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Title:
ALL-SOLID-STATE LITHIUM SECONDARY BATTERY AND SECONDARY BATTERY SYSTEM PROVIDED WITH SAID SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2017/033480
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a bulk-type all-solid-state lithium secondary battery which is able to be used in a higher temperature environment in comparison to conventional nonaqueous electrolyte lithium secondary batteries, while achieving a good balance between charge/discharge characteristics and cycle characteristics at high levels. An all-solid-state lithium secondary battery according to the present invention is characterized in that: a positive electrode and a negative electrode are laminated, with a solid electrolyte layer being interposed therebetween; the positive electrode contains positive electrode active material particles, a first ion conducting layer and a second ion conducting layer; the positive electrode active material particles are in the form of secondary particles, in each of which primary particles aggregate; the first ion conducting layer is a substance that transmits lithium ions between the positive electrode active material particles and the second ion conducting layer, and covers the secondary particles, while filling up the gaps among the primary particles which constitute the secondary particles; the second ion conducting layer is a substance that transmits lithium ions between the first ion conducting layer and the solid electrolyte layer, and additionally covers the secondary particles that are covered by the first ion conducting layer; and the first ion conducting layer, the second ion conducting layer and the solid electrolyte layer are formed from substances that are different from each other.

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Inventors:
NISHIMURA KATSUNORI (JP)
KAWAJI JUN (JP)
FUKUCHI KUNIO (JP)
Application Number:
PCT/JP2016/057063
Publication Date:
March 02, 2017
Filing Date:
March 08, 2016
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
H01M10/052; H01B1/06; H01B1/08; H01B1/12; H01M4/13; H01M4/36; H01M4/62; H01M10/0562
Domestic Patent References:
WO2006018921A12006-02-23
WO2013121642A12013-08-22
WO2013073038A12013-05-23
WO2011145462A12011-11-24
Foreign References:
JP2007059409A2007-03-08
JP2015005398A2015-01-08
JP2008226463A2008-09-25
JP2013089321A2013-05-13
JP2013026003A2013-02-04
JP2012209106A2012-10-25
JPH117942A1999-01-12
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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