Stable cycling of lithium sulfide cathodes through strong affinity with multifunctional binders
View Patent ↗A manufacturing method of a battery electrode includes: (1) mixing Li 2 S particles with a binder to form a slurry, the binder including at least one of: (a) an ester moiety, (b) an amide moiety, (c) a ketone moiety, (d) an imine moiety, (e) an ether moiety, and (f) a nitrile moiety; and (2) disposing the slurry on a current collector.
1. A manufacturing method of a battery electrode, comprising:
mixing Li 2 S particles with a binder to form a slurry; and
disposing the slurry on a current collector, wherein the binder includes a polymer represented as follows:
—(CH 2 —CHR) n —
where n is greater than 1, R is a side group selected from —(C═O)—O—R 1 , -L-(C═O)—O—R 1 , and -L-O—(C═O)—R 1 , where R 1 is an alkyl including 1 carbon atom or 2 carbon atoms, and L is an alkylene including 1 carbon atom or 2 carbon atoms.
2. A manufacturing method of a battery electrode, comprising:
mixing Li 2 S particles with a binder to form a slurry; and
disposing the slurry on a current collector, wherein the binder includes a polymer represented as follows:
—(CH 2 —CHR) n —
where n is greater than 1, R is an acyclic side group selected from —NR 2 —(C═O)—R 3 , -L-(C═O)—NR 2 R 3 , and -L-NR 2 —(C═O)—R 3 , where R 2 and R 3 are independently selected from hydrogen and alkyls including 1 carbon atom or 2 carbon atoms, and L is an alkylene including 1 carbon atom or 2 carbon atoms.
3. A manufacturing method of a battery electrode, comprising:
mixing Li 2 S particles with a binder to form a slurry; and
disposing the slurry on a current collector, wherein the binder includes a polymer represented as follows:
—(CH 2 —CHR) n —
where n is greater than 1, R is a side group selected from —(C═O)—R 4 and -L- (C═O)—R 4 , where R 4 is an alkyl including 1 carbon atom or 2 carbon atoms, and L is an alkylene including 1 carbon atom or 2 carbon atoms.
4. The manufacturing method of any one of claims 1 - 3 , wherein the Li 2 S particles have sizes in the sub-micron range.
5. The manufacturing method of any one of claims 1 - 3 , wherein the polymer has a number average molecular weight of at least 500,000 g/mol.
6. A battery electrode comprising:
a current collector; and
a cathode material coated on the current collector, the cathode material including a sulfur-containing active material dispersed with a binder, the binder including a polymer including an acyclic side group selected from:
(1) —(C═O)—O—R 1 , where R 1 is selected from alkyls including 2 to 10,
(2) —O—(C═O)—R 1 , where R 1 is selected from alkyls including 2 to 10 carbon atoms,
(3) -L-(C═O)—O—R 1 , where R 1 is selected from alkyls including 1 to 10 carbon atoms, and L is a linker moiety selected from alkylenes including 1 to 10 carbon atoms,
(4) -L-O—(C═O)—R 1 , where R 1 is selected from alkyls including 1 to 10 carbon atoms, and L is a linker moiety selected from alkylenes including 1 to 10 carbon atoms,
(5) —NR 2 —(C═O)—R 3 , where R 2 and R 3 are independently selected from hydrogen and alkyls including 1 to 10 carbon atoms,
(6) -L-(C═O)—NR 2 R 3 , where R 2 and R 3 are independently selected from hydrogen and alkyls including 1 to 10 carbon atoms, and L is a linker moiety selected from alkylenes including 1 to 10 carbon atoms,
(7) -L-NR 2 —(C═O)—R 3 , where R 2 and R 3 are independently selected from hydrogen and alkyls including 1 to 10 carbon atoms, and L is a linker moiety selected from alkylenes including 1 to 10 carbon atoms,
(8) —(C═O)—R 4 , where R 4 is selected from alkyls including 1 to 10 carbon atoms, and
(9) -L-(C═O)—R 4 , where R 4 is selected from alkyls including 1 to 10 carbon atoms, and L is a linker moiety selected from alkylenes including 1 to 10 carbon atoms.