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US 8,940,439 B2Granted
Secondary battery, electronic device, electric power tool, electrical vehicle, and electric power storage system
AssigneeSony Corporation
InventorsAtsumichi Kawashima, Hiroshi Imoto, Tomoyuki Shiratsuchi, Takuma Sakamoto, Naoto Ueda, Atsushi Nishimoto, Tadahiko Kubota, Masayuki Ihara
Life of this patent
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Abstract
A secondary battery capable of suppressing resistance rise even after repeated charge and discharge is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode contains titanium-containing lithium composite as an anode active material, and the electrolytic solution contains cyclic disulfonic acid anhydride.
Claims13
A secondary battery comprising:
- a cathode;
- an anode;
- and
- an electrolytic solution,
- wherein the anode contains one or more of titanium-containing lithium composite oxides expressed by the following Formula 1 to Formula 3 as an anode active material, and
- the electrolytic solution contains cyclic disulfonic acid anhydride expressed by the following Formula 4 or cyclic disulfonic acid anhydride expressed by the following Formula 5 or both:
- Li[LixM1(1−3x)/2Ti(3+x)/2]O4 Formula 1
- where M1 is one or more of Mg, Ca, Cu, Zn, and Sr, and x satisfies 0≦x≦⅓:
- Li[LiyM21−3yTi1+2y]O4 Formula 2
- where M2 is one or more of Al, Sc, Cr, Mn, Fe, Ga, and Y, and y satisfies 0≦y≦⅓:
- Li[Li1/3M3zTi(5/3)−z]O4 Formula 3
- where M3 is one or more of V, Zr, and Nb, and z satisfies 0≦z≦⅔:
- where R1 to R4 are an alkyl group (CmH2m+1:
- m satisfies 0≦m≦4):
- where R5 to R10 are an alkyl group (CnH2n+1:
- n satisfies 0≦n≦4).
13 more elements
Dependencies are inferred from the claim text.