JP2009054286A5

JP2009054286A5 -

Info

Publication number: JP2009054286A5
Application number: JP2007216864A
Authority: JP
Filing date: 2007-08-23
Publication date: 2010-09-30

Claims

An electrolyte is provided together with the positive electrode and the negative electrode ,
The electrolytic solution includes a nonaqueous solvent containing an organic cyclic silicon compound having a structure represented by Chemical Formula 1 ,
Secondary battery.

(R1 and R2 are an alkyl group having 1 to 4 carbon atoms, an alkenyl group or aryl group having 2 to 4 carbon atoms, or a halogenated group thereof.)

At least a kind, secondary battery according to claim 1, wherein in the organic cyclic silicon compound, a compound represented by Formula 2 and Formula 3 having a structure shown in the formula 1.

(R11 and R12 are an alkyl group having 1 to 4 carbon atoms, an alkenyl group or aryl group having 2 to 4 carbon atoms, or a halogenated group thereof. R13 is an alkylene group having 2 to 4 carbon atoms, These are alkenylene groups having 2 to 4 carbon atoms, divalent groups having an aromatic ring, halogenated groups thereof, or derivatives thereof.

(R21 to R24 are an alkyl group having 1 to 4 carbon atoms, an alkenyl group or aryl group having 2 to 4 carbon atoms, or a halogenated group thereof. R25 and R26 are alkylene having 1 to 4 carbon atoms. Group, an alkenylene group having 2 to 4 carbon atoms, a divalent group having an aromatic ring, or a halogenated group thereof.)

The content of the organic cyclic silicon compound having a structure shown in the formula 1 in the non-aqueous solvent is not more than 10 wt% 0.01 wt%, the secondary battery according to claim 1, wherein.

The nonaqueous solvent contains a cyclic carbonate having an unsaturated bond, a secondary battery according to claim 1, wherein.

The nonaqueous solvent contains at least one selected from the group consisting of cyclic carbonates having halogen represented by chain carbonic ester and of 5 with a halogen represented by the formula 4, according to claim 1, wherein Secondary battery.

(R31 to R36 are a hydrogen group, a halogen group, an alkyl group or a halogenated alkyl group, and at least one of them is a halogen group or a halogenated alkyl group.)

(R41 to R44 are a hydrogen group, a halogen group, an alkyl group or a halogenated alkyl group, and at least one of them is a halogen group or a halogenated alkyl group.)

The chain carbonate having a halogen shown in Chemical Formula 4 is at least one of bis (fluoromethyl) carbonate and fluoromethylmethyl carbonate, and the cyclic carbonate having a halogen shown in Chemical Formula 5 is 4 The secondary battery according to claim 5 , which is at least one of —fluoro-1,3-dioxolan-2-one and 4,5-difluoro-1,3-dioxolan-2-one.

The nonaqueous solvent contains sultone secondary battery according to claim 1, wherein.

The nonaqueous solvent contains an acid anhydride, a secondary battery according to claim 1, wherein.

At least one selected from the group consisting of lithium hexafluorophosphate (LiPF ₆ ) , lithium tetrafluoroborate (LiBF ₄ ) , lithium perchlorate (LiClO ₄ ), and lithium hexafluoroarsenate (LiAsF ₆ ) an electrolyte salt containing secondary battery according to claim 1, wherein.

Including at least one electrolyte salt containing secondary battery according to claim 1, wherein one of the group consisting of compounds of 6, represented by Formula 7 and Formula 8.

(X51 is a 1A group element or 2A group element or aluminum in the short period type periodic table. M51 is a transition metal, or a 3B group element, 4B group element or 5B group element in the short period type periodic table. R51 is R51. Y51 is —OC—R52—CO—, —OC—CR53 ₂ — or —OC—CO—, wherein R52 is an alkylene group, a halogenated alkylene group, an arylene group or a halogenated arylene group. R53 is an alkyl group, a halogenated alkyl group, an aryl group or a halogenated aryl group, wherein a5 is an integer of 1 to 4, b5 is an integer of 0, 2 or 4, c5, d5, m5 and n5 are integers of 1 to 3.)

(X61 is a group 1A element or a group 2A element in the short period type periodic table. M61 is a transition metal, or a group 3B element, a group 4B element, or a group 5B element in the short period type periodic table. Y61 is —OC—. _{_{(CR61 2) b6 -CO -,}} - R63 2 C- (CR62 2) c6 -CO -, - R63 2 C- (CR62 2) c6 -CR63 2 -, - R63 2 C- (CR62 2) c6 -SO ₂ —, —O ₂ S— (CR62 ₂ ) _d6 —SO ₂ — or —OC— (CR62 ₂ ) _d6 —SO2 —, wherein R61 and R63 are hydrogen, alkyl, halogen or alkyl halide. At least one of which is a halogen group or a halogenated alkyl group, and R62 is a hydrogen group, an alkyl group, a halogen group, or a halogenated alkyl group. A6, e6 and n6 are integers of 1 or 2, b6 and d6 are integers of 1 to 4, c6 is an integer of 0 to 4, and f6 and m6 are integers of 1 to 3. )

(X71 is a group 1A element or a group 2A element in the short period type periodic table. M71 is a transition metal, or a group 3B element, a group 4B element, or a group 5B element in the short period type periodic table. Rf is a fluorinated alkyl. Or a fluorinated aryl group, each having 1 to 10 carbon atoms, Y71 is —OC— (CR71 ₂ ) _d7 —CO—, —R72 ₂ C— (CR71 ₂ ) _d7 —CO—, —R72 _{_{_{2 C- (CR71 2) d7 -CR72}}} 2 -, - R72 2 C- (CR71 2) d7 -SO 2 -, - O 2 S- (CR71 2) e7 -SO 2 - or -OC- (CR712) e7 —SO 2 —, wherein R 71 is a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group, R 72 is a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group, At least one of them is a halogen group or a halogenated alkyl group, wherein a7, f7 and n7 are integers of 1 or 2, b7, c7 and e7 are integers of 1 to 4, and d7 is 0. -4 is an integer, and g7 and m7 are integers of 1-3.)

The compound represented by Chemical Formula 6 is at least one of the group consisting of compounds represented by Chemical Formula 9 , and the compound represented by Chemical Formula 7 is one of the groups consisting of compounds represented by Chemical Formula 10 is at least one, the compound shown in the formula 8 is a compound represented by chemical formula 11, a secondary battery according to claim 10, wherein.

Including at least one electrolyte salt containing secondary battery according to claim 1, wherein one of the reduction 12, the group consisting of compounds represented by Formula 13 and Formula 14.

(M and n are integers of 1 or more.)

(R81 is a linear or branched perfluoroalkylene group having 2 to 4 carbon atoms.)

(P, q and r are integers of 1 or more.)

The negative electrode is a negative electrode active material containing a carbon material, lithium metal (Li), or a material that can occlude and release lithium and has at least one of a metal element and a semi-metal element. including secondary battery according to claim 1, wherein.

The negative electrode, elemental silicon (Si), alloys and compounds, as well as simple substance of tin (Sn), including a negative electrode active material containing at least one selected from the group consisting of alloys and compounds, according to claim 1, wherein two Next battery.

The negative electrode has a negative electrode active material layer on a negative electrode current collector, and the negative electrode active material layer is formed by at least one method selected from the group consisting of a vapor phase method, a liquid phase method, and a firing method. The secondary battery according to claim 1 .

The secondary battery according to claim 1, which is a lithium ion secondary battery.

An electrolytic solution for a secondary battery , comprising a nonaqueous solvent containing an organic cyclic silicon compound having a structure represented by Chemical Formula 1.