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A kind of organic nano negative electrode based on intercalation type pseudocapacitance and its preparation method and application
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A pseudocapacitive, organic technology, applied in the field of energy devices, to achieve the effect of improving reversible capacity and good electronic conductivity
Active Publication Date: 2021-07-20
SUZHOU UNIV
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Problems solved by technology
But so far, there are few reports on the application of organic materials in the negative electrode of lithium-ion hybrid capacitors.
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Embodiment 1
[0044] This embodiment provides an organic nano-anode based on an intercalated pseudocapacitance and its preparation method and application, specifically:
[0045] (1) Preparation of 2,2'-bipyridyl-4,4'-dicarboxylic acid electrode and performance test of lithium ion battery
[0046] (1) Place the 2,2'-bipyridyl-4,4'-dicarboxylic acid material in a blast drying oven and dry at 120°C for 8 hours;
[0047] (2) At room temperature, weigh 0.5g 2,2'-bipyridine-4,4'-dicarboxylic acid, 0.4g conductive carbon black and 0.1g binder (polyvinylidene fluoride, commercially available), grind 10 minutes, then add 20ml of solvent (N-methylpyrrolidone), stir well, grind by high-energy ball mill for 2 hours, and then evenly coat on copper foil;
[0048] (3) Drying at 60°C for 3 hours, followed by vacuum drying at 120°C to obtain 2,2'-bipyridyl-4,4'-dicarboxylic acid pole pieces;
[0049] (4) Use the 2,2'-bipyridyl-4,4'-dicarboxylic acid electrode obtained in step (3) as the negative electrode...
Embodiment 2
[0066] This embodiment provides an organic nano negative electrode based on an intercalation type pseudocapacitance and its preparation method and application, which is basically the same as that in Example 1, except that the organic electrode material is fumaric acid, and its full battery Table 1 shows the maximum energy density, maximum power density and battery voltage data.
Embodiment 3
[0068] This embodiment provides an organic nano negative electrode based on an intercalation type pseudocapacitance and its preparation method and application, which is basically the same as that in Example 1, except that the organic electrode material is sodium citrate, and the maximum capacity of the full battery is The energy density, maximum power density and battery voltage data are shown in Table 1.
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Abstract
The invention discloses an organic nano negative electrode based on an intercalation type pseudocapacitance, which comprises an active material, a conductive agent and a binding agent, and the active material is an organic molecular crystal material. The present invention uses nanometerized organic molecular crystal materials as negative electrode materials for lithium-ion batteries or lithium-ion hybrid capacitors, etc., so that organic nanocrystals can fully contact with the conductive agent in the electrode, have good electronic conductivity, and can significantly improve the performance of lithium-ion batteries. The reversible capacity and energy density of Li-ion hybrid capacitors.
Description
technical field [0001] The invention belongs to the field of energy devices and relates to an organic nano negative electrode, in particular to a nano organic negative electrode with an ultra-high intercalation type pseudocapacitive lithium ion storage specific capacity and a preparation method and application thereof. Background technique [0002] At present, electrochemical energy storage devices, such as lithium-ion batteries and supercapacitors, have been widely used in people's daily life and vehicles, and have also triggered people's further pursuit of high energy density / power density. Lithium-ion batteries are currently the system with the highest energy density in actual application batteries, but the power density is relatively low; on the contrary, supercapacitors have excellent power density and cycle life, but there is a serious shortcoming in energy density. The above-mentioned performance difference is mainly determined by the difference in the working mechani...
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