Abstract: The invention relates to ionic compounds in which the anionic load has been delocalized. A compound disclosed by the invention includes an anionic portion combined with at least one cationic portion Mm+ in sufficient numbers to ensure overall electronic neutrality; the compound is further comprised of M as a hydroxonium, a nitrosonium NO+, an ammonium —NH4+, a metallic cation with the valence m, an organic cation with the valence m, or an organometallic cation with the valence m. The anionic load is carried by a pentacyclical nucleus of tetrazapentalene derivative bearing electroattractive substituents. The compounds can be used notably for ionic conducting materials, electronic conducting materials, colorant, and the catalysis of various chemical reactions.

Abstract: The invention relates to a lithium ion secondary battery including: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous solvent including a sulfone compound, the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the surface of the positive electrode current collector, the positive electrode active material layer includes lithium-containing composite oxide particles and a fluorocarbon resin, and a coverage of the fluorocarbon resin relative to the surface area of the lithium-containing composite oxide particles is 20 to 65%. It is an object of the invention to provide a lithium ion secondary battery that is kept from deteriorating in rate characteristics over time, in particular, from significantly deteriorating in rate characteristics during storage at high temperatures.

Abstract: An electrolyte includes an eutectic mixture composed of (a) a hetero cyclic compound having a predetermined chemistry figure, and (b) an ionizable lithium salt. An electrochemical device having the electrolyte. The eutectic mixture included in the electrolyte exhibits inherent characteristics of an eutectic mixture such as excellent thermal stability and excellent chemical stability, thereby improving the problems such as evaporation, ignition and side reaction of an electrolyte caused by the usage of existing organic solvents.

Abstract: The present invention intends to improve the intermittent cycle characteristics in a lithium ion secondary battery including, as a positive electrode active material, a lithium composite oxide mainly composed of nickel or cobalt. The present invention is a lithium ion secondary battery wherein the positive electrode includes active material particles including a lithium composite oxide. The lithium composite oxide is represented by the general formula (1): LixM1-yLyO2 (where 0.85?x?0?y?0.50, and element M is at least one selected from the group consisting of Ni and Co, and element L is at least one selected from the group consisting of alkaline earth elements, transition metal elements, rare earth elements, Group IIIb elements and Group IVb elements). The surface layer of the active material particles includes element Le being at least one selected from the group consisting of Al, Mn, Ti, Mg, Zr, Nb, Mo, W and Y. The active material particles are surface-treated with a coupling agent.

Abstract: The invention discloses a method of increasing the cycle life of rechargeable battery with a negative electrode (anode) made of lithium or lithium-containing alloys and electrolyte/salt solution which comprises one or more non-aqueous organic solvents and one or more lithium salts, the method comprising adding to the electrolyte/salt solution a lithium dendrite scavenging additive in an amount sufficient that a rate of lithium dendrite formation is equal to or lower than a rate of lithium dissolution occurring due to interaction with the dendrite scavenging additive dissolved in the electrolyte.

Abstract: A negative electrode is provided. The negative electrode includes a negative electrode current collector, and a negative electrode active material layer formed over the negative electrode current collector, and including a plurality of columnar bodies. An organic material layer having ion conductivity is held by said negative electrode active material layer, said organic material layer is formed at least in an inside of each of said columnar bodies. The active material layer may include silicon.

Abstract: To provide a novel pentafluorophenyloxy compound, a method for producing same, a nonaqueous electrolyte solution capable of forming a lithium secondary battery having excellent battery characteristics such as electrical capacity, cycling property and storage property, and a lithium secondary battery. A pentafluorophenyloxy compound represented by the general formula (I) shown below, a method for producing same, a nonaqueous electrolyte solution containing same and a lithium secondary battery: wherein R1 represents a —COCO— group, a S?O group or a S(?O)2 group, R2 represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group or an aralkyl group with the proviso that at least one of the hydrogen atoms of R2 may be each substituted with a halogen atom and that R2 does not represent an aryl group when R1 represents a —COCO— group.

Abstract: An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds, which initiates decomposition at 4V to 5V and show a constant current maintenance plateau region of more than or equal to 0.5V at measurement of LSV (linear sweep voltammetry). The additive compounds added to the electrolyte of the present invention decompose earlier than the organic solvent to form a conductive polymer layer on the surface of a positive electrode by increased electrochemical energy and heat at overcharge. The conductive polymer layer prevents decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent during high temperature storage, and also improves safety of the battery during overcharge.

Abstract: The invention provides a novel rinsing fluid which can convert an easily wettable resist pattern surface having a contact angle of 40° or below into one having a contact angle of 70° or above to inhibit pattern collapse effectively and thereby give high-quality products.

Abstract: This invention relates to overcharge protection and molecular redox shuttles in rechargeable lithium-ion cells. For this, specific nitroxyls or oxoammonium salts are used in the electrolyte. This invention also relates to a method of producing such lithium-ion cells and to a method of recharging such lithium-ion cells. This invention also pertains to some nitroxyls compounds and oxoammonium salts.

Abstract: A battery capable of improving battery characteristics such as cycle characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains 4-fluoro-1,3-dioxolane-2-one. Fluorine ion content in the electrolytic solution is preferably from 10 weight ppm to 3200 weight ppm. Thereby, chemical stability of the electrolytic solution is improved, and cycle characteristics are improved. The present invention is effective for the case using an anode active material containing Sn or Si as an element for an anode.

Abstract: Disclosed is a nonaqueous electrolytic solution useful for producing a lithium secondary battery having excellent cycle characteristics. Specifically disclosed is a nonaqueous electrolytic solution for lithium secondary batteries obtained by dissolving an electrolyte salt in a nonaqueous solvent which is characterized by containing 0.1 to 10 wt. % of a tert-alkylbenzene compound and also containing 0.001-0.5 wt. % of a benzene compound, wherein a hydrocarbon group having 1-4 carbon atoms is bonded to a benzene ring via the tertiary carbon atom, relative to the tert-alkylbenzene compound.

Abstract: A lithium secondary battery comprising positive and negative electrodes both capable of occluding and releasing lithium ions, and a lithium ion conductive material which contains a compound of formula (1) exhibits improved characteristics including charge/discharge efficiency, low-temperature properties and cycle performance when (a) only one substituent group of R1, R2, R3 and R4 in formula (1) is alkyl, (b) the negative electrode-constituting material partially contains a carboxyl or hydroxyl group-bearing compound, and the lithium ion conductive material contains propylene carbonate, or (c) a positive electrode active material is a lithium-containing transition metal compound, a negative electrode active material is a carbonaceous material, and the lithium ion conductive material contains as a non-aqueous electrolysis solution a solvent mixture of propylene carbonate and ethylene carbonate in combination with a chain-like carbonate as a low-viscosity solvent

Abstract: A rechargeable lithium-ion cell contains a positive electrode, negative electrode, charge-carrying electrolyte containing charge carrying medium and lithium salt, and an N-substituted or C-substituted phenothiazine compound dissolved in or dissolvable in the electrolyte. The substituted phenothiazine compound has an oxidation potential above the positive electrode recharged potential and serves as a cyclable redox chemical shuttle providing cell overcharge protection.

Abstract: The claimed invention is directed to an improved secondary battery having a substantially uniform thickness. In one embodiment, a can type lithium on secondary battery is formed to include a structure that enables the battery to have a substantially uniform thickness even when wrapped with a label. Illustratively, the structure may include a label overlap receiving section formed on a portion of either an upper or lower cover of the battery. The label overlap receiving section ensures that a certain portion of a label overlap area is not thicker than a thickness of an area of the label. In this manner, a substantially uniform battery thickness is provided.

Abstract: A non-aqueous electrolyte primary battery including: a positive electrode including a fluorinated carbon; a negative electrode including a lithium metal; a non-aqueous electrolyte; and a separator, wherein the non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, the non-aqueous solvent including ?-butyrolactone, and the separator includes a microporous membrane onto which a phosphoric acid ester is provided, the phosphoric acid ester being represented by the formula (1): where R1 is an alkyl group, R2 and R3 are each independently an alkylene group, and n is an integer.

Abstract: A secondary battery capable of improving the cycle characteristics and the storage characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode contains an anode active material containing a material that is capable of inserting and extracting an electrode reactant and has at least one of metal elements and metalloid elements. Further, the electrolytic solution contains a solvent containing a sulfone compound having a structure in which —S(?O)2—S—C(?O)— bond is introduced to a benzene skeleton.

Abstract: A secondary battery capable of improving the cycle characteristics while securing the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer containing a plurality of anode active material particles having silicon (Si). The anode active material layer contains at least one of an oxide-containing film covering a surface of the anode active material particles and a metal material not being alloyed with an electrode reactant provided in a gap in the anode active material layer. The electrolytic solution contains a solvent containing an organic acid that has a portion including an electron attractive group such as —(O?)C—C(?O)— bond in the center and a hydroxyl group on the both ends.

Abstract: Provided is a rechargeable lithium-ion cell that contains a positive electrode, a negative electrode, a charge-carrying electrolyte containing a charge carrying medium and a lithium salt, and a triphenylamine compound dissolved in or dissolvable in the electrolyte. The triphenylamine compound has an oxidation potential above the positive electrode recharged potential and serves as a cyclable redox chemical shuttle providing cell overcharge protection. Also provided are methods for manufacturing a rechargeable lithium-ion cell.

Abstract: An electrolyte for a lithium battery and a lithium battery thereof are provided. The electrolyte includes a non-aqueous organic solvent; lithium salt; and an additive selected from the group consisting of the compounds represented by formulas (1) to (3), and combinations thereof: where X is selected from the group consisting of hydrogen, halogen, alkyl groups having from 1 to 6 carbon atoms, and aryl groups having from 6 to 8 carbon atoms, and R is an alkyl group having from 1 to 6 carbon atoms or an aryl group having from 6 to 10 carbon atoms. The lithium battery including the electrolyte suggested in the present invention has superior overcharge characteristics and superior safety characteristics compared to conventional batteries including a non-aqueous electrolyte.

Abstract: This invention concerns a lithium rechargeable electrochemical cell containing electrochemical redox active compounds in the electrolyte. The cell is composed of two compartments, where the cathodic compartment comprises a cathodic lithium insertion material and one or more of p-type redox active compound(s) in the electrolyte; the anodic compartment comprises an anodic lithium insertion material and one or more of n-type redox active compound(s) in the electrolyte. These two compartments are separated by a separator and the redox active compounds are confined only in each compartment. Such a rechargeable electrochemical cell is suitable for high energy density applications. The present invention also concerns the general use of redox active compounds and electrochemically addressable electrode systems containing similar components which are suitable for use in the electrochemical cell.

Abstract: An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds. The additive compounds added to the electrolyte of the present invention decompose earlier than the organic solvent to form a conductive polymer layer on the surface of a positive electrode, and prevent decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent at initial charging, and thus reduces an increase of internal pressure and swelling during high temperature storage, and also improves safety of the battery during overcharge.

Abstract: An organic electrolytic solution for a lithium-sulfur battery that provides high discharge capacity and longer cycle life to the battery, and a lithium-sulfur battery including the organic electrolytic solution are provided.

Abstract: A battery capable of improving the cycle characteristics is provided. A current collector containing copper (Cu), in which ratio I(200)/I(111) between intensity I (200) of a peak originated in (200) crystal plane of copper obtained by X-ray diffraction and intensity I (111) of a peak originated in (111) crystal plane thereof is in the range from 0.5 to 1.5.

Abstract: A lithium electrochemical cell design incorporating a low molality electrolyte including LiI is disclosed. The resulting cell delivers excellent performance under a wide range of temperatures, conditions and drain rates.

Abstract: There are provided compounds represented by formula (I): in which R1 is F, Cl, —N(R5)2 or —CN and Q+ is selected among various organic cations that include an heterocyle. These compounds are useful as electrolytes, ionic liquids or molten salts.

Abstract: Pyrrolidinium-based room temperature ionic liquids, and phosphorus and arsenic analogues, are used as electrolytes in energy storage devices including secondary lithium batteries, supercapacitors and asymmetric battery-supercapacitors. The electrolytes preferably contain lithium ions as the charge-carrying species. The electrolytes are in a liquid state at the operating temperature.

Abstract: An electrolyte for a lithium battery includes a non-aqueous organic solvent, a lithium salt, and an additive comprising a) a sulfone-based compound and b) a C3 to C30 organic peroxide or azo-based compound. The electrolyte may further include a poly(ester)(meth)acrylate or a polymer that is derived from a (polyester)polyol with at least three hydroxyl (—OH) groups, where a portion or all of the hydroxyl groups are substituted with a (meth)acrylic ester and the remaining hydroxyl groups that are not substituted with the (meth)acrylic ester are substituted with a group having no radical reactivity. The lithium battery comprising the electrolyte of the present invention has a significantly improved charge-discharge and cycle life characteristics, recovery capacity ratio at high temperature, and swelling inhibition properties.

Abstract: Disclosed is a nonaqueous electrolyte for a lithium-ion secondary battery that contains an addictive for preventing destruction of a solid electrolyte interface (SEI) layer and hence decomposition of the electrolyte that may cause generation of a gas, thereby preventing swelling of the battery caused by the gas generated from the inside of the battery at a high temperature. More specifically, the present invention provides an electrolyte that includes, as an additive, 2-sulfobenzoic acid cyclic anhydride represented by the formula 1: The electrolyte contains the additive in an amount of 0.1 to 10.0 wt. %.

Abstract: A nonaqueous electrolyte having maleimide additives and rechargeable cells employing the same are provided. The nonaqueous electrolyte having maleimide additives comprises an alkali metal electrolyte, a nonaqueous solvent, and maleimide additives. Specifically, the maleimide additives comprise maleimide monomer, bismaleimide monomer, bismaleimide oligomer, or mixtures thereof. The maleimide additives comprise functional groups, such as a maleimide double bond, phenyl group carboxyl, or imide, enhancing the charge-discharge efficiency, safety, thermal stability, chemical stability, flame-resistance, and lifespan of the secondary cells of the invention.

Abstract: The present invention provides a lithium secondary battery having excellent battery cycle property, electrical capacity, storage characteristic and other battery characteristics for a long period of time, and a nonaqueous electrolytic solution which is usable for the lithium secondary battery. A nonaqueous electrolytic solution in which an electrolyte salt is dissolved in a nonaqueous solvent, comprising (i) a dicarbonyl compound represented by the general formula (I), or (ii) a dicarbonyl compound represented by the general formula (II) and vinylene carbonate and the like in the nonaqueous electrolytic solution. (wherein R1 represents a hydrogen atom, an alkyl group, an alkenyl group, a phenyl group or the like; and X represents a hydrogen atom, an R2 group or an OR2 group. R2 represents an alkyl group, an alkenyl group, a phenyl group or the like.) (wherein R1 and X are the same as above; Y and Z represents a hydrogen atom, an R2 group, an OR2 group, a COR2 group or a CH2COR2 group; and n is 1 to 6.

Abstract: A battery, which has excellent safety in an overcharged state and is excellent in low-temperature characteristics and cycle characteristics, is provided. The electrolytic solution of the secondary battery contains a compound which has a diazine N,N?-dioxide structure represented by general formula (1). in which, n, m, n?, and m? each independently are an integer 0 or larger; the diazine rings and the benzene rings may be condensed alternately or randomly; and substituents R1, R2, R3, R4, Ra, Rb, Rc, and Rd each independently represent hydrogen atom, halogen atom, or specific group. However, when n is 2 or larger, then Ra and Rb may be the same or different, and when n? is 2 or larger, then Rc and Rd may be the same or different. In addition, these substituents, in cooperation with each other, may form a ring structure.

Abstract: An electrolyte and battery using same is provided. The electrolyte comprising at least one of a compound represented by Formula 1, wherein, R1, P2, R3, and R4 represent a hydrogen group, or a methyl group and an ethyl group; X, Y, and Z represent sulfur (S) or oxygen (O) or Formula 2, wherein, R1 and R2 represent a hydrogen group, a halogen group, or a methyl group and an ethyl group, or groups in which a part of hydrogen thereof is substituted by a halogen group; X, Y, and Z represent sulfur (S) or oxygen (O), which can retain chemical stability at high temperatures. Use of the electrolyte allows a battery to have excellent characteristics in a hot environment.

Abstract: 1. A non-aqueous electrolytic solution comprising an electrolytic salt in a non-aqueous solvent, which further contains a pentafluorophenoxy compound having the formula (I): in which R represents a substituting group such as an alkylcarbonyl group, an alkoxycarbonyl group, an aryloxy-carbonyl group, and an alkanesulfonyl group, under the condition that at least one hydrogen atom contained in the substituting group can be substituted with a halogen atom or an aryl group.

Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution where the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A, and the compound B is at least one selected from an aromatic compound and a heterocyclic compound. Thus, a non-aqueous secondary battery having excellent overcharging safety and being capable of ensuring storage reliability with less generation of gas during storage at a high temperature can be provided.

Abstract: A non-aqueous secondary battery is provided, which has excellent overcharging safety, less generation of gas during storage at a high temperature, and can ensure storage reliability. A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and an aromatic or/and heterocyclic compound B oxidized at a potential lower than that of the compound A, a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and a lactam-based compound selected from the group consisting of compounds represented by formulas 1 to 6: where R is a H radical, a C2 to C6 alkenyl or a halogen radical; and K, T, X, Y and Z are identically or independently H radicals or halogen radicals.

Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.

Abstract: Disclosed is an electrochemical cell comprising a lithium anode and a sulfur-containing cathode and a non-aqueous electrolyte solvent. In the fully charged state of the cell the concentration of lithium ions is preferably less than 0.3 M. The cell delivers high discharge capacity at discharge rates, for example, C/5, over temperatures ranges of from +25° C. to ?20° C. Also disclosed is a battery including an electrochemical cell according to the invention and a device that utilizes such a battery to derive power.

Abstract: A novel liquid-crystalline ionic conductor, which is useful in the electric, electronic, chemical and bioengineering fields, as an anisotropic reaction solvent, ionic conductor, electric field-responsible conductor or the like, and a method for producing the same, is provided. The liquid-crystalline ionic conductor is obtained by mixing an organic molten salt with a-liquid-crystalline organic molecule or a liquid-crystalline inorganic molecule, which comprises a moiety miscible to the organic molten salt and a moiety that shows liquid-crystalline orientation, thereby forming a liquid-crystalline ionic conductor, wherein the organic molten salt is assembled to the liquid-crystalline molecule.

Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.

Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.

Abstract: A nonaqueous electrolytic solution and a lithium battery employing the same include a lithium salt, an organic solvent, and a halogenated benzene compound. The use of the nonaqueous electrolytic solution causes formation of a polymer by oxidative decomposition of the electrolytic solution even if a sharp voltage increase occurs due to overcharging of the battery, leading to consumption of an overcharge current, thus protecting the battery.

Abstract: The invention relates to a non-aqueous electrochemical apparatus in which the difference (?l??se) between the surface tension ?l of non-aqueous electrolyte and the surface free energy ?se of electrode is not more than 10 dynes/cm.

Abstract: A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent such as alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, aryloxy, acyloxy, alkanesulfonyloxy, arylsulfonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, halogen, CF3, CCl3, or CBr3. Preferably, a small amount of methyl 2-propylcarbonate, 2-propynyl methanesulfonate, 1,3-propanesultone, divinylsulfone, 1,4-butanediol dimethanesulfonate or cyclohexylbenzene is further incorporated.

Abstract: A nonaqueous electrolyte secondary battery includes positive and negative electrodes, a separator, a nonaqueous electrolyte provided by dissolving a lithium salt in a nonaqueous solvent. The nonaqueous electrolyte contains a compound as shown in the chemical formula below and has a boroxin ring and polyalkylene oxide chains: R1═R1′—(O-Alk1)n1— R2═R2′—(O-Alk2)n2— R3═R3′—(O-Alk3)n3— where AlK1, AlK2, AlK3 are identical with or different from one another, each of AlK1, AlK2, AlK3 representing one type of alkylene having a carbon number of 2 or 3, and R′1, R′2, R′3 are identical with or different from one another, each of R′1, R′2, R′3 representing one type of alkyl having a carbon number of 1 or 2.

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and a lactam-based compound selected from the group consisting of compounds represented by formulas 1 to 6: 1

Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.

Abstract: A new sandwich cathode design is provided having a first cathode structure of a first cathode active material of a relatively low energy density but of a relatively high rate capability, for example SVO, mixed with a second cathode active material having a relatively high energy density but a relatively low rate capability, for example CFx, with the percentage of SVO being less than that of CFx and sandwiched between two current collectors. Then, a second cathode mixture of SVO and CFx active materials is contacted to the outside of the current collectors. However, the percentage of SVO to CFx is greater in the second structure than in the first. Such an exemplary cathode design might look like: (100−y)% SVO+y% CFx, wherein 0≦y≦100/current collector/(100−x)% SVO+x% CFx, wherein 0≦x≦100/current collector/(100−y)% SVO+y% CFx, wherein 0≦y≦100, and wherein the ratio of x to y is selected from the group consisting of y<x, x<y and x=y.

Abstract: The present invention relates to an electrolyte for non-aqueous electrochemical device containing at least one of 6-substituted-1,3,5-triazine-2,4-dithiol and derivatives thereof as an additive and a non-aqueous electrochemical device, particularly a lithium secondary battery by the use thereof. The additive of the present invention forms a stable and low resistance film on the positive electrode, inhibiting characteristics of the electrochemical device from deteriorating on account of gas generated due to the decomposition of electrolyte.