My research objective is to enable multifunctional energy systems by creating three-dimensional, hybrid-composite battery architectures using low-cost, green manufacturing methods. Human-made energy systems, such as batteries, are typically designed to perform only one function—to store and release energy. In contrast, energy systems found in nature, such as animal fat, perform multiple functions that include mechanical padding, thermal insulation, and chemical energy storage. This multifunctional approach allows animals to efficiently carry large amounts of energy despite the low energy density of fat. I therefore aim to create batteries with unique mechanical, chemical, thermal, optical, and electromagnetic properties capable of performing numerous functions such as absorbing impacts, bearing loads, damping sound, suppressing vibration, harvesting energy, transmitting light, providing insulation, and sensing mechanical and electromagnetic stimuli.