DEVELOPMENT, STUDY, AND PROTOTYPING OF AN ALL-SOLID MEDIATOR SUPERCAPACITATOR FOR NAVAL APPLICATIONS
Abstract
Employ a series of novel concepts, approaches, and materials to develop an all-solid-statemediator supercapacitor that has a specific energy of 50-100 Wh/kg at 15 kW/kg. Based on understandings and achievements obtained in previous studies, we propose to employ a series of novel concepts, approaches, and materials to develop an all-solid-state mediator supercapacitor that has a specific energy of 50-100 Wh/kg at 15 kW/kg. Namely, the specific energy of the all-solid-state mediator supercapacitor is comparable to that of a Liion battery but the specific power (15 kW/kg), charge rate (>10C), cycle life (>10000), safety level, and resistance to low temperature are much greater than those of a typical Li-ion battery. This will greatly benefit Navy and Marine’s power sources, especially those require both high energy and power. Specifically, we will select and synthesize new mediators with capability of multiple valence changes during charge and discharge within the voltage window of the electrolytes. We will also improve the interfacial structure between the mediator doped electrolyte and carbon materials including active carbon, graphene, and carbon nanotube/fibers to enable higher conductivity and accessibility. In addition, we will develop new mediator doped polymer electrolytes with wider voltage windows. Finally, we will streamline the supercapacitor fabrication process to ensure a high reproducibility and to fabricate 2 Wh prototypes. This allows us to find industrial partners and to smoothly transition the technology to Navy and Marine Corp applications. On these research objectives, the University of Miami team and Naval Surface Warfare Center at Carderock Division (NSWCCD) team will work closely. The NSWCCD team will focus on in-situ and ex-situ characterizations of the materials and supercapacitors using scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), X-ray adsorption spectroscopy (XAS), and X-ray photoelectron spectroscopy (XPS) to probe the composition, morphology, atomic level structure, chemical states, reversibility and stability of the redox couple and interactions between various components (e.g., mediators, electrolyte and carbon) at the molecular level. These efforts will provide guidance necessary in the process of developing the novel all-solid-state mediator supercapacitors.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 10, 2017
- Source ID
- N000141712362
Entities
People
- Xiangyang Zhou
Organizations
- Office of Naval Research
- United States Navy
- University of Miami