electrode

Abstract

To provide electrodes or secondary batteries that degrade less. [Solution] The electrode has a first region and a second region, the first region having silicon particles, and the second region having silicon particles and a graphene compound, with the second region in contact with at least a part of the first region. Alternatively, the electrode may have a plurality of silicon particles and a graphene compound, each of the plurality of silicon particles having a functional group containing oxygen and carbon, a functional group containing oxygen, or a fluorine atom on at least a part of its surface, the graphene compound having at least one of hydrogen-terminated carbon and fluorine-terminated carbon on the surface of the graphene compound, and the graphene compound is an electrode that is in close contact with the plurality of silicon particles. Preferably, the silicon particles are amorphous silicon or polycrystalline silicon.

Claims

1. It comprises first silicon particles, second silicon particles, and a graphene compound, The first silicon particles and the second silicon particles each have at least a portion of their surface having a functional group containing oxygen and carbon, and a functional group containing oxygen, The graphene compound has a functional group containing hydrogen or hydrogen, The graphene compound is in contact with a first point on the surface of the first silicon particle and is in contact with a second point on the surface of the second silicon particle. It has a first distance and a second distance, The first distance is the distance between the first point and the second point on the tangent line passing through the first point and the second point. The second distance is the distance between the first point and the second point in the cross-sectional curve of the graphene compound that passes through the first point and the second point. An electrode in which, when the first distance is taken as 100%, the second distance exceeds 120%.

2. In claim 1, The first silicon particles and the second silicon particles are electrodes having carbonate groups, bicarbonate groups, hydroxyl groups, epoxy groups, or carboxyl groups.

3. In claim 1 or claim 2, The graphene compound has a plurality of carbon atoms and one or more hydrogen atoms, Each of the one or more hydrogen atoms terminates with one of the plurality of carbon atoms, An electrode in which a pore is formed by the plurality of carbon atoms and the one or more hydrogen atoms.

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