Abstract: A polymeric electrolyte and a lithium battery lithium employing the same. The polymeric electrolyte includes a cross-linked polyether urethane prepared by reacting a pre-polymer having a polyethylene oxide backbone and terminated with NCO, with a cross-linking agent, organic solvent and lithium salt. Since the polymeric electrolyte is electrochemically stable, a lithium battery having improved reliability and safety can be obtained by employing the polymeric electrolyte.

Abstract: An organic salt having an alkali metal bound to a disubstituted amide of alkane iminosulfinic acid has the following general formula: where Ar is an aromatic group, M is an alkali metal such as Li, K or Na, and CxHy is an alkane. The organic salt can be used to form non-aqueous liquid and gel or plasticized polymer electrolytes. The electrolytes can be used to form improved lithium and lithium ion batteries.

Abstract: Voltage delay in an active metal anode/liquid cathode battery cell can be significantly reduced or completely alleviated by coating the active metal anode (e.g., Li) surface with a thin layer of an inorganic compound with Li-ion conductivity using chemical treatment of Li surface. Particularly, preferred examples of such compounds include lithium phosphate, lithium metaphosphate, and/or their mixtures or solid solutions with lithium sulphate. These compounds can be formed on the Li surface by treatment with diluted solutions of the following individual acids: H3PO4, HPO3 and H2SO4, their acidic salts, or their binary or ternary mixtures in a dry organic solvent compatible with Li, for instance in 1,2-DME; by various deposition techniques. Such chemical protection of the Li or other active metal electrode significantly reduces the voltage delay due to protected anode's improved stability toward the electrolyte.

Abstract: The present application discloses a lithium-ion battery using heat-activatable microporous membrane which comprises a hot-melt adhesive, an engineering plastics, a tackifier and a filler. It also discloses methods of preparing such microporous membrane and the lithium-ion batteries. The battery built with the use of the microporous membrane of the present invention shows high rate capability, long cycle life, and low as well as stable impedance during charge-discharge cycling. The microporous membrane of the present invention also shows thermal shutdown behavior.

Abstract: An apparatus for use as a fracture absorption layer, an apparatus for use as a electrochemical device, and methods of manufacturing the same are taught. The apparatuses and methods of the present invention may be of particular use in the manufacture of thin-film, lightweight, flexible or conformable, electrochemical devices such as batteries, and arrays of such devices. The present invention may provide many advantages including stunting fractures in a first electrochemical layer from propagating in a second electrochemical layer.

Abstract: Disclosed is a nonaqueous electrolyte comprising a nonaqueous solvent which contains ethylene carbonate (EC), propylene carbonate (PC), &ggr;-butyrolactone (BL), and a fourth component, which is a solvent other than the EC, PC and BL, and the mixing ratio x (% by volume) of EC based on the total amount of the nonaqueous solvent falls within a range of between 15 and 50, the mixing ratio y (% by volume) of PC based on the total amount of the nonaqueous solvent falls within a range of between 2 and 35, the mixing ratio z (% by volume) of BL based on the total amount of the nonaqueous solvent falls within a range of between 30 and 85, and the mixing ratio p (% by volume) of the fourth component based on the total amount of the nonaqueous solvent is larger than 0 and is not larger than 5.

Abstract: A non-aqueous electrolytic solution capable of depressing deterioration of battery properties in a high temperature environment is provided. A secondary battery is also provided. The non-aqueous electrolytic solution containing at least an organic solvent and a lithium salt further contains a particular pyridine compound.

Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one carbonate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture including ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate. The preferred additive is either a linear or cyclic carbonate containing covalent O—X and O—Y bonds on opposite sides of a carbonyl group wherein at least one of the O—X and the O—Y bonds has a dissociation energy less than about 80 kcal/mole.

Abstract: This invention relates to electrolyte solution compositions useful in lithium-ion batteries. These electrolytes feature lower volatility than solutions known in the art while retaining excellent battery performance using graphite based negative electrode active materials.

Abstract: The present invention relates to a polyalkylene oxide based polymer composition for solid polymer electrolytes having superior mechanical properties and ionic conductivity by comprising a cross-linking agent with at least two functional groups of phenyl alkyleneglycol acrylate substitited in core molecules; a softener of polyalkyleneglycol alkylether alkyl(metha)acrylate; a plasticizer of polyalkyleneglycol dialkylether; a initiator and lithium salt thus can be useful as an electrolyte for a high capacity lithium-polymer secondary battery for load leveling or electric vehicles as well as an electrolyte for a small capacity lithium-polymer secondary battery for portable information terminals such as a cellular phone and a notebook computer, and electronic products such as a camcorder.

Abstract: A non-aqueous electrolyte rechargeable battery is resistant to the reflow temperature during reflow soldering. The non-aqueous electrolyte rechargeable battery has a positive electrode having an active material comprised of an oxide of molybdenum, a negative electrode comprised of lithium and SiO, an electrolytic solution comprised of a material containing a supporting salt and resistant to the reflow temperature during reflow soldering of the non-aqueous electrolyte rechargeable battery, and a gasket comprised of a compound selected from the group consisting of LCP, PEEK, PEN, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

Abstract: Nonaqueous electrochemical cell (9) with a negative electrode (4), an electrolytic solution and a positive electrode (3). The operational safety is increased by the fact that the cell contains a salt (10) in solid state in the area of at least one of the two electrodes (3,4).

Abstract: A polymer electrolyte extends the cycle life, improves the safety, and reduces the swelling of a battery, compared with a polymer electrolyte containing a poly(alkylene oxide) polymer. Also, a lithium battery utilizes the polymer electrolyte. The polymer electrolyte contains a polymerized product from a polymer electrolyte forming composition containing a multifunctional isocyanurate monomer of a particular structure, a lithium salt, and a non-aqueous organic solvent.

Abstract: Disclosed is an electrolyte capable of obtaining an excellent quality of electrolyte, and a battery using the electrolyte. A battery device in which a positive electrode and a negative electrode are stacked with a separator being interposed therebetween is enclosed inside an exterior member. The separator is impregnated with an electrolyte. The electrolyte contains a high polymer, a plasticizer, a lithium and at least either carboxylic acid or carboxylate. Therefore, when preparing a high polymer by means of polymerization of monomers, the polymerization of monomers can be smoothly processed even if there is a factor for inhibiting reaction such as copper. As a result, the amount of non-reacted monomers remained in the electrolyte can be suppressed to be extremely small. Therefore, decomposition and reaction of monomers are suppressed even after repeating charging/discharging, so that the deterioration in the charging/discharging efficiency and the charging/discharging characteristic can be prevented.

Abstract: A lithium battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte containing a lithium trifluoromethanesulfonimide solute and a solvent, wherein the positive electrode comprises a positive-electrode active material of boron-containing lithium-manganese complex oxide with a specific surface area of 12 to 45 m2/g.

Abstract: It is the object of the present invention to provide a curable composition capable of giving a polymer electrolyte showing a high level of ionic conductivity and excellent mechanical strength as well. The invention provides a curable composition for polymer electrolyte which comprises the following constituents (A) to (D) as essential constituents: (A) a polysiloxane having a polyethylene oxide structure-containing group and/or a cyclic carbonate structure-containing group as a substituent on a silicon atom and having two or more SiH groups; (B) a compound having at least one structure selected from the group consisting of a phenylene unit, a siloxy linkage, an Si—N bond, a carbonyl group, an amide linkage and an amino group and having two or more alkenyl groups; (C) a hydrosilylation catalyst; and (D) an electrolyte salt compound.

Abstract: The present invention relates to a solid polymer electrolyte of polyether poly(N-substituted urethane) comprising an electrolytic compound and a polymer matrix, wherein the polymer matrix is a copolymer comprising polyether unit and polyurethane unit and has 50,000-2,000,000 of a weight average molecular weight, where N-positions of the polyurethane unit are substituted with oligo(ethylene oxide) derivatives which provide flexibility and electrolytic conduction of the polymer matrix by controlling its length, composition, structure and crosslinked degree. Accordingly, the solid polymer electrolyte of the present invention provides excellent thermal stability, electrochemical stability and mechanical properties and thus, is suitable for use in polymer secondary batteries and electrochemical devices.

Abstract: Provided are a polymeric electrolyte or a nonaqueous electrolyte that can improve a transport rate of charge carrier ions by adding a compound having boron atoms in the structure, preferably one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4), and an electric device such as a cell or the like using the same. wherein R11, R12, R13, R14, R15, R16, R21, R22, R23, R24, R25, R26, R27, R28, R31, R32, R33, R34, R35, R36, R37, R38, R39, R310, R41, R42, R43, R44, R45, R46, R47, R48, R49, R410, R411 and R412 each represent a hydrogen atom, a halogen atom or a monovalent group, or represent groups bound to each other to form a ring, and Ra, Rb, Rc and Rd each represent a group having a site capable of being bound to boron atoms which are the same or different.

Abstract: All-solid-state electrochemical cells and batteries employing very thin film, highly conductive polymeric electrolyte and very thin electrode structures are disclosed, along with economical and high-speed methods of manufacturing. A preferred embodiment is a rechargeable lithium polymer electrolyte battery. New polymeric electrolytes employed in the devices are strong yet flexible, dry and non-tacky. The new, thinner electrode structures have strength and flexibility characteristics very much like thin film capacitor dielectric material that can be tightly wound in the making of a capacitor. A wide range of polymers, or polymer blends, characterized by high ionic conductivity at room temperature, and below, are used as the polymer base material for making the solid polymer electrolytes. The preferred polymeric electrolyte is a cationic conductor. In addition to the polymer base material, the polymer electrolyte compositions exhibit a conductivity greater than 1×10−4 S/cm at 25° C.

Abstract: A non-aqueous electrolytic cell having a positive electrode, which has a positive electrode active material layer containing, at least a positive electrode active material; a negative electrode, which has a negative electrode active material layer containing, at least, a negative electrode active material; and an electrolyte, wherein a sulfur compound is added to at least one of the positive electrode active material and/or the negative electrode active material.

Abstract: The present invention provides a non-aqueous electrolyte secondary cell including: a cathode containing a manganese oxide or a lithium-manganese composite oxide; an anode containing a lithium metal, a lithium alloy, or a material capable of doping/dedoping lithium; and an electrolyte containing at least two electrolyte salts, one of which is LiBF4 contained in the range from 0.005 mol/l to 0.3 mol/l. This enables to increase the cycle characteristic, preventing deterioration of the cell characteristic caused by a repeated use.

Abstract: The present invention improves the performance of lithium electrochemical cells by providing a new electrode assembly based on a sandwich cathode design, but termed a double screen sandwich cathode electrode design. In particular, the present invention uses sandwich cathode electrodes which are, in turn, sandwiched between two half double screen sandwich cathode electrodes, either in a prismatic plate or serpentine-like electrode assembly. In a jellyroll electrode assembly, the cell is provided in a case-positive design and the outside round of the electrode assembly is a half double screen sandwich cathode electrode.

Abstract: A wide range of solid polymer electrolytes characterized by high ionic conductivity at room temperature, and below, are disclosed. These all-solid-state polymer electrolytes are suitable for use in electrochemical cells and batteries. A preferred polymer electrolyte is a cationic conductor which is flexible, dry, non-tacky, and lends itself to economical manufacture in very thin film form. Solid polymer electrolyte compositions which exhibit a conductivity of at least approximately 10−3-10−4 S/cm at 25° C. comprise a base polymer or polymer blend containing an electrically conductive polymer, a metal salt, a finely divided inorganic filler material, and a finely divided ion conductor.

Abstract: A rechargeable lithium-ion cell capable of being discharged to deliver high power pulses sufficient for implantable defibrillation applications and the like, is described. The cell is housed in a casing having an external volume of 5 cm3, or less. Both the negative and positive electrodes are less than about 0.15 mm in total thickness. Negative and positive electrodes of a reduced thickness provide the cell with high electrode surface area relative to its volume. As such, the present cell is capable of providing pulses in excess of 30C with minimal voltage drop.

Abstract: The non-aqueous electrolyte battery of the present invention has a negative electrode comprising metallic lithium, a lithium alloy or a material capable of absorbing and desorbing lithium; a positive electrode; a non-aqueous electrolyte comprising a solvent and a solute dissolved in the solvent, wherein the above non-aqueous electrolyte contains at least one additive selected from phthalimide, derivative of phthalimide, phthalimidine, derivative of phthalimidine, tetrahydrophthalimide and derivative of tetrahydrophthalimide. On account of the effect of the above additive, the nonaqueous electrolyte battery of the present invention is not liable to cause an increase in the internal resistance during a long-term storage at high temperatures, and the charge/discharge cycle characteristics are improved in a secondary battery.

Abstract: Provided are a polymeric gel electrolyte comprising a lithium salt, an organic solvent and a thermal curing product of a composition having a terpolymer having a repeating unit represented by formula (1), a repeating unit represented by formula (2) and a repeating unit represented by formula (3): wherein n is an integer from 1 to 12, and R is a C1 to C12 alkyl group, and a lithium battery employing the polymeric electrolyte. Use of a polymeric gel electrolyte according to the present invention can effectively suppress swelling due to an electrolytic solution, and a lithium battery which can prevent reliability and safety from being lowered due to the swelling, can be attained.

Abstract: An electrolyte for a lithium battery includes a non-aqueous organic solvent, a lithium salt, and an additive comprising a) a compound represented by the following Formula (1), and b) a compound selected from the group consisting of a sulfone-based compound, a poly(ester)(metha)acrylate, a polymer of poly(ester)(metha)acrylate, and a mixture thereof: 1

Abstract: Use of vinylidenfluoride (VDF) copolymers for preparing electrolyte polymers, wherein the VDF copolymers have the following polymeric structure (I): (CH2—CF2)m—(CXY—C(ORf)Z)n—(CF2—CF(CF3))p) wherein: Rf is a perfluoroalkyl group having from 1 to 3 carbon atoms; X, Y, and Z equal to or different from each other are selected from F, Cl or H; m,n and p are integers, n or p can be 0 but not simultaneously; said VDF copolymers being obtainable by emulsion polymerization at 75-120° C., preferably 95°-120° C., in the presence of organic initiators.

Abstract: A non-aqueous electrolyte battery free from considerable change in the structure of a positive electrode active material thereof to enlarge the capacity thereof, incorporating a positive electrode containing a positive-electrode active material; a negative electrode containing a negative-electrode active material to which Li can be doped/dedoped; and a non-aqueous electrolyte disposed between the positive electrode and the negative electrode and containing non-aqueous solvent and an electrolyte, wherein a material expressed by general formula LiMn1−yAlyO2 (0.06≦y<0.25) is contained as the positive-electrode active material and LiMn1−yAlyO2 has a crystalline structure expressed by spatial group C2/m.

Abstract: A solid polymer electrolyte for an electrolytic cell is prepared by a sol-gel process in which an active metal ion conducting liquid electrolyte, e.g. a lithium-ion electrolyte, containing a salt which is stable in the presence of water, e.g. lithium bisperfluoroethanesulfonimide, LiN(SO2C2F5)2, is admixed in aqueous solution with an alkoxide, e.g. silica alkoxide, to form a liquid precursor which is added to the electrolytic cell between the anode and cathode thereof and allowed to solidify in situ to form the solid electrolyte.

Abstract: An organic electrolyte containing an organic solvent mixture and a lithium salt, wherein the organic solvent mixture includes 20 to 60% by volume of ethylene carbonate, 5 to 30% by volume of polypropylene carbonate, and 20 to 70% by volume of chain carbonate. The organic electrolyte improves charge/discharge cycle characteristics while maintaining high discharge capacity and low-temperature discharge characteristics.

Abstract: A solid composite polymer electrolyte contains a general amorphous branched polymer having recurrent units, each of which includes a backbone chain and at least a side chain linked to the backbone chain and containing at least one coordination potential atom, an amphoteric metal salt dispersed in the branched polymer and forming Lewis acid-base interactions with the side chains, and an amphoteric Lewis acid-base ceramic filler dispersed in the branched polymer and forming Lewis acid-base interactions with the side chains and the metal salt.

Abstract: The battery of this invention includes a positive electrode including a gelled polymeric electrolyte (A) and using spinel type lithium manganese oxide as an active material; a negative electrode; a gelled polymeric electrolyte (B) in the shape of a film or sheet also serving as a separator, and both the gelled polymeric electrolyte (A) and the gelled polymeric electrolyte (B) are made from a polymer of poly(alkylene oxide) series impregnated with a liquid electrolyte. Since the battery includes the positive electrode using the specific gelled polymeric electrolyte (A), a contact area between the positive electrode active material and the gelled polymeric electrolyte is large, so as to attain large initial discharge capacity (at high rate discharge in particular).

Abstract: A solid polymer electrolyte includes a crosslinking agent, a poly(alkylene glycol) alkyl ether alkyl (meth)acrylate, a lithium salt and a curing initiator. The crosslinking agent includes a compound represented by formula (I): wherein A is oxygen, COO, alkyl of C1-4, or a single bond, R is a 6-membered aliphatic, aromatic or heterocyclic group, Ra, Rb and Rc independently are a linear or branched alkyl group of C1-10, Rd, Re and Rf independently are H or a methyl group, and p, q and r independently are an integer of 1 from 20. The poly(alkylene glycol) alkyl ether alkyl (meth)acrylate is represented by formula (II) wherein R1 and R2 independently are a linear or branched aliphatic or aromatic group of C1-10, R3, X, Y, Z independently are H or a methyl group, and p, q and r independently are an integer from 1 to 20.

Abstract: Polymer electrolyte composites for alkali metal electrochemical devices which are formed by coating an inert, lightweight, electrically insulating, non-woven glass fiber net which includes a polyvinyl alcohol binder, with a liquid polymer which may be ionically conductive, and curing the polymer to form a solid or semi-solid state electrolyte composite.

Abstract: The present invention relates to an electrolytic solution excellent in stability, and also relates to a battery excellent in battery performance and having an outer structure having light weight. The electrolytic solution contains a supporting electrolyte and a gas formation inhibitor in the solvent. The gas formation inhibitor contains a decomposition product of the supporting electrolyte with formation of a gas in the solvent. It functions as controlling to solution equilibrium in the electrolytic solution participating in decomposition reaction of the supporting electrolyte. A battery is obtained by filling the electrolytic solution between a positive electrode and a negative electrode.

Abstract: A nonaqueous electrolyte lithium primary or secondary battery having improved storage property is disclosed. The battery includes a positive electrode; a negative electrode in which the active material is lithium, a lithium alloy or a compound capable of occluding and discharging lithium; and a nonaqueous electrolyte including a solvent containing at least 10 wt % of dioxolane or derivative of dioxolane and an electrolytic solute represented by LiN(CmF2m+1SO2)(CnF2n+1SO2) (where m is a natural number of 1 or greater, and n is a natural number of 2 or greater).

Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one nitrite additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl nitrite compound.

Abstract: Solid composite electrolytes are provided for use in lithium batteries which exhibit moderate to high ionic conductivity at ambient temperatures and low activation energies. In one embodiment, a polymer-ceramic composite electrolyte containing poly(ethylene oxide), lithium tetrafluoroborate and titanium dioxide is provided in the form of an annealed film having a room temperature conductivity of from 10−5 S cm−1 to 10−3 S cm−1 and an activation energy of about 0.5 eV.

Abstract: The invention encompasses battery electrolytes and batteries. In one aspect, the invention encompasses a battery electrolyte which includes the lithium salts, LiN(CF3SO2)2, and LiCF3SO3 in a solvent blend comprising ethylene carbonate, propylene carbonate, and 1,2-dimethoxyethane. In another aspect, the invention encompasses a battery. The battery includes a first electrode, a second electrode, and an electrolyte between the first and second electrodes. The electrolyte comprises these lithium salts in a solvent blend comprising ethylene carbonate, propylene carbonate, and 1,2-dimethoxyethane. In yet another aspect, the invention encompasses another embodiment of a battery. The battery includes a cathode comprising at least one of MnO2 and (CF)x, and an anode comprising lithium. The battery further includes a non-aqueous electrolyte between the cathode and the anode.

Abstract: An electrolyte solution for a lithium secondary battery comprising a non-aqueous solvent, and an electrolyte and a carbonic ester derivative both dissolved therein, said carbonic ester derivative having the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R.sup.2 may be a hydrogen atom and provided that R.sup.1 and R.sup.2 may be connected through a methylene group to form a cycloalkyl group having 3 to 6 carbon atoms.

Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one nitrate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an organic alkyl nitrate compound.

Abstract: A method of preparing an anode material using sepiolite clay having channel-like interstices in its lattice structure. Carbonaceous material is deposited in the channel-like interstices of the sepiolite clay and then the sepiolite clay is removed leaving the carbonaceous material. The carbonaceous material is formed into an anode. The anode is combined with suitable cathode and electrolyte materials to form a battery of the lithium-ion type.

Abstract: A current collector in the form of a conductive substrate subjected to a special chemical etch on both major surfaces to provide a "basket weave" structure, is described. The basket weave structures has a lattice construction surrounded by a frame and comprising first strand structures intersecting second strand structures to provide a plurality of diamond-shaped openings or interstices bordered by the strands. The strand structures intersect or join with each other at junctions thereby forming the current collector as an integral unit.

Abstract: Polymer electrolyte composites for alkali metal electrochemical devices which are formed by coating an inert, lightweight, electrically insulating, woven or non-woven glass fiber net with a liquid, ion-conductive polymer, and curing the polymer to form a solid state or semi-solid state electrolyte composite.

Abstract: A non-aqueous electrolyte battery according to the invention includes a positive electrode using a lithium-metal compound oxide as a positive electrode material, a negative electrode and a non-aqueous electrolyte solution, the battery employing a positive electrode material composed of the lithium-metal compound oxide which contains at least Ni, Co and Mn, and has a peak with a full width at half maximum of not greater than 0.22.degree. in a range of 2.theta.=18.71.+-.0.25.degree. as measured by the powder X-ray diffraction analysis using a Cu-K.alpha. X-ray source or employing a positive electrode material composed of a lithium-metal compound oxide which contains at least Ni, Co and Mn, and a non-aqueous electrolyte solution which includes a solvent containing ethylene carbonate and a solute containing at least one type of fluorine-containing compound.

Abstract: The present invention provides a process for generating acid-free lithium salt solutions for lithium and lithium ion batteries and for preparing high purity lithium salts. The invention comprises removing acid species from lithium salt solutions such as lithium hexafluorophosphate solutions using weak base resins. The process does not require the addition of a base such as ammonia which when added to the electrolytic solution generally must be removed from the final product. Once the lithium salt has been treated by the weak base resin, the substantially acid-free lithium salt solution may be recovered from the weak base resin to provide a solution which may be used as an electrolytic solution or which may be used to prepare high purity lithium salts.

Abstract: The power loss of lithium/lithium ion battery cells is significantly reduced, especially at low temperatures, when about 1% by weight of an additive is incorporated in the electrolyte layer of the cells. The usable additives are organic solvent soluble cyanoethylated polysaccharides and poly(vinyl alcohol). The power loss decrease results primarily from the decrease in the charge transfer resistance at the interface between the electrolyte and the cathode.

Abstract: A composite electrolyte comprises (a) surface modified fumed silica filler, wherein the surface modified fumed silica comprises polymerizable groups on the surface thereof, the polymerizable groups being bonded to each other such that the surface modified fumed silica filler is crosslinked in a three-dimensional structure; (b) a dissociable lithium salt; and (c) a bulk medium which contains the surface modified fumed silica filler and the dissociable lithium salt. An electrochemical cell comprises an anode, a cathode, and a composite electrolyte dispersed between the anode and cathode.

Abstract: The present invention relates to an ionically conductive polymeric gel electrolyte for batteries having high ionic conductivity and sufficiently high solid strength. The invention has an object to provide a solid battery which prevents internal short-circuiting even if no diaphragm is used and which has high reliability, by using the ionically conductive polymeric gel electrolyte. Disclosed is an ionically conductive polymeric gel electrolyte, containing at least a polymer matrix, a non-aqueous electrolytic solution and an electrolytic salt, wherein at least one kind of a halogen-substituted carbonic ester is contained as a solvent of the non-aqueous electrolytic solution. Also disclosed is a solid battery having the ionically conductive polymeric gel electrolyte as a constituent.