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Preparation method of lithium ion battery anode materials BiPO4 based on chemical conversion reaction and lithium ion battery for manufacturing

A technology for lithium ion batteries and cathode materials, which is applied in chemical instruments and methods, battery electrodes, inorganic chemistry, etc., can solve problems such as the application of lithium ion batteries that have not been reported, and achieve the effects of low cost, good application prospects and environmental friendliness.

Inactive Publication Date: 2013-01-09
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, BiPO 4 It has a wide range of applications in various fields, such as catalysts, sensors, microwave dielectrics, photoelectric catalysis, etc., but there is no report on the application in lithium-ion batteries

Method used

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  • Preparation method of lithium ion battery anode materials BiPO4 based on chemical conversion reaction and lithium ion battery for manufacturing
  • Preparation method of lithium ion battery anode materials BiPO4 based on chemical conversion reaction and lithium ion battery for manufacturing
  • Preparation method of lithium ion battery anode materials BiPO4 based on chemical conversion reaction and lithium ion battery for manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 5 grams of bismuth nitrate in 200 mL of 20% acetic acid solution and stir it for 2 hours at 40°C to dissolve it. Add 1 gram of dispersant polyethylene glycol (2000) and 0.5 gram of emulsifier triethanolamine to the solution. (NH 4 ) 2 HPO 4 Dissolve in 200mL of 20% ethanol solution, add 40°C bismuth nitrate solution dropwise (NH 4 ) 2 HPO 4 solution, the resulting precipitate is hexagonal BiPO 4 , filtered with suction, washed with deionized water, and then dried in a vacuum oven at 80° C. for 24 hours to obtain the product. After heat treatment at 600°C and 900°C for 6 hours, respectively, low-temperature single-crystal and high-temperature single-crystal BiPO were obtained. 4 .

[0042] The positive electrode material, graphite, acetylene black, and polyvinylidene fluoride were weighed according to the weight ratio of 8:0.5:0.5:1, mixed evenly, coated on the current collector, dried and rolled into positive electrode sheets. The new positive electrode ma...

Embodiment 2

[0047] Weigh 6 g of bismuth subnitrate in 300 mL of 25% acetic acid solution and stir at 30° C. for 4 hours to dissolve it. Add 100 mL of dispersant ethanol, 0.5 g of OP emulsifier, and 3.4 g of Na 3 PO 4 Dissolve in 100mL 25% ethanol aqueous solution. The bismuth subnitrate solution was added dropwise to Na 3 PO 4 solution drops, the resulting precipitate is the hexagonal BiPO 4 , filtered with suction, washed with deionized water, and then dried in a vacuum oven at 70° C. for 24 hours to obtain the product. After heat treatment at 650°C and 1000°C for 4 hours, respectively, low-temperature single-crystal and high-temperature single-crystal BiPO were obtained. 4 .

[0048] The positive electrode material, conductive carbon black, and polyvinylidene fluoride were respectively weighed according to the weight ratio of 7:2:1, mixed evenly, coated on the current collector, dried and rolled to form a positive electrode sheet. The new positive electrode material BiPO with thr...

Embodiment 3

[0050] Weigh 10 g of bismuth sulfate in 400 mL of 10% acetic acid solution and stir at 35° C. for 5 hours to dissolve it. Add 100 mL of dispersant ethanol, 1 g of OP emulsifier, and 8 g of H 3 PO 4 Dissolved in 250mL15% ethanol aqueous solution. Bismuth sulfate solution was added dropwise to H 3 PO 4 solution, the resulting precipitate is hexagonal BiPO 4 , filtered with suction, washed with deionized water, and then dried in a vacuum oven at 60° C. for 24 hours to obtain the product. After heat treatment at 700°C and 1100°C for 2 hours, respectively, low-temperature single-crystal and high-temperature single-crystal BiPO were obtained. 4 .

[0051] The positive electrode material, graphene and polyvinylidene fluoride were weighed according to the weight ratio of 9:0.5:0.5. After mixing evenly, apply it on the current collector, dry and roll it into a positive electrode sheet, and the electrolyte is LiClO 4 (EC:PC), the separator is polypropylene, and the negative elec...

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Abstract

The invention discloses a preparation method of lithium ion battery anode materials BiPO4 based on a chemical conversion reaction and a lithium ion battery for manufacturing. The invention has the technical effects that a preparation method of lithium ion battery anode materials BiPO4 based on a chemical conversion reaction and a lithium ion battery for manufacturing are provided, wherein the anode materials BiPO4 include a hexagonal crystal type containing crystal water, a low-temperature single crystal type without crystal water, and a high-temperature single crystal type. The anode materials BiPO4 have a theoretical output voltage of about 3.1V, a theoretical specific discharge capacity of 265.5mAh g<-1>, a theoretical mass energy density of 830.5Whkg<-1>, and a volume energy density of 5253.1Wh L<-1>; and all first specific discharge capacities under the multiplying power of 0.1C are greater than 240mAhg<-1>. According to the preparation method of lithium ion battery anode materials BiPO4 based on a chemical conversion reaction, the preparation process is simple and easy to control, the raw materials are low in cost, and the anode materials are environment-friendly, can be produced industrially on a large scale, and are potential novel anode materials. The prepared three different crystal types of anode materials BiPO4 can be applied to lithium ion batteries, thereby having an excellent application prospect.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material, which belongs to the field of lithium ion battery cathode materials and electrochemistry. Background technique [0002] As a new energy source, lithium-ion batteries have attracted much attention due to their high energy density, high voltage, high reversible capacity, and high cycle performance. They are the leading power source in the 21st century, and their application fields are constantly expanding. However, the competition in the lithium-ion battery industry is very fierce. Finding high-performance, low-cost new electrode materials is a powerful means to further reduce battery costs and enhance competitiveness, and positive electrode materials account for a large proportion of battery manufacturing costs, about 40%. , therefore, cathode materials are the focus of research on lithium-ion batteries. [0003] At present, almost all commercial lithium-ion battery cathode materials are ...

Claims

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Application Information

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IPC IPC(8): C01B25/37H01M4/58H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 王先友胡本安杨秀康舒洪波魏启亮宋云峰吴昊吴春鞠博伟易兰花
Owner XIANGTAN UNIV
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