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Layered metal coordination polymer and synthesis method thereof

A technology of coordination polymers and layered metals, which is applied to copper organic compounds, cadmium organic compounds, iron organic compounds, etc., can solve problems such as low capacity, and achieve the effects of simple preparation method, low cost, and easy availability of raw materials.

Inactive Publication Date: 2012-09-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tin-based composite oxides have good cycle characteristics, but the first irreversible capacity loss has yet to be resolved

Method used

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  • Layered metal coordination polymer and synthesis method thereof
  • Layered metal coordination polymer and synthesis method thereof
  • Layered metal coordination polymer and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Dissolve 0.238 g (1.0 mmol) of tetrafluoroterephthalic acid in 10 mL of water to obtain a colorless solution, then dissolve 0.245 g (1.0 mmol) of manganese acetate tetrahydrate in 10 mL of water to obtain a colorless solution, then Add 4,4'-bipyridine (0.78g, 0.5mmol) to dissolve (molar ratio of manganese ion:tetrafluoroterephthalic acid:4,4'-bipyridine=2:2:1); then add this solution into the above colorless solution. After the resulting colorless mixture was reacted at room temperature for several days, the solid was collected, which was [MnL'(4,4'-bpy)(L'' ) 2 ]( L'=tetrafluoroterephthalate; L'' is H 2 O) (the structural diagram of the sample is shown in figure 1 ; Powder XRD diffraction spectrum is shown in figure 2 ; Infrared spectrum see image 3 ; cyclic voltammetry curves see Figure 4 ; Charge and discharge curves see Figure 5 ; The discharge capacity curve is shown in Image 6 , indicating that the sample has good cycle stability and high specific capa...

Embodiment 2

[0032] The experimental method is the same as in Example 1, except that the molar ratio of manganese ion: tetrafluoroterephthalic acid: 4,4'-bipyridine is changed to 3:2:1 to obtain the compound [MnL'(4,4'-bpy) (L'' ) 2 ]( L'=tetrafluoroterephthalate; L'' is H 2 O).

Embodiment 3

[0034] The experimental method is the same as in Example 1, except that the reaction temperature is changed to -10°C to obtain the compound [MnL'(4,4'-bpy)(L'' ) 2 ]( L'=tetrafluoroterephthalate; L'' is H 2 O).

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Abstract

The invention discloses a layered metal coordination polymer and a synthesis method thereof, and belongs to the field of lithium ion battery electrode material preparation. The layered metal coordination polymer has a general formula of [ML'(4,4'-bpy)(L' ')2]. The synthesis method comprises that a metal ion salt and one or more organic ligands undergo a reaction in the presence of water, an organic solvent or a mixed system of water and the organic solvent to produce the layered metal coordination polymer. The layered metal coordination polymer can be used as a negative electrode material of a lithium ion battery, and has good cycling stability, a high specific capacity and wide application prospects in the field of lithium ion battery electrode materials. The synthesis method is simple, adopts easily available raw materials, has good technical repeatability, a high yield, safety, a low cost and a wide application range, and is suitable industrial production.

Description

technical field [0001] The invention belongs to the field of lithium ion battery electrode materials and preparation thereof, in particular to a class of layered metal coordination polymer materials and a preparation method thereof. Background technique [0002] Since the advent of lithium-ion batteries in the 1990s, they have been widely used in small electrical appliances such as mobile phones, notebook computers, and digital cameras, and have entered the field of electric vehicle power. Facing the global energy shortage and increasingly serious environmental pollution, the role of lithium-ion batteries as an energy storage system in meeting these challenges has also attracted increasing attention. In recent years, the research and application development involving positive and negative electrode materials and functional electrolytes of lithium-ion batteries at home and abroad are quite active. The purpose is to develop low-cost, high-safety, high-capacity, high-power, lon...

Claims

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Application Information

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IPC IPC(8): C07F13/00C07F1/08C07F15/04C07F3/08C07F15/02H01M4/60H01M4/1399
CPCY02E60/10
Inventor 刘琦李占峰纪云洲贾晓燕洪健程美令
Owner CHANGZHOU UNIV
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