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LeydenJar | revolutionary type of anode battery

From phone to car: 50% higher battery performance

For more information go to the website of LeydenJar


The intention was to develop new thin film solar technology, but the invention proved to be more suitable for use in batteries. Thus, a 'failed' project became a promising start-up in a relatively short period of time. LeydenJar has developed a prototype that increases the energy density of batteries by fifty percent. Major suppliers of consumer electronics and car manufacturers are now knocking on the door.
The idea was developed a few years ago into an invention within the former ECN. Once it had been determined that it was much more suitable for batteries, an entrepreneurial duo picked it up, worked out a plan, sought financiers and within a year the company LeydenJar was a fact.

Unique technology

What makes the technology developed unique worldwide is the use of pure silicon for anodes, a part of the battery, instead of the traditional graphite. Silicon offers a much higher capacity. The difficulty is to process silicon anodes in Li-ion batteries in a mechanically stable way. LeydenJar has succeeded in applying silicon anodes in a porous structure to a copper substrate using a special deposition process. Tests in the lab have shown that the battery's energy density can increase by as much as half.

From smartphone to sustainable storage

These batteries will soon be found in a variety of products: smartphones and other consumer electronics, electrically-powered cars and, in time, even storage systems for renewable energy. Decentralised storage systems are an important part of the energy transition and are therefore a potential future market for LeydenJar. In the first instance, the company is focusing on improving battery life in smartphones and electric cars.

Optimising performance

The coming period will be devoted to further improving the performance of the anodes in the battery. The battery size needs to grow, with more and more energy storage per litre and an increase in the number of cycles of charging and discharging to optimise the desired lifetime. Once that is achieved, production of silicon anodes can start and the industry players will have at their disposal a battery that can store 50% more energy for application in their products. The High Tech Campus in Eindhoven will accommodate the anode production plant.

In addition to TNO, LeydenJar works closely with the ZSW knowledge institute in Baden-Württemberg, the Universität Münster and TU Delft. In addition to TNO, UNIIQ, the Brabant Development Company and an informal investor are shareholders on the basis of convertible loans.


Breakthrough in battery industry: LeydenJar boosts battery energy by 70%

21 July 2020
LeydenJar Technologies, a Dutch spin-out of TNO, has developed a new anode that will drastically change the battery industry. For the first time, anodes in lithium-ion batteries can be made from 100%... Read more


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