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Solid lithium ion-super-capacitor hybrid battery

A lithium-ion battery and supercapacitor technology, applied in the field of electrochemical energy, can solve the problem of no contribution to the capacity of lithium-sulfur batteries, and achieve excellent mechanical and puncture resistance, improved stability, and high energy density.

Active Publication Date: 2017-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects existing in the existing lithium-ion batteries, the object of the present invention is to provide a lithium-ion battery-supercapacitor hybrid battery with excellent performances such as high specific capacity, high energy density, high power density, fast charging and discharging; Solve the disadvantage that the addition of carbon sources in traditional lithium-ion batteries does not contribute to the capacity of lithium-sulfur batteries, thereby improving the electrochemical performance of traditional lithium-sulfur batteries

Method used

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Embodiment 1

[0038] Elemental sulfur-loaded carbon nanotubes are used as the positive electrode active material, Super-P is used as the conductive agent, acrylic resin (PAA) is used as the binder, and N-methyl-pyrrolidone (NMP) is used as the solvent, according to the mass ratio of 8:1:1 After being stirred into a uniform slurry, it is coated on an aluminum foil, and metal lithium is used as the active material of the negative electrode. A polyoxyethylene solid electrolyte membrane, specifically a solid electrolyte membrane containing LiI and a mixture containing LiTFSI and porous activated carbon (its preparation process: dissolve 0.08g of MIL-53(Al) and 0.23g of LII in 9mL of acetonitrile , stirred for 2 hours, added 0.4g PEO, stirred for 24 hours, volatilized the solvent at room temperature for 6 hours, and then volatilized at 80°C for 24 hours to obtain a polymer electrolyte membrane. In the same procedure, 0.23g LiTFSI and 0.23g porous activated carbon were replaced by LiI ) as a comp...

Embodiment 2

[0040] Use elemental sulfur-loaded graphene as the positive electrode active material, Super-P as the conductive agent, acrylic resin (PAA) as the binder, and N-methyl-pyrrolidone (NMP) as the solvent, and stir according to the mass ratio of 8:1:1 After forming a uniform slurry, it is coated on an aluminum foil, and metal lithium is used as the active material of the negative electrode. Polyoxyethylene is used as a solid electrolyte membrane, specifically, a solid electrolyte membrane containing LiCl is used in combination with a mixture containing LiTFSI and graphene (the preparation process: 0.08g of MIL-53(Al) and 0.23g of LII are dissolved in 9mL of In acetonitrile, stir for 2 hours, add 0.4g PEO, stir for 24 hours, volatilize the solvent at room temperature for 6 hours, and then volatilize at 80°C for 24 hours to obtain a polymer electrolyte membrane. In the same step, replace 0.23g LiTFSI and 0.46g graphene LiCl) as a composite solid electrolyte for batteries, and then a...

Embodiment 3

[0042] Elemental sulfur-loaded carbon nanotubes are used as the positive active material, carbon nanotubes and metal lithium are used as the negative active material, Super-P is used as the conductive agent, acrylic resin (PAA) is used as the binder, and N-methyl-pyrrolidone ( NMP) as a solvent, stirred into a uniform slurry according to the mass ratio of 8:1:1, and then coated on aluminum foil and copper foil respectively to make positive electrode sheets and negative electrode sheets. Polyoxyethylene solid electrolyte membrane (preparation process: dissolve 0.08g of MIL-53(Al) and 0.23g of LITFSI in 9mL of acetonitrile, stir for 2h, add 0.4g of PEO, stir for 24h, and evaporate the solvent at room temperature 6h, and then volatilized at 80°C for 24h to obtain a polymer electrolyte membrane.) As a separator of a hybrid battery and a lithium-ion conducting material, then drop 1-2 drops of TEABF on the surface of the positive electrode material and the electrolyte membrane 4 / AN...

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Abstract

The invention discloses a solid lithium ion-super-capacitor hybrid battery. The battery comprises a lithium ion battery anode, an electrolyte, a lithium / carbon material composite cathode and a shell, wherein the electrolyte consists of a super-capacitor electrolyte and a lithium salt solid electrolyte membrane; the super-capacitor electrolyte is arranged between the lithium ion battery anode and the lithium salt solid electrolyte membrane; or the electrolyte consists of at least two layers of lithium salt solid electrolyte membranes with anionic lithium salts with different radiuses; the lithium salt solid electrolyte membranes are arranged in a gradient manner from one end of the lithium ion battery anode to the lithium / carbon material composite cathode according to the radiuses of the lithium salt anions from small to large; one or more than two layers of lithium salt solid electrolyte membranes close to one end of the lithium / carbon material composite cathode comprise carbon-containing materials. The solid lithium ion-super-capacitor hybrid battery has excellent properties of high specific capacity, high energy density, high power density, rapid power charging and discharging, and the like.

Description

technical field [0001] The invention relates to a solid-state lithium ion-supercapacitor hybrid battery, in particular to a battery with high energy density, high power density and fast charging and discharging energy storage; it belongs to the technical field of electrochemical energy. Background technique [0002] With the increasing demand for electronic equipment, portable communication tools and power vehicles in people's daily life, countries are accelerating the pace of developing a new generation of clean energy, so people's demand for secondary batteries represented by lithium-ion batteries is also increasing . Although lithium-ion batteries have the advantages of small size, large capacity, and high voltage, they are widely used in mobile phones, laptop computers and other electronic products, and the ever-expanding fields of electric vehicles, but how to obtain higher energy density and higher power density, Batteries with more excellent high-rate charging perfor...

Claims

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Application Information

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IPC IPC(8): H01G11/08H01M10/058H01M10/36
CPCH01G11/08H01M10/058H01M10/36Y02E60/10Y02E60/13Y02P70/50
Inventor 刘晋李劼张智林月程昀
Owner CENT SOUTH UNIV
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