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Technology

Concrete battery for applications in buildings, rooftop PV

A prototype of a cement-based battery has been developed in Sweden for potential applications in buildings. Its creators claim it could become a solution to store electricity from rooftop PV and they do not exclude that it could also be used for the storage of large-scale renewables.

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Solar-plus-storage to produce hydrogen from seawater

Spanish PV project developer Gransolar is planning to build a large-scale green hydrogen production plant in the Port of Almería, in southern Spain.

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Micro III-V solar cell with 33.8% efficiency

Developed by a French-Canadian research group, the triple-junction cell is based on indium gallium phosphide (InGaP), indium gallium arsenide (InGaAs) and germanium (Ge) and has an active area of only 0.089 mm2. It can be used for applications in micro-concentrator photovoltaics (CPV).

Compressed air tech for solar module cleaning, cooling shows promise in India field-testing

British scientists have reported significant restoration of the panel performance with the experimental compressed air system developed by them for the simultaneous cleaning and cooling of PV modules. The system was built with a compressed-air unit which was made of a compressor, an air tank, and an airflow regulation valve, and a series of nozzles. The technique was tested on a PV system located in northwestern India.

Harvard scientists unveil solid-state lithium battery that can be charged and discharged at least 10,000 times

US scientists have created a new design for lithium-metal, solid-state batteries that should avoid the formation of dendrites that grow into the electrolyte. Their multilayered battery could potentially recharge electric vehicles within 10 to 20 minutes.

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‘Hydrogen as a universal climate solution might be a bit of false promise’

Hydrogen and hydrogen-based fuels will not be able to move forward fast enough to replace fossil fuels and tackle climate change, according to a German-Swiss research team that claims direct electrification alternatives are cheaper and easier to implement. The scientists cite too-high prices, short-term scarcity and long-term uncertainty, as the main reasons for their skepticism.

Tesla shifts battery chem for its Megapack energy storage system

The US electric car manufacturer is reportedly shifting to cobalt-free lithium iron phosphate (LFP) batteries for its utility-scale battery.

Recycling rare-earth elements from dead lithium batteries

American Resources Corporation is developing a process to separate pure rare earth metals from lithium-ion batteries used in electric vehicles or power plants based on renewable energy. The technique is described as a two-zone ligand-assisted displacement chromatography (LAD) that is able to produce metals with high yields and purity of over 99%.

Indian firm designs solar sculpture to produce 300 MWh of electricity annually

Called Solar Mountain, the permanent installation should be built in Nevada with modular design elements of recycled wood and other environmentally friendly materials.

Lithium saturation to make old batteries new

Scientists investigating the aging mechanisms affecting today’s lithium-ion batteries observed that the loss of lithium over time is one of the main causes of performance loss. With this in mind, they developed and tested a “relithiation” process that promises to eliminate much of the cost and complexity from recycling battery components and materials.

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