(19)

(11)

EP 3 218 948 A1

(12)

(43) Date of publication: 20.09.2017 Bulletin 2017/38 (21) Application number: 15794280.6 (22) Date of filing: 11.11.2015

(51) International Patent Classification (IPC):  H01M 4/04(2006.01) H01M 4/139(2010.01) H01M 4/36(2006.01) H01G 11/86(2013.01) H01M 4/133(2010.01) H01M 4/1393(2010.01) H01G 11/28(2013.01) H01M 4/131(2010.01) (86) International application number: PCT/GB2015/053427 (87) International publication number: WO 2016/075465 (19.05.2016 Gazette 2016/20)

(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: MA MD (30) Priority: 14.11.2014 GB 201420309 (71) Applicant: Oxford University Innovation Limited Botley Oxford OX2 0JB (GB)	(72) Inventors: GRANT, Patrick Oxford Oxfordshire OX1 3PH (GB) HUANG, Chun Oxford Oxfordshire OX1 3PH (GB) (74) Representative: Braddon, Nicholas  Barker Brettell LLP 100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)