LITHIUM METAL COMPOSITE OXIDE, LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, AND LITHIUM SECONDARY BATTERY
Applicants
Sumitomo Metal Mining Co., Ltd.
Inventors
TAKAMORI Kenji, KOBAYASHI Ryota
Abstract
A lithium metal composite oxide into or from which lithium ions are dopable or dedopable, in which the lithium metal composite oxide contains at least nickel and satisfies all of the following requirements of (1) to (3). (1) A BET specific surface area is 1.0 m<sup>2</sup>/g or less. (2) When an average secondary particle diameter D<sub>50</sub> is indicated as X µm and a calculated particle diameter is indicated as Y µm, the ratio (X/Y) is 1.1 or more and 2.9 or less. Here, the calculated particle diameter is calculated by the following method. Calculated particle diameter (Y) = 2 × 3 / (BET specific surface area × tap density) (3) The ratio of the amount of residual lithium (mass%) contained in the lithium metal composite oxide to BET specific surface area (m<sup>2</sup>/g) (amount of residual lithium / BET specific surface area) is 0.25 or less.
IPC Classifications
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR