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Cathode electrode composite material and preparation method thereof and electrochemical device applying same

A negative electrode and composite material technology, which is applied in the direction of alkaline battery electrodes, nickel batteries, alkaline batteries, etc., can solve the problems that the battery energy density and power density cannot meet the power supply requirements for power, and the electric capacity of iron electrodes is not high. The effect of improving charge and discharge characteristics, low production cost, and simple process

Inactive Publication Date: 2011-10-12
NATIONAL TSING HUA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the shortcomings of the low capacitance of the iron electrodes made in the past, the energy density and power density of the overall battery cannot meet the power supply requirements for power. Accordingly, improving the battery capacitance and charge and discharge characteristics is an important goal of the present invention

Method used

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  • Cathode electrode composite material and preparation method thereof and electrochemical device applying same
  • Cathode electrode composite material and preparation method thereof and electrochemical device applying same
  • Cathode electrode composite material and preparation method thereof and electrochemical device applying same

Examples

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Effect test

Embodiment 1

[0032] Formulated with FeSO 4 ·7H 2 O(2.3352g) and Fe 2 (SO 4 ) 3 ·7H 2 O (8.94 g) in water and bubbled with nitrogen for 5 minutes. Then, add sodium hydroxide, the pH value of aqueous solution is adjusted to 11-12, and keep stirring for 30 minutes, to generate about 2g of ferric oxide (Fe 3 o 4 ). Then, using a magnet to separate the ferric oxide (Fe 3 o 4 ), and wash several times, then add CuSO 4 ·5H 2 O (1.834g, as a conductive additive), Na 2 S·9H 2 O (0.09g) and polytetrafluoroethylene (PTFE, 0.22g, as a binder) to make a slurry (ie negative electrode composite material). Finally, the slurry is coated on the collector grid (ie, the negative electrode substrate) to form a negative electrode coating, and then a negative electrode is produced.

[0033] After the negative electrode prepared in this embodiment is charged, the copper sulfate (as a conductive aid) in the negative electrode will be reduced to nano-copper, which will be dispersed in the reduced iron...

Embodiment 2

[0036] Formulated with FeSO 4 ·7H 2 O(2.3352g) and Fe 2 (SO 4 ) 3 ·7H 2 O (8.94 g) in water and bubbled with nitrogen for 5 minutes. Then, add sodium hydroxide, adjust the pH value of the aqueous solution to about 12, and continue to stir for 30 minutes, to generate about 2g of ferric oxide (Fe 3 o 4 ). Then, using a magnet to separate the ferric oxide (Fe 3 o 4 ), and cleaned several times, then added nano-Cu (0.467g, as a conductive additive), Na 2 S·9H 2 O (0.09g) and polytetrafluoroethylene (PTFE, 0.22g, as a binder) to make a slurry (ie negative electrode composite material). Finally, the slurry is coated on the collector grid (ie, the negative electrode substrate) to form a negative electrode coating, and then a negative electrode is produced.

[0037] In this embodiment, iron oxide particles (Fe 3 o 4 Particles) have a diameter of about 20nm to 100nm; while iron oxide particles (ie Fe 3 o 4 Particles) to the weight ratio of the conductive additive (ie na...

Embodiment 3

[0039] Formulated with FeSO 4 ·7H 2 O(2.3352g) and Fe 2 (SO 4 ) 3 ·7H 2 O (8.94 g) in water and bubbled with nitrogen for 5 minutes. Then, add sodium hydroxide, adjust the pH value of the aqueous solution to about 12, and continue to stir for 30 minutes, to generate about 2g of ferric oxide (Fe 3 o 4 ). Then, add CuSO 4 ·5H 2 O (1.834g), and adjust the pH value of the aqueous solution to about 12 (CuSO 4 ·5H 2 O is formed as Cu(OH) 2 ), and then suction and filter to collect the powder (Cu(OH) 2 with Fe 3 o 4 homogeneous mixture), and dry. Subsequently, the dried powder was mixed with Na 2 S·9H 2 O (0.09g) and polytetrafluoroethylene (PTFE, 0.22g, used as a binder) were evenly mixed to make a slurry (ie negative electrode composite material). Finally, the slurry is coated on the collector grid (ie, the negative electrode substrate) to form a negative electrode coating, and then a negative electrode is produced.

[0040] After the negative electrode prepared ...

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Abstract

The invention discloses a cathode electrode composite material, which comprises a plurality of ferriferous oxide particles and a conductive aid which is selected from copper, cobalt, nickel, tin, antimony, bismuth, indium, silver, gold, lead, cadmium, carbon black, graphite, cupric salt, cobalt salt, nickel salt, tin salt, antimonic salt, bismuth salt, indium salt, silver salt, gold salt, lead salt, cadmium salt, cupric hydroxide, cobalt hydroxide, nickel hydroxide, tin hydroxide, stibine hydroxide, bismuth hydroxide, indium hydroxide, silver hydroxide, gold hydroxide, lead hydroxide, cadmium hydroxide and a group consisting of the combinations. When applied to an electrochemical device, the cathode electrode composite material can show high charging and discharging characteristics and high electric capacity. Moreover, the invention provides a preparation method of the cathode electrode composite material and an electrochemical device applying the same.

Description

technical field [0001] The invention relates to a negative electrode composite material, its preparation method and an electrochemical device using it, in particular to a negative electrode composite material suitable for nickel-iron batteries, its preparation method and its electrochemical device. Background technique [0002] With the rising awareness of environmental protection, more environmentally friendly electric vehicles and hybrid vehicles have become one of the current research and development priorities. Among them, large batteries as their energy sources are the biggest key factor in the development of electric vehicles and hybrid vehicles. Nickel-iron batteries were used in transportation in the 1910s. Because of their long cycle life, resistance to overcharge and overdischarge, sufficient raw materials, and no pollution, they are an excellent choice for large batteries. The structure of the nickel-iron battery mainly includes: the iron electrode as the negative...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/26H01M10/30
CPCY02E60/10
Inventor 周更生高振裕蔡昀儒
Owner NATIONAL TSING HUA UNIVERSITY
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