A cathode material

Abstract

A process for producing a lithium-manganese-rich layered oxide cathode material or a lithium-manganese-rich layered oxide cathode material precursor includes co-precipitating a dissolved Li compound and a dissolved Mn salt selected from the group consisting of Mn(CH3COO)2, Mn(NO3)2, MnSO4, and mixtures thereof, from an aqueous solution, in the presence of a precipitator which reacts at least withthe dissolved Mn salt to form a carbonate, thereby providing a precipitate which includes MnCO3 and a lithium compound as a lithium-manganese-rich layered oxide cathode material precursor. The invention extends to a lithium-manganese-rich layered oxide cathode material or a lithium-manganese-rich layered oxide cathode material precursor, to an electrochemical cell, and to methods of making and operating an electrochemical cell.

Description

technical field [0001] The present invention relates to a cathode material. Specifically, the present invention relates to a process for producing a lithium-manganese-rich layered oxide cathode material or a lithium-manganese-rich layered oxide cathode material precursor, a lithium-rich manganese-rich layered oxide cathode material produced by the process An oxide cathode material or a lithium manganese-rich layered oxide cathode material precursor, an electrochemical cell, a method of making an electrochemical cell, and a method of operating an electrochemical cell. Background technique [0002] Layered lithium-rich manganese metal oxide composites have emerged as promising candidates for cathode materials to achieve higher capacity (>200mAh / g), voltage stability, and good cycle life, thereby providing applications including but not limited to electric vehicles and hybrid vehicles. The wide application of automobiles provides the necessary power requirements. The opera...

AI Technical Summary

Problems solved by technology

Nevertheless, Li-Mn-rich layered oxide materials (such as Li-Mn-rich layered transition metal oxide composites) have complex structures, including some inherent defects: high initial irreversible charge capacity, capacity after long-term cycling Attenuation, poor continuous charge and discharge rate capability, and high reactivity with electrolyte at high voltage

In general, as noted above, commercially employed methods for preparing lithium-manganese-rich cathode materials suffer from a number of disadvantages, including being time-consuming (can take up to 72 hours) and involving multiple steps that can make large quantities of these materials Scale commercialization is not feasible

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