Lithium battery cathode material, cathode, lithium battery, preparation method and communication equipment thereof

A negative electrode material, lithium battery technology, applied in the direction of battery electrodes, electrolyte storage battery manufacturing, nanotechnology for materials and surface science, etc., can solve the problems of complex preparation process, complicated preparation process, difficult commercialization, etc., to avoid preparation The effect of complex process, reduced production cost, and mature process technology

Inactive Publication Date: 2014-05-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, this existing nanonization method also has disadvantages: reducing the dimension of the material does not fundamentally solve the inherent volume expansion, shrinkage and poor conductivity of the material, and the effective size of the nanoparticle particle size <10nm is in the process of industrialization. It is also difficult to achieve in
[0010] However, this existing thin film method also has disadvantages: at present, thin film materials are mainly prepared by methods such as chemical vapor deposition, magnetron sputtering, pulsed laser deposition, vacuum evaporation coating, etc. The preparation process is complicated and the cost is high , it is difficult to quickly mass-produce, and the commercialization process is limited
[0013] However, this existing composite method also has disadvantages: the A / metal alloy system can improve the electrical conductivity of the A material, but there are still problems of particle breakage and pulverization, which limit its further development; A / carbon composites usually occupy a relatively large amount of carbon. Large specific gravity, less A content, thus weakening the high capacity advantage of the material
[0014] It can be seen from the above that no matter which of the above existing methods is adopted, the effect is not ideal, or the preparation process is complicated, it is difficult to realize commercialization, or the introduction of a large amount of inactive substances greatly weakens the advantage of the high capacity of A material

Method used

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  • Lithium battery cathode material, cathode, lithium battery, preparation method and communication equipment thereof
  • Lithium battery cathode material, cathode, lithium battery, preparation method and communication equipment thereof
  • Lithium battery cathode material, cathode, lithium battery, preparation method and communication equipment thereof

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[0072] In one embodiment, the nanomaterial 1 is a nano-element particle and / or a nano-alloy particle, the organic group 2 is uniformly bonded to the surface of the nanomaterial 1, and the metal particle 3 is adsorbed on the organic group 2, so that the metal particle 3 is evenly distributed around the nanomaterial 1, so that the microstructure of the negative electrode material of the lithium battery is spherical or approximately spherical, and its structure is as follows figure 1 shown.

[0073] In another embodiment, the nanomaterial 1 is at least one of nanowires, nanotubes, and nanofibers, the organic group 2 is uniformly bonded to the surface of the nanomaterial 1, and the metal particles 3 are adsorbed on the organic group 2, In this way, the metal particles 3 are evenly distributed around the nanomaterial 1, so that the microstructure of the negative electrode material of the lithium battery is similar to that of nanowires, nanotubes or / and nanofibers, the figure is omi...

Embodiment 1

[0125] A lithium battery negative electrode material and preparation method thereof, lithium ion battery:

[0126] The lithium battery negative electrode material has a microstructure such as figure 1 As shown, the lithium battery negative electrode material includes a nanomaterial 1 that can be alloyed with lithium, an organic group 2 bonded to the surface of the nanomaterial 1 and a metal particle 3 adsorbed on the organic group 2 . Wherein, the nanomaterial 1 is in electrical contact with the metal particle 3 through an organic group 2, the nanomaterial 1 is a 100nm silicon particle; the organic group 2 is p-aminophenylacetic acid; the metal particle 3 is an Ag particle.

[0127] The lithium battery negative electrode material preparation method is as follows:

[0128] Pretreatment: Add 0.1g of silicon powder with an average diameter of about 100nm to 20mL of organic solvent, and then add 0.3mL of NH 4 Solution F (4% by mass) was stirred for 5 minutes to remove the oxide ...

Embodiment 2

[0136] A lithium battery negative electrode material and preparation method thereof, lithium ion battery:

[0137] The lithium battery negative electrode material, its microstructure refers to the lithium battery negative electrode material prepared in Example 1.

[0138] The lithium battery negative electrode material preparation method is as follows:

[0139] Pretreatment: add 0.1g of silicon powder with an average diameter of 100nm to 5mL of organic solvent, then add 0.3mL of HF solution (4% by mass) and react for 30min under stirring conditions to remove the oxide layer on the surface of silicon particles;

[0140] Bonding organic groups on the surface of the nano-silicon material: adding 0.025 g of p-aminobenzenesulfonic acid and 0.5 mL of organic esters to the solution in the pretreatment step, and reacting for 20 h under stirring conditions. Suction filter the obtained product, and wash with absolute ethanol until the filtrate is colorless, and then dry the obtained po...

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Abstract

The invention discloses a lithium battery cathode material and a preparation method thereof, a lithium battery cathode and a preparation method thereof, a lithium battery and a preparation method thereof, and communication equipment. The lithium battery cathode material comprises a nano-material able to undergo alloying with lithium, an organic group bonded to the surface of the nano-material and a metal particle adsorbed on the organic group, wherein the nano-material and the metal particle are in electrical connection through the organic group. The lithium battery cathode, the lithium battery and the communication equipment all contain the lithium battery cathode material. The lithium battery cathode material has the advantages of stable volume and structure, and strong conductivity, so that the lithium battery can have stable electrochemical performance in charge-discharge cycles, high capacity, and long life.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a lithium battery negative electrode material and a preparation method thereof, a lithium battery negative electrode and a preparation method thereof, a lithium battery and a preparation method thereof, and communication equipment. Background technique [0002] At present, with the increasing demand for high-capacity and long-life batteries for mobile electronic devices, people have put forward higher requirements for the performance of lithium-ion batteries. The low capacity of lithium-ion batteries has become a bottleneck restricting the development of the battery industry. Therefore, looking for cathode materials and anode materials with higher specific capacity has become a development direction in the field of battery materials. Anode materials are an important part of lithium-ion batteries, which restrict the commercialization process of lithium-ion batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/134H01M4/1395H01M10/058
CPCB82Y30/00B82Y40/00H01M4/134H01M4/1395H01M4/38H01M4/624H01M4/628H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 杨胜男
Owner HUAWEI TECH CO LTD
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