This project aims to develop a novel, lightweight, and environmentally friendly battery that generates power using natural salinity gradients found in everyday fluids such as water, sweat, saliva, and urine. Unlike traditional batteries, which often rely on scarce and geopolitically sensitive materials like lithium, this new battery uses readily available and sustainable materials and operates without liquid electrolytes. Its dry, shelf-stable design makes it ideal for powering small, portable devices including wearable sensors, medical diagnostics, and ingestible electronics. The proposed osmotic battery harnesses nanoscale materials to create membranes that selectively transport positive and negative ions, enabling efficient on-demand energy generation. This innovation addresses the growing need for compact, safe, and eco-friendly power sources and supports NSF’s mission by promoting the progress of science and engineering, advancing environmental sustainability, and fostering health-related technologies. The project will also engage undergraduate students in cutting-edge research and integrate findings into engineering education, contributing to workforce development and STEM outreach. This project proposes the design and fabrication of an osmotic battery based on ion-selective membranes derived from two-dimensional nanomaterials, one for cation transport and another for anion transport—combined with ion-infused aerogel layers. These components form a dry, gelatin-based