Ligna Energy

Ligna Energy is a leading developer of ultra-thin supercapacitors based on advanced biomaterials. Our lightweight and ultra-thin products enable more sustainable military, defense and government operations with reduced environmental footprints, reducing the reliance on constant battery replacements.

Cutting-Edge Supercapacitor Technology

Our ultra-thin and bendable supercapacitors deliver instantaneous power in a paper-thin pouch format – ideal for remote sensors, drones, and wearable technologies in the field. Built from bio-based materials and entirely free from toxic substances, S-Power supercapacitors offer a unique combination of safety, sustainability, and high performance without compromise.

They pair perfectly with energy harvesting systems for sustainable, low-maintenance power solutions and can also be combined with batteries to handle peak current demands. This not only extends battery life but also improves system efficiency by reducing strain during high-power events. All our products are manufactured in Sweden using non-flammable, non-toxic, and conflict-free materials.

Our Production Process

Our unique production process is designed to ensure high levels of scalability and automation, resulting in increased production speed and cost-effectiveness compared to batch processes. We utilize three main stages:

Slot-Die Coating

Electrode materials are formulated into a water-based slurry, which is pumped into a slot-die and coated as four activated carbon stripes on an aluminium foil. The coated aluminium passes through a ten meter long dryer to remove all the water, and is then wound up on a roll at the end of the coating line.

Roll-to-Roll Assembly

The coated aluminium foil undergoes multiple conversion steps, which involve adding barrier foils and a separator. This results in two electrodes sandwiching the separator, all contained within a layer of barrier foil. At this stage we can perform a variety of additional processes such as lamination, slitting, and die-cutting, allowing us to create custom solutions to meet specific customer requirements.

Quality Control

We place the utmost importance on not only maintaining but continuously improving the quality of our products. To achieve this, we carry out inspection of incoming material, collection of critical in-line data during the manufacturing process, and testing of the final product according to relevant industry standards.

S-Power Supercapacitors

Our S-Power supercapacitor range includes some of the thinnest and most compact offerings in the world, with a high degree of bendability that allows them to be installed into a variety of space-constrained form factors and unique geometries.

With low leakage current and excellent cycling and power capabilities, they are ideal for applications that require repeated rapid charging and discharging. The current product portfolio includes:

S-Power 2S – Larger-capacitance option, ideal as a short-term energy storage component for energy harvesting solutions.

• • • 30 x 42 x 0.5 mm
    • 1.2 F capacitance
    • 2.7V rated voltage

S-Power 2R – Ultra-miniature form factor, designed for short-term energy storage in active smart cards and also highly suited for battery support.

• • • 19 x 22 x 0.40 mm
    • 60 mF capacitance
    • 2.7V rated voltage

Applications

Energy Harvesting

The combination of compact and lightweight supercapacitors with energy harvesting technologies that take advantage of ambient sources such as solar provides an efficient solution for powering a wide range of dismounted soldier and field equipment.

By reducing the reliance on traditional batteries, these solutions provide continuous and maintenance-free operation, and are particularly suited to deployment in remote and hard-to-access locations.

Asset Tracking

Our supercapacitors are ideal for incorporation into asset tracking solutions, allowing the creation of ultra-thin devices that can be attached to a wide variety of items. These solutions enable real-time tracking and optimized defense supply chain operations, and help contribute to reduced fuel consumption and carbon emissions.