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Energy Dome: Energy Storage with Innovative CO2 Technology for a Sustainable Future

Written by Karol Kaczmarek
Published June 4th, 2024
13 min read
Updated July 13th, 2024


Energy Dome is transforming the energy storage landscape with its innovative CO2 Battery technology. By providing efficient and cost-effective long-duration energy storage, the company plays a pivotal role in supporting renewable energy integration and reducing carbon emissions. Discover how Energy Dome's unique approach and commitment to sustainability are driving the future of clean energy.
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Energy Dome
Date of establishment

Deep dive

Energy Dome is a pioneering company in the field of energy storage, specializing in long-duration electricity storage solutions using liquid CO2. Based in Italy, Energy Dome was founded in 2019 and has quickly made a name for itself in the renewable energy sector. The company's mission is to revolutionize energy storage by providing a cost-effective and highly efficient solution, enabling greater integration of renewable energy sources and contributing to a more sustainable and carbon-neutral future.

Did you know that Energy Dome's innovative CO2 Battery can store energy for over 10 hours at a fraction of the cost of traditional battery storage systems? This breakthrough technology addresses one of the most significant challenges in renewable energy, ensuring a stable and reliable power supply even when the sun isn't shining or the wind isn't blowing.

Source: energydome

Company Background


Energy Dome was founded in 2019 with the vision of creating a cost-effective and efficient energy storage solution using liquid CO2. Since its inception, the company has achieved significant milestones, including the successful development of its CO2 Battery technology and the establishment of pilot projects to demonstrate its effectiveness. Key phases in the company's growth include the completion of their first operational prototype and securing strategic partnerships with renewable energy providers.

Founders and Key Figures

Energy Dome was co-founded by CEO Claudio Spadacini, a seasoned engineer with extensive experience in energy and industrial innovation. Under his leadership, the company has attracted a team of experts in energy storage, engineering, and sustainable technologies, positioning Energy Dome as a leader in long-duration energy storage solutions.

Funding and Investors

Energy Dome has attracted substantial investment to support its growth and development in the cutting-edge field of energy storage. Since its inception, the company has completed several successful funding rounds, drawing interest from notable investors dedicated to clean technology and sustainable energy solutions. Among these investors, 360 Capital stands out as a key supporter, along with other prominent venture capital firms that recognize the transformative potential of Energy Dome's innovative technology.

In recent funding rounds, Energy Dome has secured significant capital to scale up its operations and expand its market reach. This influx of investment is not only a testament to the company’s technological advancements but also an indicator of strong investor confidence in its business model and future prospects. The funds raised are being strategically allocated to enhance research and development, increase production capacity, and explore new markets where long-duration energy storage solutions are critically needed.

Investor confidence in Energy Dome is further reinforced by the company's consistent performance and strategic vision. The successful implementation of pilot projects, such as the one in Sardinia, Italy, has showcased the practical viability and efficiency of their Carbon Dioxide Energy Storage System. These achievements have solidified Energy Dome's reputation as a leader in the renewable energy sector, encouraging continued financial support from both existing and new investors. With robust financial backing, Energy Dome is well-positioned to drive innovation and contribute significantly to the global transition towards sustainable energy.

Products and Services

Core Products/Services:

CO2 Battery: Energy Dome's primary product is the CO2 Battery, a cutting-edge energy storage system designed to store electricity using liquid CO2. This system plays a crucial role in stabilizing power grids that rely on intermittent renewable energy sources like solar and wind. By efficiently storing excess energy during periods of high production and releasing it when production is low, the CO2 Battery ensures a consistent and reliable power supply.

Contribution to Carbon Reduction and Sustainability: The CO2 Battery significantly contributes to carbon reduction by facilitating the broader adoption of renewable energy. It enables a more reliable and efficient integration of solar and wind energy into the power grid, reducing the dependency on fossil fuels and lowering greenhouse gas emissions. Additionally, the use of CO2, an abundant and inexpensive resource, makes this technology not only sustainable but also economically viable. Energy Dome’s innovative approach helps mitigate the environmental impact of energy storage, further supporting global sustainability efforts.

Innovation and Technology

Innovation and Technology: Energy Dome's CO2 Battery leverages a unique and innovative approach to energy storage that sets it apart from traditional systems. The key technological advancements include:

Liquid CO2 Storage: Unlike conventional batteries that rely on chemical reactions, the CO2 Battery stores energy by compressing CO2 gas into a liquid state during periods of excess energy production. When energy demand is high, the liquid CO2 is allowed to expand back into a gas, driving a turbine to generate electricity. This process is both efficient and cost-effective, allowing for long-duration energy storage at a lower cost than traditional lithium-ion batteries.

Thermodynamic Cycle: The CO2 Battery utilizes a closed-loop thermodynamic cycle, which ensures minimal energy loss and high efficiency. This cycle takes advantage of the physical properties of CO2 to store and release energy with minimal environmental impact, providing a sustainable solution for energy storage.

Scalability and Flexibility: The modular design of the CO2 Battery allows for easy scalability, making it suitable for a wide range of applications, from small-scale installations to large grid-scale projects. This flexibility enables Energy Dome to cater to various energy storage needs, enhancing the adaptability and resilience of renewable energy systems.

Environmental Impact: The use of CO2 as the working fluid not only reduces the reliance on scarce and potentially harmful materials but also offers a way to utilize CO2 beneficially. By integrating this innovative technology, Energy Dome helps reduce the overall environmental footprint of energy storage solutions.

Case Studies

Pilot Project in Sardinia, Italy

Energy Dome successfully implemented its first Carbon Dioxide Energy Storage System pilot project in Sardinia, Italy. This project was designed to integrate the innovative storage system with a local solar farm, capturing and storing excess energy during periods of high solar output. During peak demand times, when solar energy production is low, the stored energy is efficiently released back into the grid. This approach ensures a consistent and reliable supply of renewable energy, significantly reducing the need for fossil fuel-based power plants.

The Sardinia pilot project exceeded expectations, demonstrating the viability and efficiency of Energy Dome's technology in real-world conditions. The system's performance highlighted its potential to enhance grid stability and support broader adoption of renewable energy sources. By providing a dependable and sustainable energy storage solution, Energy Dome is paving the way for scalable implementation of its technology, marking a significant step towards a more sustainable energy future.

Partnership with Utility Companies

Energy Dome has partnered with several utility companies to deploy their CO2 Battery technology at grid scale. One notable example is a collaboration with a major European utility provider to integrate the CO2 Battery into their renewable energy infrastructure. This partnership aims to enhance the stability and reliability of the grid, ensuring a continuous power supply from renewable sources.

Industrial Applications

Energy Dome's technology has also been tested in industrial settings, where energy storage is critical for maintaining operations during power outages or fluctuations. In one case, a manufacturing plant adopted the CO2 Battery to store energy from its on-site solar panels, ensuring uninterrupted production and reducing energy costs. The system proved to be highly effective, providing a stable energy supply and contributing to the plant's sustainability goals.

Community Renewable Energy Projects

In addition to large-scale deployments, Energy Dome has supported community-based renewable energy projects. For instance, in a rural area with limited access to reliable power, the CO2 Battery was used to store energy from a local wind farm. This project not only provided a consistent power supply to the community but also promoted energy independence and sustainability.

Market Position

Industry Overview

The energy storage industry is undergoing a significant transformation, spurred by the accelerating adoption of renewable energy sources and the growing demand for reliable and efficient storage solutions. This evolution is essential for addressing the intermittency challenges associated with renewable energy, ensuring a consistent and stable power supply. As the world shifts towards more sustainable energy practices, the need for advanced storage technologies has never been more critical.

Energy Dome operates within this dynamic and rapidly changing landscape, focusing on long-duration energy storage solutions that are designed to complement intermittent renewable sources such as solar and wind. By providing a reliable means to store excess energy generated during peak production times and release it when needed, Energy Dome plays a crucial role in balancing supply and demand. This capability is vital for maintaining grid stability and enhancing the overall efficiency of renewable energy systems.

The company's innovative Carbon Dioxide Energy Storage System positions it as a key player in the transition to a sustainable energy future. Energy Dome’s technology leverages liquid CO2 to store energy, offering a cost-effective and scalable solution that addresses the limitations of traditional battery storage systems. This approach not only supports the integration of renewable energy into the grid but also contributes to significant reductions in carbon emissions, aligning with global climate goals.

As the energy storage industry continues to evolve, companies like Energy Dome are at the forefront of driving innovation and change. Their pioneering solutions are essential for enabling the widespread adoption of renewable energy and ensuring a resilient, sustainable energy infrastructure. With a focus on long-duration storage, Energy Dome is poised to make a substantial impact on the energy landscape, supporting the transition to a cleaner, more sustainable future.


Major competitors in the energy storage market include companies like Tesla (with its Powerwall and Powerpack systems), Fluence, and NextEra Energy. What sets Energy Dome apart is its use of liquid CO2 for energy storage, which offers several advantages over traditional lithium-ion batteries, such as lower costs, longer storage duration, and reduced environmental impact. This unique technology positions Energy Dome as a distinctive and potentially disruptive force in the industry.

Challenges and Opportunities

One of the main challenges Energy Dome faces is the need to scale its technology from pilot projects to large-scale commercial deployments. Additionally, the company must navigate regulatory hurdles and ensure its technology meets the varying standards and requirements of different markets. However, the growing emphasis on decarbonization and the global push for sustainable energy solutions present significant opportunities for growth. Energy Dome has the potential to capture a substantial market share by addressing the critical need for cost-effective and efficient long-duration energy storage solutions, thereby making a considerable impact on the renewable energy sector.

Sustainability and Impact

Environmental Impact

Energy Dome's CO2 Battery significantly contributes to reducing carbon emissions by enhancing the reliability and efficiency of renewable energy sources. By providing long-duration energy storage, the CO2 Battery enables a greater proportion of energy from solar and wind farms to be stored and used when needed, reducing the need for fossil fuel-based power plants. This technology helps mitigate greenhouse gas emissions, supporting global efforts to combat climate change and transition to a more sustainable energy infrastructure.

Certifications and Awards

Energy Dome has been recognized for its innovative contributions to sustainable energy storage. Notable certifications and awards include:

  • European Commission’s Horizon 2020 Funding: Energy Dome received this prestigious grant to support the development and scaling of their CO2 Battery technology, validating the project's potential impact on Europe's renewable energy landscape.

  • Cleantech Group’s Global Cleantech 100: Energy Dome was named in this list, highlighting the company as one of the top private companies delivering sustainable innovation.

  • Innovation Award from the Italian Ministry of Economic Development: This award recognized Energy Dome’s groundbreaking work in energy storage technology and its potential to transform the energy sector.

Future Goals

Energy Dome has ambitious plans to expand the deployment of their CO2 Battery technology globally. Their future sustainability goals include:

  • Scaling Commercial Deployments: Energy Dome aims to scale up the deployment of their CO2 Battery systems to large-scale commercial projects, particularly in regions with high renewable energy adoption.

  • Technological Advancements: Continued research and development efforts are focused on enhancing the efficiency and capacity of the CO2 Battery, making it even more cost-effective and environmentally friendly.

  • Global Expansion: Energy Dome plans to establish partnerships and projects in new markets, including North America and Asia, to promote the widespread adoption of their energy storage solutions.

  • Sustainability Initiatives: The company is committed to achieving net-zero emissions within its operations and supply chain, further contributing to global sustainability goals.

Community and Social Responsibility

Energy Dome actively engages with local communities and participates in global initiatives aimed at promoting sustainable energy practices. They collaborate with local governments, non-profits, and community organizations to support renewable energy projects and ensure that the benefits of their technology reach a wide audience. For instance, Energy Dome has partnered with community renewable energy projects in rural areas, providing energy storage solutions that help improve energy access and reliability.

The company is committed to fostering education and awareness about sustainable energy technologies. The company has established partnerships with academic institutions to support research and development in energy storage and renewable energy. They offer internships and scholarships to students pursuing careers in clean energy and regularly participate in conferences and seminars to share knowledge and innovations. Additionally, Energy Dome conducts workshops and seminars for schools and community groups to educate the public about the importance of sustainable energy and the role of energy storage.


Energy Dome is at the forefront of innovation in the energy storage industry with its groundbreaking CO2 Battery technology. Founded in 2019 and based in Italy, the company has quickly established itself as a key player in the renewable energy sector. By providing a cost-effective and efficient solution for long-duration energy storage, Energy Dome significantly contributes to carbon reduction and the integration of renewable energy sources.

The company's unique approach, leveraging liquid CO2 for energy storage, sets it apart from traditional battery technologies, offering numerous advantages such as lower costs, longer storage durations, and a smaller environmental footprint. Successful implementations of the CO2 Battery in various settings, including pilot projects in Italy and partnerships with utility companies, demonstrate its effectiveness and versatility.

Energy Dome's commitment to sustainability extends beyond its products, with active engagement in community initiatives, educational partnerships, and employee-driven sustainability programs. Recognized by prestigious awards and supported by substantial funding, Energy Dome is well-positioned to scale its operations globally and make a significant impact on the transition to a sustainable energy future.

In summary, Energy Dome plays a crucial role in the carbon zero emission industry, driving forward the adoption of renewable energy through innovative storage solutions and contributing to a more sustainable and resilient energy infrastructure.

Karol Kaczmarek
Written by:
Karol Kaczmarek
Co-founder of Net Zero Compare
Karol is a seasoned entrepreneur and co-founder of A&K Ventures OÜ. With a strong foundation in quantitative economics, he has a proven track record in strategic consulting, real estate, and global business expansion. Karol is dedicated to leveraging innovative technologies and creative business strategies to drive growth and transformation in every venture.