Technology and R&D

US researchers have proposed the use of hydraulically fractured oil and gas wells to store renewable energy via compressed natural gas, with the levelized cost of storage potentially coming in at $70/MWh and $270/MWh. They said wells could also be used to store other renewable gases such as carbon dioxide or hydrogen in the future.

Researchers have developed a PV module with with an efficiency of 20.72%, based on tin oxide (SnO2) as an electron transport layer,  an organometal halide perovskite layer, organic halide salt phenethylammonium iodide (PEAI) as a passivation agent, and Spiro-OMeTAD as the hole transport layer (HTL).

A group of international scientists has investigated the potential use of radiative cooling in PV systems, in a newly published review focusing on challenges and opportunities for the passive cooling technology.

A startup incubated at the Indian Institute of Technology Kanpur has introduced ZincGel battery tech, which could offer significant savings for owners of two-wheel electric vehicles.

While Europe was previously a leader in the manufacturing of solar cells and modules, the plans falling into place this year already represent a scale never before seen on the continent. And they’ll need that scale if Europe is to meet expected demand for new solar over the coming decades, without relying heavily on imported products and components. Many of the technologies at the center of these plans are brand new as well; pv magazine looks at a few of the innovators planning to scale up alongside more mainstream players, and how these fit into plans for a fully fledged European PV supply chain.

Bosch’s new solid oxide fuel cell prototype has an electrical efficiency of more than 60% and an overall efficiency above 85%. It also has a targeted power output of 10 kW and can produce up to 3 kW of thermal energy.

Scientists in Canada fabricated a perovskite solar cell based on an inverted structure that achieved 23.9% efficiency, and maintained 92% of its initial performance after 500 hours of accelerated aging tests. By carefully controlling the thickness of the perovskite layer, the group was also able to gain control of “quantum mechanics” properties such as the movement of electrons within the layer and the wavelengths of light absorbed.

Scientists in Spain have developed a new heat pump that can produce 6.49 kWh of heat for each kilowatt-hour of power it consumes. The device could generate hot water at a temperature of up to 75 C.

Swiss Clean Battery is set to start commercial production of its pure solid state batteries in Switzerland. The batteries are based on a protected electrolyte made of a solid ion conductor, which helps to maintain internal resistance and capacity. The fixed ion conductor is formed in the battery cell itself, similar to a multi-component adhesive.

India’s Next Automation has developed a tractor-mounted hydraulically operated arm as a cleaning solution for panels in solar farms.