A dry method for preparing composite electrodes for battery capacitors
A composite electrode and battery capacitor technology, applied in battery electrodes, electrode manufacturing, electrode rolling/calendering, etc., can solve the problems of electrode density decrease, device charge and discharge capacity decrease, etc., to improve compaction density, increase energy density and Effects of cycle life and simple preparation method
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Embodiment 1
[0029] LiMnPO 4 , activated carbon, additive S metallocene complex, PTFE and carbon nanotubes are mixed at a ratio of 44:44:2:5:5, and mixed at a high speed for 1h to form a positive electrode dry powder; the obtained mixed powder is passed through a powder press at 5t-40t Press down to make a 145μm thick continuous positive electrode dry electrode film; on the front and back of the 20μm thick corroded aluminum foil, evenly coat a 3μm thick conductive adhesive by dip coating, and apply the above conductive adhesive layer to a dry electrode film with the same width Put it on the conductive glue, and pass through the hot roller, the composite film is thinned and pressed tightly on the porous aluminum foil to obtain a positive composite electrode with a thickness of 260 μm, the rolling ratio is 19%, and the electrode density is 1.31g / cm 3 , compared with the conventional wet electrode, the rolling ratio is 12%, and the electrode density is 1.13g / cm 3 . In the composite electro...
Embodiment 2
[0031]Mix artificial graphite, hard carbon, PTFE and carbon nanotubes at a ratio of 68:22:5:5, and mix at high speed for 1 hour to form a negative electrode mixed dry powder; press the obtained mixed powder into a continuous dry electrode with a thickness of 55 μm Diaphragm. On the front and back of the 9μm thick copper foil, apply a 2μm thick conductive adhesive evenly by dip coating, place the dry electrode film with the same width as the above conductive adhesive layer on the conductive adhesive, and pass it through a hot rolling roller, The composite film is thinned and pressed tightly on the porous aluminum foil to obtain a negative composite electrode with a thickness of 100 μm, a rolling ratio of 19%, and an electrode density of 1.38 g / cm 3 , compared with the conventional wet electrode, the rolling ratio is 11%, and the electrode density is 1.08g / cm 3 . In the composite electrode obtained by this method, the composite network formed by PTFE and CNT is respectively em...
example 3
[0033] Will LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , carbon airgel, additive S (metal-naphthalene complex), PVDF and conductive carbon black are mixed at a ratio of 30:58:1:5:6, and mixed at a high speed for 1h to form a positive electrode dry powder; the obtained mixed powder is passed through a powder press In the case of 5t-40t, it is pressed into a continuous positive dry electrode film with a thickness of 130 μm; On the front and back of the 20μm thick corroded aluminum foil, evenly apply a 3μm thick conductive adhesive by dip coating, place the dry electrode film with the same width as the above conductive adhesive layer on the conductive adhesive, and pass it through a hot roller. The composite film is thinned and pressed tightly on the porous aluminum foil to obtain a positive composite electrode with a thickness of 250 μm, a rolling ratio of 18%, and an electrode density of 1.35 g / cm 3 , compared with the conventional wet electrode, the rolling ratio is 10%, and the electrode...
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Abstract
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