Composite electrode and battery
A composite electrode and battery technology, applied in the direction of battery electrodes, alkaline storage batteries, alkaline storage battery electrodes, etc., can solve the difficult problem of graphene agglomeration and other problems, and achieve inhibition of branch crystal growth, increase utilization rate, and large conductive area Effect
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[0033] The application provides a kind of preparation method of composite graphene / zinc electrode, comprises the following steps:
[0034] Mix zinc particles, graphene, carbon nanohorns and binders in a certain ratio to obtain a slurry with a certain viscosity. The slurry is coated on the current collector and dried to obtain a composite graphene / zinc electrode.
[0035] An embodiment of the present invention provides a method for preparing a zinc / silver oxide battery, comprising the following steps:
[0036] Silver oxide, carbon conductive agent and binder are mixed to obtain a paste with a certain viscosity. The slurry is coated on the current collector and dried to obtain a silver oxide electrode, which is used as the positive electrode of the zinc / silver oxide battery.
[0037] A graphene / zinc electrode is used as the negative electrode. The positive electrode, the separator and the negative electrode are superimposed, injected with an electrolyte, and packaged to form ...
example 1
[0059] 1. Preparation of carbon nanohorns:
[0060] Carbon nanohorn aggregates were obtained by rapid condensation of carbon atoms under the condition of no catalyst. The average diameter of the obtained single carbon nanohorn is about 3-5 nm, and the average length is about 30-50 nm. The average diameter of the obtained carbon nanohorn aggregates is about 60-120 nm.
[0061] 2. Preparation of reduced graphene:
[0062] Graphene oxide was prepared by the modified Hummers method, followed by thermal reduction treatment of graphene oxide. The dried graphene oxide sheet was placed on a heating platform at about 350 °C and heated rapidly to cause a rapid reduction reaction to generate reduced graphene rGO. 1 g of dried graphene oxide sheets yielded approximately 0.33 g of rGO. During the reduction reaction, the functional groups of graphene oxide disappear to generate CO 2 , CO and H 2 O gas. Graphene oxide is exfoliated during the generation of these gases, resulting in ve...
example 2
[0070] Carbon nanohorn aggregates were obtained by rapid condensation of carbon atoms under the condition of no catalyst. The average diameter of the obtained single carbon nanohorn is about 3-5 nm, and the average length is about 30-50 nm. The average diameter of the obtained carbon nanohorn aggregates is about 60-120 nm.
[0071]Graphene oxide was prepared by the modified Hummers method, followed by thermal reduction treatment of graphene oxide. The dried graphene oxide sheet was placed on a heating platform at about 350 °C and heated rapidly to cause a rapid reduction reaction to generate reduced graphene rGO. 1 g of dried graphene oxide sheets yielded approximately 0.33 g of rGO. During the reduction reaction, the functional groups of graphene oxide disappear to generate CO 2 , CO and H2O gases. Graphene oxide is exfoliated during the generation of these gases, resulting in very low-density rGO sheets. Although the oxygen-containing functional groups partially disappe...
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