Solid-state battery: are we entering in a new era?

Extracted from: Solid-State battery report, Yole Développement – Release date: June 2018


  • A feasible way towards safer, better-performing batteries?
  • Why is solid-state battery development accelerating?
  • Who makes what in solid-state battery technology development?

LYON, France – June 28, 2018: Last week, Volkswagen announced its partnership with QuantumScape. This announcement confirms the growing interest of EV/HEV makers in solid-state battery technology. Is the solid-state battery entering in a new era? Not now for sure but probably by 2022, announces Yole Développement (Yole) in its latest Solid-State Battery report. According to its aggressive market forecast scenario, mass production of solid-state batteries will begin by 2022…
Today, there is no commercially-available bulk solid-state battery (1). Over the last several years, numerous different players have made announcements regarding the readiness of prototype cells and expected commercialization starts, only to see these ultimately be cancelled or postponed. And despite decades of development, many technology challenges remain unsolved.
Why is there a strong, growing interest in solid-state battery development and commercialization? What are the key drivers? Yole offers you today to discover the technical challenges and market issues related to the solid-state batteries.

First research activities in solid-state battery technology date to the late 1950s. Solid-state battery technology has found applications in the form of microbatteries as a micro-power source for sensors, etc. Unfortunately, materials and manufacturing methods used for microbattery’s fabrication are extremely difficult to translate into bulk-size battery manufacture on a cost-effective basis.
According to Yole’s analysis, the current momentum for growing interest in solid-state batteries is the strong application-pull of game-changing battery industry players: the EV/HEV makers. Indeed, established automotive players including Toyota, Volkswagen, BMW, etc. and newcomers such as Dyson, Fisker, plan to commercialize EV/HEV with a battery that will be safer, lighter, and longer-running than conventional Li-ion battery.
A growing number of players involved in solid-state battery development is another reason for increased momentum, as is a variety of newly established solid-state battery consortiums.
Numerous industry players and R&D players from different areas are combining their efforts, each bringing a piece of technology knowhow. As an example, 23 companies take part in the Japanese Libtec consortium.
“Sharing know-how from the four main technology areas is crucial for bringing solid-state battery to commercialization,” explains Dr. Milan Rosina, Senior Analyst, Power Electronics & Batteries, within the Power & Wireless division at Yole. These areas include: Solid-state electrolyte technology – Equipment – Battery cell – Automotive.
In addition, large coverage of multiple topics by different players is important for solid-state battery, enabling accelerated evaluation of different technology approaches and concentration on the most promising ones.

Regarding solid-state battery technology development, there are many technology bricks involved, including electrolyte material screening, ionic conductivity enhancement, electrolyte/electrode interface stability, lithium metal anode, separator coating, cell and pack manufacturing methods, BMS , and battery pack design. Yole’s analysts identified more than 100 companies and R&D players involved in solid-state battery development.
“For an emerging technology, it might be surprising to see that only 14 of 68 industrial companies identified are startup companies”, comments Dr. Rosina. “These start-ups, including Ionic Materials, NEI Corporation, QuantumScape, are positioned mainly in electrolyte material screening and development.”
Actually, R&D activities are rapidly developing within 54 big companies. These companies are mainly car makers including Toyota, BMW, Volkswagen, Renault-Nissan-Mitsubishi Alliance, and Hyundai.
Toyota, with a strong solid-state development history and 200+ engineers working on solid-state battery technology, is considered a leader here.
Strong participation from EV/HEV makers is extremely important for solid-state battery commercialization. Besides huge market potential, they bring to solid state battery development know-how regarding EV/ HEV battery requirements, battery pack assembly, testing, and qualification. And in fact, the simplification of battery pack design and its components will improve solid-state battery’s cost-competitiveness compared to conventional Li-ion batteries.
Other players include conventional Li-ion battery cell manufacturers (i.e. Samsung SDI, LG Chem, A123 Systems), battery separator technology solutions suppliers (Asahi Kasei), and materials suppliers (Solvay, Umicore, etc.).

The market research and strategy consulting company, Yole releases today its Solid-State Battery report. This new analysis offers deep insight into the key drivers and value proposition of solid-state battery technologies, compared to conventional Li-ion batteries. It also proposes a comprehensive analysis of the remaining challenges to bringing solid-state battery to commercialization. Main applications and different approaches for solid-state battery commercialization are well detailed in the report as well as an overview of the different materials and manufacturing methods.

A full description of this report is available on, Batteries & Energy Management reports section.

(1) Not including the polymer based solid-state batteries from Bolloré Group, which must be heated to 60 - 80°C.

EV/HEV : Electric Vehicle/Hybrid Electric Vehicle
BMS : Battery Management System

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