Here is a list of companies involved insolid state / polymar battery development....
"""Players discussed in this report:
24M, Applied Materials, BatScap (Bollor Group) / Bathium, Beijing Easpring Material Technology, BMW, BrightVolt, BYD, CATL, Cenat, CEA Tech, China Aviation Lithium Battery, Coslight, Cymbet, EMPA, Enovate Motors, FDK, Fisker Inc., Flashcharge Batteries, Fraunhofer Batterien, Front Edge Technology, Ganfeng Lithium, Giessen University, Guangzhou Great Power, Guoxuan High-Tech Power Energy, Hitachi Zosen, Hyundai, Ilika, IMEC, Infinite Power Solutions, Institute of Chemistry Chinese Academy of Sciences, Ionic Materials, ITEN, Jiawei Long powers Solid-State Storage Technology RuGao City Co.,Ltd, JiaWei Renewable Energy, Johnson Battery Technologies, Kalptree Energy, Magnis Energy Technologies, Mitsui Metal, Murata, National Battery, National Interstellar Solid State Lithium Electricity Technology, NGK/NTK, Ningbo Institute of Materials Technology & Engineering, CAS, Oak Ridge Energy Technologies, Ohara, Panasonic, Planar Energy, Polyplus, Prieto Battery, ProLogium, Qing Tao Energy Development Co., QuantumScape, Sakti 3, Samsung SDI, Schott AG, SEEO, Solidenergy, Solid Power, Solvay, Sony, STMicroelectronics, Taiyo Yuden, TDK, Tianqi Lithium, Toshiba, Toyota, ULVAC, University of Mnster, Volkswagen, Wanxian A123 Systems, WeLion New Energy Technology, Zhongtian Technology""""