Vorbeck, in partnership with Pacific Northwest Nationals Laboratory (PNNL) and Princeton University, is working to rapidly commercialize next generation lithium ion batteries incorporating Vorbeck's Vor-x® graphene technology. The unique properties of Vor-x® have advanced the limit of what is feasible for lithium battery energy storage, producing dramatically increased battery capacity, longer cycle life, and twice as much power at high charge/discharge rates.
Graphene offers exceptional advantages as an electrode material because it is strong, thin and highly conductive. The unique surface chemistry of Vorbeck's graphene technology, Vor-x® maximizes these advantages by maintaining the material in single sheet form, rather than restacking into nanographene platelets. Using Vor-x®, PNNL and Princeton have developed straightforward solutions for preparing graphene-based composites for electrode materials, producing record-breaking performance improvements. These innovations using Vor-x® will enable dramatic improvement in the performance of batteries for transportation as well as consumer electronics. brochure>>
Vor-charge™ Lithium-ion Anodes
Vor-charge™ graphene composite anode is a fully formulated anode composite with Li-ion storage material and graphene intimately mixed. The highly conductive anode leads to less internal resistance and low temperatures during rapid charge and discharge. Vor-charge™ offers long cycle life as there is no graphite particle fragmentation and loss of capacity due to large volume expansion and contraction. Vorbeck has teamed with Targray Technology International as the distributor for Vor-charge™ anode materials.
Next Generation Lithium Battery Chemistries
Lithium Sulfur. Utilizes a three-dimensional sandwich-type architecture containing layers of
Vor-x® graphene sheets and sulfur nanoparticles as the cathode material or lithium-sulfur batteries.
Sulfur sandwiched between Vor-x® sheets provides good physical and electrical contact between sulfur and graphene
Intimate mixing provides fast electron and ionic transfer resulting in much higher reversible capacity at fast charge/discharge rates
Structure combined with special inhibitors slows down polysulfide dissolution and shuttle loss thus improving cycle life. >70% capacity retention over 100 cycles.
Demonstrated >800 mAh/g reversible capacity (based on total cathode weight)
Lithium Air. Utilizes Vor-x® graphene sheets with specifically designed chemical modification arranged in a unique three-dimensional air electrode with bimodal porous structure.
Air electrode consists of interconnected pore channels on both the micro- and nanometer length scales.
The microporous channels supply oxygen to the interior parts of air electrode during discharge
The small pores provide a high density of reactive sites for electrochemical reactions
Use of Vor-x® graphene with designed surface chemistry promotes formation of isolated nanosized Li2O2 particles (rather than large particulates)
Prevent air blocking in the air electrode increasing lifetime.
Limited size and thickness of reaction products may improve rechargeability. Secondary rechargeable batteries in development.
Pouch Cell Prototypes: Capacity >15,000 mAh/g demonstrated in air atmosphere; >5,000 mAh/g when operated in ambient air environment