Negative electrode material preparation method, negative electrode material, negative electrode piece and lithium ion battery

A negative electrode material, ionic liquid technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of blocking lithium ion transmission, large specific surface area of ​​materials, and impact on battery life, so as to improve the charging rate and service life, avoid The effect of huge specific surface area, easy production and commercial use
CN108063221AInactive Publication Date: 2018-05-22HUAWEI TECH CO LTD
3 Cites 25 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2018-05-22
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a negative electrode material preparation method, a negative electrode material, a negative electrode piece and a lithium ion battery. The negative electrode material preparation method comprises the following steps: mixing and heating a core material and a heteroelement-containing polymer or a heteroelement-containing ionic liquid; mixing and heating the core material coated with the heteroelement-containing polymer or the heteroelement-containing ionic liquid and functionalized graphene; and sintering the functionalized graphene, the heteroelement-containing polymer orthe heteroelement-containing ionic liquid and the core material to obtain the negative electrode material with the surface of the core material being fixedly coated with the graphene by doping carbon. The negative electrode material preparation method allows the negative electrode material with the core material coated with doped carbon fixed graphene to be obtained through fixing graphene by doping carbon, so graphene is stably fixed on the surface of the core material, and graphene agglomeration is avoided.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present application relates to the field of lithium ion batteries, and more specifically, relates to a method for preparing negative electrode materials, negative electrode materials, negative electrode sheets and lithium ion batteries. Background technique

[0002] With the popularity of electronic products in recent years, lithium batteries as their power sources have become more and more popular due to their advantages such as light weight, small size, high working voltage, high energy density, high output power, high charging efficiency and no memory effect. Pay attention to. However, due to the bottleneck of the energy density of lithium-ion batteries, it has been criticized by users. In view of the fact that the energy density bottleneck of lithium-ion batteries is not easy to break through, researchers are now focusing on the fast charging performance of lithium-ion batteries as the current main research direction, and strive to make the pe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More