44results about How to "Excellent charge/discharge cycle characteristics" patented technology

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.

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.

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 Li_pCo_qMa_(1-q)O₂(A) and a compound (B) represented by general formula, Li_xNi_yCo_zMb_(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 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.

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.