Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2000-07-20
2003-07-08
Ball, Michael W. (Department: 1733)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C524S401000, C429S188000, C252S062200
Reexamination Certificate
active
06589383
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to ionically conductive compositions containing a polymer and batteries using them. More specifically, the present invention relates to tonically conductive compositions containing a block polymer and batteries using them.
BACKGROUND OF THE INVENTION
Ionically conductive materials are used in various batteries and devices such as primary batteries, secondary batteries, solar cells, electrolytic condensers, sensors, electrochromic display devices, etc. In the field of the recent electronics industry, higher performance of various electronic components is constantly sought and their miniaturization and lamellation increasingly advance, so that proportional improvements are also desired in ionically conductive materials themselves used in batteries or devices. Ionically conductive materials conventionally used in the form of liquid or fluid have problems such as damage of peripheral parts due to leakage.
In order to address these problems, solid electrolyte materials such as polymer electrolytes or gel electrolytes have recently been proposed. These have excellent properties such as relatively high ionic conductivity, wide potential window, good film-forming properties, flexibility, light weight, elasticity, transparency, etc. Among these, flexibility, elasticity and the like which are unique to polymer electrolytes are especially important for lithium secondary batteries because many electrode active materials in the batteries change their volumes during operation and the properties of the polymer electrolytes serve to absorb such volume change. Moreover, polymer electrolytes and gel electrolytes are said to have the ability to prevent the loss of battery capacity or short of electrodes due to the defection of electrode materials during repeated use.
JP No. 61-23944/86B discloses a polyamide resin having one-dimensional structure as an organic polymer compound for use in such polymer electrolytes, but does not specifically disclose any polyamide resins.
Advanced Materials, 10, 439 (1998) Discloses
polyoxyethylenes; polyoxyethylene-polysiloxane complexes; polyoxyethylene-polyphosphazene complexes; crosslinked polymers having a polyoxyethylene in the structural unit and also having an epoxy or isocyanate group and a siloxane structure as a polymer electrolyte. Particularly, the crosslinked polymers having a polyoxyalkylene group and a polysiloxane structure are noticeable polymer electrolytes in terms of their excellent low-temperature characteristics.
As a polymer for such a polymer electrolyte having a polyoxyalkylene group and a polysiloxane structural unit, J. Polym. Sci. Polym. Lett. Ed., 22, 659 (1984) discloses:
Solid State Ionics, 15, 233 (1985) discloses:
JP No. 63-136409/88A discloses:
and JP No. 8-78053/96A discloses a silicone compound represented by the formula:
wherein A and A′ represents an alkyl group, and B and/or B′ represents an oxyalkylene chain. All these polymers have a polyoxyalkylene chain only in the side chain of the polysiloxane backbone.
JP No. 8-21389/96B discloses a crosslinked cured polysiloxane having an organic group containing an oxyalkylene group or a polyoxyalkylene group as a side chain and/or as a crosslinking moiety, and JP No. 6-35545/94B discloses a crosslinked cured polysiloxane represented by the formula:
wherein R
1
, R
2
, R
3
, R
11
and R
11′
represent an alkyl, alkoxyl or aryl group, R
4
represents an alkylene, oxyalkylene or oxycarbonylalkylene group, R
5
represents a hydrogen atom or an alkyl group, Y represents an oxyalkylene or polyoxyalkylne group, and Z represents a group having an oxyalkylene or polyoxyalkylene group or a polysiloxane structure at each end.
However, none of these have been practically applied to a polymer electrolyte because of problems of the stability of polymers themselves, unavailability of crosslinked structures capable of preventing the defection of electrode materials and allowing lamellation, insufficient ionic conductivity, etc.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an tonically conductive composition suitable for use in batteries and a battery containing it.
According to the first aspect of the present invention, an tonically conductive composition is provided, comprising:
a linear copolymer obtained by polymerizing compound (A) having two functional groups (a) and compound (B) having two functional groups (b) via the formation of a bond between said functional groups (a) and (b); and
an electrolyte.
The reaction for forming such a bond may be an addition reaction to an unsaturated group, a ring-opening reaction of an epoxy group, an addition reaction to an isocyanate or isothiocyanate, a condensation reaction or a reaction using an alkyl halide, preferably an addition reaction to an unsaturated group, a ring-opening reaction of an epoxy group, or an addition reaction to an isocyanate or isothiocyanate, more preferably an addition reaction of a hydrosilyl group to an unsaturated group.
When an addition reaction to an unsaturated group is used, examples of compound (A) include compounds represented by the formula:
wherein R
21
independently represents a hydrogen atom, a substituted or unsubstituted alkyl group containing 1 to 18 carbon atoms, or a substituted or unsubstituted aryl group containing 6 to 20 carbon atoms, R
22
represents an alkylene group containing 1 to 18 carbon atoms, a substituted or unsubstituted arylene group containing 6 to 20 carbon atoms, an arylalkylene group containing 7 to 21 carbon atoms, or a direct bond, and Z
2
represents a divalent group. Examples of compound (B) having hydrosilyl groups suitable for the addition reaction to the above compounds include polysiloxane compounds represented by the formula:
wherein R
1
independently represents a substituted or unsubstituted alkyl group containing 1 to 18 carbon atoms, an aralkyl group containing 7 to 21 carbon atoms, or a substituted or unsubstituted aryl group containing 6 to 20 carbon atoms, and n
1
represents an integer of 0 to 500, and dimethyl silane.
When a ring-opening reaction of an epoxy group is used, examples of compound (A) include bis-epoxy compounds represented by the formula:
wherein R
11
represents an aliphatic or aromatic hydrocarbon group containing 1 to 13 carbon atoms, and m represents an integer of 0 to 20; bis-epoxy compounds represented by the formula:
wherein p and q independently represent an integer of 0 to 200; and modified silicones having an epoxy group at each end; and examples of compound (B) include diamines represented by the formula:
wherein R
12
represents an alkylene group containing 1 to 6 carbon atoms.
When an addition reaction to an isocyanate is used, examples of compound (A) include diisocyanates represented by the formula:
OCN—R
11
—NCO (A-4)
wherein R
11
is as defined above, and examples of compound (B) include diols such as ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, ethylene oxide-propylene oxide copolymers.
According to the second aspect of the present invention, a crosslinked copolymer having linear copolymer (C) as a base unit is provided, which is obtained by reacting linear copolymer (C) having two functional groups (b) with polyfunctional compound (D) having three or more functional groups (a), said linear copolymer (C) being obtained by reacting compound (A) with an excess of compound (B).
In a preferred embodiment, compound (A) is represented by the above formula (A-1), compound (B) is dimethyl silane or represented by the above formula (B-1), and compound (D) is represented by the formula:
wherein R
31
independently represents a hydrogen atom, a substituted or unsubstituted alkyl group containing 1 to 18 carbon atoms, or a substituted or unsubstituted aryl group containing 6 to 20 carbon atoms, R
32
represents an alkylene group containing 1 to 18 carbon atoms, an arylalkylene group containing 7 to 21 carbon atoms, a heteroatom-containing alkylene group containing 1 to 12 carbon atoms and 1 to 6 hete
Andou Eiji
Hino Takakazu
Hyodo Kenji
Ikegami Koshiro
Shikano Naoki
Ball Michael W.
Mitsubishi Paper Mills Limited
Rossi Jessica
LandOfFree
Ionically conductive composition and a cell manufactured by... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ionically conductive composition and a cell manufactured by..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionically conductive composition and a cell manufactured by... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3056226