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LITHIUM COMPOSITE OXIDE SINTERED BODY PLATE AND LITHIUM SECONDARY BATTERY
Disclosed is a lithium complex oxide sintered plate including a plurality of primary grains having a layered rock-salt structure, the primary grains being bonded. The lithium complex oxide has a composition represented by the formula: Lix(Co1-yMy)O2±δ(wherein, 1.0≤x≤1.1, 0<≤50.1, 0≤δ<1, and M is at least one selected from the group consisting of Mg, Ni, Al ,and Mn), and the primary grains have a mean tilt angle of more than 0° to 30° or less, the mean tilt angle being a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate. A positive electrode of the lithium complex oxide sintered plate incorporated into a lithium secondary battery does not cause undesirable behaviors, such as a sharp drop in voltage and deterioration of cycle performance due to noisy turbulence in a waveform of the charge/discharge curve in a cycle test involving a constant voltage (CV) charge or a high-rate charge/discharge.
LITHIUM COMPOSITE OXIDE SINTERED BODY PLATE AND LITHIUM SECONDARY BATTERY
Disclosed is a lithium complex oxide sintered plate including a plurality of primary grains having a layered rock-salt structure, the primary grains being bonded. The lithium complex oxide has a composition represented by the formula: Lix(Co1-yMy)O2±δ(wherein, 1.0≤x≤1.1, 0<≤50.1, 0≤δ<1, and M is at least one selected from the group consisting of Mg, Ni, Al ,and Mn), and the primary grains have a mean tilt angle of more than 0° to 30° or less, the mean tilt angle being a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate. A positive electrode of the lithium complex oxide sintered plate incorporated into a lithium secondary battery does not cause undesirable behaviors, such as a sharp drop in voltage and deterioration of cycle performance due to noisy turbulence in a waveform of the charge/discharge curve in a cycle test involving a constant voltage (CV) charge or a high-rate charge/discharge.
LITHIUM COMPOSITE OXIDE SINTERED BODY PLATE AND LITHIUM SECONDARY BATTERY
LITHIUM-MISCHOXID-SINTERKÖRPERPLATTE UND LITHIUMSEKUNDÄRBATTERIE
PLAQUE DE CORPS FRITTÉ D'OXYDE COMPOSITE DE LITHIUM ET BATTERIE SECONDAIRE AU LITHIUM
YURA YUKINOBU (author) / OKADA SHIGEKI (author)
2023-08-23
Patent
Electronic Resource
English
LITHIUM COMPOSITE OXIDE SINTERED BODY PLATE AND LITHIUM SECONDARY BATTERY
| European Patent Office | 2018