摘要:
Provided is a positive electrode material for a safe, high capacity, long lifetime lithium ion secondary battery capable of large current charging and discharging. The positive electrode material contains between 5% by mass or more and 30% by mass or less of a carbon black composite formed by joining together fibrous carbon and carbon black wherein ash is 1.0% or less by mass in accordance with JIS K 1469 and the remainder includes olivine-type lithium iron phosphate, and volatile oxygen-containing functional groups which constitutes 1.0% or less by mass of the positive electrode material. The fibrous carbon is preferably a nanotube having a fiber diameter of 5 nm or more and 50 nm or less and a specific surface area between 50 m2/g or more and 400 m2/g or less.
摘要:
The present invention provides a negative-electrode material for a lithium secondary battery which has a very low resistance, allows the lithium secondary battery to be charged and discharged (high output) at a high current and have a high capacity, and achieve a cycle life to such an extent that the lithium secondary battery can be mounted on a vehicle. The electrode material is composed of (a) at least one active substance (4) selected from among a metal oxide containing metal therein and an alloy material each of which is coated with a carbon material and has a graphene phase or an amorphous phase (8) on at least a surface thereof, (b) a graphite-based carbon material (5) having the graphene phase or the amorphous phase on at least a surface thereof; and (c) carbon material (6) other than the graphite-based carbon material and having the graphene phase or the amorphous phase on at least a surface thereof. The active substance (4), the graphite-based carbon material (5), and the carbon material (6) other than the graphite-based carbon material fuse the graphene phase or the amorphous phase (8a, 8b) thereof together and bond them to each other to form a composite active substance (7) including composed of the active substance including one active substance selected from among the metal oxide containing the metal and the alloy material.
摘要:
The present invention provides a negative-electrode material for a lithium secondary battery which has a very low resistance, allows the lithium secondary battery to be charged and discharged (high output) at a high current and have a high capacity, and achieve a cycle life to such an extent that the lithium secondary battery can be mounted on a vehicle. The electrode material is composed of (a) at least one active substance (4) selected from among a metal oxide containing metal therein and an alloy material each of which is coated with a carbon material and has a graphene phase or an amorphous phase (8) on at least a surface thereof, (b) a graphite-based carbon material (5) having the graphene phase or the amorphous phase on at least a surface thereof; and (c) carbon material (6) other than the graphite-based carbon material and having the graphene phase or the amorphous phase on at least a surface thereof. The active substance (4), the graphite-based carbon material (5), and the carbon material (6) other than the graphite-based carbon material fuse the graphene phase or the amorphous phase (8a, 8b) thereof together and bond them to each other to form a composite active substance (7) including composed of the active substance including one active substance selected from among the metal oxide containing the metal and the alloy material.
摘要:
The present invention provides an electrolyte holder for a lithium secondary battery capable of holding an electrolytic solution inside electrodes or at an interface between the separator and each of the electrodes, preventing electrolyte shortage inside the electrodes, and restraining dendrite from precipitating and growing and also provide the lithium secondary battery, using the electrolyte holder, which is capable of achieving a cycle life to such an extent that the lithium secondary battery can be used for industrial application. An electrolyte holder (3) for use in the lithium secondary battery consists of a multi-layer structure having at least two hydrophilic fibrous layers (A, B) having different porosities. The electrolyte holder (3) is composed of an electrode group formed by winding a cathode (2) and an anode (1) or laminating the cathode (2) and the anode (1) one upon another with an electrolyte holder (3) serving as a separator interposed between the cathode (2) and the anode (1). The organic electrolytic solution is permeated into the electrode group or the electrode group is immersed in the organic electrolytic solution. A porosity (40% to 80%) of the fibrous layer (A) disposed at an interface between the fibrous layer (A) and the anode (1) is set smaller than a porosity (60% to 90%) of the fibrous layer (B) disposed at an interface between the fibrous layer (B) and the cathode (2). An average porosity of the entire fibrous layer is set to not less than 50%. The fibrous layers are formed by using cellulose fibers as a main material thereof. An active substance for use in the anode (1) is a carbon material.
摘要:
To provide an electrode for secondary battery, electrode which can materialize secondary batteries that are adapted into producing high output and additionally whose durability is high.It is characterized in possessing an electrode material that has an active-material powder 11, a conductive material 12 being formed of a carbonaceous material, and being adhered to a surface of said active-material powder 11, and fibrous conductive materials 13 being bonded to said conductive material 12. First of all, it becomes feasible to maintain the electric connection between the active-material powder and the conductive material stably by adhering the conductive material to a surface of the active-material powder. Further, the fibrous conductive materials are bonded to the conductive material that is adhered to a surface of the active-material powder. It is feasible to maintain the electric connection by getting the fibrous conductive materials entangled to each other. That is, it is feasible to keep the electric connection even when strains occur in the electrode material, because the fibrous conductive materials absorb the strains to keep the mutual contacts; even if large strains occur, it is possible to maintain the electric connection, because it is not disconnected compared with that in conventional conductive materials.
摘要:
The present invention provides an electrolyte holder for a lithium secondary battery capable of holding an electrolytic solution inside electrodes or at an interface between the separator and each of the electrodes, preventing electrolyte shortage inside the electrodes, and restraining dendrite from precipitating and growing and also provide the lithium secondary battery, using the electrolyte holder, which is capable of achieving a cycle life to such an extent that the lithium secondary battery can be used for industrial application. An electrolyte holder (3) for use in the lithium secondary battery consists of a multi-layer structure having at least two hydrophilic fibrous layers (A, B) having different porosities. The electrolyte holder (3) is composed of an electrode group formed by winding a cathode (2) and an anode (1) or laminating the cathode (2) and the anode (1) one upon another with an electrolyte holder (3) serving as a separator interposed between the cathode (2) and the anode (1). The organic electrolytic solution is permeated into the electrode group or the electrode group is immersed in the organic electrolytic solution. A porosity (40% to 80%) of the fibrous layer (A) disposed at an interface between the fibrous layer (A) and the anode (1) is set smaller than a porosity (60% to 90%) of the fibrous layer (B) disposed at an interface between the fibrous layer (B) and the cathode (2). An average porosity of the entire fibrous layer is set to not less than 50%. The fibrous layers are formed by using cellulose fibers as a main material thereof. An active substance for use in the anode (1) is a carbon material.
摘要:
To provide an electrode for secondary battery, electrode which can materialize secondary batteries that are adapted into producing high output and additionally whose durability is high.It is characterized in possessing an electrode material that has an active-material powder 11, a conductive material 12 being formed of a carbonaceous material, and being adhered to a surface of said active-material powder 11, and fibrous conductive materials 13 being bonded to said conductive material 12. First of all, it becomes feasible to maintain the electric connection between the active-material powder and the conductive material stably by adhering the conductive material to a surface of the active-material powder. Further, the fibrous conductive materials are bonded to the conductive material that is adhered to a surface of the active-material powder. It is feasible to maintain the electric connection by getting the fibrous conductive materials entangled to each other. That is, it is feasible to keep the electric connection even when strains occur in the electrode material, because the fibrous conductive materials absorb the strains to keep the mutual contacts; even if large strains occur, it is possible to maintain the electric connection, because it is not disconnected compared with that in conventional conductive materials.
摘要:
The present invention provides a method for producing a lithium secondary battery in which peeling of an active substance can be prevented and the generation of metal powder can be prevented when a power collection foil is processed at an electrode production step. The method for producing the lithium secondary battery includes an electrode-producing step of producing a positive electrode and a negative electrode; a step of forming a group of electrodes by layering the positive electrode and the negative electrode on each other through a separator, or winding the positive electrode and the negative electrode through a separator; and a step of immersing the group of the electrodes in an electrolyte. The electrode-producing step has a boring step of forming a plurality of through-holes penetrating a power collection foil and having projected parts projected from at least a rear surface of the power collection foil.
摘要:
The present invention provides a method for producing a lithium secondary battery in which peeling of an active substance can be prevented and the generation of metal powder can be prevented when a power collection foil is processed at an electrode production step. The method for producing the lithium secondary battery includes an electrode-producing step of producing a positive electrode and a negative electrode; a step of forming a group of electrodes by layering the positive electrode and the negative electrode on each other through a separator, or winding the positive electrode and the negative electrode through a separator; and a step of immersing the group of the electrodes in an electrolyte. The electrode-producing step has a boring step of forming a plurality of through-holes penetrating a power collection foil and having projected parts projected from at least a rear surface of the power collection foil and a mixed agent-forming step of forming a mixed agent layer on the power collection foil through which the through-holes have been formed. After the boring step finishes, the mixed agent-forming step is successively performed without winding the power collection foil through which the through-holes have been formed.
摘要:
A high power lithium-ion secondary battery having an increased capacity and capable of maintaining high discharge voltage and repeating charging/discharging high current. A lithium-ion secondary battery having an electrode group formed by laminating or winding a negative electrode layer and a positive electrode layer so as to interpose a separator made of synthetic resin, the negative electrode layer containing a material capable of intercalating/deintercalating lithium-ion, and the positive electrode layer including a lithium-containing metallic oxide; and a non-aqueous electrolyte containing lithium salt, where the electrode group is immersed. The positive electrode material unit contains a fluorinated lithium-containing metallic oxide as a main material, and the separator possesses a hydrophilic group. Further, the positive electrode material preferably contains a main material including LiNixCoyMnzO2, where 0.6≦x
摘要翻译:一种高功率锂离子二次电池,其具有增加的容量并且能够保持高放电电压并且重复充电/放电高电流。 一种锂离子二次电池,其具有通过层压或卷绕负极层和正极层而形成的电极组,以便插入由合成树脂制成的隔膜,所述负极层含有能够插入/脱嵌锂离子的材料 ,所述正极层含有含锂金属氧化物; 和含有锂盐的非水电解质,浸渍电极组。 正极材料单元包含含氟的含锂金属氧化物作为主要材料,隔膜具有亲水性基团。 此外,正极材料优选含有包含LiNixCoyMnzO2的主要材料,其中0.6&lt; 1lE; x <1,0