Energy Post

The best thinkers on energy

China: decades of support for innovation is now delivering results

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The evolution of China’s clean energy sector used to be based on a technology catch-up approach, which meant secondary innovation based on imported technologies. Daisy Chi at ECECP looks at the IEA’s recent report, “Tracking Clean Energy Innovation: Focus on China”, to conclude that the nation is now a major force in clean energy innovation. Decades of innovation-focussed policies, strong funding support, institutional reforms, big targets and … [Read more...]

Aluminium, sulphur and salt batteries. Cheaper than lithium-ion, for homes and EV charging stations

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The high and escalating demand for the lithium-ion batteries that dominate the market is driving the search for alternatives. Ideally, they will be made from inexpensive, abundant materials. David Chandler at MIT describes research there into a design that uses aluminium and sulphur as its two electrode materials, with a molten salt electrolyte in-between. The results point at batteries that have a projected cost per cell of about one-sixth that … [Read more...]

Gravity Batteries: any nation can do it at scale using rocks

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The beauty of gravity batteries is that they simply involve lifting (charging) and lowering (discharging) a heavy weight, explains Simon Read writing for the World Economic Forum. For pumped hydro, access to water and a geological height difference is needed. But if you’re using rocks or bricks, anyone can do it anywhere, and at any scale. The rest is just a construction job. No rare materials or minerals will ever be needed, nor chemicals that … [Read more...]

Record global clean energy spending, but it’s still not enough and costs are rising

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Since 2020, clean energy investment has grown by 12% per year – it was only 2%/year during the five years after the 2015 Paris Agreement. That boost is the main reason why total global energy investment is set to reach $2.4tn in 2022, according to the latest “World Energy Investment” report from the IEA. It’s very good news that spending on solar PV, batteries and EVs is now growing at rates consistent with reaching global net zero emissions by … [Read more...]

New thermophotovoltaic cells turn heat into electricity more efficiently than a steam turbine

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Over 90% of the world’s electricity comes from heat-generating power plants using coal, natural gas, nuclear energy, and concentrated solar energy. Steam turbines have always been the standard for converting that heat into electricity. On average they are only 35% efficient, with moving parts that cannot cope with temperatures above 2,000 degrees Celsius. Jennifer Chu at MIT describes new research, in collaboration with NREL, that has led to a … [Read more...]

Critical minerals: price spikes are affecting Wind, Solar, Batteries, EVs

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A wide range of critical minerals are needed for the energy transition. Tae-Yoon Kim at the IEA summarises the reasons why we should expect this to be a year of price spikes due in the main to the Russia-Ukraine war and post-lockdown supply chain bottlenecks. So severe is the problem that the long record of declining costs in clean energy technologies like solar, wind, batteries and electric vehicles is being reversed. Although these crises will … [Read more...]

Event Summary: “CHINA: Carbon Neutral by 2060 – Innovation”

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Here are the highlights of our 2-day 4-session workshop “CHINA: Carbon Neutral by 2060 - Innovation”, compiled by Sara Stefanini. It’s a quick and efficient way for readers to see the main points made by our expert panellists. Held at the end of May, it was the fourth of our EU-China workshops since the first was held in November 2020, produced for the EU China Energy Cooperation Platform (ECECP). As always, leading speakers from the EU, major … [Read more...]

Latest U.S. modelling shows Battery Storage can support an 80% Renewables grid by 2050

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NREL’s latest Storage Futures Study concludes that battery storage should be able to support an 80% renewables grid mix in the U.S. by 2050. Madeline Geocaris at NREL explains how they modelled hundreds of future scenarios to accurately represent the value of diurnal (<12 hours) battery energy storage. The high-storage scenarios made different cost and performance assumptions for storage, wind, solar PV, and natural gas. 15 storage … [Read more...]

Solar + Storage Hybrid plants are poised for explosive growth in the U.S.

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At the beginning of 2021 the U.S. had 73 solar and 16 wind hybrid projects, amounting to 2.5GW of generation and 0.45GW of storage. By the end of 2021, over a third of the 675GW of solar in the grid connection queue were hybrids, and 19GW were wind hybrids. Only one in four typically get approved, built and connected. But that still points at a twenty-five-fold increase in hybrid generation. It’s why Joachim Seel, Ben Paulos and Will Gorman at … [Read more...]

Bringing home Europe’s sustainability supply chain: The continent’s lithium deposits can transform European manufacturing and get Europe to its climate goals

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Europe’s tech sector has a concerning aversion. While the continent has produced many successful cleantech startups, European investors are reluctant to invest in difficult, hardware-based innovations—and the extraction industry that could power them. But it is just these innovations and the raw materials that make them possible, specifically in the sectors of transportation and energy storage, that will foster a successful energy transition and … [Read more...]

Using atomic-scale imaging and AI to reduce Battery degradation

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Finding ways to extend a battery’s life starts with understanding why they degrade. Andrew Myers writing for Stanford University describes research there that is using new methods of high-resolution X-ray, electron and neutron microscopy to allow direct visualisation of battery materials at the nanoscale. Degradation is mostly caused by the expansion and contraction of the materials. The high resolution images are processed using AI to uncover … [Read more...]

Critical minerals and materials: supply bottlenecks and risks need international cooperation

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The growth in demand for minerals and materials needed for the energy transition is putting a strain on supply. Mining and processing are the two key bottlenecks. Dolf Gielen, Martina Lyons, Francisco Boshell and Peter Chawah at IRENA summarise the multiple challenges. New capacity is not the only problem: the geographical concentration of where the mining and, in particular, the processing is being done is the primary risk. China’s dominance in … [Read more...]

Lifting and lowering tons of bricks: the best storage solution for Wind and Solar intermittency?

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It’s a high capacity storage system that’s simplicity itself. Use excess wind and solar to raise heavy weights. Keep them at a height for as long as you like. Lower them to generate electricity. James Conca looks at a system being developed by Energy Vault and already being demonstrated in the Swiss national grid. At scale, a single “vault” with 10,000 bricks will have an annual output of 27 GWh, sitting on only 14 acres of land. The bricks are … [Read more...]

Grid-scale modelling of Distributed Energy Resources and dynamic pricing for all customers

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Smart grids can solve multiple problems now and throughout the lifetime of the energy transition. The supply from hundreds (existing + new wind, solar, etc.) and ultimately millions (rooftop solar, EV batteries) of power sources can be matched in real time with demand from all major customer devices (air conditioners, water heaters, batteries, EVs). Dynamic pricing keeps the peaks low and the troughs high. It takes the pressure off total load, … [Read more...]

Research into slowing lithium degradation can extend Battery life by 30%

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The massive scale-up of batteries is essential to a successful transition. That will be made much easier if the lifetime of existing lithium batteries is greatly extended. With each charge-discharge cycle, the batteries accumulate tiny islands of inactive lithium that are cut off from the electrodes, decreasing the battery’s capacity to store charge. Jennifer Huber at the SLAC National Accelerator Laboratory explains how new research is showing a … [Read more...]