Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/150843
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a nonaqueous electrolyte secondary battery which has enhanced durability against a charge and discharge cycle. The present invention pertains to a nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as a negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm3/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm3/g or less. Further, the first positive electrode active material is configured such that the volume per unit mass of pores having a pore size of 100 nm or less therein is at least four times as much as the volume per unit mass of pores having a pore size of 100 nm or less in the second positive electrode active material, and that the content of the first positive electrode active material accounts for 30 mass% or less with respect to the total amount of the first and second positive electrode active materials. Furthermore, a nonaqueous electrolyte which contains a lithium salt having an oxalate complex as an anion is used.
Inventors:
KO TAKASHI
NIINA FUMIHARU
YANAGIDA KATSUNORI
BABA YASUNORI
MORIKAWA YUKI
NIINA FUMIHARU
YANAGIDA KATSUNORI
BABA YASUNORI
MORIKAWA YUKI
Application Number:
PCT/JP2018/002389
Publication Date:
August 23, 2018
Filing Date:
January 26, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M10/0525; H01M4/36; H01M4/525; H01M4/587; H01M10/0568
Domestic Patent References:
| WO2013115390A1 | 2013-08-08 |
Foreign References:
| JP2015026594A | 2015-02-05 | |||
| JP2005123179A | 2005-05-12 | |||
| JP2008091236A | 2008-04-17 | |||
| JP2011091005A | 2011-05-06 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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