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A kind of lithium-ion capacitor battery and preparation method thereof

A capacitor battery and lithium-ion technology, which is applied in the field of lithium-ion capacitor batteries and its preparation, can solve the problems of poor cycle stability of electrode materials, and achieve the effects of enhancing electrochemical activity, accelerating transfer, and improving stability

Active Publication Date: 2022-05-17
PENGSHENG GUONENG (SHENGZHEN) NEW ENERGY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a lithium-ion capacitor battery and its preparation method, to solve the technical problem of poor cycle stability of traditional electrode materials

Method used

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  • A kind of lithium-ion capacitor battery and preparation method thereof

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Embodiment 1

[0032] A preparation method for a lithium-ion capacitor battery, comprising the steps of:

[0033] (1) Preparation of positive electrode: 80g LiCoO 2 , 10g of binder PVDF and 10g of conductive agent tantalum were added to 300mL of N-methyl-2-pyrrolidone and dispersed evenly to obtain a positive electrode slurry, which was then coated on a 15μm thick aluminum foil, dried and rolled to form a positive electrode ;

[0034] (2) Preparation of negative electrode: 90g nitrogen-doped porous carbon supported MoS 2 Nanoflowers and 10g of binder PVDF were added to 300mL of N-methyl-2-pyrrolidone, dispersed uniformly to obtain a negative electrode slurry, and then the resulting negative electrode slurry was coated on a 12 μm thick copper foil, dried and rolled to form a negative electrode; Nitrogen-doped porous carbon supported MoS 2 The preparation steps of nanoflowers are as follows:

[0035] Add 45g of 3,3'-diaminobenzidine into 300mL of tetrahydrofuran solvent, stir evenly, then ...

Embodiment 2

[0041] A preparation method for a lithium-ion capacitor battery, comprising the steps of:

[0042] (1) Preparation of positive electrode: 80g LiCoO 2 , 12g of binder PVDF and 6g of conductive agent tantalum were added to 300mL of N-methyl-2-pyrrolidone, and dispersed evenly to obtain a positive electrode slurry, and then the obtained positive electrode slurry was coated on a 15 μm thick aluminum foil, dried and rolled to form a positive electrode ;

[0043] (2) Preparation of negative electrode: 90g nitrogen-doped porous carbon supported MoS 2 Nanoflowers and 12g of binder PVDF were added to 300mL of N-methyl-2-pyrrolidone, dispersed uniformly to obtain negative electrode slurry, and then the resulting negative electrode slurry was coated on a 12 μm thick copper foil, dried and rolled to form a negative electrode; Nitrogen-doped porous carbon supported MoS 2 The preparation steps of nanoflowers are as follows:

[0044] Add 54g of 3,3'-diaminobenzidine into 300mL of tetrahy...

Embodiment 3

[0050] A preparation method for a lithium-ion capacitor battery, comprising the steps of:

[0051] (1) Preparation of positive electrode: 80g LiCoO 2 , 12g of binder PVDF and 8g of conductive agent tantalum were added to 300mL of N-methyl-2-pyrrolidone, dispersed uniformly to obtain a positive electrode slurry, and then the obtained positive electrode slurry was coated on a 15 μm thick aluminum foil, dried and rolled to form a positive electrode ;

[0052] (2) Preparation of negative electrode: 90g nitrogen-doped porous carbon supported MoS 2 Nanoflowers and 13g of binder PVDF were added to 300mL of N-methyl-2-pyrrolidone, dispersed uniformly to obtain negative electrode slurry, and then the resulting negative electrode slurry was coated on a 12 μm thick copper foil, dried and rolled to form a negative electrode; Nitrogen-doped porous carbon supported MoS 2 The preparation steps of nanoflowers are as follows:

[0053] Add 62g of 3,3'-diaminobenzidine into 300mL of tetrahyd...

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Abstract

The invention discloses a lithium-ion capacitor battery and a preparation method thereof, comprising four steps of preparing an anode, preparing a cathode, preparing an electrolyte and preparing a lithium-ion capacitor battery. Larger, which is conducive to the generation of more electrochemically active sites on its surface, and at the same time can increase its reaction contact area with the electrolyte, speed up the reaction process, and thus effectively improve the ratio of nano-molybdenum disulfide-based electrode materials. Capacity and electrochemical activity, due to the rich pore structure of nitrogen-doped porous carbon materials, molybdenum disulfide nanoflowers can grow in situ in these pore structures, which can slow down the accumulation and agglomeration of molybdenum disulfide nanoflowers to a certain extent , while also avoiding molybdenum disulfide in Li + The problem of volume expansion occurs during the continuous intercalation and extraction process, which effectively improves the cycle stability and rate performance of nano-molybdenum disulfide-based electrode materials.

Description

technical field [0001] The invention relates to the technical field of capacitor batteries, in particular to a lithium-ion capacitor battery and a preparation method thereof. Background technique [0002] Lithium-ion capacitor battery, also known as lithium-ion capacitor or lithium-ion hybrid supercapacitor, is usually assembled from battery-type materials (negative electrode) and capacitive material (positive electrode) in an electrolyte containing lithium salt. Lithium-ion capacitor batteries are also With the advantages of lithium-ion batteries and supercapacitors, it has become a promising new energy storage system with its advantages of high energy density, high power density, long cycle life and fast charge and discharge. However, the power between battery-type electrodes and capacitive electrodes Key problems such as chemical imbalance, less ideal energy density and poor cycle stability still exist. To effectively solve this problem, it is necessary to develop new pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/50H01G11/48H01G11/86
CPCH01G11/50H01G11/48H01G11/86Y02E60/13
Inventor 朱少敏刘春燕
Owner PENGSHENG GUONENG (SHENGZHEN) NEW ENERGY GRP CO LTD
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