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Lead-carbon supercapacitor

A supercapacitor, lead-carbon technology, applied in capacitors, electrolytic capacitors, double-layer capacitors, etc., can solve the problems of not meeting the requirements of auxiliary power supply, limiting the application range of capacitors, and not reaching energy storage batteries, etc., so as to avoid softening Shedding, compact structure, small size effect

Active Publication Date: 2019-04-16
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing PbO2 / C asymmetric electrochemical capacitor has high power density and long cycle life, but its energy density is relatively low, so after the capacitor is combined, the volume is too large and the energy density is lower, which cannot reach the level of electric vehicles and The requirements for the auxiliary power supply of the power battery of the hybrid electric vehicle cannot meet the requirements of the energy storage battery and the auxiliary power supply of the solar and wind power stations, which greatly limits the application range of the capacitor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Reference Figure 9 As shown, the lead-carbon supercapacitor of the present invention includes a positive plate, a carbon negative plate, five lead-carbon bipolar plates 4, a diaphragm 3 and an electrolyte between adjacent plates; the diaphragm 3 is AGM Separator, the electrolyte is dilute sulfuric acid electrolyte; according to the orderly arrangement and assembly of the positive plate, multiple lead-carbon bisexual plates 4 and carbon negative plates, an acid-resistant rubber sealing strip 6 is arranged between the plates, and the fixing bolts 7 are used to position the electrodes The plate is pressed and fixed to prepare the lead-carbon supercapacitor of the embodiment, and the nominal voltage is 12 volts.

[0046] combine figure 1 , figure 2 and Figure 2a As shown, the lead-carbon bipolar plate 4 is composed of a plastic frame 5, a current collector 11, a positive electrode active material 12 and a carbon negative electrode 2; the current collector 1...

Embodiment 2

[0058] Embodiment 2: The lead-carbon supercapacitor of the present invention adopts two lead-carbon bipolar plates, and the corresponding nominal voltage is 6 volts. combine figure 1 , figure 2 and Figure 2b As shown, the front of the current collector 11 is designed with a rhombus grid, and its grid size is: 120mm×80mm×1.0mm (length×width×depth).

[0059] In this embodiment, the weight percent of each component in the organic conductive adhesive is: 25% of the conductive agent, 75% of the organic binder; wherein the conductive agent is a mixture of graphite and carbon black; the organic binder It is a mixture of styrene-butadiene rubber and neoprene. The ratio is: graphite 10%, carbon black 15%, styrene-butadiene rubber 37.5% and neoprene 37.5%.

[0060] In this embodiment, the size of the carbon negative electrode is: 120mm × 80mm × 2.0mm (length × width × thickness); the size of the stretched net collector is: 115mm × 75mm × 0.8mm (length × width × thickness), and its...

Embodiment 3

[0065] Embodiment 3: The lead-carbon supercapacitor of the present invention adopts twenty-three lead-carbon bipolar plates, and the corresponding nominal voltage is 48 volts. combine figure 1 , image 3 and Figure 3a As shown, in the supercapacitor with lead-carbon bipolar electrodes of this embodiment, the lead-carbon bipolar electrodes 4 adopt a circular design, and the size of the plates is: 170 mm in diameter and 8.0 mm in thickness; the plastic frame 5 has a width of 25 mm and a thickness of 8.0mm. The size of the current collector 11 is: 140mm in diameter, 2.5mm in thickness, its front is designed as a rectangular grid, the grid size: 110mm in diameter, 2.0mm in depth, and the rib width is 1.0mm.

[0066] combine Figure 4 , Figure 6 and Figure 6a As shown, the carbon negative electrode 2 in this embodiment adopts a circular design, and the size of the carbon negative electrode is 110 mm in diameter and 2.5 mm in thickness; the size of the stretched current col...

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Abstract

The invention discloses a lead-carbon supercapacitor which comprises a positive plate, a carbon negative plate, a plurality of lead-carbon bipolar plates, diaphragms and electrolyte, wherein the diaphragms are arranged between adjacent polar plates. Each diaphragm is an AGM separator, and the electrolyte is a dilute sulfuric acid electrolyte. The positive plate, the plurality of lead-carbon bipolar plates and the carbon negative plate are sequentially arranged and assembled. Acid-resistant rubber sealing strips are arranged among the polar plates. The polar plates are positioned by fixing bolts, and then are pressed and fixed. Each lead-carbon bipolar plate is composed of a plastic frame, a current collector, a positive active material and a carbon negative electrode. A current collector is embedded into the plastic frame. The current collector is a lead plate of which the front surface is provided with a grid-shaped groove. The positive active substance is embedded in the groove, andthe back surface of the current collector is flat-plate-shaped. A carbon negative electrode is bonded by using an organic conductive adhesive. The supercapacitor is compact in structure and small in size, and has high power density and high energy density.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage devices, and in particular relates to a lead-carbon supercapacitor with a bipolar structure plate. Background technique [0002] With the continuous development of the national economy, energy, resources and the environment have become the focus of society. Finding clean, renewable and resource-saving energy is an urgent and arduous task for human society. [0003] Currently, there are three main types of energy storage devices in the energy field: various types of batteries, physical capacitors, and electrochemical capacitors (also known as supercapacitors). Electrochemical capacitors are a new type of green energy storage device developed in recent years between traditional physical capacitors and batteries. Long (the number of cycles can reach more than 100,000 times), and the operating temperature range is wide (between -40°C and 75°C). Based on these unique properties, electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/04H01G11/12H01G11/26H01G11/28H01G11/30H01G11/38H01G11/68H01G11/70H01G11/86
CPCH01G11/04H01G11/12H01G11/26H01G11/28H01G11/30H01G11/38H01G11/68H01G11/70H01G11/86Y02E60/13
Inventor 高建峰
Owner SUZHOU UNIV
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