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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 EnergÃa (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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Australian researchers achieve zinc-ion battery life breakthrough
Australian researchers are reporting a breakthrough with zinc-ion battery technology, developing a new method to significantly boost the structural stability of the cathode material that enables the battery to operate reliably for more than 5,000 charge-discharge cycles.
Comparing thermal runaway behavior of sodium-ion, lithium-ion batteries
Scientists in Germany have analyzed the thermal runaway behavior of sodium-ion batteries and lithium-ion batteries inside a 10-L reaction vessel. They have thermally abused 30 samples, each under a different state of charge level, and have found that both types suffered from runaway when the charge is at least 50%.
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Optimizing Carnot batteries for renewables storage
Based on the the heat pump-organic rankine cycle, scientists in Portugal have created six different models of Carnot batteries for stationary storage. They investigated 16 different combinations of working fluids and created a multi-objective optimization for the best candidate.
Scientists in UK build solar redox flow battery with 9.54% solar-to-chemical efficiency
The PV-driven redox flow battery can reportedly achieve a maximum solar-to-output electricity efficiency (SOEE) of 3.11% during a 36-hour period. The system incorporates a 25 sq cm heterojunction (HJT) photovoltaic device and is based on a neutral-pH aqueous iodine-bromine redox couple.
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