45results about How to "Excellent charge-discharge cycle characteristics" patented technology

A lithium ion conductive solid electrolyte includes an ion conductive inorganic solid and, in a part or all of the pores of the inorganic solid, a material of a composition which is different from the composition of the inorganic solid exists. A method for manufacturing this lithium ion conductive solid electrolyte includes a step of forming an ion conductive inorganic solid to a predetermined form and a step of thereafter filling a material of a composition which is different from the composition of the inorganic solid in pores of the inorganic solid.

A solid electrolyte comprising powder of an inorganic substance comprising a lithium ion conductive crystal or powder of a lithium ion conductive glass-ceramic and an organic polymer added with an inorganic or organic lithium salt, and being free of an electrolytic solution. The organic polymer is a copolymer, a bridge structure or a mixture thereof of polyethylene oxide and other organic polymer or polymers. A lithium ion secondary battery comprises this solid electrolyte.

At least two metallic materials containing element such as silicon and tin, which has ability of insertion and desertion of lithium element, and optionally another metallic material containing element such as copper are molten to prepare a melt. The melt is rapidly cooled by strip-cast method at a cooling rate of more than 2x103 ° C. / sec and no more than 104 ° C. / sec to be cast. Further, the cast is milled and classified into alloy powder having an average particle size of 0.1 mum to 50 mum. The alloy powder and conductive agent are laminated with binder onto a collector to obtain a negative electrode for a secondary battery. The negative electrode is employed to obtain a lithium secondary battery having high electric charge and discharge capacity, and good property of charge and discharge cycle.

A positive electrode material for a nonaqueous electrolyte secondary battery is obtained which attains good thermal stability and high discharge capacity and shows satisfactory charge-discharge cycle performance characteristics. A nonaqueous electrolyte secondary battery using the positive electrode material is also obtained. Characteristically, the positive electrode material for a nonaqueous electrolyte secondary battery contains a positive active material (e.g., lithium-containing layered complex oxide) capable of lithium storage and release, a lithium phosphate compound such as Li3PO4, and Al2O3. The lithium phosphate compound and Al2O3 are preferably disposed near the positive active material.

A lithium secondary battery is provided with the following components: an anode which is provided with an anode mixture layer on one surface or two surfaces of a collector, wherein the anode mixture layer comprises a lithium-containing composite oxide which comprises lithium and transition metal and at least one part of the anode mixture layer is the lithium-containing composite oxide that comprises nickel as the transition metal, and the lithium-containing composite oxide is used as an anode active material; a cathode; and a separator plate in which nonaqueous electrolyte that comprises 0.5-5wt% of halogen-substituted cyclic carbonate. At a side part of the battery housing, a breaking groove which breaks on condition that the pressure in the battery housing is larger than a threshold value in a manner of crossing with a diagonal line when viewed from the wide breadth side.

A material of negative electrode for lithium secondary battery, comprising base material particles having either an A-phase composed mainly of silicon or a mixed phase of the A-phase and a B-phase consisting of an intermetallic compound of transition metal element and silicon, wherein the A-phase and mixed phase are microcrystalline or amorphous, and wherein a carbon material adheres to part of the surface of the base material particles while the rest of the surface is coated with a film containing silicon oxide. The lithium secondary battery having this material of negative electrode for lithium secondary battery applied thereto excels in charge discharge cycle characteristics, being reduced in irreversible capacity, and has a capacity strikingly higher than that of the lithium secondary battery utilizing conventional carbon material in the negative electrode material.

The object of the present invention is to provide a nickel metal-hydride battery excellent in cycle performance, high-rate discharging ability, and output power performance, by utilizing a hydrogen absorbing electrode comprising a hydrogen absorbing alloy powder as an active material, which is excellent in resistance to corrosion and high-rate discharging performance. Provided are a hydrogen absorbing electrode comprising 100 parts by weight of a hydrogen absorbing alloy powder which contains, as a main component, a rare earth element and a transition metal element, and has a saturation mass susceptibility of 1.0 to 6. 5 emu / g, and 0.3 to 1.5 part by weight of an oxide or hydroxide of a rare earth element, the oxide or hydroxide has as a main component one or two or more rare earth elements selected from a group consisting of Dy, Ho, Er, Tm, Yb, and Lu and is in the form of powder whose average diameter is equal to or less than 5 [mu]m, and a nickel metal-hydride battery comprising a nickel electrode as a positive electrode and a hydrogen absorbing electrode as a negative electrode.

In a non-aqueous electrolyte secondary battery, a positive electrode active material includes a carbon-coated lithium vanadium phosphate and a lithium nickel composite oxide. A negative electrode active material includes a carbon-based active material capable of intercalating and deintercalating lithium ions. When a first charge capacity of a negative electrode per unit area is x (mAh / cm 2 ), and a first charge capacity of a positive electrode per unit area is y (mAh / cm 2 ), a relation of x and y satisfies 0.6 y / x 0.92.

A negative electrode material for a non-aqueous electrolyte secondary battery of the present invention is a negative electrode material for a non-aqueous electrolyte secondary battery capable of reversibly absorbing and desorbing lithium, and it includes a solid phase A and a solid phase B that have different compositions and has a structure in which the surface around the solid phase A is entirely or partly covered by the solid phase B. The solid phase A contains at least one element selected from the group consisting of silicon, tin and zinc, and the solid phase B contains the above-described at least one element contained in the solid phase A, and at least one element selected from the group consisting of Group IIA elements, transition elements, Group IIB elements, Group IIIB elements and Group IVB elements. The atomic arrangement and structure (e.g., crystal structure or amorphous structure) of at least one solid phase selected from the group consisting of the solid phase A and the solid phase B are controlled. It is possible to provide a negative electrode material for a non-aqueous electrolyte secondary battery in which deterioration due to charge / discharge cycle characteristics is suppressed, by using such a material as a negative electrode material for a non-aqueous electrolyte secondary battery. It is also possible to provide a non-aqueous electrolyte secondary battery having excellent charge / discharge cycle characteristics, by including such a negative electrode material for a non-aqueous electrolyte secondary battery.

A negative electrode for a non-aqueous electrolyte secondary battery in the present invention includes an active material including Si, a conductive material, and a binder. The binder is polyimide and polyacrylic acid, and the conductive material is a carbon material.

The invention provides a cathode substrate, a secondary battery using the cathode substrate, a resin compound for forming the cathode substrate and a method for manufacturing the cathode substrate. The cathode substrate may be used to produce batteries having a high output voltage, a high energy density and being superior in charge and discharge cycle characteristics. By means of the cathode substrate (10), a battery having a high output voltage and a high energy density, and being superior in charge and discharge cycle characteristics can be provided, wherein the cathode substrate is characterized in that the cathode substrate is formed by forming a metal film (13) on a support (11) provided with patterned organic film (12) molded by a thermal imprint process or a photoimprint process.

An electrode material is provided. The electrode material includes a porous carbon material, wherein the porous carbon material has a half-width of diffraction intensity peak of a (100) face or a (101) face of 4 degrees or less with reference to a diffraction angle 2 theta on a basis of an X-ray diffraction method. An absolute value of a differential value of mass can be obtained when a mixture of the porous carbon material and S8 sulfur mixed at a mass ratio of 1:2 is subjected to thermal analysis, where temperature is employed as a parameter, has a value of more than 0 at 450° C. and a value of 1.9 or more at 400° C. A battery and method of manufacture are also provided.

The present invention provides a lithium ion secondary battery having high capacity, high working voltage, and excellent load characteristics and excellent charge / discharge cycle characteristics when charges up at a high voltage. The lithium ion secondary battery has a positive electrode containing as an active material LipCoqMa(1-q)O2(A) and a compound (B) represented by general formula, LixNiyCozMb(1-y-z)O2, in a mass ratio of (B) / (A)=0.04 to 0.8, having a positive mix layer having a density of 3.7 g / cm<SP>3< / SP>, wherein,0.5<=p<=1.2, 0<q<=1, 0.5<=x<=1.2, y+z<1, Y>0, z>0, Ma, Mb is at least one element selected from Al, Mn, Fe, Mg, Si, Ti, Zn, Mo, V, Sr, Sn, Sb, W, Ta, Nb, Ge, and Ba.

There is provided an electrode for a lithium secondary battery where particles, composed of an active material capable of occluding and releasing lithium, are arranged on a current collector, the active material particle being directly bonded to the surface of the current collector in a state where the bottom of the active material particle is imbedded in a concave portion formed on the surface of the current collector. A second particle layer may be provided on a first particle layer comprising the active material particles directly bonded to the surface of the current collector.

The present invention provides a negative electrode, which includes: a negative electrode current collector; a first protrusion, which is arranged to extend from the surface of the negative electrode current collector to the outside of the negative electrode current collector, and forms a peeling on at least a part of the surface Propagation preventing part; a negative electrode active material layer, which contains a negative electrode active material, and is provided on at least the top surface of the first convex part. According to this configuration, the peeling of the negative electrode active material layer from the negative electrode current collector and the accompanying reduction in current collection performance can be suppressed, and further deformation of the negative electrode itself can be suppressed. The lithium ion secondary battery containing the negative electrode has high battery capacity and energy density, excellent charge and discharge cycle characteristics, and can continue to perform high output stably for a long time.

The present invention provides a non-aqueous electrolyte second battery which uses a material having Si and O as component elements in a cathode active material, and can ensure good charge-discharge cycling performance and can suppress expansion. The above problem can be solved through the following non-aqueous electrolyte second battery. The non-aqueous electrolyte second battery has an anode having an anode mixture layer containing an anode active material and an adhesive at a single side or two sides of a current collector, wherein the anode mixture layer contains lithium-contained composite oxide to serve as the anode active material, and contains vinylidene fluoride-chlorotrifluoroethylene copolymer to serve as the adhesive, the lithium-contained composite oxide contains specific quantity of nickel to serve as a transition metal element, the non-aqueous electrolyte second battery has a cathode having a cathode mixture layer containing a cathode active material at a single side or two sides of the current collector, wherein the cathode mixture layer contains the material having Si and O as the component element (wherein, atomic ratio x of the O relative to the Si satisfies the formula of 0.5 <= x <= 1.5) and a graphite carbon material to serve as the cathode active material.

The invention provides a positive active material. The positive active material is prepared by the following steps: mixing lithium containing compound, compound containing transition metal which is contained in solid solution, and compound containing metallic element M2 which is different from the transition metal, sintering the compounds into mixture to form composite oxide particles, depositing compound selected from at least one element of sulphur, phosphorus, and fluorine on the surface of the composite oxide particle, and sintering composite oxide particles containing at least one element selected from sulphur, phosphorus, and fluorine on the compound. Thus, each composite oxide particle has such concentration gradient: concentration of the metallic element M2 increases from the center of the composite oxide particle towards the surface, and at least one element selected from at least one element of sulphur, phosphorus, and fluorine exists on the surface of the composite oxide particle in a gathering manner.

The invention discloses a silicon anode of a lithium ion battery. The silicon anode is formed by bonding a conductive agent and an anode material, the anode material comprises anode active matter and a binding material, the anode active matter comprises graphite and silicon dioxide, and the binding material is an organic solvent type binding agent. A conductive agent is of a silicon nanotube ball structure and comprises a plurality of evenly distributed silicon nanotubes, and the anode material is attached to the surfaces of the silicon nanotubes. A carbon material has high electronic conductivity and ionic conductivity, the rate capacity of the silicon material can be improved, and the volume effect of silicone in the circulating process can be inhibited. The silicon anode has high battery capacity and circulating stability.

The lithium secondary battery of the present invention is provided with a positive electrode, a negative electrode, a nonaqueous electrolyte, and a separator, and is characterized by: the positive electrode including a current collector and a positive electrode mixture layer formed on top of the current collector; the positive electrode mixture layer including a positive electrode active material; the positive electrode active material including a lithium-containing complex oxide containing lithium and nickel; the molar ratio of lithium to nickel in the total volume of the lithium-containing complex oxide being 0.5-1.05%; and the nonaqueous electrolyte including 0.5-20% by weight of a phosphonoacetate compound represented in Formula (1). In Formula (1), R1, R2 and R3 all independently represent C1-12 alkyl groups that can be substituted with halogen atoms, and n represents an integer of 0 to 6.

The invention provides an electrolyte solution and an electrochemical component using the same. The electrolyte solution of the invention comprises a main electrolyte (A), an auxiliary electrolyte (B) and a non-aqueous solvent (C). In the electrolyte solution of the invention, the content of the auxiliary electrolyte (B) (wt%) accounts for 0.1 to 20 (wt%) of the total mass of the electrolytes. Since the electrolyte solution of the invention is compounded by the main electrolyte (A) and the auxiliary electrolyte (B), and therefore, the electrolyte solution has the advantages of high electrical conductivity, high electrostatic capacitance and excellent long-term reliability. Through using the electrolyte solution of the invention, an electrochemical component with high energy density and excellent charge-discharge cycle characteristic can be obtained.

A method of producing a non-aqueous electrolyte secondary battery of the present invention includes the steps of: (1) producing a negative electrode precursor by applying a negative electrode slurry including graphite particles and a binder onto a negative electrode core material and drying the same to form a negative electrode material mixture layer; and (2) producing a negative electrode by compressing while heating the negative electrode precursor at a temperature at which the binder softens. In the step (2), a temperature at which the negative electrode precursor is heated and a force with which the negative electrode precursor is compressed are controlled such that the compressed negative electrode material mixture layer in the negative electrode includes 1.5 g or more of the graphite particles per 1 cm3 of the negative electrode material mixture layer, and that an average circular degree of the graphite particles maintains 70% or more of an average circular degree of graphite particles in the negative electrode precursor.

The subject of the invention provides a lithium secondary battery which has the characteristics of excellent charging and discharging circulation, high temperature storage and overcharge under high temperatures. The method for solving the subject employs a lithium secondary battery which employs an anode, a cathode, a membrane and a nonaqueous electrolyte, wherein the anode contains a lithium-containing oxide including Co and / or Mn, the cathode includes a specific amount of carbon materials capable of absorbing and discharging lithium ions, and a material S including at least one element selected from the group composed of Si and Sn; the nonaqueous electrolyte a specific amount of a chemical compound A as a specific Nitrile compound, and at least one compound B selected from the group composed of LiBF4 (boron lithium fluoride), LiN (SO2F)2, LiN (CF3SO2), LiBoB (lithium bis oxalate), LiN (CF3SO2), LiBOB and LiDFOB.

A nonaqueous electrolyte secondary battery, comprising: a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a nonaqueous electrolyte, characterized in that: the positive electrode active material is a lithium transition battery containing Li and Co and having a layered structure Metal oxides, and also contain elements of Group IVA and Group IIA of the Periodic Table of Elements.