Microvast reveals all-solid-state battery tech with operational voltage of 12-21 V

Microvast says its new True all-solid-state battery (ASSB) eliminates liquid electrolytes to achieve voltages of 12 V to 21 V, with a bipolar stacking design that cuts interconnections between cells, modules, and packs.
<i>Image: Microvast</i>

Microvast Holdings, a Texas-based battery maker, said it has developed an all-solid-state battery that overcomes a key barrier to broader adoption: maintaining stable high-voltage operation without sacrificing safety or long-term reliability.

“Traditional lithium-ion and semi-solid-state batteries, constrained by the limitations of liquid electrolytes, typically operate at nominal voltages of 3.2 V to 3.7 V per cell,” the company said in a statement. “In contrast, Microvast’s technology completely eliminates liquid electrolytes.”

The company said its ASSB operates at voltages between 12 V and 21 V. Its bipolar stacking design allows single cells to reach higher voltages without the decomposition that would occur with liquid electrolytes in similar systems.

The battery uses a proprietary all-solid electrolyte separator membrane with a non-porous polyaramid separator, which the company says ensures “excellent” ionic conductivity, structural stability, and long-term durability. The precise layer alignment of the cathode, anode, and solid electrolyte reportedly enhances current distribution and mechanical stability.

“Our bipolar architecture, combined with our proprietary all-solid separator, not only simplifies battery design, but also enhances energy density and operational safety,” said Microvast CTO Wenjuan Mattis. “Further, the absence of liquid electrolytes ensures our batteries can operate at voltages unattainable by conventional designs, underscoring the transformative potential of our technology. This flexibility in cell design empowers us to address emerging applications in fields such as advanced robotics and compact energy systems.”

Microvast now plans to conduct a pilot production study.

“This phase represents a bold step into a new technological frontier, where our engineering team will apply innovative approaches to overcome unique manufacturing challenges,” the company said, without providing further details.

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  • Emiliano is responsible for the daily news coverage on pv-magazine.com with a particular focus on European market. Emiliano also covers new technology, R&D, installations and company financial reporting. In its previous experience as a journalist, Emiliano has written about EdTech and new language technologies.

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