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The Studies on Synthesis of LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 ( LiNCM ) as a Cathode Material Prepared by Thermal Degradation of Oxalate Anion
Author(s) -
Kim Sang Hern
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10244
Subject(s) - oxalate , aqueous solution , tetrahydrate , cobalt , nuclear chemistry , manganese , nickel , materials science , inorganic chemistry , chemistry , analytical chemistry (journal) , crystal structure , crystallography , metallurgy , chromatography
In this study, LiNCM [Li(Ni 1/3 Co 1/3 Mn 1/3 )] powder was synthesized by thermal degradation of oxalate anion. It is more stable than LiCoO 2 and also has a higher capacity than LiNiO 2 . NCM [(Ni 1/ 3 Co 1 / 3 Mn 1 /3 ) C 2 O 4 · xH 2 O (s)] was synthesized by mixing ammonium oxalate monohydrate, nickel nitrate hexahydrate, cobalt nitrate hexahydrate, and manganese acetate tetrahydrate in aqueous solution. The solution was centrifuged and the precipitation residue was dried for 3 h at 200 °C. The obtained precursor powder of NCM was mixed with LiOH and sintered at 850 °C for 24 h. Annealing at 500 °C was performed again, to obtain the crystalline form of the LiNCM . With the sintered and annealed LiNCM , cathode was fabricated by mixing polyvinylidene fluoride and Super‐P in N ‐methylpyrrolidone. Its charge–discharge voltages profile, C‐rate test, and cycle life test were investigated.