US battery technology developer Microvast has advanced the development of its all-solid-state battery (ASSB) technology.

Microvast’s all-solid electrolyte separator membrane is based on a polyaramid separator, which is non-porous and tailored to solid-state applications. This ensures high ionic conductivity, structural stability and long-term durability, addressing a critical technical challenge in solid-state battery technology.

The advancement marks a step forward in improving safety, energy density and efficiency for applications such as data center backup power systems and electric school buses, while paving the way for future innovations in robotics and electric vehicles, according to the company.

Unlike conventional lithium-ion or semi-solid-state batteries, Microvast’s ASSB uses a bipolar stacking architecture that enables internal series connections within a single battery cell. This design reduces the number of interconnections between cells, modules and packs, simplifying the overall system architecture and enhancing energy efficiency as well as operational safety.

While traditional lithium-ion and semi-solid-state batteries, constrained by the limitations of liquid electrolytes, typically operate at nominal voltages of 3.2-3.7 V per cell, Microvast’s technology eliminates liquid electrolytes, allowing a single cell to achieve higher voltages based on specific application needs.

Microvast is advancing to the next phase, a pilot production study, in which its engineering team will aim to overcome manufacturing challenges.

“Our bipolar architecture, combined with our all-solid separator, not only simplifies battery design, but also enhances energy density and operational safety,” said Dr. Wenjuan Mattis, CTO of Microvast. “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.”

Source: Microvast