Carbon-Ion Energy is developing and bringing to market the next generation of capacitive energy storage

C-Ions are electrostatic or capacitive energy storage devices that use improved materials and efficient design to solve 3 global problems:

Dynamic containment is one of a new suite of frequency response services that has been rolled out by the UK national grid in 2021 and represents a good example of how the move to renewable generation offers opportunities for fast-responding energy storage.

Significant loss of grid inertia has led to more numerous frequency deviations than before, and a range of technologies is needed to plug this gap as we move toward a grid that is fully supplied by sustainable generation – this will be true in every country in the world if ‘net-zero’ is adopted.

C-Ion can perform several roles. It harnesses the ability to perform fast-responding short-term energy storage to take energy from or provide energy to the grid, and can provide support to improve the round-trip efficiency of renewable energy generation assets.

It can provide lifetime extension of other energy storage assets through hybridization at either system or grid level by providing peak shaving of transient loads on existing energy storage technologies and by bridging the gap between batteries and supercapacitors in aggregated generation, which enables enhanced revenue stacking


Drivers are used to filling a tank in a gasoline, petrol, or diesel vehicle in 5 minutes and then driving 500 miles or more before they must fill up again. Carbon-Ion believes that drivers will demand the same experience before switching to electric vehicles, and Carbon-Ion’s C-Ion technology could help make this possible. 

Autonomous vehicles make multiple short journeys and require constant sources of energy for a 24-hour operation. A fast-charging solution here could allow minimization of individual charging events to give near-continuous operation.

By upgrading the power of energy delivery to the vehicle, without the need for supply infrastructure upgrades, C-Ion technology could eliminate many of the challenges of future mobility.

Another variant of C-Ion could also be built into the structure of the vehicle (structural energy storage) making for simpler and cheaper onboard energy storage than the complex lithium packs currently used. Carbon-Ion also has IP in structural energy storage.

C-Ion is about improving the performance and manufacturability of supercapacitors. This is achieved by using improved materials that allow characteristic long life and excellent power density, combined with more energy density. C-Ion uses a combination of advanced carbons and ionic electrolytes. No flammable chemical solvents are used in manufacturing or the electrolyte. This makes C-Ion very safe, not flammable, and with improved sustainability.

Our C-Ion cells are being designed for a 30-year calendar life and a minimum of 100k charge/discharge cycles.

Carbon-Ion cells have unique properties that allow them to charge and discharge extremely quickly, while still retaining meaningful energy storage, which enables delivery of fast, clean power on demand. These unique Carbon-Ion cells are also able to deliver a powerful boost in hybrid systems, such as grid revenue stacking or electric aviation.

Carbon-Ion will enable power on demand. 

Currently, we are in the midst of a transition to fully electric living, which is disrupting nearly every industry in the world. As a result, there is a critical need for better and more diverse energy storage in order for many industries to provide more impactful solutions to consumers of all kinds. C-Ion can bridge this gap in a groundbreaking way by delivering fast, clean power on demand, to a broad range of applications from infrastructure to individual products, and from grid services to UAVs.

Fast, Reliable, Safe

Carbon-Ion’s technology and unique material properties allow an extremely fast response time that adds more value to the entire power system. Carbon-Ion cells have high cycle life and ramping capabilities, and they are able to perform repeated high cyclic storage without performance degradation. This will create significant efficiencies in energy systems that will, in turn, save money, time, and resources.