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Preparation method of metal-clad S/Ni-Co-Mn-Li oxide electrode material

A nickel-cobalt-manganese-lithium, electrode material technology, applied in active material electrodes, positive electrodes, battery electrodes, etc., can solve the problems of restricting widespread use, reducing the tap density of sulfur electrode materials, and high prices, achieving convenient operation and beneficial to The effect of industrialized production and simple process

Inactive Publication Date: 2016-02-03
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is undeniable that the carbon material with small pore size effectively limits the particle size of sulfur element, and the good conductivity of carbon material improves the conductivity of elemental sulfur. However, the addition of carbon will reduce the tap density of sulfur electrode material, and the current conductivity The high price of carbon materials with excellent performance virtually limits their widespread use in the preparation of sulfur electrodes

Method used

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  • Preparation method of metal-clad S/Ni-Co-Mn-Li oxide electrode material

Examples

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Effect test

Embodiment 1

[0018] The composition of a metal-coated lithium sulfide / nickel-cobalt-manganese lithium oxide electrode material is designed as:

[0019] LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , 10wt%; Sulfur, 75wt%; Copper, mass fraction 15wt%;

[0020] A preparation method of a copper-coated sulfur / nickel-cobalt-manganese lithium oxide electrode material: comprising the following steps:

[0021] 1) Weigh sulfur, nickel-cobalt-manganese-lithium oxide according to a certain ratio; argon atmosphere, mechanical ball milling for 10 hours;

[0022] 2) Disperse the product of step 1 in a soluble cupric chloride solution and add surfactant, stir for 5h; then slowly add sodium hydroxide solution dropwise; stir for 2h; control the molar ratio of sodium hydroxide to cupric chloride at 2.1; filter and dry dry, and stand at 100°C for 10 hours to obtain copper oxide-coated sulfur / nickel-cobalt-manganese lithium oxide electrode materials;

[0023] 3) Heating the copper oxide-coated sulfur / nickel-cobalt-mangane...

Embodiment 2

[0026] The composition of a silver-coated lithium sulfide / nickel-cobalt-manganese lithium oxide electrode material is designed as:

[0027] LiNi 0.4 co 0.2 mn 0.4 o 2 , 15wt%; Sulfur, 70%; Silver, mass fraction 15wt%;

[0028] A preparation method of a silver-coated sulfur / nickel-cobalt-manganese lithium oxide electrode material: comprising the following steps:

[0029] 1) Weigh sulfur, nickel-cobalt-manganese-lithium oxide according to a certain ratio; in argon atmosphere, mechanically ball mill for 5 hours;

[0030] 2) Disperse the product of step 1 in a soluble silver nitrate solution and add a surfactant, stir for 10 h; then slowly add potassium hydroxide solution dropwise; stir for 5 h; control the molar ratio of potassium hydroxide to silver nitrate at 3; filter and dry, Stand still at 80°C for 10 hours to obtain a silver oxide-coated sulfur / nickel-cobalt-manganese lithium oxide electrode material;

[0031] 3) Heating the silver oxide-coated sulfur / nickel-cobalt-ma...

Embodiment 3

[0034] The composition of a tungsten-coated lithium sulfide / nickel-cobalt-manganese lithium oxide electrode material is designed as:

[0035] LiNi 05 co 0.2 mn 0.3 o 2 , 20wt%; Sulfur, 65%; Tungsten, mass fraction 15wt%;

[0036] A preparation method of a tungsten-coated sulfur / nickel-cobalt-manganese lithium oxide electrode material: comprising the following steps:

[0037] 1) Weigh sulfur, nickel-cobalt-manganese-lithium oxide according to a certain ratio; argon atmosphere, mechanical ball milling for 10 hours;

[0038] 2) Disperse the product of step 1 in soluble tungsten nitrate solution and add surfactant, stir for 5h; then slowly add sodium hydroxide solution dropwise; stir for 2h; control the molar ratio of sodium hydroxide to tungsten nitrate at 2.1; filter and dry, Stand at 100°C for 10 hours to obtain a sulfur / nickel cobalt manganese lithium oxide electrode material coated with tungsten oxide;

[0039] 3) Heat the tungsten oxide-coated sulfur / nickel-cobalt-mang...

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Abstract

The invention relates to a preparation method of a metal-clad S / Ni-Co-Mn-Li oxide electrode material. The metal-coated S / Ni-Co-Mn-Li oxide electrode material is obtained through mechanically milling and mixing S / Ni-Co-Mn-Li oxide and then carrying out metal oxide deposition, diol reduction and drying; the mass of S accounts for 65 to 90 percent of the total mass of the electrode material, the mass of the Ni-Co-Mn-Li oxide accounts for 3 to 20 percent of the total mass of the electrode material, and the mass of clad metal accounts for 7 to 15 percent of the total mass of the electrode material; metal is one or two of Cu, Ag, W and Au; very good specific capacity, excellent multiplying power and excellent circulating performance are obtained when the electrode material is used for a positive electrode of a Li-S battery; the preparation method has a very good application prospect in the field of batteries.

Description

technical field [0001] The invention relates to a method for preparing an electrode material, in particular to a method for preparing a metal-coated sulfur / nickel-cobalt-manganese lithium oxide electrode material. Background technique [0002] Lithium-sulfur batteries are a promising new generation of batteries. However, poor conductivity and volume changes during charging and discharging lead to rapid capacity decay and low sulfur utilization during cycling. The actual specific capacity of currently available lithium-sulfur batteries is much lower than the theoretical specific capacity. Surface modification is a common method to increase the conductivity of sulfur. A large number of literatures and patents use porous conductive carbon materials to support simple sulfur, showing high specific capacity, good cycle performance and excellent rate performance. GengXY (GengXY, RaoM, LiXP.J.SolidState Electrochem., 2013, 17: 987-992.) prepared sulfur / carbon nanotube composites,...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/505H01M4/525H01M4/62H01M4/13H01M4/131H01M4/139H01M4/1391
CPCH01M4/13H01M4/131H01M4/139H01M4/1391H01M4/364H01M4/366H01M4/38H01M4/505H01M4/525H01M4/62H01M2004/028Y02E60/10
Inventor 范美强安彦玲李婷陈金丹曾立伟鞠强建杨秀茹吴汉美陈达陈海潮李超
Owner CHINA JILIANG UNIV
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