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Synthesis of coordination polymer and application of coordination polymer to cathode material for lithium-ion battery

A technology of coordination polymers and complexes, used in battery electrodes, secondary batteries, secondary battery manufacturing, etc., can solve problems such as poor solubility and low specific capacity, and achieve improved stability, good cycle performance, and good electrical Effects of chemical properties

Inactive Publication Date: 2018-02-06
NANKAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The first purpose of the present invention is to provide a method for preparing a coordination polymer applied to the negative electrode material of lithium-ion batteries in view of the above technical analysis, so as to solve the problems of poor solubility and low specific capacity currently used in batteries

Method used

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  • Synthesis of coordination polymer and application of coordination polymer to cathode material for lithium-ion battery
  • Synthesis of coordination polymer and application of coordination polymer to cathode material for lithium-ion battery
  • Synthesis of coordination polymer and application of coordination polymer to cathode material for lithium-ion battery

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Embodiment 1

[0031] Embodiment 1, complex [Ni(PBIM)(OH-BDC)] n Synthesis.

[0032] (1) Please refer to figure 1 , which is a diagram of the synthetic reaction steps of the complex in the present invention.

[0033] Weigh nickel acetate tetrahydrate (Ni(OAc) 2 4H 2 O) (0.5mmol), 2,2'-pyridylbenzimidazole (PBIM) (0.1mmol), 5-hydroxyisophthalic acid (OH-BDC) (0.2mmol), triethylamine (0.1mmol) dissolved In 2mL of methanol and 6mL of water, heated to 120 degrees Celsius in a reaction kettle for 3 days, and cooled to room temperature after the reaction to obtain crystals of the complex.

[0034] (2) Take the crystal in the reaction kettle in step 1 on a glass sheet, select a transparent and crack-free regular crystal with a size of 0.3*0.5*0.5mm under a microscope, and measure it on a Supernova X-ray single crystal diffractometer. Mo-Kα Ray Monochromated by Monochromator is the incident radiation source, with Diffraction points were collected by scanning, and their coordinates and anisotr...

Embodiment 2

[0036] Embodiment 2, complex [Ni(PBIM)(OH-BDC)] n Application as a negative electrode material in the preparation of lithium-ion batteries

[0037] (4) Take the complex crystal prepared in step (1) and dry it in a vacuum oven at 60°C for 8 hours. Then weigh the dried complex [Ni(PBIM)(OH-BDC)] with a mass ratio of 6:3:1 n , the conductive agent (ketjen black) and the binder (polyvinylidene fluoride) are ground and mixed evenly, adjusted into a slurry with a solvent (N-methylpyrrolidone), coated on a copper foil, and dried at 80 degrees Celsius for 12 hours in a vacuum to obtain an electrode piece. Select the MSK-T10 manual slicer with a mold size of 12 mm in diameter to slice the obtained electrode sheets into circular electrode sheets, and weigh them for later use.

[0038] (5) A lithium sheet is used as the counter electrode, a Celgard 2400 membrane is used as the diaphragm, and 1mol / L lithium hexafluorophosphate (LiPF 6 ) is electrolyte, and volume ratio ethylene carbon...

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Abstract

The invention discloses synthesis of a coordination polymer and application of the coordination polymer to a cathode material for a lithium-ion battery. The chemical formula of a coordination compoundis [Ni(PBIM)(OH-BDC)]n (in the formula, n is a natural number from 1 to positive infinity), wherein PBIM is 2,2'-pyridylbenzimidazole; OH-BDC is 5-hydroxyisophthalic acid. A preparation method of thecoordination compound comprises the following steps of adding a nickel acetate tetrahydrate, the 2,2'-pyridylbenzimidazole, the 5-hydroxyisophthalic acid and triethylamine into a mixed solution of water and methanol, and obtaining the target product complex [Ni(PBIM)(OH-BDC)]n through a hydrothermal reaction; the target product can be applied to the cathode material for the lithium-ion battery. The synthesis has the advantages that a synthesis method of the obtained coordination compound is simple; raw materials are easily obtained; the operation is easy; a reaction condition is mild; the yield is high; the cost is low and the product has better stability, is directly used in the cathode material of the lithium battery and shows favorable electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to the synthesis of a coordination polymer material with good stability, the lithium ion battery negative electrode and the preparation method of the lithium ion battery. Background technique [0002] With the development of the economy and society, the demand for efficient and clean energy is also imminent. As an advanced energy storage device, lithium-ion batteries are light in weight, small in size, easy to carry, high in working voltage, large in specific energy, small in self-discharge and long in cycle life. Long, high safety, no memory effect, no environmental pollution and other outstanding advantages, it has become an ideal power source for small and lightweight electronic devices such as cameras, mobile phones, notebook computers, and portable measuring instruments, and it is also the preferred power source for high-energy power batteries in future vehicles. A lithium-io...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/137H01M10/04H01M10/0525
CPCH01M4/137H01M4/602H01M10/0427H01M10/0525Y02E60/10Y02P70/50
Inventor 师唯杜佳程鹏
Owner NANKAI UNIV
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