Patent SG-11202000089T-A (SG)
Title: Cathode slurry for lithium ion battery
Inventor: HO KAM PIU
IPC: H01M4/04
Filed: 2017-09-29
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 19 April 2018 (19.04.2018) lin ion omits onolo DINIEMEWIRIDERE DIS (10) International Publication Number WO 2018/068662 Al WIPO I PCT (51) International Patent Classification: HO1M 4/02 (2006.01) HO1M 4/04 (2006.01) (21) International Application Number: PCT/CN2017/104239 UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art 21(3)) (22) International Filing Date: 29 September 2017 (29.09.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/406,402 11 October 2016 (11.10.2016) US (71) Applicant: GRST INTERNATIONAL LIMITED [CN/CN]; Room 2201-2203, 22/F, Yardley Commercial Building, 3 Connaught Road West, Sheung Wan, Hong Kong (CN). (72) Inventors: HO, Kam Piu; Unit 107, 1/F, Bio-Infoi iat- ics Centre, No. 2 Science Park West Avenue, Hong Kong Science Park, Shatin, New Territories, Hong Kong (CN). WANG, Ranshi; Unit 107, 1/F, Bio-Infoiinatics Centre, No. 2 Science Park West Avenue, Hong Kong Science Park, Shatin, New Territories, Hong Kong (CN). SHEN, Pei- hua; No.1 Building, No.19 Street, Fengxiangyuan, Phoenix City, Xintang, Zengcheng, Guangzhou, Guangdong 511340 (CN). (74) Agent: YONG HUI INTELLECTUAL PROPERTY; HUANG, Xin, Room 614, 6/F, Hualian Building, No. 2008 Shennan Middle Road, Futian District, Shenzhen, Guang- dong 518031 (CN). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, GC O GC O 1-1 C•1 C (54) Title: CATHODE SLURRY FOR LITHIUM ION BATTERY (57) : Provided herein is a lithium-ion battery cathode slurry, comprising: a cathode active material, a conductive agent, a binder material, and a solvent, wherein the cathode active material has a particle size D50 in the range from about 10 pm to about 50 pm, and wherein the slurry coated onto a current collector having a wet film thickness of about 100 pm has a drying time of about 5 minutes or less under an environment having a temperature of about 60 °C to about 90 °C and a relative humidity of about 25% to about 40%. The cathode slurry disclosed herein has homogeneous ingredient dispersion and quick drying capability for making a lithium-ion battery with high quality and consistent perfonnance. In addition, these properties of the cathode slurry increase productivity and reduce the cost of manufacturing lithium-ion batteries.