Battery plate and battery
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTatsuya Hashimoto, Hiroyuki Murai, Yorihito Ohana, Hiroshi Matsuno, Hideya Asano
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Abstract
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.
Claims20
An electrode plate for a battery, the electrode plate comprising:
- (1) a surface having formed thereon an oxide layer, the oxide layer being formed by applying a boehmite treatment to the electrode plate surface, and (2) a layer of an electrode active material on the oxide layer;
- wherein said electrode active material participates in the charge and discharge reactions of said battery.
A method for producing an electrode plate for a lithium secondary battery, the method comprising the steps of:
- providing an electrode plate;
- forming an oxide layer on the electrode plate by applying a boehmite treatment to the electrode plate;
- applying a paste comprising an electrode active material to the oxide layer;
- and
- drying the paste.
A battery comprising, in a battery case;
- a positive electrode;
- a negative electrode;
- an electrolyte between the positive electrode and the negative electrode;
- and a separator between the positive electrode and the negative electrode;
- in which at least one of said positive electrode and said negative electrode comprises (1) an electrode plate comprising a surface having formed thereon an oxide layer, the oxide layer being formed by applying a boehmite treatment to said surface, and (2) a layer comprising an electrode active material on said oxide layer, and wherein said electrode plate comprises aluminum.
Dependencies are inferred from the claim text.