Hybrid electrochemical capacitor

A capacitor and electrochemical technology, applied in the direction of hybrid capacitors, hybrid capacitor electrodes, electrolytic capacitors, etc., can solve the problems of limiting the application range of capacitors, failing to meet requirements, low energy density, etc., to achieve improved energy density, convenient matching, power high density effect

Active Publication Date: 2010-05-12
SUZHOU YOURBEST NEW TYPE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Existing PbO 2 / C asymmetric electrochemical capacitors have high power density and long cycle life, but their energy density is significantly lower than that of batteries, which cannot meet the requirements of power batteries for electric vehicles and hybrid vehicles, and cannot meet the energy storage requirements of solar and wind power stations. The requirements of the battery greatly limit the application range of this capacitor.

Method used

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Embodiment 1

[0034] Example 1: Combining figure 1 , figure 2 As shown, in the hybrid electrochemical capacitor provided by this embodiment, two positive plates 1 and three negative plates 2 arranged at intervals are encapsulated in the casing 8, and the spacer between adjacent positive plates 1 and negative plates 2 Plate 3 uses a commercial AGM separator (thickness 0.6mm 10KPa) for continuous coating; and the perfused electrolyte is dilute sulfuric acid (density 1.28g / cm 3 ). The bottom of the positive electrode 1 is connected through the positive electrode bus bar 6 , while the bottom of the negative electrode 2 is connected through the negative electrode bus bar 7 .

[0035] further as image 3 As shown, the positive pole 1 described in this embodiment is a common lead storage battery PbO 2 The positive electrode is composed of a positive electrode current collector 11 and a positive electrode lead paste coated on the positive electrode current collector 11 .

[0036] Described po...

Embodiment 2

[0042] Such as Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the negative electrode current collector 41 is made of a lead-calcium-tin alloy with a calcium content of 0.09% and a tin content of 0.3%. In the shape of a quadruple pole plate, after rolling and drying the double-sided coated capacitive electrode material of the quadruple pole plate, it is aligned and folded into a four-layer structure, and a negative electrode separator 5 is arranged between the layers. Thus, the negative electrode 2 was produced.

[0043] The rest of this embodiment are the same as embodiment 1.

Embodiment 3

[0045] Such as Image 6 As shown, the difference between this embodiment and Embodiment 1 is that the negative electrode current collector 41 is made of a lead-calcium-tin alloy with a calcium content of 0.09% and a tin content of 0.3%. In the shape of a quadruple pole plate, after rolling and drying the capacitor electrode material coated on both sides of the quadruple pole plate, it is aligned and rolled into a four-layer structure, and a negative electrode separator 5 is arranged between the layers. , thus making the negative electrode 2.

[0046] The rest of this embodiment are the same as embodiment 1.

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Abstract

The invention discloses a hybrid electrochemical capacitor comprising a positive electrode, a negative electrode, clapboards and electrolyte, wherein the clapboards are arranged between the positive electrode and the negative electrode. The hybrid electrochemical capacitor is characterized in that the negative electrode is combined by more than two layers of thin carbon powder electrodes and negative clapboards arranged between two adjacent layers of thin carbon powder electrodes. Because an alternately configured combination of multi-layer thin carbon powder electrodes and the negative clapboards is adopted in the negative electrode, an equivalent series resistance in the negative electrode is reduced, moving paths of electrolyte ions are shortened, and specific capacitance and power density are increased. Compared with the traditional designed hybrid electrochemical capacitor, the invention not only has the traditional advantages of high power density and long circulation life of the hybrid electrochemical capacitor, but also has an remarkably improved power density of more than 20 Wh/kg, which can completely meet the requirements for both the power batteries of electric vehicle and hybrid electric vehicles and the energy storage components for solar power stations and wind power stations.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage devices, and in particular relates to a novel hybrid electrochemical capacitor. Background technique [0002] With the continuous development of the economy, energy, resources and the environment have become the focus of society. It is an urgent and arduous task for human society to find clean, renewable and resource-saving energy. [0003] Currently, there are three main types of energy storage devices in the energy field: batteries, physical capacitors, and electrochemical capacitors (also known as supercapacitors). Electrochemical capacitor is a new type of green energy storage device developed in recent years between the characteristics of traditional physical capacitors and batteries. It has fast charge and discharge characteristics, high power density (more than several dozen times that of ordinary batteries), and Long service life (the number of cycles can reach more than 100,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/155H01G9/058H01G9/04H01G11/04H01G11/26
CPCY02E60/13
Inventor 高建峰柳颖张娟孟波郑军伟
Owner SUZHOU YOURBEST NEW TYPE MATERIALS
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