Energy storage composite particle, battery negative electrode material and battery
An energy storage composite particle is provided, which includes a carbon film, a conductive carbon component, an energy storage grain, and a conductive carbon fiber. The carbon film surrounds a space. The conductive carbon component and the energy storage grain are disposed in the space. The conductive carbon fiber is electrically connected to the conductive carbon component, the energy storage grain, and the carbon film, and the conductive carbon fiber extends from the inside of the space to the outside of the space. The energy storage composite particle has a high gravimetric capacity, a high coulomb efficiency, and a long cycle life. Furthermore, a battery negative electrode material and a battery using the energy storage composite particle are also provided.
1. An energy storage composite particle, comprising:
a carbon film, surrounding a space;
a conductive carbon component, disposed in the space;
an energy storage grain, disposed in the space;
a conductive matrix, disposed in the space;
a plurality of apertures, disposed in the conductive matrix; and
a plurality of conductive carbon fibers, electrically connected to the conductive carbon component, the energy storage grain and the carbon film, and a portion of the conductive carbon fibers are disposed in the space and another portion of the conductive carbon fibers are extended from the inside of the space to the outside of the space.
2. The energy storage composite particle according to claim 1 , wherein the energy storage grain with a size of 30 nm to 150 nm is selected from a silicon-based nano-grain, a heterogeneous composite nano-grain, and a combination thereof.
3. The energy storage composite particle according to claim 2 , wherein a material of the heterogeneous composite nano-grain is selected from Mg, Ca, Cu, Sn, Ag, Al, SiC, SiO, TiO2, ZnO, Si-Fe-P, Si-P, Si-Fe, Si-Cu, Si-Al, Si-Ni, Si-Ti, Si-Co and a combination thereof.
4. The energy storage composite particle according to claim 2 , wherein the energy storage grain is a silicon-based nano-grain and a heterogeneous composite nano-grain, and a weight percentage of the heterogeneous composite nano-grain is 0.1-5.0 wt % based on a weight of the silicon-based nano-grain.
5. The energy storage composite particle according to claim 1 , wherein a weight percentage of the energy storage grain is 10-50 wt % based on a weight of the energy storage composite particle.
6. The energy storage composite particle according to claim 1 , wherein a weight percentage of the conductive carbon component is 50-80 wt % based on a weight of the energy storage composite particle.
7. The energy storage composite particle according to claim 1 , wherein a material of the conductive matrix is selected from carbon, metal, an organic material, an inorganic material, and a combination thereof.
8. The energy storage composite particle according to claim 1 , wherein a weight percentage of the conductive matrix is 5-10 wt % based on a weight of the energy storage composite particle.
9. The energy storage composite particle according to claim 1 , wherein a material of the carbon film comprises asphalt carbide or resin carbide.
10. The energy storage composite particle according to claim 1 , wherein a specific surface area of the energy storage composite particle is 6-15 m 2 /g.
11. The energy storage composite particle according to claim 1 , wherein the size of the apertures is in a range of 1 nm-1000 nm.
12. A battery negative electrode material, comprising:
the energy storage composite particle according to claim 1 ;
a conductive carbon; and
an adhesive, wherein a weight ratio of the energy storage composite particle, the conductive carbon, and the adhesive is 75:15:10.
13. The battery negative electrode material according to claim 12 , wherein the adhesive comprises aqueous acrylate.
14. A battery, comprising:
an negative electrode plate, disposed with the battery negative electrode material according to claim 12 ;
a positive electrode plate, disposed correspondingly to the negative electrode plate; and
an ion conductive layer, electrically connected to the negative electrode plate and the positive electrode plate.
15. The battery according to claim 14 , wherein a material of the positive electrode plate comprises lithium.
16. An energy storage composite particle, comprising:
a carbon film, surrounding a space;
a conductive carbon component, disposed in the space;
an energy storage grain, disposed in the space; and
a plurality of conductive carbon fibers, electrically connected to the conductive carbon component, the energy storage grain and the carbon film, and a portion of the conductive carbon fibers are disposed in the space and another portion of the conductive carbon fibers are extended from the inside of the space to the outside of the space,
wherein the conductive carbon component, the energy storage grain and the conductive carbon fiber form a three-dimensional conductive network.