Lithium ion diaphragm containing lithium carbonate coating and preparation method of lithium ion diaphragm

A technology of lithium carbonate and lithium ions, which is applied in the lithium ion diaphragm containing lithium carbonate coating and its preparation field, to achieve the effect of improving cycle life, large economic value and practical value, and increasing lithium ion capacity
CN112952291AInactive Publication Date: 2021-06-11JIANGSU HORIZON NEW ENERGY TECH CO LTD
0 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU HORIZON NEW ENERGY TECH CO LTD
Publication Date
2021-06-11
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 discloses a lithium ion diaphragm containing a lithium carbonate coating and a preparation method of the lithium ion diaphragm. The lithium ion diaphragm mainly comprises a base film and a safety coating coated on the surface of the base film, the safe coating mainly comprises mixed glue, an auxiliary agent and water; and the safe coating is prepared from the following raw material components in percentage by weight of 90 to 93 percent of mixed glue, 5.5 to 6.5 percent of auxiliary agent and the balance of water. The mixed glue mainly comprises a macromolecular glue material and lithium carbonate; and the addition amount of the lithium carbonate in the mixed glue is 0.5-2% of that of the polymer glue material. According to the present invention, the lithium carbonate-containing coating diaphragm disclosed by the invention can quickly provide gas molecules at the early stage of thermal runaway in a battery, so that the time for a safety structure to reach critical air pressure is shortened, and the safety performance of the battery is improved; the special coated diaphragm coating material containing the lithium carbonate component is simple in preparation process and relatively lower in cost, enables the safety of the battery to be remarkably improved, can realize the industrial production, and has higher economic value and practical value.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of lithium ion diaphragms, in particular to a lithium ion diaphragm containing a lithium carbonate coating and a preparation method thereof. Background technique

[0002] Today, the application range of lithium-ion batteries is becoming more and more extensive, and the number of safety incidents in lithium-ion batteries is also increasing. The safety performance of lithium-ion batteries has also become the main technical key for lithium battery manufacturers. Especially for square aluminum shell batteries, since the assembly structure adopts an aluminum metal shell, once thermal runaway occurs, lithium batteries are likely to explode, catch fire and other serious safety incidents. For the sake of safety, the aluminum shell battery is equipped with ①.SSD flip plate (its withstand voltage range is 0.40-0.70MPa); ②. Safety explosion-proof valve (its general pressure is 0.85-0.95Mpa ); ③. Aluminum shell (its pr...

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