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All-Organic Battery Based on Deep Eutectic Solvent and Redox-Active Polymers.

Matthias Uhl1, Sadeeda1, Philipp Penert2

  • 1Institute of Electrochemistry, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany.

Chemsuschem
|July 28, 2023
PubMed
Summary
This summary is machine-generated.

This study presents the first all-organic battery utilizing a Deep Eutectic Solvent (DES) electrolyte for sustainable energy storage. The novel organic battery demonstrates high coulombic efficiency and stable performance, paving the way for greener battery technologies.

Keywords:
all-organic batterydeep eutectic solventselectrochemistrypolymerssustainable chemistry

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Sustainable Energy

Background:

  • Growing demand for sustainable energy storage solutions.
  • Organic batteries offer a promising alternative to conventional batteries.
  • Deep Eutectic Solvents (DESs) are safe, eco-friendly electrolytes derived from sustainable sources.

Purpose of the Study:

  • To report the first all-organic battery cell employing a Deep Eutectic Solvent (DES) electrolyte.
  • To investigate the electrochemical performance of redox-active polymers in a DES electrolyte.
  • To evaluate the stability and efficiency of the novel organic battery system.

Main Methods:

  • Fabrication of an all-organic battery cell using poly(2,2,6,6-tetramethylpiperidin-1-yl-oxyl methacrylate) (PTMA) and crosslinked poly(vinylbenzylviologen) (X-PVBV) as electrode materials.
  • Utilization of a Deep Eutectic Solvent (DES) composed of sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and N-methylacetamide (NMA) as the electrolyte.
  • Electrochemical characterization including cycling tests and voltage plateau analysis.

Main Results:

  • The organic battery cell exhibits two distinct voltage plateaus at 1.07 V and 1.58 V.
  • Achieved high Coulombic efficiencies of 98%.
  • Observed unexpected stability of the X-PVBV/X-PVBV+ redox couple in the NaTFSI:NMA DES, contrasting with the X-PVBV+/X-PVBV2+ couple, leading to asymmetric capacity fading.

Conclusions:

  • The successful development of the first all-organic battery with a DES electrolyte represents a significant advancement in sustainable energy storage.
  • The study highlights the potential of DESs as safe and effective electrolytes for organic batteries.
  • Further research is needed to address the asymmetric capacity fading and optimize the long-term stability of the organic electrode materials in DES electrolytes.