Synthesis of single-crystal nickel-rich cathode materials using flame-assisted spray pyrolysis
AssigneeMassachusetts Institute of Technology
InventorsSili Deng, Jianan Zhang, Valerie L. Muldoon
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Abstract
A method of synthesis of single crystal nickel-rich cathode materials can include preparing a precursor solution by dissolving lithium nitrate, nickel nitrate, manganese nitrate, and cobalt nitrate in water, aerosolizing the solution of a) in a stream of air using an ultrasonic sprayer, preheating the resulting droplets, premixing the droplets with methane, decomposing the droplets by passing through a co-flow burner, depositing solid particles on a filter, and calcinating the solid particles in a furnace in oxygen to produce a single crystal cathode material.
Claims19
A method of synthesis of a single crystal nickel-rich cathode material comprising:
- a) forming droplets of a precursor solution comprising a nickel salt in a stream of air;
- b) preheating the droplets;
- c) generating a flame in a burner;
- d) decomposing the droplets by passing them through the burner;
- and
- e) calcinating the solid particles in a furnace in the presence of an oxidizing agent at a calcination temperature and for a calcination time to control the size and crystal structure of the single crystal nickel-rich cathode material,
- wherein preheating the droplets comprises exposing the droplets to a temperature of 125° C. to 325° C.
A method of synthesis of a single crystal nickel-rich cathode material comprising:
- a) preparing a precursor solution by dissolving lithium nitrate, nickel nitrate, manganese nitrate, and cobalt nitrate in water;
- b) aerosolizing the precursor solution in a stream of air using an ultrasonic sprayer to form droplets;
- c) preheating the droplets;
- d) generating a premixed methane flame in a burner;
- e) decomposing the droplets by passing them through the burner;
- f) depositing solid particles on a powder collector;
- and
- g) calcinating the solid particles in a furnace in the presence of an oxidizing agent to produce a single crystal cathode material of a controllable size and crystal structure by controlling the calcination time and calcination temperature,
- wherein preheating the droplets comprises exposing the droplets to a temperature of 125° C. to 325° C.
Dependencies are inferred from the claim text.