NASA Develops Solid-State Batteries for Lunar Use

The SPEARS project creates power systems built to withstand the Moon's extreme temperature fluctuations.

Updated on Oct. 22, 2026 in Materials Science

A brushed-metal solid-state battery component resting on a clean laboratory workbench, highlighting space-grade engineering components. — NASA researchers have successfully tested solid-state batteries designed for the Moon's South Pole, where extreme temperatures threaten standard liquid-electrolyte power systems. AI Illustration. Upload story photo >

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NASA researchers have developed new solid-state batteries designed specifically to operate in the harsh environment of the Moon's South Pole. Since the project began in 2026, engineers have successfully tested prototypes capable of functioning across wide thermal extremes.

Why it matters

Standard liquid-electrolyte batteries are prone to freezing or failing in the extreme cold of lunar nights, which can reach -200 degrees Celsius. This solid-state design reduces the need for heavy, complex thermal management systems in future spacecraft and habitats.

Prototype cells functioned at temperatures ranging from 80 degrees Celsius down to -80 degrees Celsius during testing. These units successfully survived exposure to temperature extremes between 100 degrees Celsius and -170 degrees Celsius without damage.

The players

NASA

The United States government agency responsible for the nation's civilian space program and aeronautics research.

Langley Research Center

A NASA field center located in Hampton, Virginia, that serves as a primary site for aeronautics and space technology testing.

The details

The design replaces traditional liquid electrolytes with solid ceramic or polymer-based materials to prevent freezing and evaporation in space. Researchers at NASA's Langley Research Center utilized small internal heaters to maintain operational temperatures following exposure to extreme cold.

The SPEARS project was launched in 2026.

The Big Picture

This development marks a shift from liquid-based chemical energy storage to solid-state alternatives within the SPEARS project. It represents a paradigm shift in space power, moving away from fragile liquid systems that require heavy insulation toward robust materials capable of withstanding lunar environments.

This breakthrough could lead to more compact, lightweight power systems for future consumer electronics that must operate in extreme terrestrial climates. Successful implementation of solid-state technology in space may also accelerate the development of safer, higher-density battery packs for electric vehicles on Earth.

The takeaway

Solid-state batteries offer a durable alternative to liquid systems by eliminating the risk of electrolyte freezing in low-temperature environments. Readers can watch for future commercial collaborations that might eventually bring these high-temperature tolerant power designs into the consumer market.