Lithium squarate and preparation method and application thereof

A technology of lithium squaraine and squaraine, applied in the field of energy storage, can solve the problems of low electrochemical performance, prone to agglomeration, cumbersome preparation process of lithium squaraine, etc., and achieves a simple preparation process, low cost, and improved electrochemical activity. Effect
CN113443973AActive Publication Date: 2021-09-28EAST CHINA UNIV OF SCI & TECH
3 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2021-09-28

Smart Images

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

Abstract

The invention discloses lithium squarate and a preparation method and application thereof, and is characterized in that the preparation method comprises the following steps: mixing a lithium source aqueous solution and a squaric acid aqueous solution for reaction, further preparing a reaction product into powder, and sequentially dissolving with water, quick-freezing and freeze-drying. The lithium squarate is prepared by adopting the preparation method, and the thickness of the lithium squarate is 50-100nm. The preparation method is simple in process, and the uniform nanosheet with the thickness of 50-100nm is obtained only through simple freeze-drying treatment. The decomposition voltage of the prepared lithium squarate is greatly reduced, meanwhile, the electrochemical activity is greatly improved, in addition, the lithium squarate can also be used as a lithium supplementing agent to be applied to a lithium-sulfur battery and / or a lithium ion battery.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of energy storage, and in particular relates to a lithium squarylate and its preparation method and application. Background technique

[0002] When the lithium-ion battery is activated during the first cycle of charging, lithium ions will be extracted from the positive electrode material and embedded in the negative electrode material. In this process, the battery will consume a part of lithium ions to form a solid electrolyte film (SEI film) on the surface of the negative electrode. This part of the consumed lithium ions will undoubtedly directly cause the loss of battery capacity. At present, most commercial batteries on the market use graphite as the negative electrode. The irreversible capacity loss of graphite is generally about 10%, which is acceptable, but for silicon-based and tin-based negative electrodes with high specific capacity, the irreversible capacity loss is generally above 30%. , which un...

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