State authorities have unveiled ambitious plans to construct Australia's first-ever compressed carbon dioxide (CO2) battery storage system in Hazelwood, a move poised to transform Gippsland's energy landscape. This pioneering project, slated for development near the former Hazelwood power station, represents a significant stride towards a more sustainable and resilient energy future for the region.

The innovative 20-megawatt closed-loop CO2 battery system, part of a sprawling 143-hectare renewable energy hub, is designed to efficiently store surplus renewable energy generated during the day for crucial use during peak demand periods or overnight. Officials highlight that this technology offers three times the energy storage capacity of conventional large-scale lithium-ion batteries, providing a robust solution for grid stability.

Boosting Local Economy and Energy Reliability

The announcement signals a considerable boost for the local economy, with the project expected to create 66 new jobs during its construction phase. This initiative is a component of a broader $4.6 billion investment strategy aimed at fostering employment and driving economic growth across the Latrobe-Gippsland region, emphasizing the state's commitment to transitioning away from traditional energy sources.

Energy Minister Lily D'Ambrosio underscored the importance of the project, stating, "This is a very important next step in the build-out of the technologies that the State Electricity Commission (SEC) is renowned for, and will deliver on behalf of the Victorian people, especially here in the Gippsland region near Morwell." The SEC, a government-owned renewable energy company, is spearheading the development, reinforcing its mission to lead the state's clean energy transition. "We know that we're going to need, in Victoria, more long-duration storage technologies to support the transition to 95 per cent renewable electricity by 2035," the Minister added, highlighting the battery's crucial role in achieving these ambitious targets and ultimately reducing power prices for consumers.

How the CO2 Battery Works

Explaining the technical marvel behind the system, Lane Crockett, acting executive head of assets for the SEC, detailed the battery's operation. "The battery will take carbon dioxide at low pressure and compress it into liquid form," Crockett explained. "Then that energy is basically stored as a liquid, and it can be expanded when you need the energy." A key advantage of using CO2, according to Crockett, is its inherent safety profile. "The beauty of carbon dioxide as a gas is it's nonflammable, it's non-toxic, and the gas is such that you are able to store it without having to make it colder to make it into a liquid."

The CO2 required for the battery's operation will be supplied by Gippsland's Longford gas plant. Remarkably, this reserve of carbon dioxide will only need a single fill for the entire 30-year operational life of the battery, minimizing ongoing resource requirements. The project is anticipated to involve a mix of offshore and domestic construction expertise.

Future Outlook

While a definitive construction timeline is yet to be revealed, officials indicate that consultation work with stakeholders and the community will take place in the coming years. This ground-breaking CO2 battery is set to be the first of several projects planned for the eastern Victorian site, further solidifying Gippsland's role as a powerhouse in the state's renewable energy future.