Method for preparing high-capacity composite hydrogen storage material calcium borohydride/lithium borohydride ammine
A technology of lithium borohydride and calcium borohydride, which is applied in the field of hydrogen storage technology and new material synthesis, can solve the disadvantages of refuel cells and other problems, and achieve the effects of moderate cost, simple preparation process and easy realization
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[0035] Example 1: At room temperature 25°C, 1g LiBH 4 Put it into a Schlenk test tube under argon gas. After vacuuming the test tube, slowly introduce ammonia gas. Stop feeding ammonia gas when it reaches 0.8 atm. After 20 minutes of reaction, pump the test tube to a vacuum state, and stop after 3 hours of vacuum. Reaction, the product is taken out in argon to obtain LiBH 4 ·NH 3 . Take 0.50g LiBH in the glove box 4 ·NH 3 with 0.90g Ca(BH 4 ) 2 Mix, put into a ball mill jar, seal and take out the ball mill. The ball milling conditions are: the number of revolutions is 400-450 rpm, with stainless steel ball milling balls, the diameter is 0.5-2cm, the ball milling time is 1 hour, the operation mode is alternate restart, and the alternate time is 6 minutes. After ball milling, Ca(BH 4 ) 2 / LiBH 4 ·NH 3 . Mass spectrometry and volumetric tests were performed on the ball-milled samples, and the test results were as follows: figure 1 Shown, raw material, the high-resol...
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