Solid-state battery

Contents

Solid-state battery Solid-state batteries are rechargeable energy storage devices that replace liquid or gel electrolytes with solid ionic conductors. They have been pursued as next-generation alternatives to conventional lithium-ion cells developed by John B. Goodenough, Stanford University, Sony, Panasonic, and Tesla, Inc. for improved energy density, safety, and cyclability. Leading research and commercialization efforts involve institutions such as MIT, Toyota, Samsung Electronics, LG Chem, Solid Power, QuantumScape, and Toyota Research Institute.

Overview

Solid-state batteries use a solid electrolyte between electrodes, enabling ion transport without flammable liquid electrolytes used in cells by Sony, Panasonic, or Samsung SDI. Development draws on research from Argonne National Laboratory, Lawrence Berkeley National Laboratory, Oak Ridge National Laboratory, and university groups at University of California, Berkeley, University of Michigan, University of Oxford, and Tohoku University. Industrial partnerships include Volkswagen Group, Ford Motor Company, BMW, Nissan Motor Company, and energy companies such as ExxonMobil exploring materials supply chains. Policy and funding have been influenced by programs at U.S. Department of Energy and initiatives led by European Commission and Japan Ministry of Economy, Trade and Industry.

Early concepts trace to solid electrolytes studied by researchers like Michael Faraday and later by specialists at Bell Labs and IBM Research. Commercial lithium-ion batteries emerged from innovations by John B. Goodenough, Stanford University affiliates, and Sony, prompting solid-state efforts at Toyota and Hitachi. Milestones include prototype announcements from Toyota, cell reports from Panasonic, and venture-backed projects from QuantumScape and Solid Power. Major automotive announcements by Volkswagen Group, Ford Motor Company, and Honda accelerated investment cycles, while consortiums including CATL and SK Innovation formed cross-border collaborations. Academic milestones include publications in journals by researchers affiliated with Harvard University, Columbia University, ETH Zurich, and Seoul National University.

Typical solid-state cells mirror architecture developed by companies such as Sony and labs at MIT: an anode, a cathode, and a solid electrolyte, sometimes with interlayers or coatings developed at SRI International, Argonne National Laboratory, and Fraunhofer Society. Anodes under study include metallic lithium pioneered in work by John B. Goodenough groups and hosted in projects with QuantumScape and Solid Power; cathodes often employ layered oxides similar to materials investigated by Sumitomo Chemical and Umicore. Interfaces are engineered using techniques from Toshiba, Panasonic, Hitachi Zosen, and university labs such as Imperial College London and Kyoto University. Manufacturing methods adapt processes from battery plants operated by Panasonic Energy and LG Energy Solution.

Solid electrolytes fall into major families: oxide ceramics researched at Tohoku University and Ceramatec, sulfide conductors developed by NEC Corporation and Fujifilm, and polymer electrolytes advanced at DuPont and BASF. Representative materials include garnet-type oxides inspired by studies at University of Texas at Austin, NASICON-type materials from groups at University of St Andrews, argyrodite sulfides explored at Argonne National Laboratory, and polyethylene oxide polymers evaluated at MIT and University of California, San Diego. Cathode chemistries leverage layered nickel-cobalt-manganese compositions similar to those in cells by LG Chem and Samsung SDI, while research into high-voltage cathodes involves teams at Oak Ridge National Laboratory and National Renewable Energy Laboratory. Additives and coatings developed by BASF and Evonik Industries address interfacial stability.

Predicted advantages were highlighted in technical roadmaps from U.S. Department of Energy and analysis by International Energy Agency: higher gravimetric and volumetric energy density pursued by Tesla, Inc. and Toyota; improved safety emphasized in reports by National Highway Traffic Safety Administration and accident studies involving National Transportation Safety Board; and faster calendar life targeted by manufacturers such as Panasonic and Samsung Electronics. Performance metrics reported by startups like QuantumScape and Solid Power include higher cycle life and reduced thermal runaway risk compared with classical lithium-ion designs commercialized by Sony and Panasonic. Benefits for aerospace programs at NASA and defense projects at DARPA are also under evaluation.

Several technical and commercial hurdles are documented by research groups at MIT, Harvard University, Lawrence Berkeley National Laboratory, and industry teams at Volkswagen Group and Toyota Motor Corporation. Key issues include solid–solid interfacial resistance studied by IBM Research and dendrite formation observed in experiments from University of California, San Diego and Argonne National Laboratory. Mechanical brittleness of ceramic electrolytes is a concern for scale-up in factories run by Panasonic Energy and LG Energy Solution, and ion conductivity at room temperature remains lower in some materials compared to liquid electrolytes per reports by Oak Ridge National Laboratory. Manufacturing costs, raw material supply chains involving Albemarle Corporation and Livent Corporation, and certification requirements set by agencies like UL and IEC are additional barriers.

Target markets include electric vehicles pursued by Toyota, Volkswagen Group, Ford Motor Company, General Motors, and BMW; portable electronics produced by Apple Inc. and Samsung Electronics; and stationary storage explored by NextEra Energy and Siemens Energy. Commercial pilots and partnerships have been announced between QuantumScape and Volkswagen Group, Solid Power and BMW Group, and collaborations involving Toyota with multiple suppliers including Denso Corporation and Panasonic Corporation. Aerospace applications attract interest from Boeing and Airbus, while defense contracts involve U.S. Department of Defense programs. Market analysis by firms such as BloombergNEF and McKinsey & Company outlines timelines for adoption and supply-chain scaling led by battery manufacturers like Contemporary Amperex Technology Co. Limited and SK Innovation.

Category:Battery technology