Patent application number | Description | Published |
20100086854 | FLUORINE DOPED LITHIUM RICH METAL OXIDE POSITIVE ELECTRODE BATTERY MATERIALS WITH HIGH SPECIFIC CAPACITY AND CORRESPONDING BATTERIES - Lithium rich metal oxyfluorides are described with high specific capacity and, good cycling properties. The materials have particularly good high rate capabilities. The fluorine dopant can be introduced in a low temperature process to yield the materials with desirable cycling properties. In some embodiments, the positive electrode active materials have a composition represented approximately by the formula Li | 04-08-2010 |
20110052981 | LAYER-LAYER LITHIUM RICH COMPLEX METAL OXIDES WITH HIGH SPECIFIC CAPACITY AND EXCELLENT CYCLING - Lithium rich and manganese rich lithium metal oxides are described that provide for excellent performance in lithium-based batteries. The specific compositions can be engineered within a specified range of compositions to provide desired performance characteristics. Selected compositions can provide high values of specific capacity with a reasonably high average voltage. Compositions of particular interest can be represented by the formula, xLi | 03-03-2011 |
20110052989 | LITHIUM DOPED CATHODE MATERIAL - Lithium dopant is introduced into lithium rich high capacity positive electrode active materials as a substitution for manganese within the complex metal oxides. In some embodiments, the lithium doped compositions can be written in a two component notation as x.Li | 03-03-2011 |
20110076556 | METAL OXIDE COATED POSITIVE ELECTRODE MATERIALS FOR LITHIUM-BASED BATTERIES - Positive electrode active materials are formed with various metal oxide coatings. Excellent results have been obtained with the coatings on lithium rich metal oxide active materials. Surprisingly improved results are obtained with metal oxide coatings with lower amounts of coating material. High specific capacity results are obtained even at higher discharge rates. | 03-31-2011 |
20110111294 | High Capacity Anode Materials for Lithium Ion Batteries - High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored. | 05-12-2011 |
20110111298 | COATED POSITIVE ELECTRODE MATERIALS FOR LITHIUM ION BATTERIES - High specific capacity lithium rich lithium metal oxide materials are coated with inorganic compositions, such as metal fluorides, to improve the performance of the materials as a positive electrode active material. The resulting coated material can exhibit an increased specific capacity, and the material can also exhibit improved cycling. The materials can be formed while maintaining a desired relatively high average voltage such that the materials are suitable for the formation of commercial batteries. Suitable processes are described for the synthesis of the desired coated compositions that can be adapted for commercial production. | 05-12-2011 |
20110236751 | HIGH VOLTAGE BATTERY FORMATION PROTOCOLS AND CONTROL OF CHARGING AND DISCHARGING FOR DESIRABLE LONG TERM CYCLING PERFORMANCE - Improved cycling of high voltage lithium ion batteries is accomplished through the use of a formation step that seems to form a more stable structure for subsequent cycling and through the improved management of the charge-discharge cycling. In particular, the formation charge for the battery can be performed at a lower voltage prior to full activation of the battery through a charge to the specified operational voltage of the battery. With respect to management of the charging and discharging of the battery, it has been discovered that for the lithium rich high voltage compositions of interest that a deeper discharge can preserve the cycling capacity at a greater number of cycles. Battery management can be designed to exploit the improved cycling capacity obtained with deeper discharges of the battery. | 09-29-2011 |
20110244331 | DOPED POSITIVE ELECTRODE ACTIVE MATERIALS AND LITHIUM ION SECONDARY BATTERY CONSTRUCTED THEREFROM - Positive electrode active materials comprising a dopant in an amount of 0.1 to 10 mole percent of Mg, Ca, Sr, Ba, Zn, Cd or a combination thereof are described that have high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li | 10-06-2011 |
20120070725 | METAL HALIDE COATINGS ON LITHIUM ION BATTERY POSITIVE ELECTRODE MATERIALS AND CORRESPONDING BATTERIES - Lithium ion battery positive electrode material are described that comprise an active composition comprising lithium metal oxide coated with an inorganic coating composition wherein the coating composition comprises a metal chloride, metal bromide, metal iodide, or combinations thereof. Desirable performance is observed for these coated materials. In particular, the non-fluoride metal halide coatings are useful for stabilizing lithium rich metal oxides. | 03-22-2012 |
20120105007 | LITHIUM ION BATTERIES WITH SUPPLEMENTAL LITHIUM - Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt. | 05-03-2012 |
20120107680 | Lithium Ion Batteries with Supplemental Lithium - Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt. | 05-03-2012 |
20130142944 | POSITIVE ELECTRODE MATERIALS FOR LITHIUM ION BATTERIES HAVING A HIGH SPECIFIC DISCHARGE CAPACITY AND PROCESSES FOR THE SYNTHESIS OF THESE MATERIALS - Positive electrode active materials are described that have a very high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li | 06-06-2013 |
20130149609 | LITHIUM METAL OXIDES WITH MULTIPLE PHASES AND STABLE HIGH ENERGY ELECTROCHEMICAL CYCLING - Electrochemically active material comprising a lithium metal oxide composition approximately represented by the formula Li | 06-13-2013 |
20130189575 | POROUS SILICON BASED ANODE MATERIAL FORMED USING METAL REDUCTION - A porous silicon based material comprising porous crystalline elemental silicon formed by reducing silicon dioxide with a reducing metal in a heating process followed by acid etching is used to construct negative electrode used in lithium ion batteries. Gradual temperature heating ramp(s) with optional temperature steps can be used to perform the heating process. The porous silicon formed has a high surface area from about 10 m | 07-25-2013 |
20130202953 | MIXED PHASE LITHIUM METAL OXIDE COMPOSITIONS WITH DESIRABLE BATTERY PERFORMANCE - Mixed phase complex lithium metal oxides are described with an overall stoichiometry represented by a formula Li | 08-08-2013 |
20130216701 | POSITIVE ELECTRODE MATERIALS FOR HIGH DISCHARGE CAPACITY LITHIUM ION BATTERIES - Positive electrode active materials are described that have a high tap density and high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li | 08-22-2013 |
20130216900 | LAYER-LAYER LITHIUM RICH COMPLEX METAL OXIDES WITH HIGH SPECIFIC CAPACITY AND EXCELLENT CYCLING - Lithium rich and manganese rich lithium metal oxides are described that provide for excellent performance in lithium-based batteries. The specific compositions can be engineered within a specified range of compositions to provide desired performance characteristics. Selected compositions can provide high values of specific capacity with a reasonably high average voltage. Compositions of particular interest can be represented by the formula, x Li | 08-22-2013 |
20130295439 | BATTERY CELL ENGINEERING AND DESIGN TO REACH HIGH ENERGY - Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge. | 11-07-2013 |
20140050972 | LITHIUM ION BATTERIES WITH HIGH ENERGY DENSITY, EXCELLENT CYCLING CAPABILITY AND LOW INTERNAL IMPEDANCE - Batteries with particularly high energy capacity and low internal impedance have been described herein. The batteries can exhibit extraordinary long cycling with acceptable low amounts of fade. Pouch batteries using high specific capacity lithium rich metal oxide as positive electrode material combined with graphitic carbon anode can reach an energy density of at least about 180 Wh/kg at a rate of C/3 from 4.35V to 2V at room temperature while having a room temperature areas specific DC resistance of no more than about 75 ohms-cm | 02-20-2014 |
20140178760 | HIGH CAPACITY CATHODE MATERIAL WITH STABILIZING NANOCOATINGS - A positive electrode active material comprising a lithium rich metal oxide active composition coated with aluminum zinc oxide coating composition is disclosed. The aluminum zinc oxide can be represented by the formula Al | 06-26-2014 |
20140234716 | LAYER-LAYER LITHIUM RICH COMPLEX METAL OXIDES WITH HIGH SPECIFIC CAPACITY AND EXCELLENT CYCLING - Lithium rich and manganese rich lithium metal oxides are described that provide for excellent performance in lithium-based batteries. The specific compositions can be engineered within a specified range of compositions to provide desired performance characteristics. Selected compositions can provide high values of specific capacity with a reasonably high average voltage. Compositions of particular interest can be represented by the formula, x Li | 08-21-2014 |
20140308585 | SILICON-BASED ACTIVE MATERIALS FOR LITHIUM ION BATTERIES AND SYNTHESIS WITH SOLUTION PROCESSING - Silicon based anode active materials are described for use in lithium ion batteries. The silicon based materials are generally composites of nanoscale elemental silicon with stabilizing components that can comprise, for example, silicon oxide-carbon matrix material, inert metal coatings or combinations thereof. High surface area morphology can further contribute to the material stability when cycled in a lithium based battery. In general, the material synthesis involves a significant solution based processing step that can be designed to yield desired material properties as well as providing convenient and scalable processing. | 10-16-2014 |