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All solid state limn 2 o 4 ‑li 4 ti 5 o 12 Battery and its preparation method
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An all-solid-state battery technology, applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve problems such as electrolyte leakage, and achieve the effects of simple manufacturing process, easy industrial application, good cycle performance and safety performance
Inactive Publication Date: 2017-07-11
XIAMEN UNIV OF TECH
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However, the organic electrolyte in the battery causes serious fire and electrolyte leakage occurs from time to time
Method used
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preparation example Construction
[0027] Please refer to figure 1 , an all-solid-state LiMn 2 o 4 -Li 4 Ti 5 o 12 A method for preparing a battery, comprising the steps of:
[0028] S1, the LiMn 2 o 4 , conductive agent, solid electrolyte, and aluminum powder are mixed evenly, and hot-pressed to form a positive electrode prefabricated body;
[0029] S2, will Li 4 Ti 5 o 12 , conductive agent, solid electrolyte, and aluminum powder are mixed evenly, and hot-pressed to form a negative electrode prefabricated body;
[0030] S3, placing the two positive electrode preforms and negative electrode preforms on both sides of the current collector aluminum foil and hot pressing to form the positive electrode sheet and the negative electrode sheet respectively;
[0031] S4, forming a solid electrolyte layer on at least one surface of the positive electrode sheet or the negative electrode sheet;
[0032] S5, stacking the positive electrode sheet and the negative electrode sheet alternately, so that the solid e...
Embodiment 1
[0049] Weigh 1gLiMn 2 o 4 , 0.05g conductive carbon black, 0.1g aluminum powder, 0.1g Li perovskite structure 3x La 1-3x TiO 3 Mix evenly, press hot and press at 660°C under an inert atmosphere after pressing to form a positive electrode sheet; weigh 1gLi 4 Ti 5 o 12 , 0.05g conductive carbon black, 0.1g aluminum powder, 0.1g Li perovskite structure 3x La 1-3x TiO 3 Mix evenly, heat-treat at 660°C under an inert atmosphere after tableting to form a negative electrode sheet; sputter Li perovskite structure with a thickness of about 2 microns on one surface of the positive electrode sheet 3x La 1-3x TiO 3 Then put the negative electrode on the positive electrode sheet and put aluminum foil of appropriate size on the back of the positive and negative electrodes. Under moderate pressure, the positive and negative electrodes are bonded with the solid electrolyte, and the aluminum foil is bonded with the positive and negative electrodes to form an electrode Yes; the batte...
Embodiment 2
[0051] It is basically the same as in Example 1, except that both the positive electrode preform and the negative electrode preform contain 0.15 g of aluminum powder. Experiments have proved that the battery capacity has no attenuation after 200 charge-discharge cycles.
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Abstract
The invention discloses an all-solid-state LiMn 2 o 4 -Li 4 Ti 5 o 12 The preparation method of battery comprises the steps of: making LiMn 2 o 4 , conductive agent, solid electrolyte, and aluminum powder are evenly mixed, and pressed to form a positive electrode prefabricated body; the Li 4 Ti 5 o 12 , conductive agent, solid electrolyte, and aluminum powder are mixed evenly, and pressed to form a negative electrode preform; the two positive electrode preforms or negative electrode preforms are placed on both sides of the current collector aluminum foil and heated to make the positive or negative electrode preform and the current collector Aluminum foils are bonded together to form a positive electrode sheet and a negative electrode sheet respectively; a solid electrolyte layer is formed on the surface of the positive electrode sheet or the negative electrode sheet; the positive electrode sheet and the negative electrode sheet are stacked alternately so that the solid electrolyte layer is sandwiched between the positive electrode sheet and the negative electrode Between the sheets, a battery preform is formed after hot pressing; and the moisture in the battery preform is removed, and the aluminum-plastic film is sealed to obtain the all-solid-state LiMn 2 o 4 -Li 4 Ti 5 o 12 Battery. The present invention also provides a kind of all-solid-state LiMn obtained by said method 2 o 4 -Li 4 Ti 5 o 12 Battery.
Description
technical field [0001] The invention relates to an all-solid-state LiMn 2 o 4 -Li 4 Ti 5 o 12 Batteries and methods of making them. Background technique [0002] Most of the electrolytes currently used in lithium batteries contain volatile and flammable organic solvents. In order to manufacture batteries with higher output voltage, higher energy density and larger scale, it is necessary to use electrolytes containing a large amount of organic solvents. However, the organic electrolyte in the battery causes serious fire and electrolyte leakage occurs from time to time. The most effective way to overcome these safety issues and create a reliable battery is to replace the flammable liquid electrolyte with a nonflammable solid electrolyte. Compared with traditional liquid electrolyte batteries, all-solid-state lithium batteries not only have higher energy, but also avoid the corrosion of containers by liquid electrolytes such as acid and alkali, and have the advantages of...
Claims
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