Preparation method of passivated lithium powder and metal lithium negative electrode
A technology for passivating lithium and lithium powder, which is applied in metal processing equipment, lithium batteries, battery electrodes, etc., can solve the problems of low-rate charge and discharge of lithium metal negative electrodes, limited applications, and low Coulombic efficiency, so as to suppress or prevent lithium branches. Crystal growth, highly stable rate performance, and highly stable cycle performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] refer to figure 1 , shows a flow chart of the steps of a method for preparing a passivation lithium powder provided by an embodiment of the present invention, which may specifically include the following steps:
[0025] Step 101, ball-milling the lithium foil and urotropine to obtain the ball-milled lithium powder;
[0026] Among them, the molecular formula of urotropine is C 6 H 12 N 4 , has an adamantane structure, is highly symmetrical, has the characteristics of tertiary amines, and each of the four nitrogen atoms has a pair of non-shared electrons, which can form coordination compounds with many inorganic substances, such as alkali metal salts, alkaline earth metal salts, rare earth metals and their Salts and the like react to form complexes. At the same time, urotropine is also a commonly used corrosion inhibitor to slow down the corrosion of metal materials.
[0027] Put the lithium foil and urotropine together into a ball milling container, and perform ball...
Embodiment 2
[0051] 2.5% of the total mass (mass of the passivated lithium powder obtained) and 95% of the total mass (mass of the passivated lithium powder) were mixed and ball-milled for 1 h at a rotating speed of 500 rpm / min. Lithium powder was obtained; then, 2.5% perfluorodecanethiol was added to the lithium powder, accounting for the total mass (mass of the passivated lithium powder finally obtained), and the 500nm passivation was finally obtained by dispersing ball milling at a rotational speed of 500rpm / min for 1h. Lithium powder.
[0052] The passivation lithium powder has good rate performance, and the Li / Li assembled by the passivation lithium powder 2 Zr 0.25 OCl / Li symmetric cells can operate at 5mA / cm 2 It can be cycled stably for 2000 hours at high current density.
Embodiment 3
[0054] 5% of the total mass (mass of the passivated lithium powder obtained) and 90% of the total mass (mass of the passivated lithium powder) were mixed and ball-milled for 1 h at a rotational speed of 500 rpm / min. Lithium powder is obtained; then, 5% perfluorodecanethiol is added to the lithium powder, accounting for 5% of the total mass (the mass of the final passivated lithium powder), and the ball is milled for 1 h at a rotational speed of 500 rpm / min to obtain a passivation of 500 nm. Lithium powder.
[0055] The passivation lithium powder has good rate performance, and the Li / Li assembled by the passivation lithium powder 2 Zr 0.25 OCl / Li symmetric cells can operate at 10mA / cm 2 It can be cycled stably for 2000 hours at high current density.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More