Nonaqueous electrolyte cell with improved high temperature characteristics
A non-aqueous electrolyte cell that excels in the high-temperature cycle characteristics and that is without the possibility of solution leakage. The non-aqueous electrolyte cell includes a polymer electrolyte. This polymer electrolyte is a polymerization of a prepolymer included in a prepolymer electrolyte that includes a non-aqueous solvent, an electrolyte salt, and the prepolymer. The prepolymer includes a polyester-based monomer. The polymer electrolyte further includes a vinylene carbonate derivative and cyclic acid anhydride.
1. A non-aqueous electrolyte cell comprising:
a positive electrode;
a negative electrode; and
a polymer electrolyte, wherein:
the polymer electrolyte is formed from a prepolymer electrolyte having a prepolymer wherein the prepolymer is polymerized, the prepolymer electrolyte further comprising a non-aqueous solvent and an electrolyte salt;
the prepolymer includes a polyester-based monomer; and
the prepolymer electrolyte further includes a vinylene carbonate derivative and cyclic acid anhydride, said cyclic acid anhydride is a component separate from the polyester-based monomer;
wherein the polyester-based monomer is at least one selected from the group consisting of the following formulas 1,2,3,3′,3″ and 4;
CH2═CR—CO—(O—A1-CO) m -O—R1 Formula 1
R:H, R1:CH 3 ,A1:C 5 H 10 , m =6;
CH 2 ═CR2—CO—(O-A2-CO) m 1-CH 2 —CH 2 —(O-A2-CO) m 1-CO—CR2═CH 2 Formula 2
R2:H,A2:C 5 H 10 ,m 1=4;
2. The non-aqueous electrolyte cell according to claim 1 , wherein the cyclic acid anhydride is a compound represented by the following Formula 10:
where n=0 to 4; R1, R2, R3, and R4 are independently a hydrogen atom, a straight chained or branched alkyl group, an alkenyl group, or an aryl group; and R5 and R6are independently a hydrogen atom or a straight chained or branched alkyl group with four or less carbon atoms in every repeat unit.
3. The non-aqueous electrolyte cell according to claim 1 , wherein an active material for the negative electrode is a carbonaceous substance with a d(002) value of 0.340 nm or lower.
4. The non-aqueous electrolyte cell according to claim 1 , wherein the prepolymer further includes polyether acrylate and/or polyether methacrylate.
5. The non-aqueous electrolyte cell according to claim 1 , wherein an added amount of the cyclic acid anhydride is 0.5-2.0% by weight.