Engineered Protein-Based Ionic Conductors for Sustainable Energy Storage Applications

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Bioelectronics

Background:

• Protein-based biomaterials offer sustainable and biocompatible alternatives to traditional ionic conductors.
• Advancements in green energy storage and bioelectronic applications require efficient ionic conductors.

Purpose of the Study:

• To engineer a self-assembling protein scaffold with enhanced ionic conductivity.
• To improve proton transport, hydration, and ion diffusion through rational protein design.

Main Methods:

• Engineered a repeat protein scaffold with selective glutamic acid incorporation.
• Utilized self-assembly properties for macroscopic film formation.
• Integrated engineered protein films into supercapacitor devices.

Main Results:

• Engineered protein films exhibited an order of magnitude higher ionic conductivity than unmodified counterparts.
• A further ten-fold enhancement in conductivity was achieved with controlled salt ion addition.
• Supercapacitors with engineered protein films demonstrated competitive energy storage performance.

Conclusions:

• Rational protein design can create efficient, biocompatible, and sustainable ionic conductors.
• Engineered protein films possess the stability and processability for next-generation energy storage and bioelectronic devices.
• The study highlights the potential of protein-based materials in advancing green energy and bioelectronics.