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Advanced Battery Technologies

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.

BENEFITS/ADVANTAGES:

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.

Additional Details

Owner

Department of Defense

Intellectual Property Protection

Pending Patent

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