(19)
(11) EP 3 534 432 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
20.11.2019 Bulletin 2019/47

(43) Date of publication:
04.09.2019 Bulletin 2019/36

(21) Application number: 18880068.4

(22) Date of filing: 25.12.2018
(51) International Patent Classification (IPC): 
H01M 2/16(2006.01)
H01M 12/08(2006.01)
 H01M 10/30(2006.01)
(86) International application number:
PCT/JP2018/047686
(87) International publication number:
WO 2019/131688 (04.07.2019 Gazette 2019/27)
(84) Designated Contracting 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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 27.12.2017 JP 2017251005

(71) Applicant: NGK Insulators, Ltd.
Nagoya-shi Aichi 467-8530 (JP)

(72) Inventors:
  • OKOCHI, Sota
    Nagoya-Shi, Aichi 4678530 (JP)
  • YOKOYAMA, Shohei
    Nagoya-Shi, Aichi 4678530 (JP)

(74) Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)

   


(54) LDH SEPARATOR AND ZINC SECONDARY BATTERY


(57) Provided is a layered double hydroxide (LDH) separator capable of more effectively restraining short circuit caused by zinc dendrites. The LDH separator for secondary zinc batteries includes a porous substrate made of a polymer material; and a LDH plugging pores in the porous substrate. The LDH separator has a dendrite buffer layer therein, the dendrite buffer layer being at least one selected from the group consisting of: (i) a pore-rich internal porous layer in the porous substrate, the internal porous layer being free from the LDH or deficient in the LDH; (ii) a releasable interfacial layer, which is provided by two adjacent layers constituting part of the LDH separator being in releasable contact with each other; and (iii) an internal gap layer being free from the LDH and the porous substrate, which is provided by two adjacent layers constituting part of the LDH separator being formed apart from each other.