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Lithium-iron disulfide anode materials and method for preparing same

A technology of iron disulfide battery and positive electrode material, which is applied to the electrodes, battery electrodes, circuits and other directions of primary batteries, and can solve problems such as no technical solutions for modification treatment of natural iron disulfide materials.

Inactive Publication Date: 2006-12-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching, there is no technical solution for using this method to modify the natural iron disulfide material in the existing published literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one. Take by weighing natural iron disulfide fine powder 25g. Add 10 g of absolute ethanol and ball mill for 5 hours in a ball mill jar full of nitrogen. The ball-milled iron disulfide material was baked in a vacuum oven at 120° C. for 6 hours. Weigh 0.5g of conductive graphite and mix evenly with ball-milled iron disulfide material, disperse in a beaker with 50ml of deionized water, and add 1mol / l TiCl 4 Solution 12ml. Then, under magnetic stirring, add 12ml of 4mol / l ammonia solution to make it mix with TiCl 4 The solution carries out metathesis reaction (when using other metal salt solutions, the addition amount of alkali solution is also determined according to the theoretical stoichiometric ratio of carrying out metathesis reaction with the metal salt used). After reacting for 1 hour under stirring, filter the product, wash it several times with deionized water, bake it in a common oven at 60°C for 10 hours, and finally bake it at 400°C for 15 hours i...

Embodiment 2

[0027] Embodiment two. Take by weighing natural iron disulfide fine powder 25g. Add 25g of acetone and ball mill for 30 hours in a ball mill jar full of nitrogen. The iron disulfide material after ball milling was baked in a vacuum oven at 60°C for 24 hours. Weigh 1g of acetylene black and mix it evenly with ball-milled iron disulfide material, disperse it in a beaker filled with 80ml deionized water, and add 1mol / l MgCl 2 Solution 18ml. Then, under magnetic stirring, add 18ml of 2mol / l ammonia solution to make it mix with MgCl 2 The solution undergoes a metathesis reaction. After reacting under stirring for 30 minutes, filter the product, wash it several times with deionized water, and bake it in a common oven at 120°C for 2 hours, and finally bake it at 200°C for 24 hours in a nitrogen atmosphere to obtain the coating described in this patent. Conductivity of MgO and good voltage platform of FeS 2 Composite cathode material. The material was used for battery testing, a...

Embodiment 3

[0028] Embodiment three. Take by weighing natural iron disulfide fine powder 25g. Add 15g of cyclohexanone and ball mill for 15 hours in a ball mill jar full of nitrogen. The iron disulfide material after ball milling was baked for 2 hours under vacuum at 200°C. Take by weighing the mixture of 2.5g conductive graphite and acetylene black (conductive graphite: acetylene black=2: 1) the ferric disulfide material after ball milling is evenly mixed, is dispersed in the beaker that 150ml deionized water is housed, and adds 1mol / l AlPO 4 Solution 6ml, then, under magnetic stirring, add 3mol / l ammonia solution 6ml, make it mix with AlPO 4 The solution undergoes a metathesis reaction. After reacting for 1 hour under stirring, filter the product, wash it several times with deionized water, bake it in a common oven at 80°C for 6 hours, and finally bake it at 600°C for 10 hours in a nitrogen atmosphere to obtain the package described in this patent. Cover Al 2 o 3 FeS with good con...

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Abstract

The invention discloses a preparing technology of high-energy Li-marcasite battery material, which comprises the following steps: covering conductivity and stable metal oxide on the surface of marcasite with composite conductive; setting the percentage of marcasite at 82-94 percent, conductive percentage at 4-10 percent and metal oxide percentage at 2-8 percent. The method reduces grain size of natural marcasite material through wetting ball grinding technology, which prepares the needed anode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium battery materials, in particular to the preparation technology of high-energy lithium-iron disulfide battery materials. Background technique [0002] Lithium / iron disulfide battery is a high-energy and environmentally friendly primary lithium battery composed of lithium metal as the negative electrode and iron disulfide as the positive electrode. It is a new type of energy storage device that has only been developed in recent years. The working voltage of the battery is 1.5V, which can be used interchangeably with any 1.5V battery. It has a stable discharge platform, long storage life and excellent safety performance. The theoretical capacity of the positive electrode material of the battery is 890mAh / g, and the capacity of a single AA battery is about 3000mAh. When used in a heavy-load situation, its power performance is 4 to 10 times that of an alkaline manganese battery. At pres...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/06H01M4/08B22F1/00B22F1/02B22F9/00
Inventor 蒲薇华何向明王莉任建国李建军姜长印万春荣
Owner TSINGHUA UNIV
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