The development and deployment of safe, low-cost, high-performance batteries is of great societal need for affordable and reliable energy storage. This project aims at advancing the development and discovery of high-performance, non-flammable, solid polymer electrolytes for rechargeable lithium batteries. The team integrates expertise in theory and simulation of materials, materials synthesis, and the characterization of polymer electrolyte materials. The project involves a tightly coupled research approach in which state-of-the-art theoretical and coarse-graining methods drive the screening and design of new polymer electrolytes, as well as the detailed understanding of ion diffusion mechanisms; promising polymer electrolyte candidates are synthesized in the laboratory, and their ion transport characteristics are measured and tested in full cells. A key strength of the research effort is the tight integration and synergy between simulation, theory, synthesis, characterization, and cell assembly. Pursuit of this integrated research effort will lead to a significant progress towards the goal of rational materials design for polymer systems.