Integrated flexible energy system based on two-dimensional (2D) Materials
Abstract
With the advents of miniaturized electronic devices and energy production from renewable sources, there has been ever-increasing demand for high performance energy systems with high energy density, high power density, and longer cycle life, especially for portable electronics and unmanned aerial vehicles (UAV). Here, we propose to develop a novel integrated, flexible, self-powered energy system with two major functionalities - high-efficiency planar perovskite solar energy conversion and high density Li-S rechargeable energy storage that can provide continuous power to UAVs (e.g., high-altitude solar powered aircraft) and wearable electronics. The proposed technology is based on the PIs’ (US-PI and KR-PI) recent achievements: (a) Choi’s (US-PI) ground-breaking technology for Li-S battery based on atomic layer 2D MoS2 coated Li-metal with much higher energy density ( > 600Wh/kg, three times higher than the Li-ion battery) and much longer stability than the conventional lithium-ion batteries, as reported in Nature Nanotechnology (2018), and (2) Shin’s (KR-PI) recent work on high efficiency perovskite solar cells (PSC) with stable performance for more than 500 hours and energy conversion efficiency of over 20%. We propose to integrate (unify) the two parts of the self-powered system, energy conversion and energy storage, in one device with the novel design of a shared-electrode. This will lead to very high energy storage efficiency of the self-powered energy system and provide extremely effective space utilization (compactness) and very high energy density (per weight) of the system. With this research the flexible selfpowered energy system based on high-efficiency, long-cycle life solar cells and high efficiency Li-S batteries would become a reality. The outcome of this project is therefore expected to have a profound impact on solar energy conversion and storage in specialized applications
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 11, 2018
- Source ID
- FA23861814075
Entities
People
- Wonbong Choi
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of North Texas