Study of Lithium-Titanate-Oxide (LTO) Batteries under High Charge/Discharge Rates
Abstract
The US Navy will face many challenges as they attempt to integrate high power, transiently operated, loads into the next generation of naval vessel. These loads will introduce significant variation into the power system~s load profile. The loads may not always be predictable and therefore may have adverse effects onpower quality when operated. To mitigate variability, intelligent energy storage systems may be utilized as a buffer within the power system, allowing stiff sources to maintain a steady baseload and acceptable power quality. With the integration of transient loads and energy storage into the power system, many challenges will arise that must be further studied and better understood prior to deployment. Among the challenges are understanding the performance characteristics of the many energy storage choices that are available and ofcourse choosing the right one. Lithium-ion batteries possess the highest combined power and energy density making them very attractive however even choosing the right lithium-ion battery is very difficult. Some applications demand higher power density while others need more energy density. Safety, cycle life, and recharge rate are additional metrics that must be heavily considered in the decision. In recent years, the Navy has heavily evaluated the lithium-iron-phosphate (LFP) chemistry due to its modest power density, modest energy density, modest cycle life, and high safety. Though the LFP chemistry has shown a great deal of promise in the studies performed so far, other chemistries still need to be considered and studied as well. The lithium-titanate-oxide (LTO) chemistry is one that offers high safety, high cycle life, modest power density, lower energy density, and most importantly operation at high symmetric charge/discharge rates. With these properties it has the ability to be treated as a both a battery and as an ultracapacitor with significantly higher energy density, depending on what the application requires. It is proposed here that theUniversity of Texas at Arlington (UTA) assist the Naval Surface Warfare Center ~ Philadelphia Division (NSWC-PD) in better understanding the present state of the art of the LTO chemistry. Toshiba, a Japanese company, is a market leader of this technology and it is proposed that UTA utilize funds from the ONRForeign Competitive Technology (FCT) program to complete the proposed tasks.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 17, 2018
- Source ID
- N000141912031
Entities
People
- David A. Wetz
Organizations
- Office of Naval Research
- United States Navy
- University of Texas at Arlington