Silicon-sulfur polymer, solid electrolyte and solid-state lithium-ion battery
AssigneeMicrovast Power Systems Co., Ltd.
InventorXiaoping Zhou
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Abstract
The present disclosure discloses a silicon-sulfur polymer, a solid electrolyte comprising the silicon-sulfur polymer, and a corresponding solid-state lithium-ion battery. The silicon-sulfur polymer of the present disclosure is a polymer compound comprising both an inorganic backbone-chain structure and an organic side-chain structure, and has the characteristics of both the organic polymer and the inorganic polymer as well as many unique properties. Therefore, the solid electrolyte formed by the silicon-sulfur polymer and the solid-state lithium-ion battery thereof have many good characteristics including a good lithium-ion-conduction capability, better thermal endurance, a wider range of operating temperatures, and better thermostability.
Claims20
A silicon-sulfur polymer for a solid electrolyte, comprising at least one structure unit as shown by Formula 1 or Formula 2:
- wherein R1 and R2 represent substituting groups which are respectively independently selected from alkyl, alkoxy, a polyether group and a terminal group with a —YA structure, at least one of the substituting groups R1 and R2 is the terminal group with the —YA structure, R3 represents alkyl or aryl, n is an integer greater than 1, and in the terminal group with the —YA structure, Y represents an anion and A represents a cation.
A preparation method of the silicon-sulfur polymer, wherein the silicon-sulfur polymer is prepared through a reaction of a silicon-containing polymeric monomer, a sulfur-containing polymeric monomer and an alkoxide in a solvent;
- the silicon-sulfur polymer comprises at least one structure unit as shown by Formula (1) or Formula (2):
- wherein R1 and R2 represent substituting groups which are respectively independently selected from alkyl, alkoxy, a polyether group and a terminal group with a —YA structure at least one of the substituting groups R1 and R2 is the terminal group with the —YA structure, R3 represents alkyl or aryl, n is an integer greater than 1, and in the terminal group with the —YA structure, Y represents an anion and A represents a cation.
Dependencies are inferred from the claim text.