Scientists in the U.S. demonstrated a sodium-ion battery with no anode, that retained 99.93% of its initial capacity per cycle. Their design was able to overcome many of the stability issues associated with using ‘pure’ alkali metals in batteries, thanks to carefully minimizing water content in the liquid electrolyte.
A Danish consortium is seeking to store electricity from large scale renewable energy plants in the form of thermal energy in big tanks containing crushed, pea-sized stones made of basalt. The first 10 MWh demonstrator is planned to be developed in Denmark and to be powered by a wind facility. Another project is also under development in the United States and is planned to be linked to a solar plant.
European scientists are designing a new type of redox flow storage system aimed at flexibly balancing power grids in the event of critical conditions. Funded by the EU, the research project is being coordinated by the Landshut University of Applied Sciences and runs until 2023.
The country added around 90 MW/100 MWh of new, small-sized storage capacity over the past 18 months. Most of the batteries are in Lombardy, whose administration offers rebates.
There’s no understating the importance of maintaining a safe battery system, and that maintenance will become only more important as battery adoption grows exponentially in the coming years. Fortunately, new standards are being developed alongside existing protocols to make safety management uniform and manageable.
Big batteries derive most their value from replacing gas peaker plants and averting the installation of excessive amounts of transmission and generation infrastructure. However, batteries cannot replace all gas plants, MIT researchers found. From a holistic economics perspective, there is a certain share of storage that is considered cost-efficient. With battery costs declining, that share is constantly increasing.
Scientists in the U.S. claim to have demonstrated an inexpensive, long-life, safe and eco-friendly redox flow battery. The device is said offer coulombic efficiency of 97.9% thanks to functional electrolyte additives, pH and elevated temperature.
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