Matsushita Electric Industrial Co., Ltd.

Yorihito Ohana

Tatsuya Hashimoto

Yasuhiro Ueyama

Toshikazu Nakamura

Tetsuya Hayashi

Masaru Watanabe

Kunio Tsuruta

Hiroyuki Murai

Hiroshi Matsuno

Hideya Asano

A negative electrode current collector for a non-aqueous electrolyte secondary battery comprising copper or a copper alloy, characterized in that the copper or copper alloy has a ratio I/Iof an intensity Iof a peak attributed to (200) plane to an intensity Iof a peak attributed to (111) plane, which satisfies the equation (1):0.3&#x2266;&#x2266;4.0&#x2003;&#x2003;(1)in an X-ray diffraction pattern measured using CuK&#x3b1; radiation as a radiation source.

Negative electrode current collector, negative electrode using the same, and non-aqueous electrolytic secondary cell

A battery, in which measures are taken to suppress a reduction in charge/discharge capacity and degradation of load characteristics due to peeling of an active material off the current collector during repeated charging and discharging, is disclosed. Boehmite treatment or chromate treatment of the current collector surface of the electrode plate for the battery suppresses the degradation of charge/discharge capacity and load characteristics.

Battery plate and battery

A cell that is excellent in discharge characteristics and cycle characteristics is provided by filtering an active material paste, which contains an active material, a binder resin solution, and a conducting agent added as required, at least one time by a filter while stirring the active material paste in a stirring apparatus that has a stirring blade, and then coating a current collector with the active material paste. An active material paste is circulated and filtered by a feeding pump and a filter while being stirred in a stirring apparatus that has a stirring blade. Then, the active material paste is fed to another filter by a metering pump and filtered, and then, a current collector (backing) is coated with the active material paste. Then, the active material paste is dried in a dry zone and taken up by a take-up roller.

Method for manufacturing a cell electrode

Roll 13 drives base material 12 run continuously, and nozzle 1 applies paint 11 supplied by head 2 on base material intermittently. Head 2 shuts the flow of paint 11 to nozzle 1, when application of paint 11 is suspended, and guides to a place other than nozzle 1, at the same time sucks paint 11 staying in the inside of nozzle 1 and at the exit of slit 7 to sucking part 25 provided in inside of nozzle 1; when application of paint 11 is resumed, releases the flow of paint 11 to nozzle 1, at the same time returns paint 11 that was sucked in sucking part 25 to the inside of nozzle 1; thereby the starting edge and the ending edge of coated areas intermittently applied on the base material can be made to assume a straight line shape, and occurrence of the thicker coating at the starting edge is also prevented.

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Hirakata, Japan

Yorihito Ohana