Sakuu hits new energy-density battery milestone, plans to begin shipping in 2023

Battery 3D printing specialist Sakuu Corporation has reached a new milestone in the development of its lithium metal battery, achieving a benchmark energy-density of 800 Wh/L.

According to the firm, the achievement is a significant step forwards on its roadmap to fully 3D printed solid-state batteries (SSB) capable of greater than 1,200 Wh/L by 2023, which would be far higher-performing than today’s market-leading lithium-ion batteries that function in the range of 500-700 Wh/L.

“The arrival of a safe, sustainable, and high-performance SSB, manufactured with a totally novel 3D printing method can solve critical supply chain and safety issues while moving beyond limitations of today’s lithium-ion batteries,” said Robert Bagheri, Founder and CEO of Sakuu. 

“We are on track to develop that ‘holy grail’ solid-state battery by 2023, and this first-generation benchmark is a validating accomplishment on the roadmap to significantly better batteries.”

Sakuu's SSB pouch cell. Photo via Sakuu Corporation.
Sakuu’s SSB pouch cell. Photo via Sakuu Corporation.

3D printing next-gen batteries

Backed by Musashi Seimitsu, Sakuu manufactures next-generation SSBs with the potential to power electric vehicles (EVs). The firm rebranded from KeraCel to Sakuu Corporation last year, and shortly afterward launched its Sakuu AM Platform, a multilateral system capable of combining binder jet and powder bed 3D printing technologies to process multiple ceramics and metals within the same part layer. 

With this capability, Sakuu says the printer can deliver storage devices with improved interfacing and stronger ceramic layers than existing batteries, while integrating monolithically-layered cells that can be more easily produced at scale. 

To further demonstrate the viability of its additive manufacturing technologies, the company has built a pilot battery 3D printing facility which is said to be able to initially produce up to 2.5 MWh of SSBs per anum before being expanded with a fleet of Sakuu AM Platforms this year. The systems will reportedly be able to produce up to 1 GWh of capacity each year. 

In October, Sakuu completed a follow-on financing round which took its total funding raised to $62 million. The funds were funneled into launching its first-gen SSBs alongside the future release of its second iteration battery 3D printer. 

Sakuu has achieved a benchmark energy-density of 800 Wh/L for its first generation lithium metal battery. Image via Sakuu Corporation.
Sakuu has achieved a benchmark energy-density of 800 Wh/L for its first generation lithium metal battery. Image via Sakuu Corporation.

A new energy-density milestone

Achieving 800 Wh/L energy-density in its first-generation non-printed lithium metal battery is a significant step forward for Sakuu in regards to its goal of fully 3D printing high-performance SSBs with improved energy storage. Notably, the firm claims its latest benchmark test is more promising than current leading commercially available batteries.

In addition to its 800 Wh/L achievement, the firm’s lithium-metal battery was also found to demonstrate high energy retention at 97 percent after 200 cycles. Once cycling is complete, the battery is expected to record 80 percent retention at 800 cycles.

The milestone is promising for the development of Sakuu’s second-generation fully 3D printed SSB, which is on track to begin being shipped in 2023. The company is anticipating another “substantial leap” in energy-density for its 3D printed battery, which is claimed to be the world’s first. 

With twice the energy-density and 30% less weight than existing lithium-ion cells, the firm’s second-gen batteries could be deployed within energy storage, microreactors, and electronics applications.

If the company’s roadmap continues on its current trajectory, it believes its 3D printing platform will offer rapid, mass-volume production of batteries in “gigafactory settings” that will meet global demand for the large-scale, low-cost manufacturing of batteries.

“We are creating a line of safe, customizable, low-cost and high-performance batteries, and manufacturing them in a completely transformative and sustainable manner to satisfy large-scale global demand,” said Bagheri.

The inside of the Sakuu AM Platform. Photo via Sakuu.
The inside of the Sakuu AM Platform. Photo via Sakuu.

Battery 3D printing

Sakuu Corporation isn’t the only firm leveraging additive manufacturing to develop more efficient, high-performance batteries. While battery 3D printing remains a fledgling technology, there have been some other noteworthy developments in this area over the past year or so.

In June 2021, for instance, Swiss mining and investment firm Blackstone Resources announced it was considering listing its Blackstone Technology division on the US stock exchange. The subsidiary says it is developing a 3D printing technology capable of producing high energy-density lithium-ion batteries and is preparing to enter serial cell production.

3D printer manufacturer Photocentric, meanwhile, has established a dedicated battery R&D division to design its own energy-efficient storage devices containing 3D printed electrodes. The firm reportedly hopes leverage its technology to develop economical fuel cells for Tesla’s upcoming Giga plant.

Elsewhere, the specialist 3D printing materials specialist 6K has opened a new $25 million facility dedicated to identifying sustainable energy storage alternatives in order to find the optimal source material for battery production.

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Featured image shows Sakuu’s SSB pouch cell. Photo via Sakuu Corporation.