Periodic Reporting for period 1 - TRANS2DCHEM (Transition of 2D-chemistry based supercapacitor electrode material from proof of concept to applications)
Reporting period: 2022-09-01 to 2023-08-31
Currently, rechargeable lithium-ion batteries, the most widely used electrochemical energy storage system of today, are still limited in terms of power densities and fire safety issues in many applications. Within the ERC-CoG 2D-CHEM and the subsequent ERC-PoC UP2DCHEM, the team of prof. Otyepka developed a nitrogen super-doped graphene electrode material (SC-GN3), with an unprecedented density. Supercapacitors (SC) made by SC-GN3 material can achieve up to 75 Wh/kg (200 Wh/L) energy density and show high-power density capability with potential up to 19 kW/kg (50 kW/L), twice higher than reference state of the art. Increasing the energy density of SC beyond 25Wh/kg will offer a paradigm shift in SC technologies allowing their wide application in electric vehicles and as support for batteries in power levelling and quick response devices for high power applications.
The TRANS2DCHEM project intends to take this important field beyond its state-of-the-art, via the exploitation of the previously unexplored properties of the material, imparting top-rated performance in the respective energy storage devices. The proposal will bring the technology readiness of the described energy storage devices to a level of 6, by validating their operation in industrially-relevant environment in coin, pouch and wound (cylindrical) cells.
The wound element is almost ready, together with similar elements with standard industrial electrodes and standard industrial papers; this will allow to have a set of samples to monitor performance against laboratory scale. One of the topics was the connections that have to be made during the rolling of the wound element and not before electrode preparation. This caused an extra work to overcome the issue, which was successful and opened to electrode preparation line setup. A pipeline of suppliers for cost down against lab prices is installed. The assembly protocol for pouch cells was elaborated and several pouch cells have been assembled. Further optimization is planned.
A more detailed description of all results is described in Section B of the Technical Report.