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Gravity Batteries, Green Hydrogen, and a Thorium Reactor for China

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2021 was a big year for energy-related news, what with the ongoing hunt for new forms of energy storage and cleaner if not carbon-free electricity and events and research that spotlighted the weak links in our power grid. IEEE Spectrum did its best to cover those developments, and these were the stories that our readers liked best.

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Australia Goes All-in on Green Hydrogen

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The carbon-free rigs will pack 50 kilos of hydrogen zapped from water using electricity from the refinery’s dedicated solar power plant. Ark’s first move was to access more renewable power in Australia by buying into a 923-MW wind farm that’s expected to spin up in 2024. In 2021, Ark Energy took a stake in.

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Can Flow Batteries Finally Beat Lithium?

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An example, she says, is the task of balancing energy flows in the power grid. There is only so much salt you can dissolve in a glass of water. Importantly, the nanofluids are engineered to remain suspended indefinitely, unlike other suspensions—for instance, sand in water.

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Practical Power Beaming Gets Real

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Although researchers revisit the idea of solar-power satellites with some regularity, those performing actual demonstrations of power beaming have struggled to surpass the high-water mark for efficiency, distance, and power level reached in 1975.

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