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TDK’s New Solid-State Battery Boasts Unprecedented Energy Density

The rechargeable ceramic solid-state battery for consumer electronics packs capacity 100 times greater than TDK’s existing CeraCharge SSBs.

Michael C. Anderson, Editor-in-Chief, Battery Technology

June 17, 2024

3 Min Read
TDK material for a new solid-state battery
TDK material for a new solid-state battery.TDK

Japan-based TDK Corp. has unveiled a next-generation solid-state battery featuring a remarkable energy density of 1,000 Wh/L. This energy capacity is approximately 100 times greater than that of TDK’s existing mass-produced CeraCharge solid-state batteries, positioning the company at the forefront of battery innovation. The new design is expected to be a solution that can be used in various wearable devices, such as wireless earphones, hearing aids and even smartwatches, with the goal of replacing existing coin cell batteries.

The battery can be applied for replacing coin cell primary batteries in compliance with EU battery regulations, which require them to be replaced by rechargeable batteries. These regulations aim to reduce environmental impact and promote sustainability. TDK’s solid-state battery technology aligns perfectly with these new standards, offering a powerful, rechargeable alternative to conventional coin cell batteries.

Technological advancements and industry impact

TDK’s latest battery leverages proprietary material technology, including an all-ceramic structure with an oxide-based solid electrolyte and lithium alloy anodes. This composition not only enhances energy density but also significantly improves safety, making the battery suitable for devices that come into direct contact with the human body.

TDK’s competitors have developed small solid-state batteries with energy densities of around 50 Wh/L, while traditional liquid electrolyte rechargeable coin batteries offer about 400 Wh/L. TDK’s advancement to 1,000 Wh/L is a significant leap forward.

The Financial Times reports TDK’s Chief Executive Noboru Saito as saying, “We believe that our newly developed material for solid-state batteries can make a significant contribution to the energy transformation of society. We will continue the development towards early commercialization.”

Applications and future directions

The new battery is poised to have a significant impact on the wearable tech industry. Its high energy density and compact size will enable manufacturers to design smaller, more efficient devices with longer battery life. Environmental sensors and other compact electronics will also benefit from this advancement, enabling more robust and reliable performance.

While the potential of solid-state batteries is vast—offering safety, lighter weight, and longer performance—the path to mass production, especially for larger battery sizes, presents significant technical challenges. The ceramic material used in TDK’s battery, while highly stable, is more fragile in larger formats, complicating its application in vehicles and smartphones.

TDK plans to start shipping samples of its new battery prototype to clients next year, with hopes of moving into mass production soon after. As the industry adapts to new regulations and the demand for more efficient, sustainable energy solutions grows, TDK’s innovation is set to play a crucial role in the future of personal electronics.

From cassette tapes to SSBs

Founded in 1935, TDK Corp. has a long history of innovation in magnetic materials and electronic components. The company gained household recognition as a leading cassette tape brand in the 1960s and 1970s. TDK’s extensive experience in battery materials and technology has solidified its position as a global leader, holding a 50 to 60 percent market share in small-capacity batteries for smartphones. The company now aims to lead in the medium-capacity market, which includes energy storage devices and larger electronics such as drones.

About the Author(s)

Michael C. Anderson

Editor-in-Chief, Battery Technology, Informa Markets - Engineering

Battery Technology Editor-in-Chief Michael C. Anderson has been covering manufacturing and transportation technology developments for more than a quarter-century, with editor roles at Manufacturing Engineering, Cutting Tool Engineering, Automotive Design & Production, and Smart Manufacturing. Before all of that, he taught English and literature at colleges in Japan and Michigan.

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