Evaporation-Driven Fabric for Synergistic Water-Electricity-Lithium Co-Production

Area of Science:

• Materials Science
• Energy Harvesting
• Environmental Engineering

Background:

• Water evaporation is a natural process with potential for energy and resource recovery.
• Tailored material properties are crucial for efficient water-material interactions.
• Existing methods for co-production of water, electricity, and lithium are limited.

Purpose of the Study:

• To design and demonstrate an evaporation-driven fabric (e-fabric) for co-producing electricity and lithium from brine.
• To optimize functional layers for enhanced performance in water-electricity-lithium utilization.
• To decouple adsorption from power generation to prevent performance degradation.

Main Methods:

• Fabrication of a multi-layered e-fabric with carbon black, Al2O3, and protonated lithium titanate (HTO) layers.
• Characterization of hydrovoltaic output under solar irradiation.
• Measurement of evaporation rate and thermal insulation properties.
• Assessment of Li+ adsorption capacity and recovery efficiency.

Main Results:

• The e-fabric generated a sustained hydrovoltaic output with ≈7.7 µA cm⁻² current density.
• An evaporation rate of 1.42 kg m⁻² h⁻¹ was achieved with reduced thermal dissipation.
• The HTO layer demonstrated a Li+ adsorption capacity of 40.87 mg m⁻² with 93.2% recovery efficiency over 8 cycles.
• Decoupled operation prevented ion accumulation issues.

Conclusions:

• The developed e-fabric offers a promising approach for simultaneous water-electricity-lithium co-production from brine.
• The optimized multi-layer design enhances efficiency and sustainability.
• This technology has potential applications in resource recovery and sustainable energy generation.