Lithium Ion Capacitor

一种电容器、锂离子的技术，应用在锂离子电容器领域，能够解决单体各种特性变差、电解液粘度内阻上升等问题，达到特性变化小、低内阻的效果

Active Publication Date: 2017-12-08
TAIYO YUDEN KK
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

Regarding the low-temperature characteristics, it is considered that the dissociation of the electrolyte in the electrolyte solution becomes difficult to occur or the viscosity of the electrolyte solution increases, and the internal resistance increases. Regarding the high-temperature reliability, it is considered that the PF as the electrolyte 6 － Decomposition products such as hydrogen fluoride and other anions are decomposed, so various characteristics of the monomer are deteriorated

Method used

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Embodiment Construction

[0031] Hereinafter, the present invention will be described in detail with appropriate reference to the accompanying drawings. However, the present invention is not limited to the forms shown in the drawings, and the characteristic parts of the invention are sometimes emphasized in the drawings, so the accuracy of the scale of each part of the drawings is not guaranteed.

[0032] figure 1 It is a schematic diagram of a lithium ion capacitor as an example of an electrochemical capacitor. figure 1 (A) is a plane perspective view, figure 1 (B) is an exploded view, figure 1 (C) is a cross-sectional view. A lithium ion capacitor includes, for example, an electric storage element 50 having a positive electrode 10 , a negative electrode 20 , and a separator 30 between the positive electrode 10 and the negative electrode 20 , and a can 70 for accommodating the electric storage element 50 . Here, a pair of terminals 41 and 42 are connected to the positive electrode 10 and the negat...

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Abstract

A lithium ion capacitor has an electrolytic solution that contains: 100 parts by volume of a solvent containing 20 to 50 parts by volume of propylene carbonate, 10 to 35 parts by volume of dimethyl carbonate, and 15 to 70 parts by volume of ethyl methyl carbonate; and lithium bis(fluorosulfonyl)imide, as an electrolyte. The lithium ion capacitor can maintain its initial high capacitance and low internal resistance, while also undergoing minimal characteristics changes in a low-temperature environment, even after exposure to a high-temperature, high-voltage environment.

Description

technical field [0001] The present invention relates to lithium ion capacitors. Background technique [0002] An electric double layer capacitor using a non-aqueous electrolytic solution can increase a withstand voltage and store a large amount of energy because the electrolysis voltage of the solvent is high. In particular, lithium-ion capacitors have a larger capacitance per unit volume than electric double-layer capacitors, and can have a longer life than lithium-ion secondary batteries by reducing the discharge depth of the negative electrode and using a polarizable positive electrode material. In recent years, lithium ion capacitors have been required to reduce internal resistance at low temperatures and ensure reliability at high temperatures. Regarding the low-temperature characteristics, it is considered that the dissociation of the electrolyte in the electrolyte solution becomes difficult to occur or the viscosity of the electrolyte solution increases, and the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/60H01G11/62
CPCH01G11/60H01G11/62C01B21/086H01G11/06Y02E60/13
Inventor 续木武男
Owner TAIYO YUDEN KK
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