NASA Develops Extreme Solid-State Batteries for Harsh Lunar Missions
New SPEARS technology withstands lunar temperature swings to power rovers and habitats.
1Lunar Power Challenges
Humanity's return to the Moon through the Artemis campaign faces massive energy storage challenges at the South Pole. Nighttime temperatures drop to minus 328 Fahrenheit, while daytime heat reaches 212 Fahrenheit. NASA is developing specialized energy storage solutions to reliably power rovers, astronaut emergency kits, and long-duration habitats.
2Liquid Electrolyte Vulnerabilities
Standard commercial lithium-ion batteries fail in space because they rely entirely on liquid electrolytes. Extreme lunar cold freezes this liquid, while daytime heat prevents operation until cooled. Vacuum exposure causes volatile electrolytes to evaporate rapidly, creating severe mission reliability issues and potential thermal safety hazards during lunar surface operations.
3The SPEARS Architecture
NASA’s Solid Power for Extreme Environment Adaptability and Resilience in Space project replaces liquid chemistry with solid ceramic or polymer-based materials. Led by Donald Dornbusch at Glenn Research Center, the initiative designs resilient cells that survive deep thermal swings without suffering mechanical degradation or posing fire hazards in vacuum.
4Thermal Vacuum Test Results
During testing at Langley Research Center, prototype cells operated effectively between 176 Fahrenheit and minus 76 Fahrenheit. Performance continued down to minus 112 Fahrenheit, marking the first verified operation at minus 80 Celsius. The cells sustained no physical damage across exposure ranges spanning 212 Fahrenheit to minus 274 Fahrenheit.
5Eliminating Heavy Insulation
While solid-state cells do not discharge at minus 274 Fahrenheit, solid electrolytes do not freeze permanently. Small auxiliary heaters quickly warm dormant batteries back to operational thresholds. This approach eliminates the requirement for heavy, continuous thermal management systems, substantially reducing spacecraft weight and extending overall mission lifespans on lunar terrain.
6Tunable Battery Chemistry
According to research lead Yi Lin, solid-state architecture allows engineers to tune electrode materials for distinct operational requirements. Battery configurations can be optimized specifically for higher energy density, maximum peak power, or extended thermal durability depending on whether they power handheld tools, mobile rovers, or stationary science equipment.
7Multi-Center Mission Collaboration
Initiated in 2026 under the Space Technology Mission Directorate, SPEARS leverages expertise across multiple facilities. While Glenn leads project management and Langley directs materials testing, Ames Research Center develops flight-ready hardware and custom testing boards to prepare these prototype solid-state cells for upcoming orbital and surface flight demonstrations.
8Commercial Terrestrial Potential
Originating from aeronautic battery research, SPEARS technology offers substantial commercial crossover potential beyond space exploration. Materials scientist Ji Su notes that automotive, mobile telecommunications, and drone industries require resilient portable power. NASA plans initial technology maturation before transitioning these solid-state innovations toward commercial manufacturing and industrial partnerships.
Original article: NASA — NASA Develops Extreme Solid-State Batteries for Harsh Lunar Missions