Electrolyte composition
The invention relates to an electrolyte composition, comprising a polyether polymer, a polyethylene oxide, and a redox pair and optionally nano-particles.
1. An electrolyte composition, comprising:
(a) polyethylene oxide;
(b) polyether polymer; and
(c) a redox pair,
wherein the polyether polymer is selected from the group consisting of a polyether urethane having a structure of the following formula (I) and a phosphorus-containing polyether having a structure of the following formula (II):
wherein R is aryl or C 3-6 cycloalkyl, n is an integer of 2 to 4, m is an integer of 6 to 100, and k is an integer of 2 to 4; and
wherein i is an integer of 2 to 4, and j is an integer of 6 to 100.
2. The electrolyte composition of claim 1 , wherein k is 2, and the polyether urethane has a structure of formula (I 1 ):
wherein n is an integer of 2 to 4, and m is an integer of 6 to 100.
3. The electrolyte composition of claim 2 , wherein m is an integer of 6 to 50.
4. The electrolyte composition of claim 2 , wherein n is 2.
5. The electrolyte composition of claim 1 , wherein j is an integer of 6 to 50.
6. The electrolyte composition of claim 1 , further comprising nano-particles.
7. The electrolyte composition of claim 6 , wherein the nano-particles are selected from the group consisting of silicon dioxide, aluminum oxide, cadmium sulfide, zirconium oxide, calcium phosphate, calcium oxide, titanium dioxide, and zinc oxide.
8. The electrolyte composition of claim 7 , wherein the nano-particles are silicon oxide, titanium dioxide, or a mixture thereof.
9. The electrolyte composition of claim 7 , wherein the nano-particles are silicon oxide.
10. The electrolyte composition of claim 6 , wherein the nano-particles have a diameter of about 1 to 50 nm.
11. The electrolyte composition of claim 1 , wherein the weight ratio of the polyethylene oxide to the polyether polymer is 0.2:1 to 3:1.
12. The electrolyte composition of claim 1 , wherein the weight ratio of the polyethylene oxide to the polyether polymer is 0.5:1 to 2:1.
13. The electrolyte composition of claim 1 , wherein the redox pair is I 3 − /I − , Br − /Br 2 , SCN − /(SCN) 2 , or SeCN − /(SeCN) 2 .
14. The electrolyte composition of claim 13 , wherein the redox pair is I 3 − /I − .