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Copper phosphate plus plate material for lithium battery and its preparation method

A cathode material, copper phosphate technology, used in electrode manufacturing, battery electrodes, phosphates, etc., can solve problems such as potential safety hazards, and achieve the effects of easy operation, solving voltage hysteresis, and cheap raw materials

Inactive Publication Date: 2008-11-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfur dioxide, thionyl chloride and sulfuryl chloride cathode materials have high specific energy, but there are serious safety hazards, especially under high current discharge conditions.
In 1997, Idota; Yosio; Yasunami; Shoichiro; Reporting of relevant data

Method used

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  • Copper phosphate plus plate material for lithium battery and its preparation method
  • Copper phosphate plus plate material for lithium battery and its preparation method
  • Copper phosphate plus plate material for lithium battery and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1.19g CuO and 1.15g NH 4 h 2 PO 4 In an agate ball mill jar, use 10ml of acetone as a dispersant, and ball mill for 5 hours (rotation speed 500r / min). After the acetone is volatilized, it is transferred to a porcelain boat in a box-type resistance furnace, heat-treated at 700° C. for 10 h in an air atmosphere, and naturally cooled to room temperature to obtain the copper phosphate material. According to the mass ratio of copper phosphate material: acetylene black: binder = 80:10:10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120°C, and press it at 20MPa to obtain the positive electrode for lithium battery.

Embodiment 2

[0025] 5.96g CuO and 5.75g NH 4 h 2 PO 4In an agate ball mill jar, use 30ml acetone as a dispersant, and ball mill for 3 hours (rotation speed 600r / min). After the acetone is volatilized, it is transferred to a porcelain boat in a box-type resistance furnace, heat-treated at 800° C. for 10 h in an air atmosphere, and cooled naturally to room temperature to obtain the copper phosphate material. According to the mass ratio of copper phosphate material: acetylene black: binder = 80:10:10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120°C, and press it at 20MPa to obtain the positive electrode for lithium battery.

Embodiment 3

[0027] 11.93g CuO and 11.5g NH 4 h 2 PO 4 In an agate ball mill jar, use 40ml acetone as a dispersant, and ball mill for 10 hours (rotation speed 500r / min). After the acetone is volatilized, it is transferred to a porcelain boat in a box-type resistance furnace, heat-treated at 900°C for 3 hours in an air atmosphere, and cooled naturally to room temperature to obtain the copper phosphate material. According to the mass ratio of copper phosphate material: acetylene black: binder = 80:10:10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120°C, and press it at 20MPa to obtain the positive electrode for lithium battery.

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Abstract

A method for preparing copper phosphate positive electrode material used on lithium cell includes forming copper phosphate positive electrode material by Cu3 (PO4)2 / C as copper phosphate content being 100 mass%-90 mass% and carbon content being o mass% -10mass%, ball -grinding and mixing copper salt with phosphoric acid in chemical metering ratio to obtain copper phosphate material as chemical formula of Cu3(PO4)2 after heat treatment in high temperature, ball-grinding copper phosphate material with carbon material to obtain copper phosphate / carbon composite material as chemical formula of Cu3( PO4 )2 / C.

Description

technical field [0001] The present invention relates to a kind of positive pole material of lithium battery, relate in particular to a kind of copper phosphate (Cu phosphate) used for lithium battery 3 (PO 4 ) 2 ) positive electrode material and its preparation method. Background technique [0002] After decades of development, lithium batteries have been widely used in various portable electronic products. The current commercial lithium battery cathode materials mainly include: sulfur dioxide, thionyl chloride, sulfuryl chloride, manganese dioxide, ferrous disulfide and silver vanadate. Sulfur dioxide, thionyl chloride and sulfuryl chloride cathode materials have high specific energy, but there are serious safety hazards, especially under high current discharge conditions. Lithium-manganese dioxide battery and lithium-iron disulfide battery have high specific energy and good safety performance, but the high-current discharge performance is not good. Lithium-silver vana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04C01G3/00C01B25/26
CPCY02E60/12Y02E60/10
Inventor 杨勇李益孝龚正良
Owner XIAMEN UNIV
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