Field-assisted sintering or control over polymorphs in polycrystalline lithium ion conducting cerami
Abstract
Replacing volatile and flammable liquid electrolytes (ion conductors) with solid ion conductors has the potential to safely energy s,torage systems. Safe, energy dense, and rechargeable batteries are of significant interest for on board power applications in Naval,ships and submarine applications. Increasing the energy density by 2-3X can reduce space and weight requirements. However, for futur,e adoption, it is critical to better understand how ions move within these novel materials and how processing strategies (e.g. field,-sintering) can be used to engineer ceramics with control structure. Nano- and microstructural heterogeneity within a solid electrol,yte can lead to unfavorable electro-chemo-mechanical dynamics and can contribute to non-optimal material utilization, mechanical deg,radation, and poor ion transport. Examples of heterogeneity include local variation in chemistry (dopant), grain size, grain boundar,y size, crystallinity, surface roughness, and the existence of structural polymorphs (e.g. cubic, tetragonal, etc.). These structur,al heterogeneities can influence a range of mechanisms (transport, kinetics, etc.) that occur at various time- and length- scales.,Here, we seek to understand the role dopants and processing strategies influence the formation low- ion-conducting polymorphs in cer,amic lithium ion conductors. Control over material phases at the nano-scale may enable next generation materials systems for onboard, and in-field energy storage systems. "Approved for Public Release"
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 04, 2022
- Source ID
- N000142312047
Entities
People
- Kelsey Hatzell
Organizations
- Office of Naval Research
- Trustees of Princeton University
- United States Navy