Ionic and electronic conducting binder for electrochemical devices
AssigneeNissan North America, Inc.
InventorRameshwar Yadav
Life of this patent
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Abstract
An ion conducting and electron conducting polymer is comprised of a first polymer of a single-sulfonic acid polymer or a multi-sulfonic acid polymer and a second polymer of an EDOT analog monomer having the following formula: wherein z=O or S; Y2=—COH, —C6H13, or —COOH; a=0 or 1; Y3=—CH3, —C2H5, —CH2C6H6, —C6H13, —C8H17, —CH2OC6H13, or —CH2OC6H6; and b=0 or 1; wherein a sulfonic acid group of each branch of the first polymer electronically interacts with one or more thiophene rings of the second polymer; and wherein any remaining sulfonic acid groups on each branch of the first polymer are converted to SO3Li.
Claims21
A PEDOT:
- multi-lithium sulfonate polymer that is both ion conducting and electron conducting formed of A or formed of A and B:
- wherein R1 is a linear polymer portion and R2 is a branched polymer portion of a single-sulfonic acid polymer or a multi-sulfonic acid polymer, R3 represents a branch having sulfonic acids substituted with Li or an EDOT analog as depicted;
- r≥0;
- n>1;
- x>1;
- m=0, 1, 2 or 3 when A and B are present and m=1, 2 or 3 when only A is present;
- and p=1, 2 or 3;
- B is randomly located in the PEDOT:
- multi-lithium sulfonate polymer;
- z=O or S;
- Y2=—COH, —C6H13, or —COOH;
- a=0 or 1;
- Y3=—CH3, —C2H5, —CH2C6H6, —C6H13, —C8H17, —CH2OC6H13, or —CH2OC6H6;
- and b=0 or 1.
An ion conducting and electron conducting polymer comprised of a first polymer of a single-sulfonic acid polymer or a multi-sulfonic acid polymer and a second polymer of an EDOT analog monomer having the following formula:
- wherein:
- z=O or S;
- Y2=—COH, —C6H13, or —COOH;
- a=0 or 1;
- Y3=—CH3, —C2H5, —CH2C6H6, —C6H13, —C8H17, —CH2OC6H13, or —CH2OC6H6;
- and b=0 or 1;
- wherein a sulfonic acid group of some or all branches of the first polymer electronically interacts with one or more thiophene rings of the second polymer;
- and
- wherein all remaining sulfonic acid groups on each branch of the first polymer are converted to SO3Li.
A method of making a PEDOT:
- multi-lithium sulfonate polymer, comprising:
- polymerizing an EDOT analog monomer to form a PEDOT analog polymer;
- reacting the PEDOT analog polymer with a single-sulfonic acid polymer or a multi-sulfonic acid polymer, wherein a weight ratio of single-sulfonic acid polymer to PEDOT analog polymer is greater than 1.0 and a weight ratio of multi-sulfonic acid polymer to PEDOT analog polymer is greater than or equal to 1.0;
- ion exchanging hydrogen with lithium using LiOH or LiCl to convert —NH— to —NLi— and excess —SO3H to —SO3Li.
Dependencies are inferred from the claim text.