Synthesis and improved electrochemical performance of Al (OH)3-coated Li [Ni1/3Mn1/3Co1/3]O2 cathode materials at elevated temperature

Spherical Li[Ni1/3Co1/3Mn1/3]O2 powders were synthesized from LiOHH2O and coprecipitated spherical metal hydroxide, (Ni1/3Mn1/3Co1/3)(OH)2 and coated with Al(OH)3. The Al(OH)3-coated Li[Ni1/3Co1/3Mn1/3]O2 showed a capacity retention of 80% at 320mAg-1 (2 C-rate) based on 20mAg-1 (0.1 C-rate), while...

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Bibliographic Details
Published in:Electrochimica acta 2005-07, Vol.50 (20), p.4168-4173
Main Authors: JANG, S. B, KANG, S.-H, AMINE, K, BAE, Y. C, SUN, Y.-K
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
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Summary:Spherical Li[Ni1/3Co1/3Mn1/3]O2 powders were synthesized from LiOHH2O and coprecipitated spherical metal hydroxide, (Ni1/3Mn1/3Co1/3)(OH)2 and coated with Al(OH)3. The Al(OH)3-coated Li[Ni1/3Co1/3Mn1/3]O2 showed a capacity retention of 80% at 320mAg-1 (2 C-rate) based on 20mAg-1 (0.1 C-rate), while the pristine Li[Ni1/3Co1/3Mn1/3JO2 delivered only 45% at the same current density. Also, unlike pristine Li[Ni1/3Co1/3Mn1/3]O2, the Al(OH)3-coated Li[Ni1/3Co1/3Mn1/3]O2 cathode exhibits excellent rate capability and good thermal stability.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2005.01.037