Solid-state batteries are sparking a new era in energy storage. They’re safer, pack more power, and charge faster than traditional lithium-ion batteries. And for industries like electric vehicles, consumer tech, and renewable energy, this breakthrough couldn’t come at a better time.
In this report, we spotlight 20 companies racing to make solid-state batteries a reality. From car makers to tech startups, these players are on the frontlines, pushing boundaries every day. Each one is tackling the challenges of scale, cost, and durability with innovative approaches that could change the way we power our lives.
This report delves into the pioneering efforts of industry leaders like Samsung SDI Co Ltd and Hyundai Motor Co, who are at the forefront of pushing the boundaries in solid-state battery technology.
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Let’s dive into the innovations driving this revolution and see what the future holds for energy storage.
#1 SAMSUNG SDI CO., LTD.
Headquarters: Yongin, Gyeonggi-do, South Korea
Samsung SDI is a leader in rechargeable batteries, focusing on innovative, high-performance solutions for EVs and energy storage.
Key Patents in Solid State Battery
All Solid Battery (US2022115690A1)
An all solid battery includes a cell stack including a negative electrode, a solid electrolyte layer, and a positive electrode, a case to accommodate the cell stack, and a buffer material to pressure the cell stack in the case.
All-Solid-State Secondary Battery (US2023378431A1)
This all-solid-state battery includes a positive electrode, a negative electrode, and a solid electrolyte in between. The positive electrode has a central and surrounding active material layer, while the negative electrode includes an active material layer on its collector.
All-Solid-State Battery (WO2021225346A1)
An all-solid-state battery includes a buffer layer between stacked battery units, each with sequentially layered positive, solid electrolyte, and negative electrode layers.
#2 HYUNDAI MOTOR COMPANY
Headquarters: Seoul, South Korea
Hyundai Motor Company is investing in solid-state batteries to enhance safety and efficiency in its electric vehicles.
Key Patents in Solid State Battery
Solid State Battery With High Energy Density And Stable Operation (DE102020130352A1)
The specified battery is a solid-state battery (1) without an anode, which has a novel structure, has a high energy density and can be operated stably.
All Solid State Battery with Improved Durability and Method for Manufacturing the Same (US2022181700A1)
An all-solid-state battery has a cathode active material layer, a solid electrolyte layer with central and peripheral parts, an anode layer larger than the cathode, and a spacer on the electrolyte layer.
#3 SAFT
Headquarters: Levallois-Perret, France
Saft develops advanced batteries for industrial applications, specializing in high-performance, reliable energy solutions.
Key Patents in Solid State Battery
Electrochemical Element, As Well As Modules And Batteries Containing Same (WO2021105433A1)
The present invention relates to an electrochemical element, in particular a sulphur-containing solid electrolyte, comprising a protective casing, as well as to the modules and batteries comprising such elements.
Electrochemical element for battery, and corresponding battery (FR3123159A1)
This electrochemical battery element includes first and second electrodes with connection members, enclosed by an envelope with two walls and edges forming a geometric shape, positioning both connection members at one corner.
#4 TDK CORPORATION
Headquarters: Tokyo, Japan
TDK Corporation focuses on solid-state battery advancements to boost energy density and safety across multiple sectors.
Key Patents in Solid State Battery
Battery and manufacturing method thereof (CN116583974A)
The battery includes a storage element with a positive electrode, negative electrode, and solid electrolyte layer in between, housed in a casing with internal pressure under 101.3 kPa.
Battery and battery manufacturing method (CN116670863A)
The battery includes a positive electrode, negative electrode, and solid electrolyte layer, enclosed in a casing, with moisture content in the storage space kept below 1100 ppmv.
#5 MAXELL, LTD.
Headquarters: Kyoto, Japan
Maxell is known for high-quality batteries and is exploring solid-state technology to power future electronics and automotive applications.
Key Patents in Solid State Battery
All-Solid-State Battery And Production Method Therefor (WO2024070579A1)
The all-solid-state battery, aligned with SDGs 3, 7, 11, and 12, features multiple power generation elements with positive and negative electrodes, connected via current collectors, and has a thickness of 0.5-6.0 mm and area of 10-1,000 mm².
All-Solid-State Battery (WO2023054333A1)
This all-solid-state battery, supporting SDGs 3, 7, 11, and 12, includes a laminated structure with a positive and negative electrode separated by a porous, solid electrolyte sheet, maintaining minimum distances of 1 μm and 3 μm from each electrode, respectively, to prevent charging abnormalities.
#6 MURATA MANUFACTURING CO., LTD.
Headquarters: Nagaokakyo, Kyoto, Japan
Murata Manufacturing is advancing solid-state batteries, emphasizing safety and efficiency in consumer and industrial electronics.
Key Patents in Solid State Battery
Solid state battery (WO2020195310A1)
This lithium-ion solid-state battery features a laminate structure with terminals on one side, a negative electrode active below -2V, and non-reactive terminal material for lithium ions.
Solid state battery (WO2020195381A1)
This solid-state battery features a laminate with positive and negative electrodes separated by a solid electrolyte, terminals on opposite sides, and reduced active material in the terminal contact areas.
#7 TECHNISCHE UNIVERSITEIT DELFT
Headquarters: Delft, Netherlands
Delft University of Technology leads research in materials science to improve solid-state battery performance and reliability.
Key Patent in Solid State Battery
Solid Ionic Conductive Additive In Electrodes For Lithium-Ion Batteries Using Liquid Electrolyte (WO2021091387A1)
The present invention is in the field of high electric energy density storage devices, typically Li- or Na-comprising power units, which may be used as a battery pack, a car battery, an electrical energy storage device in general, and may be incorporated in portable electronics. It is aimed at improving power unit performance, e.g. in terms of cycle life and coulombic efficiency.
#8 PRESIDENT AND FELLOWS OF HARVARD COLLEGE
Headquarters: Cambridge, Massachusetts, USA
Harvard University researchers are pioneering new approaches to make solid-state batteries safer and more efficient.
Key Patent in Solid State Battery
Batteries With Solid State Electrolyte Multilayers (WO2022094412A1)
The invention provides rechargeable solid state batteries with multilayers of solid state electrolytes. The rechargeable solid state batteries disclosed herein are advantageous as they provide improved battery cycling performance combined with excellent power and energy density.
#9 SES HOLDINGS PTE. LTD.
Headquarters: Singapore
SES Holdings develops hybrid solid-state batteries, targeting higher energy density for electric vehicles.
Key Patent in Solid State Battery
Rechargeable Battery (US2024063438A1)
Battery core packs employing specific electrolyte solutions and minimum cell-face pressures and methods are disclosed for minimizing dendrite growth and increasing cycle life of metal and metal-ion battery cells.
#10 VOLKSWAGEN AG
Headquarters: Wolfsburg, Germany
Volkswagen is pushing solid-state battery research to enhance EV range, safety, and mass-market viability.
Key Patent in Solid State Battery
Energy Storage System And Motor Vehicle (EP4057413A3)
This energy store for motor vehicles includes a secondary cell with two electrodes, a separator, electrolyte-filled housing, and hollow glass spheres containing additional electrolyte or additives in contact with the housing’s electrolyte.
#11 LYTEN INC
Headquarters: San Jose, USA
Lyten is a materials science company pioneering 3D Graphene™ technology to develop advanced lithium-sulfur batteries, lightweight composites, and innovative sensors for various industries.
Key Patent in Solid State Battery
Metal-Air Battery Including Electrolyte Beads (US2021226225A1)
This electrochemical cell has two electrodes, three electrolyte volumes separated by two separators, and a lithium reservoir electrode contacting the third electrolyte volume.
#12 TERAWATT TECHNOLOGY INC.
Headquarters: Fremont, California, USA
TeraWatt Technology focuses on high-energy solid-state batteries aimed at revolutionizing EV and grid storage.
Key Patent in Solid State Battery
Anode-free solid-state battery capable of volume-expansion (KR20220009431A)
Several arrangements of anode-free solid state battery cells are provided herein. The variter cell may include a lithium ion buffer layer positioned between the solid state electrolyte and the anode current collector. Lithium ions can be stored in the lithium ion buffer layer when the battery cell is being charged, which can reduce the amount of swelling in the battery cell.
#13 HONDA MOTOR CO., LTD.
Headquarters: Tokyo, Japan
Honda is exploring solid-state batteries to enhance EV safety and performance in the automotive market.
Key Patent in Solid State Battery
Power storage device and its manufacturing method (JP2021150040A)
This power storage device has a negative electrode with an organic electrolyte, a positive electrode with an aqueous electrolyte, and a solid electrolyte in between, with sealing materials surrounding and sealing the negative electrode.
#14 TOYOTA MOTOR CORPORATION
Headquarters: Toyota City, Aichi, Japan
Toyota is a pioneer in solid-state battery technology, aiming for longer-range and fast-charging EV solutions.
Key Patent in Solid State Battery
Completely Solid-State Storage Battery And Method Of Its Manufacturing (RU2725177C1)
This solid-state battery includes multiple stacked multilayer packs with a single-pole structure, adhesive-fixed layers, and alternating collector, active substance, and solid electrolyte layers to prevent capacity reduction.
#15 CHINA FAW GROUP CO., LTD.
Headquarters: Changchun, Jilin, China
China FAW Group is developing solid-state batteries to improve its EV lineup’s performance and safety.
Key Patent in Solid State Battery
Preparation Method For All-Solid-State Battery, And All-Solid-State Battery (WO2022193777A1)
The present application provides a preparation method for an all-solid-state battery, and the all-solid-state battery. The preparation method comprises: after assembling an all-solid-state battery assembly, injecting a solid electrolyte solution, and drying to obtain the all-solid-state battery.
#16 JOHNSON IP HOLDING LLC
Headquarters: Milwaukee, Wisconsin, USA
Johnson IP Holding, part of Johnson Controls, holds patents focused on advancing solid-state battery technology.
Key Patent in Solid State Battery
High Temperature Lithium Air Battery (WO2020206082A1)
This lithium-air battery includes a lithium-based anode, an oxygen electrode, two chambers with conductive electrolytes, and a molten electrolyte isolated from air, connecting the lithium and oxygen ion electrolytes.
#17 STOREDOT LTD.
Headquarters: Herzliya, Israel
StoreDot is developing fast-charging solid-state batteries aimed at transforming the EV industry.
Key Patent in Solid State Battery
Multi-Electrolyte Battery (US2021336292A1)
This multi-electrolyte battery includes an anode, cathode, solid electrolyte, and multiple current carriers with external portions sealed to form a separate, sealed electrolyte compartment.
#18 SAMSUNG ELECTRONICS CO., LTD.
Headquarters: Suwon, Gyeonggi-do, South Korea
Samsung Electronics is advancing solid-state technology to power the next generation of consumer devices and EVs.
Key Patent in Solid State Battery
Anode-Solid Electrolyte Sub-Assembly For Solid-State Secondary Battery, Solid-State Secondary Battery Including Anode-Solid Electrolyte Sub-Assembly, And Method Of Preparing Anode-Solid Electrolyte Sub-Assembly (EP4343882A3)
This solid-state battery sub-assembly includes an anode current collector, a solid electrolyte with lithium storage rooms, an interlayer aligned with these rooms, and an insulation layer between the collector and solid electrolyte.
#19 NISSAN MOTOR CO., LTD.
Headquarters: Yokohama, Kanagawa, Japan
Nissan is investing in solid-state batteries to increase EV range and reduce charging time, aiming for market-leading efficiency.
Key Patent in Solid State Battery
All-Solid Battery And Manufacturing Method For All-Solid Battery (JP2022108509A)
This all-solid battery includes a power generation element with positive, solid electrolyte, and lithium-based negative layers, plus an elastic outer layer with lower Young’s modulus to minimize electrolyte damage during charging/discharging.
#20 LG ENERGY SOLUTION
Headquarters: Seoul, South Korea
LG Energy Solution is pioneering solid-state batteries, focusing on safer, higher-capacity energy storage for EVs and electronics.
Key Patent in Solid State Battery
Bipolar all solid state battery comprising a porous current collector (KR20220061439A)
The present invention relates to a bipolar all-solid-state battery including a porous current collector, and more particularly, to a bipolar all-solid-state battery in which two or more unit cells including a positive electrode, a solid electrolyte, and a porous current collector are connected in series.
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What’s Next?
The future of solid-state batteries is just beginning to unfold. With industry giants and startups racing to perfect this technology, the stakes have never been higher.
As research accelerates, we can expect groundbreaking developments in energy density, charging speeds, and safety. The convergence of solid-state batteries with electric vehicles, renewable energy, and portable tech promises to reshape our world. But keeping track of every innovation is a challenge, with a flood of patents, white papers, and industry news to sift through.
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