Self-supporting thick electrode base material and preparation method and application thereof
A matrix material, self-supporting technology, applied in negative electrodes, battery electrodes, active material electrodes, etc., can solve problems such as energy conversion instability, achieve excellent electrochemical energy storage performance, and improve electrochemical performance.
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Embodiment 1
[0053] This embodiment provides a method for preparing a self-supporting thick electrode base material. The preparation method specifically includes the following steps:
[0054] (I) Mix and grind 1.80g polyethyleneimine, 6.80g tetrabutyl titanate and 4.0mL acetic acid to obtain a white powder;
[0055] (II) 0.15 g of the obtained white powder is compressed into a tablet by an infrared tablet press to obtain a disc-shaped substrate with a certain thickness;
[0056] (Ⅲ) Place the wafer substrate with a certain thickness in an oven at 60°C for drying and dehumidification treatment for more than 24 hours, then undergo calcination and reduction treatment in a tube furnace, wherein the initial temperature of the calcination process in the tube furnace is 20°C, and the heating rate is 1°C / min. The temperature is 400°C, and the constant temperature time is 1.5h to obtain a self-supporting thick electrode base material.
[0057] Among them, the self-supporting thick electrode base m...
Embodiment 2
[0060] This embodiment provides a method for preparing a self-supporting thick electrode base material. The preparation method specifically includes the following steps:
[0061] Compared with Example 1, the changes are: in step (Ⅲ), the initial temperature of the tube furnace calcination process is 30°C, the heating rate is 1°C / min, the final temperature is 500°C, and the constant temperature time is 3h.
[0062] TiO 2 -180min sample, in 500°C carbon dioxide atmosphere, carry out 2h reduction treatment, and then 700°C Ar / H 2 atmosphere, followed by 3h reduction treatment to obtain a self-supporting thick electrode substrate, named TiO 2 -b As a lithium battery negative electrode, a series of electrochemical characterization tests were performed.
[0063] Other parameters and experimental conditions are consistent with Example 1.
Embodiment 3
[0065] This embodiment provides a method for preparing a self-supporting thick electrode base material. The preparation method specifically includes the following steps:
[0066] Compared with Example 1, the changes are: in step (Ⅲ), the initial temperature of the tube furnace calcination process is 40°C, the heating rate is 3°C / min, the final temperature is 400°C, and the constant temperature time is 1.5h.
[0067] TiO 2 -180min sample, in 600°C carbon dioxide atmosphere, carry out 2h reduction treatment, and then 700°C Ar / H 2 atmosphere, followed by 3h reduction treatment to obtain a self-supporting thick electrode substrate, named TiO 2 -c As a lithium battery negative electrode, a series of electrochemical characterization tests were performed.
[0068] Other parameters and experimental conditions are consistent with Example 1.
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Abstract
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