(19)

(11)

EP 3 918 650 A1

(12)

(43) Date of publication: 08.12.2021 Bulletin 2021/49 (21) Application number: 20704615.2 (22) Date of filing: 22.01.2020

(51) International Patent Classification (IPC):  H01M 2/16(2006.01) H01M 10/0525(2010.01) C09D 11/00(2014.01) (52) Cooperative Patent Classification (CPC): C09D 11/36; C09D 11/10; H01M 10/0525; H01M 50/446; Y02E 60/10; C09D 11/322; C09D 11/037; C09D 11/033 (86) International application number: PCT/JP2020/002148 (87) International publication number: WO 2020/158545 (06.08.2020 Gazette 2020/32)

(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: 28.01.2019 JP 2019012588 28.11.2019 JP 2019215743 (71) Applicant: Ricoh Company, Ltd. Tokyo 143-8555 (JP)	(72) Inventors: MATSUOKA, Kohji Tokyo 143-8555 (JP) HIGASHI, Ryuji Tokyo 143-8555 (JP) MASUZAWA, Masahiro Tokyo 143-8555 (JP) YANAGITA, Hideo Tokyo 143-8555 (JP) (74) Representative: Bradley, Susan Jane  Marks & Clerk LLP Fletcher House The Oxford Science Park Heatley Road Oxford OX4 4GE Oxford OX4 4GE (GB)