High energy density charge-discharge lithium battery

A high energy density, charge and discharge technology, applied in the field of electrochemistry, can solve the problems of low energy density, poor safety performance, high production cost and other problems of lithium-ion batteries, and achieve excellent stability and cycle performance, high energy effect of density

Inactive Publication Date: 2012-10-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high energy density charge-discharge lithium battery to overcome the problems of low energy density of lithium ion batteries, high production costs, poor safety performance with metal lithium as the negative electrode, and limited capacity of metal lithium / / air batteries.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] 0.1mg / cm 2 The platinum sheet of lithium gallium alloy is the negative electrode, and LiCoO with a reversible capacity of 145 mAh / g 2 It is the active material of the positive electrode, the conductive agent, the binder, and the solvent are the same as those of Comparative Example 1. After being stirred into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. Take the component as 19.75Li 2 O-6.17Al 2 O 3 -37.04GeO 2 -37.04P 2 O 5 (Lithium-containing inorganic oxide) The ceramic membrane is a separator, the negative side is an organic electrolyte (Zhangjiagang Guotai Huarong’s LB315), and the positive side is 1 mol / l LiNO 3 Solution. After sealing, get LiCoO 2 It is a charge-discharge lithium battery with a positive electrode and a lithium gallium alloy as the negative electrode. At 0.1 mA / cm 2 The current is tested, and the charge is 0.1 mA / cm 2 Perform constant current charge, charge to 4.25 V; discharge current is 0.1 mA / c...

Embodiment 2

[0031] The aluminum foil with LiAl alloy formed on the surface is used as the negative electrode, and LiNiO with a reversible capacity of 180 mAh / g 2 It is the active material of the positive electrode, the conductive agent, the binder, and the solvent are the same as those of Comparative Example 1. After being stirred into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. The component is Li 1.5 Al 0.5 Ge 1.5 P 3 S 12 (Lithium-containing sulfide) The ceramic membrane is a separator, and the negative electrode side is an organic electrolyte (0.8 mol / l LiBOB electrolyte dissolved in a 1:1 mass ratio of ethylene carbonate and methyl ethyl carbonate mixed solvent), The positive side is 1 mol / l CH with 1 wt.% polyvinyl alcohol dissolved 3 COOLi gel. After sealing, get LiNiO 2 A charge-discharge lithium battery with positive electrode and lithium aluminum alloy as negative electrode. The test conditions are the same as in Example 1. A...

Embodiment 3

[0035] LiMn with a reversible capacity of 115 mAh / g with metallic lithium as the negative electrode 2 O 4 It is the active material of the positive electrode, the conductive agent, the binder, and the solvent are the same as those of Comparative Example 1. After being stirred into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. Take the component as 0.75Li 2 O-0.3Al 2 O 3 -0.2SiO 2 -0.4P 2 O 5 -0.1TiO 2 (Lithium-containing inorganic oxide) The ceramic membrane is a separator, and the negative side is a composite membrane PVDF / PMMA / PVDF composed of a gel polymer electrolyte (porous polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA)). Organic electrolyte (composed of LB315 from Zhangjiagang Guotai Huarong), 0.5 mol / l Li on the positive side 2 SO 4 Aqueous electrolyte. After sealing, get LiMn 2 O 4 A charge-discharge lithium battery with positive electrode and metal lithium as negative electrode. The test conditions...

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Abstract

The invention, belonging to the technical field of electrochemistry, particularly discloses a high energy density charge-discharge lithium battery. The lithium battery comprises a separator, a cathode, an anode and an electrolyte, wherein the separator is solid, lithium ions can reversibly pass through the separator, the cathode is made of lithium metal or lithium alloy, the electrolyte of the cathode side comprises common organic electrolyte, polymer electrolyte, ionic liquid electrolyte or a mixture thereof, the anode is made of common cathode material of a lithium ion battery, and the electrolyte of the anode side comprises an aqueous solution containing lithium salt or a hydrogel electrolyte. Compared with the traditional lithium ion battery, the charge-discharge lithium battery disclosed by the invention has higher voltage, and the energy density of the charge-discharge lithium battery is more than 30% higher. The high energy density charge-discharge lithium battery can be used in the fields of electricity storage and release, etc.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a high-energy density charge-discharge lithium battery. The invention also relates to the application of the high-energy density charge-discharge lithium battery. Background technique [0002] Lithium-ion battery has the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution. It has good economic, social and strategic significance, and has become the most eye-catching green chemical power source (see: Wu Yuping, Dai Xiaobing, Ma Junqi, Cheng Yujiang. "Lithium Ion Battery-Application and Practice". Beijing: Chemical Industry Press, 2004). However, this type of lithium ion battery has the following shortcomings: (1) Since graphite (theoretical capacity is 372 mAh / g) and other materials as the negative electrode material, although the cycle performance has been improved, it is far lower than the reversib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M2/16H01M10/056H01M10/0525H01M50/409
CPCH01M2300/0094H01M10/056H01M10/0525H01M2/16H01M2300/0002H01M4/134H01M4/382H01M10/0562H01M4/405H01M10/0565H01M2300/0017H01M2/1673Y02E60/122Y02E60/10H01M50/409H01M50/46
Inventor 王旭炯曲群婷刘丽丽侯宇扬吴宇平
Owner FUDAN UNIV
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