Additive manufacturing project advances nuclear battery for space and defense
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An Australian led additive manufacturing initiative is working to transform how long duration space and defence missions are powered, addressing the challenge of reliable maintenance free energy in extreme environments.
The Additive Manufacturing Cooperative Research Centre is supporting South Australian nuclear engineering company entX as it advances its GenX Betavoltaic Power Generator from prototype to pre commercial production. Developed with Adelaide University, GenX combines additive manufacturing and advanced surface engineering to create a compact next generation nuclear battery.
Valued at 1.8 million dollars, the 14 month project will validate both the device and its production process for customer evaluation, helping bridge the gap between laboratory demonstration and scalable manufacturing.
Engineering higher power density
GenX integrates additive manufacturing with advanced coating and thin film deposition, building nanoscale layers of metal metal oxide and semiconductor materials into complex architectures. The resulting ultra thin betavoltaic films are designed to exceed current global benchmarks in power density.
Betavoltaic devices generate electricity from radioactive decay, enabling long life operation without refuelling or regular maintenance. entX says re engineered ultra thin designs unlock power densities previously unattainable, expanding mission possibilities for spacecraft subsea systems and remote defence platforms.
Researchers at Adelaide University describe the platform as a step change achieved by combining semiconductor deposition, additive manufacturing and surface engineering techniques.
Applications and commercial pathway
The system targets environments where solar access refuelling or maintenance is impractical, including deep space missions unmanned underwater vehicles and remote defence installations. The program will scale physical vapour deposition to improve electrical junction efficiency and prototype radiation shield encasements for safe integration.
If successful, the project aims to deliver a high power betavoltaic demonstrator and position Australia at the forefront of advanced betavoltaic manufacturing. The validation phase will determine whether GenX can move from prototype to deployable power system in global aerospace and defence markets.
Strategic positioning in a competitive global market
The project also unfolds against a backdrop of intensifying global competition to secure resilient, sovereign energy technologies for critical missions. Space agencies and defence departments in the United States, Europe and Asia have renewed their focus on nuclear-based micro power systems as satellite constellations expand and deep space ambitions accelerate. Traditional radioisotope thermoelectric generators have powered landmark missions, yet their size, cost and thermal output limit broader deployment. By contrast, betavoltaic systems promise a far smaller footprint, converting beta decay directly into electricity without the need for bulky heat conversion systems. If entX can demonstrate consistent, high-yield performance at scale, Australia could emerge as a specialist supplier within allied aerospace supply chains, particularly for applications where compact form factor and multi-decade endurance outweigh peak power output.
Scaling manufacturing from prototype to production
Beyond performance metrics, manufacturability will be decisive. Additive manufacturing offers not only geometric flexibility but also the prospect of digital repeatability, enabling complex internal structures that optimise surface area and radiation interaction while reducing material waste. Coupled with advanced thin film deposition, the approach may lower barriers to customisation for mission-specific requirements, whether in low Earth orbit satellites, lunar infrastructure or autonomous subsea sensors monitoring strategic waterways. Regulatory pathways, including radiation handling, transport and end-of-life management, will shape commercial timelines, yet early engagement with defence primes and space integrators suggests a defined route to market. As governments prioritise energy security and technological sovereignty, platforms such as GenX illustrate how advanced manufacturing can intersect with nuclear science to redefine what reliable, maintenance-free power looks like in the harshest operating environments.
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