co 1/3 Mn 1/3 ) 1‐y Al y O 2 (y = 0, 0.0001, 0.0002, 0.0003, and 0.0004) electrode materials were prepared via an optimized co‐precipitation method using high‐purity metal sulfates produced by Managem (Morocco), and at low‐synthesis temperature of 750°C. Refinement of the X‐ray diffraction patterns reveals the formation of pure layered oxides with no obvious change in the hexagonal unit‐cell parameters. Li(Ni 1/3 Co 1/3 Mn 1/3 ) 1‐y Al y O 2 electrode materials were tested as electrode for lithium‐ion batteries in the voltage range of 2.5 to 4.25 V vs Li + /Li. Discharge capacities of around 160 mAh/g were achieved with an obvious enhancement of the electrochemical performance although the rate of Al‐doping is very small. 0.02% Al‐doping exhibits better coulombic efficiency (98%) and a capacity retention of 98% at the 50th cycle. Safety tests were also investigated for delithiated cathode materials Li y (Ni 1/3 Co 1/3 Mn 1/3 ) 1‐y Al y O 2 recovered at the end of the charge process. Once again, the composition corresponding to 0.02% Al‐doping shows the best safety parameters compared to the NCM(111) reference material (T onset = 289°C; ΔH = 738 J/g).