GREENCAP project

Development of Sustainable Supercapacitors



The EU project GREENCAP will realize a novel type of sustainable and high-energy density supercapacitors, which exploit layered 2D materials, including graphene and MXenes as electrode materials, and ionic liquids as high-voltage electrolyte.


Design, production, and upscaling of novel CRM-free and sustainable 2D electrode materials for supercapacitors.

Formulation of novel CRM-free electrolytes based on ionic liquids (ILs) and mixtures of ILs and organic solvents for supercapacitors.

Fabrication and characterization of sustainable 2D material- and IL-based supercapacitors beyond state-of-the-art electrochemical double-layer capacitors and with battery-like characteristics.

Creation of innovative SoX monitoring tools (SoX denotes the state of health -SoH-, state of charge -SoC, state of energy -SoE-, state of power -SoP-, and state of safety -SoS-) and management system for layered two-dimensional (2D) materials and ionic liquids-based supercapacitors.

Identification of new high-end applications based on comprehensive impact assessment of social, environmental, and economic sustainability.


GREENCAP will design, develop, and prototype in industrial lines high-performance and sustainable layered two-dimensional (2D) materials and ionic liquids-based cylindrical supercapacitors with their own management system that 1) exhibit a battery-like energy density (i.e., >20 Wh/kg, >16 Wh/L), 2) retain the distinctive superior power densities (>1000 W/kg, >500 W/L) and high cycle life (>1000000 charge/discharge cycles) of traditional SCs, i.e., electrochemical double layer capacitors, 3) eliminate the use of CRMs, aiming at reaching TRL 6.



GREENCAP will realize a novel type of sustainable and high-energy density supercapacitors, establishing an entire device manufacturing chain, which considers:

  • scalability and sustainability of novel CRM-free 2D electrode materials and ionic liquid-based electrolytes, produced at industrial scale through eco-friendly processes by means of CRM-free materials, while guaranteeing reproducible characteristics.
  • synergic coupling between layered 2D materials and IL-based electrolytes, whose interaction results in electrochemical charge storage mechanisms leading to high electrode performances in terms of capacitance/capacity and CD cycling stability.
  • scalability and sustainability of electrode fabrication and SC assembly, which must be therefore feasible in industrial SC manufacturing lines.


The GREENCAP workplan is divided into 4 research-related work packages (WPs), one WP for impact assessment and benchmarking and 2 management and dissemination-related WPs.


The results of the GREENCAP project are documented in reports. As soon as the reports are available they will be published here.

Facts and figures

Start date: 01 January 2023
Duration: 36 months
Funding by the EC: 5.4 M€
GA number: 101091572


GREENCAP is conducting research in the field of 2D materials and ionic liquid-based electrolytes development and will disseminate scientific results to peers in the field by means of scientific publications. All relevant publications will be posted on this page.

Project info
Project progress


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