High-capacity lithium ion battery anode material and preparing method thereof

A lithium-ion battery and anode material technology, which is applied in the field of high-capacity lithium-ion battery anode materials and its preparation, can solve the problems that the battery capacity of lithium-ion battery anode materials needs to be improved, achieve high specific energy, suppress volume expansion, prevent powder material shedding effect

Inactive Publication Date: 2015-12-09
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the battery capacity of the lithium-ion battery anode material needs to be improved.

Method used

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  • High-capacity lithium ion battery anode material and preparing method thereof
  • High-capacity lithium ion battery anode material and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, a kind of high-capacity lithium-ion battery anode material provided in this embodiment, comprises solid electrolyte layer and nickel oxide supported graphene composite, nickel oxide supported graphene composite is dispersed in the solid electrolyte layer, nickel oxide loaded graphite The particle size of the ene complex is 300 nm, and the outer surface of the solid electrolyte layer is also coated with a conductive coating layer. Wherein, the nickel oxide-loaded graphene composite is distributed in the solid electrolyte layer in the form of a network. Wherein, the solid electrolyte in the solid electrolyte layer is lithium nitride, and the material of the conductive coating layer is carbon. Wherein the thickness of the conductive coating layer is 1 μm.

Embodiment 2

[0035] Embodiment 2 is different from Embodiment 1 in that the solid electrolyte in the solid electrolyte layer is lithium silicate, the particle size of the nickel oxide-loaded graphene composite is 200nm, the material of the conductive coating is polyacetylene, and the conductive coating The thickness of the layer is 2 μm.

Embodiment 3

[0036] Embodiment 3 is different from Embodiment 1 in that the solid electrolyte in the solid electrolyte layer is lithium borate, the particle size of the nickel oxide-supported graphene composite is 800nm, the material of the conductive coating is polythiophene, and the conductive coating is The thickness is 3 μm.

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Abstract

The invention provides a high-capacity lithium ion battery anode material and a preparing method thereof. The lithium ion battery anode material comprises a solid electrolyte layer and nickel oxide load graphene composites. The nickel oxide load graphene composites are dispersed in the solid electrolyte layer. The lithium ion battery anode material has high specific energy, and the service life is remarkably prolonged; powder falling caused by the large size change of the nickel oxide load graphene composites can be prevented, the size expansion of the material can be further inhibited, and therefore deformation of an anode strip is relieved; the solid electrolyte further plays the role of transmitting lithium ions, the reaction between the nickel oxide load graphene composites and electrolyte can be isolated, consumption of the electrolyte is avoided, and the stability of an SEI membrane on the surface of the anode strip is protected.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a high-capacity lithium ion battery anode material and a preparation method thereof. Background technique [0002] At present, the mainstream anode material of lithium-ion batteries is commercialized graphite, which is close to the theoretical capacity of graphite (372mAh / g). Therefore, there is little room for improving the energy density of batteries only by improving graphite anode materials. [0003] Since silicon can react with lithium to form Li3.5Si, it can provide a capacity of up to 3500mAh / g, which is about ten times that of graphite, so it has attracted the interest of many researchers. However, in the alloying reaction, accompanied by a volume change of 300%, problems such as poor electrical contact and severe cycle attenuation limit its commercial promotion (Journal of Power Sources, Volumes 163, 9 November 2006, Pages 1003-1039). [0004] People have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62B82B1/00
CPCB82B1/00H01M4/362H01M4/48H01M4/62Y02E60/10
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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