The French company Nawa has started production of a new electrode that will radically increase the performance of existing and future lithium batteries, tripling their energy density, ten times their capacity, much faster recharging time and five times longer battery life.
Nawa Technologies is known as a manufacturer of supercapacitors, and has already announced that the same electrodes used in these devices are going to be adapted for current lithium ion batteries to significantly increase their performance.
The company’s main innovation is the device of the electrode and the movement of ions in the active material of the electrode. Modern activated carbon electrodes are made of a mixture of powder, additives and a binder. Where carbon nanotubes are used, they take the form of tangled spaghetti. This causes ions to move chaotically and their path to the current collector is often blocked.
The vertically positioned Nawa Carbon Nanotubes in the anodes or cathodes are more like a hairbrush with hundreds of billions of straight lines that conduct the spaghetti on each square centimeter of surface. Each of them is coated with an active material, reports New Atlas.
The result is a significant reduction in ion run length, as each lithium particle more or less directly connects to the nanotube. The distance that the ions must travel through the lithium material is only a few nanometers, not a few micrometers, as in a conventional electrode.
This increases the power density – the ability of the battery to be quickly charged and discharged – by a factor of ten, meaning that the battery can become smaller and be charged faster. According to the company, in five minutes you can recharge the battery by 80%.
In addition, the use of ultra-light nanotubes and less bonding material will make the battery lighter and more compact. The density of energy both in mass and volume will jump two to three times.
Finally, the rigid structure and large surface area of nanotubes eliminate a number of risk factors that cause them to lose performance and eventually deteriorate. Nawa calculates that this battery will last five times longer.
The company plans to release the new technology in a simplified version to the market in 2022. And a year later, the full version should appear.
A new electrode for more productive production of hydrogen during the electrolysis reaction developed by chemists from the U.S.. It consists of nickel microfibers. It was 50 times more productive than alkaline electrolysers, which are now used for water electrolysis, the developers have calculated.