High-voltage solid state LIC (Li-ion Capacitor)

Abstract

The invention discloses a high-voltage T-Nb<2>O<5> / RGO solid state LIC (Li-ion Capacitor). The solid state LIC comprises a solid state gel electrolyte, a positive electrode and a negative electrode; each of the positive electrode and the negative electrode is composed of a current collector layer and an electrode material layer attached on the current collector layer; and a preparation method of directly blending an ionic liquid and a polymer into a film is selected by the solid state gel electrolyte. The solid state LIC has excellent properties such as high specific capacity, high energy density, high power density, and fast charging and discharging, etc.

Description

[0001] Technical Field The present invention relates to a high-voltage solid lithium ion capacitor, in particular to a solid lithium ion capacitor with high energy density, high power density and fast charging and discharging; it belongs to the technical field of electrochemical energy. Background technique [0002] Lithium ion capacitor (Li-ion Capacitor, referred to as LIC), also known as electrochemical hybrid capacitor, asymmetric electrochemical capacitor, it belongs to hybrid capacitor in terms of energy storage mechanism, is a kind of lithium ion battery and electric double layer capacitor Among new energy storage devices, it has higher power density than lithium-ion batteries and higher energy density than electric double layer capacitors. Lithium-ion capacitor refers to an electrochemical hybrid capacitor that uses carbonaceous materials such as activated carbon as the positive electrode, lithium intercalation compound materials as the negative electrode, and uses lith...

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Problems solved by technology

In recent reports, V 2 o 5 ,TiO 2 and Li 4 Ti 5 o 15 Nanoscale anode materials have been extensively studied, but due to the slow redox reaction mechanism of these materials, the rate performance of the materials is not ideal

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