Currently one of the major limitations of battery power, energy and lifecycle is the design and material used for the electrode. Based on inefficient powders, existing electrodes have low electrical, thermal and ionic conductivity, along with poor mechanical behaviour when discharged and recharged, and can also suffer from early delamination and degradation leading to safety and lifecycle issues.
But based on NAWA's patented vertically-aligned carbon nanotube (VACNT) design, which is also the basis of its next-generation ultracapacitors, the Ultra-Fast Carbon Electrode combines the highest ionic conductivity – thanks to a 3D fully accessible nanostructure – with the highest electrical and thermal conductivity, provided by its arrangement of 100 billion nanotubes per sq cm, all vertically aligned.
Nano-design for quantum leap in performance
This new 3D electrode geometry can solve the vast majority of performance constraints faced by global battery makers, boosting battery power by a factor 10, energy storage by up to three, lifecycle by up to five and reduce charging time down to minutes instead of hours. What's more, with the electrodes accounting for almost 25 per cent of the total battery cost and today's global lithium-ion battery market worth in excess of $35 billion, NAWA believes that its new design can offer significant cost savings.
Applicable to all chemistries
NAWA's Ultra-Fast Carbon Electrode is a universal system, available as a primer for existing electrodes – where the VACNT increases electrical conduction – and ready for market in as little as 12 months. It is also available as a full 3D-electrode (anode or cathode) where the VACNT themselves serve as a framework on which lithium insertion material can be coated.
NAWA is developing different concepts of coatings with various chemistries and partners - it expects the technology to be introduced and in production as early as 2023.
Both electrode products benefit from the six years NAWA has spent developing its VACNT growth process for its next-generation ultracapacitors, having now reached the capacity to grow VACNT on both sides of a one metre width aluminium substrate in a roll-to-roll manner, with no solvents or binders, reducing the electrode cost on a $/Wh basis by 30 per cent.
Eco-friendly
NAWA's dry electrode technology also brings significant environmental advantages, being easily recyclable and eco-disposable at the end of its long lifecycle. As a result, NAWA estimates that by using an Ultra-Fast Carbon Electrode in lithium battery cell, the CO2 footprint could be reduced by as much as 60 per cent, simply because less active material is required.
Ulrik Grape, CEO of NAWA Technologies said: "NAWA's Ultra Fast Carbon Electrode will allow us to charge batteries faster, go further and for longer – and all with a product based on one of the world's most abundant and green materials: carbon. Our technology can help to dramatically reduce the environmental impact of battery systems, so much so that we believe this electrode innovation could halve the time in which an electric vehicle pays back the CO2created in its manufacture – as well as being able to recharge in the same time it takes to refuel, and drive the same distance on electricity as a tank of gas."
Source: NAWA Technologies