The US Army Research Laboratory’s (ARL’s) Sensors and Electron Devices Directorate (SEDD) has developed and patented a number of inventions related to batteries and capacitors.
- Electrolytes for Next Generation 5V Li-ion Batteries. This drop-in technology enables at least 300 cycles at 5V, increases 4V cycles 50-100%, and is easy to produce. Technology Readiness Level (TRL) 6-7: Well developed and tested.
- High Cycle Life Cathode for High Voltage (5V) Li-ion Batteries. Enables Li-ion batteries to operate reliably at high voltage (~5V) with excellent cycle life. TRL 4: Fully functioning cell prototypes using ARL cathode.
- Better Performing Lithium/Carbon Fluoride Battery. Eliminates voltage delay and conserves capacity in Li/CFx battery cells. Drop-in method is ready for mass production. TRL 4: Fully functioning prototype cell fabricated using ARL process.
- Pure LiBOB Salt and Purification Process. Produces pure LiBoB salts that are thermally stable for high temp environments such as hybrid electric vehicles. Maintains 95% energy density after 1000 cycles. Out performs lithium salt and commercially-available LiBOB. TRL 6-7: Well developed and tested.
- Reducing Resistance in Li-ion Batteries. These additives improve performance by reducing “charge transfer” resistance in high-burst migration of ions in charge-discharge cycles, such as when electric vehicles accelerate or brake. Many applications, reduced, prototyped. TRL 6: Fully functioning battery prototypes using coin and pouch cell formats.
- High Voltage, Safer Lithium-Carbon Fluoride Battery. Safer method of manufacturing and higher running voltage and smaller voltage delay, as compared to Li/CFx batteries on the market today. Eliminates the use of fluorine gas and hydrofluoric acid. TRL 4: Fully functioning prototype cell.
- Ultra-fast Bi-directional Solid State Circuit Breaker. Senses current and provides over-current protection. Solid state device with high speed fault protection in the microsecond range. Small, light and rugged. Geared toward electric vehicle applications. TRL 4: Functional engineering prototype.
- Improved Electrolytes for Lithium/Air Batteries. Novel electrolytes and electrolyte solvents to significantly improve energy storage capacity and discharge rate capabilities of Li/Air cells using organic electrolytes. Uses commonly available materials. TRL 4: Functional laboratory cells.
- Improving Capacity Retention and Temperature Range of Li-ion Batteries. Improves cycle life, storage life, and charge retention, especially at elevated temperatures (up to 75OC). Compatible with current electrolyte manufacturing processes. TRL 5: Fully functioning battery prototypes.
- Reducing Irreversible Capacity Loss in Li-ion Batteries. Reduced first cycle irreversible loss of charge capacity by about one-half compared to existing Li-ion cells. Method is adaptable for mass production. TRL 5: Fully functioning battery prototypes.
- Preparing a Unique Lithium Salt for an Improved Electrolyte for Li-ion Batteries. Synthesis process for a new salt alternative to LiPF6 with better performance characteristics in cold and warm environments. Higher safety margins and a simple process. TRL 5: Functioning battery prototypes created using this synthesis process.
- Electrolyte Formulations for Wide Temperature Li-ion Batteries. Increases operating temperature upper limit by 25% from 60C to 75C and beyond with minimal performance loss. Less toxic material is compatible with existing manufacturing processes and is less expensive than current state-of-the-art. TRL 6: Fully functioning cell prototypes.
- High Capacity Metal/Air Battery. Molybdenum/Air primary battery with 2.5 times greater energy capacity than competing zinc/air battery. Enables longer, safer operation and a longer shelf life using commonly-available materials. TRL 4: Fully functioning prototypes in various small cell formats.
- Improving Low Temperature Operability of Li-uon Batteries. New electrolyte salt for secondary batteries that expands operational temperature range down to -40OC. TRL 5: Fully functioning laboratory scale prototypes made using novel salt.
- Producing a New Class of Composite Cathodes for Li-ion Batteries. Enables a new family of cathodes for less expensive, safer, and more environmentally benign secondary batteries. Performance comparable to more expensive materials. TRL 5: Fully functioning laboratory scale prototypes featuring cathodes made from ARL process.
- Improvement Through Protection: Enabling More Powerful Lithium Batteries. Novel solvents and additives for non-aqueous electrolytes protect electrodes and enable significantly higher operating voltage and number of charge/discharge cycles. TRL 4: Fully functioning prototypes using coin cell format.
- Longer Lasting Lithium/Oxygen Battery. A new non-aqueous electrolyte generating up to twice the specific capacity of current lithium/oxygen cells. Drop-in technology costs about 5% less than competing LiBF4 electrolyte. TRL 6: Fully functioning manufacturing prototype cells.
- Suite of innovations
- Examples above represent some of ARL’s available technologies addressing the DoD’s growing need for innovative power and energy solutions