Envia Systems, Inc.

Zenlabs Energy, Inc.

Ionblox, Inc.

Charles A Bowling

Sujeet Kumar

Herman Adrian Lopez

Subramanian Venkatachalam

Bing Li

Sanjeev Sharma

Deepak Kumaar K Karthikeyan

Pedro A Hernández Gallegos

Shabab Amiruddin

Deepak Kumaar Karthikeyan

Yezi Bei

A composite coated form of lithium cobalt oxide is described that can achieve improved cycling at higher voltages. Liquid phase and combined liquid and solid phase coating processes are described to effectively form the composite coated powders. The improved cycling positive electrode materials can be effectively combined with either graphitic carbon negative electrode active materials or silicon based high capacity negative electrode active materials. Improved battery designs can achieve very high volumetric energy densities in practical battery formats and with reasonable cycling properties.

Positive electrode active materials with composite coatings for high energy density secondary batteries and corresponding processes

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 AlZnO, where x is from about 0.01 to about 0.6. In some embodiments, the material can have an average voltage that is very stable with cycling, and a specific capacity of at least about 175 mAh/g and an average voltage of at least about 3.55V discharged at a rate of C/3 from 4.6V to 2V against lithium. The material can further comprise an overcoat of metal halide over the aluminum zinc oxide coating. In some embodiments, the material can have from about 1 mole percent to about 15 mole percent aluminum zinc oxide coating and from about 0.5 mole percent to about 3 mole percent aluminum halide overcoat.

High capacity cathode material with stabilizing nanocoatings

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-cmat 20% SOC based on a full charge to 4.35V. High specific capacity lithium rich metal oxide with specific stoichiometry ranges used in these batteries are disclosed.

Lithium ion batteries with high energy density, excellent cycling capability and low internal impedance

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Palo Alto, CA, United States of America

Charles A Bowling