Electrode for electricity-storing device, electricity-storing device employing such electrode, and method of manufacturing electrode for electricity-storing device

Abstract

To provide an electricity-storing device and an electrode for an electricity-storing device which, during manufacture and use, have less tendency to experience delamination or loss at active material layer(s) and / or layer(s) provided for short circuit prevention or serving other function(s). Electricity-storing device electrode (10) comprises current collector foil (11); active material layer (12) formed on at least one surface of current collector foil (11); and high-resistance layer (40) formed on surface(s) of current collector foil (11) so as to be adjacent to and in direct contact with active material layer (12); wherein, at least a portion of interface (50) between active material layer (12) and high-resistance layer (40), mixed phase (51) is formed where constituents from the two layers (12, 40) intermingle. By causing mixed phase (51) to be present at interface (50) between active material layer (12) and high-resistance layer (40), the bond between the two adjacent layers (12, 40) is made strong.

Description

Technical field [0001] The present invention relates to an electrode used in an electric storage element such as a battery or an electrochemical capacitor. In addition, it relates to an electric storage element using the electrode, and a method of manufacturing the electrode. Background technique [0002] For applications requiring high density and high output, such as electric vehicles or hybrid vehicles, laminated batteries such as wound electrode batteries are often used. In addition, development of a laminated electrochemical capacitor having a structure similar to these batteries is underway. In laminated batteries or capacitors, there is a structure having an electrode body laminated with a monolithic positive electrode, a negative electrode, and a separator (separator), and there are also those having a positive electrode, a negative electrode, and a separator laminated and wound in a strip shape. The structure of the wound electrode body. [0003] In the positive electro...

AI Technical Summary

Problems solved by technology

[0012] However, even if the short-circuit preventing layer is provided in design, when winding electrode foil and separator in the manufacturing process, when crushing the wound electrode body to make it flat, when handling (handling) the electrode body, etc., The short-circuit prevention layer or the active material layer may peel off or fall off

In addition, there is a problem that the short-circuit prevention layer or the active material layer peels off or falls off due to drops, vibrations, etc. during use of the storage device.

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