Development of Li-rich Layered Cathode Nanomaterials for High Energy Li-ion Batteries

C. Tan
Aegis Technology, Inc,
United States

Keywords: Li-ion, battery, Li-rich, nanomaterial, high energy

Summary:

There is a great interest in developing energy storage systems based on more advanced lithium ion (Li-ion) battery technology, which has wide applications over the range from small portable electronics (cell phone, laptop) to large scale systems (HEV, storage of renewable energy). One of the key technologies of high energy Li-ion batteries is the more advanced cathode material (other important technologies include anode and electrolyte) with properties like high energy capacity, good cyclability, enhanced safety and low cost. This presentation is on the development of a novel class of Li-rich layered oxide cathode nanomaterials based on LixMn0.75Ni0.25O¬y (1.5≤x≤1.6, y=0.5x+1.75) with various doping/co-doping and surface coating/treatments for high-performance Li-ion battery applications. This type of cathode material is anticipated to provide high voltage, high capacity, high charging/discharging rate, good stability and low cost. A cost-effective, scalable synthesis process is employed to synthesize the cathodes. The influence of key parameters on cathodes morphology and performance, such as doping elements and doping levels, surface coating/treating materials, were investigated. Electrochemical tests were carried out to characterize the properties and performance of the resultant cathode materials. With the support from DoD/DoE SBIR programs on this project, Aegis Technology has established the capability in development and large scale production of advanced electrode nanomaterials for high performance Li-ion batteries.