Positive electrode, electrochemical device and electronic device that uses the same positive electrode
AssigneeNingde Amperex Technology Limited
InventorsDongdong Han, Kefai Wang, Qingwen Zhang
Life of this patent
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Abstract
A positive electrode including a positive current collector, a positive active material layer, a bonding layer and a conductive layer. The bonding layer is disposed between the positive current collector and the positive active material layer. The conductive layer is disposed between the bonding layer and the positive active material layer. The conductive layer includes a conductive agent with a weight percent of 20 wt % to 95 wt % and a binder with a weight percent of 5 wt % to 80 wt %. This helps to improve the cycle performance and the high-temperature storage performance of the electrochemical device.
Claims20
A positive electrode, comprising:
- a positive current collector, a positive active material layer, a bonding layer and a conductive layer;
- wherein the bonding layer is disposed between the positive current collector and the positive active material layer, the conductive layer is disposed between the bonding layer and the positive active material layer, the conductive layer comprises a conductive agent and a first binder;
- and
- based on a total weight of the conductive layer, a content of the conductive agent is 40 wt % to 85 wt % and a content of the first binder is 15 wt % to 60 wt %.
An electrochemical device, comprising a positive electrode;
- the positive electrode comprises a positive current collector, a positive active material layer, a bonding layer and a conductive layer;
- wherein the bonding layer is disposed between the positive current collector and the positive active material layer, the conductive layer is disposed between the bonding layer and the positive active material layer, the conductive layer comprises a conductive agent and a first binder;
- and
- based on a total weight of the conductive layer, a content of the conductive agent is 40 wt % to 85 wt % and a content of the first binder is 15 wt % to 60 wt %.
An electronic device, comprising an electrochemical device;
- the electrochemical device comprises a positive electrode;
- the positive electrode comprises a positive current collector, a positive active material layer, a bonding layer and a conductive layer;
- wherein the bonding layer is disposed between the positive current collector and the positive active material layer, the conductive layer is disposed between the bonding layer and the positive active material layer, the conductive layer comprises a conductive agent and a first binder;
- and
- based on a total weight of the conductive layer, a content of the conductive agent is 40 wt % to 85 wt % and a content of the first binder is 15 wt % to 60 wt %.
Dependencies are inferred from the claim text.