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Lithium-ion batteries with intrinsic pulse overcharge protection

Patent ·
OSTI ID:1083226
;

The present invention relates in general to the field of lithium rechargeable batteries, and more particularly relates to the positive electrode design of lithium-ion batteries with improved high-rate pulse overcharge protection. Thus the present invention provides electrochemical devices containing a cathode comprising at least one primary positive material and at least one secondary positive material; an anode; and a non-aqueous electrolyte comprising a redox shuttle additive; wherein the redox potential of the redox shuttle additive is greater than the redox potential of the primary positive material; the redox potential of the redox shuttle additive is lower than the redox potential of the secondary positive material; and the redox shuttle additive is stable at least up to the redox potential of the secondary positive material.

Research Organization:
ANL (Argonne National Laboratory (ANL), Argonne, IL (United States))
Sponsoring Organization:
USDOE
DOE Contract Number:
W-31109-ENG-38
Assignee:
U Chicago Argonne LLC (Chicago, IL)
Patent Number(s):
8,367,253
Application Number:
11/345,947
OSTI ID:
1083226
Country of Publication:
United States
Language:
English

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