摘要:
An electrochemical device comprises, at least, a first electrode, a second electrode, and an electrolyte layer having an ionic conductivity. The first and second electrodes oppose each other by way of the electrolyte layer. The first and second electrodes comprise a composite particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder adapted to bind the electrode active material and conductive auxiliary agent to each other. In the composite particle, the electrode active material and conductive auxiliary agent are electrically coupled to each other without being isolated.
摘要:
An electrochemical device comprises, at least, a first electrode, a second electrode, and an electrolyte layer having an ionic conductivity. The first and second electrodes oppose each other by way of the electrolyte layer. The first and second electrodes comprise a composite particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder adapted to bind the electrode active material and conductive auxiliary agent to each other. In the composite particle, the electrode active material and conductive auxiliary agent are electrically coupled to each other without being isolated.
摘要:
The composite particle for an electrode in accordance with the present invention contains an electrode active material, a conductive auxiliary agent having an electronic conductivity, and an oxidizing/reducing agent. Therefore, this composite particle can construct an effective conductive network, and effectively provide so-called oxidizing/reducing capacity due to the oxidizing/reducing agent. Hence, when the composite particle for an electrode in accordance with the present invention is used as a constituent material of an electrode in an electrochemical device, the electrochemical device can realize a higher capacity.
摘要:
The composite particle for an electrode in accordance with the present invention contains an electrode active material, a conductive auxiliary agent having an electronic conductivity, and an oxidizing/reducing agent. Therefore, this composite particle can construct an effective conductive network, and effectively provide so-called oxidizing/reducing capacity due to the oxidizing/reducing agent. Hence, when the composite particle for an electrode in accordance with the present invention is used as a constituent material of an electrode in an electrochemical device, the electrochemical device can realize a higher capacity.
摘要:
The coating liquid for forming an electrode in accordance with the present invention includes, as constituents, a granulated particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder capable of binding the electrode active material and conductive auxiliary agent to each other; and a liquid adapted to disperse or dissolve the granulated particle, whereas the granulated particle is formed by way of a granulating step of preparing a material liquid containing the binder, the conductive auxiliary agent, and a solvent, and then attaching the material liquid to a surface of a particle made of the electrode active material and bringing a particle made of the binder and a particle made of the conductive auxiliary agent into close contact with the surface. An electrode is formed by using the coating liquid for forming an electrode, whereas an electrochemical device is equipped with the electrode.
摘要:
The invention provides an electrode 1 comprising a collector 1a with electron conductivity and an electrode active material-containing layer 1b with electron conductivity formed on the collector 1a, wherein the electrode active material-containing layer 1b includes conductive polymer-covered carbon nanotubes.
摘要:
A nonaqueous solvent in a nonaqueous electrolytic solution in a lithium-ion secondary battery 1 contains propylene carbonate (PC), a first compound expressed by formula (I), and a second compound expressed by formula (II). The content of PC in the nonaqueous solvent is at least 10 volume %. The content X [mass %] of the first compound and the content Y [mass %] of the second compound simultaneously satisfy the conditions represented by expressions (1) and (2) [2≦(X+Y)≦8 (1), 0.01≦(Y/X)≦0.30 (2)]. R1 to R6 in formula (I) indicate any of a hydrogen atom and hydrocarbon groups having a carbon number of 1 to 3, whereas R7 and R8 in formula (II) indicate any of a hydrogen atom and hydrocarbon groups having a carbon number of 1 to 3.
摘要:
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.
摘要:
A lithium-ion secondary battery 1 comprises an anode including a conductive anode active material containing layer containing an anode active material; a cathode including a conductive cathode active material containing layer containing a cathode active material; a nonaqueous electrolytic solution containing a lithium salt, propylene carbonate, and a linear carbonate; and a case accommodating the anode, cathode, and nonaqueous electrolytic solution in a closed state. The nonaqueous electrolytic solution further contains an additive satisfying the condition represented by expression (1): +0.9V≦(E2−E1)≦+2.5V, whereas the moisture content in the anode active material containing layer is regulated so as to satisfy the condition represented by expression (2): 40 ppm≦C1≦100 ppm. E1 is the standard electrode potential (V vs. SHE) of a redox pair Li/Li+, and E2 is the standard electrode potential (V vs. SHE) of a redox pair in the additive in expression (1); and Cl is the moisture content in 1 g of the material constituting the anode active material containing layer in expression (2).
摘要:
The invention aims to provide a lithium secondary battery exhibiting the improved function of self safety in an abnormal state without sacrificing battery characteristics. To attain the object, in a lithium secondary battery comprising a positive electrode (3a, 3b), a negative electrode (2a, 2b), an electrolytic solution, and a separator, a plurality of positive electrodes (3a, 3b) and negative electrodes (2a, 2b) are arranged to construct an electrode structure which includes an outermost layer of electrode on which a back coat layer (11) is formed.