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Titanium emerges as a vanadium alternative for redox flow batteries
A Japanese-Chinese team developed a titanium molten salt redox-flow battery using abundant titanium ions and molten salt electrolytes to enable high-voltage, fast, and stable grid-scale energy storage. The system demonstrates high efficiency of over 97%, strong cycling stability, and improved cost and scalability compared to vanadium-based batteries, with further optimization underway.
Spain completes testing of Europe’s largest research vanadium BESS
Spain’s Fundación Ciudad de la Energía (Ciuden), a government energy research foundation, has completed operational testing of a 1 MW/8 MWh vanadium redox flow battery (VRFB) system at its Cubillos del Sil technology center, which it says is the largest vanadium flow battery in Europe dedicated to applied research.
New cost-saving copper welding technique for battery cells revealed by Fraunhofer
Resistance projection welding technique could unlock cost-effective copper interconnection potential. Described as a major opportunity for German battery manufacturers, the new approach to copper interconnections will now be used in commercial production.
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Using horizontally connected salt caverns for compressed air storage
Researchers in China have investigated the long-term stability of horizontally connected salt caverns used for compressed air energy storage. They found about 85% of the existing salt caverns in their home country are are suitable for this configuration.
World’s first high-power aluminum-ion battery system for energy storage
For the first time, a complete aluminum-graphite-dual-ion battery system has been built and tested, showing that lithium-free, high-power batteries can deliver stability, fast response, and recyclability for next-generation grid applications.
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Relectrify inverterless storage system fast tracked with $25 million ARENA backing
Victoria-headquartered battery technology company Relectrify has received $25 million ARENA backing to help deploy it’s CellSwitch inverterless technology, which promises to deliver 20% more energy over a battery system’s lifetime.
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Pilot project in German lab tests high voltage battery storage system at up to 20 kV
The KV-Batt research project aims to reduce battery system energy losses by operating at up to 20 times the usual voltage. A long-term practical test will take place after the development of high-voltage-resistant components.
Oct 16, 2025
High-rise buildings could soon use gravity energy storage, say researchers
Researchers in Canada have proposed using gravity-based energy storage in high-rise buildings, in combination with photovoltaic facades, small wind turbines, and lithium-ion batteries. Their modeling indicated that this hybrid system could achieve a levelized cost of energy ranging from $0.051/kWh to $0.111/kWh.
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