Slot electrode stack and electrochemical cells and batteries containing a slot electrode stack
AssigneeAdvanced Cell Engineering, Inc.
InventorsJohn Kaufman, Karim Zaghib, Ayyakkannu Manivannan, Thomas Madden
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Abstract
The disclosure provides a slot electrode stack including an electrically insulative separator folded into an accordion shape and having a plurality of first slots on one side and a plurality of second slots on an opposite side, a plurality of cathodes located in the plurality of first slots, and a plurality of anodes located in the plurality of second slots. The disclosure further provides a slot electrode cell including such a slot electrode stack and a slot electrode battery including at least one such slot electrode cell. The disclosure further provides a method of forming a slot electrode stack.
Claims24
A slot electrode stack comprising:
- an electrically insulative separator folded into an accordion shape and having a plurality of first slots on one side and a plurality of second slots on an opposite side;
- a plurality of uncycled cathodes located in the plurality of first slots, wherein the plurality of uncycled cathodes comprise a cathode active material comprising a lithium manganese iron phosphate (LMFP) cathode active material, a lithium manganese nickel iron phosphate (LMNFP) cathode active material, a lithium iron phosphate (LFP) cathode active material, a lithium iron cobalt phosphate (LFCP) cathode active material, a lithium iron manganese cobalt phosphate (LFMCP) cathode active material, or any combinations thereof.
- wherein:
- the LMFP cathode active material has the general chemical formula LiMnxFe1−-xPO4, wherein 0.01≤x≤0.95;
- the LMNFP cathode active material has the general chemical formula LiMnxNiyFe1−(x+y)PO4, wherein 0<x<1, 0<y<1 and x+y<1 and wherein the ratio of x:y is in a range between 5:1 and 1:5;
- the LFCP cathode active material has the general chemical formula LiFe1−xCoxPO4, in which 0<x<1;
- the LFMCP cathode active material has the general chemical formula LiFe1−(x+y)MnxCoyPO4, wherein 0<x<1, 0<y<1 and x+y<1 and wherein the ratio of x:y is in a range between 5:1 and 1:5;
- and
- wherein at least one of the LMFP, LMNFP, LFCP, LFMCP, or LFP is coated with conductive carbon;
- and
- a plurality of anodes located in the plurality of second slots.
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A slot electrode stack comprising:
- an electrically insulative separator folded into an accordion shape and having a plurality of first slots on one side and a plurality of second slots on an opposite side;
- a plurality of bipolar cathodes located in the plurality of first slots, wherein the plurality of bipolar cathodes comprise two different cathode active materials located in two distinct cathode layers on a single current collector,
- wherein:
- i) the two different cathode layers are disposed adjacent to one another, and the current collector is disposed adjacent to one cathode layer only;
- ii) the current collector is disposed adjacent to and between the two different cathode layers;
- iii) the two different cathode layers are both disposed adjacent to the current collector in different regions on a surface of the current collector;
- or
- iv) the cathode comprises two layers each of the distinct cathode layers in which, on one side of the current collector, the two different cathode layers are disposed adjacent to one another and the current collector is disposed adjacent to a first type of cathode layer only and, on an opposite side of the current collector, two different cathode layers are disposed adjacent to cone another and the current collector is disposed adjacent to the first type of cathode layer only;
- and
- wherein the two different cathode active materials are selected from:
- lithium nickel manganese cobalt oxide (NMC) in which nickel (Ni) is present in at least 50 wt % of the total weight of Ni, manganese (Mn), and cobalt (Co);
- lithium nickel cobalt aluminum oxide (NCA);
- lithium nickel manganese cobalt aluminum oxide (NMCA), lithium iron phosphate (LFP), lithium manganese iron phosphate (LMFP), lithium manganese nickel iron phosphate (LMNFP), lithium iron cobalt phosphate (LFCP), lithium iron manganese cobalt phosphate (LFMCP), and any combinations thereof;
- and
- a plurality of anodes located in the plurality of second slots.
Dependencies are inferred from the claim text.