High power electrode materials
AssigneeA123 Systems, Inc.
InventorsLarry Beck, Jennifer Wilson, Chuanjing Xu, Zhong-You Shi, Maha Hammoud
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Abstract
An LFP electrode material is provided which has improved impedance, power during cold cranking, rate capacity retention, charge transfer resistance over the current LFP based cathode materials. The electrode material comprises crystalline primary particles and secondary particles, where the primary particle is formed from a plate-shaped single-phase spheniscidite precursor and a lithium source. The LFP includes an LFP phase behavior where the LFP phase behavior includes an extended solid-solution range.
Claims15
1-46. (canceled)
An electrode material for use in a battery comprising:
- primary particles and secondary particles, wherein the primary particles are formed from a spheniscidite precursor and a lithium source;
- and
- wherein the spheniscidite precursor is synthesized at a temperature in a range of 85-95° C., and the spheniscidite precursor has a surface area ranging from 20 m2/g to 25 m2/g.
An electrochemical cell comprising:
- a negative electrode capable of intercalating and liberating lithium;
- a positive electrode comprising an electrode material having crystalline primary particles formed from a spheniscidite precursor and a lithium source;
- a nonaqueous electrolyte solution;
- a separator;
- a container housing the said negative electrode, positive electrode, nonaqueous electrolyte solution, and separator;
- and
- wherein the spheniscidite precursor is synthesized at a temperature in a range of 85-95° C., and the spheniscidite precursor has a surface area ranging from 20 m2/g to 25 m2/g.
Dependencies are inferred from the claim text.