Iodopropyl-branched polysiloxane gel electrolytes with improved ionic conductivity upon cross-linking

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy

Background:

• Dye-sensitized solar cells (DSSCs) require efficient electrolytes for optimal performance.
• Polymeric electrolytes offer potential advantages in terms of mechanical stability and processability.
• Developing stable and highly conductive gel-electrolytes remains a key challenge in DSSC technology.

Purpose of the Study:

• To synthesize and characterize novel poly[(3-N-methylimidazoliumpropyl)methylsiloxane-co-dimethylsiloxane]iodides as polymeric hosts.
• To develop in situ cross-linkable iodine/iodide-based gel-electrolytes for dye-sensitized solar cells.
• To investigate the effect of polymer cross-linking on ionic conductivity.

Main Methods:

• Synthesis of poly[(3-N-methylimidazoliumpropyl)methylsiloxane-co-dimethylsiloxane]iodides.
• Partial quaternization of the synthesized polymers.
• Thermal cross-linking to form a 3D polymeric network.
• Electrochemical characterization of the gel-electrolytes.

Main Results:

• Successful implementation of poly[(3-N-methylimidazoliumpropyl)methylsiloxane-co-dimethylsiloxane]iodides as polymeric hosts.
• Formation of a 3D polymeric network via thermal cross-linking.
• Dramatic enhancement of ionic conductivity in the cross-linked gel-electrolytes.

Conclusions:

• The developed cross-linked gel-electrolytes show promise for enhancing dye-sensitized solar cell performance.
• The in situ cross-linking strategy effectively improves ionic conductivity.
• These novel polymeric hosts offer a viable pathway for advanced DSSC electrolytes.