Preparation method of zinc-based complex lithium ion battery negative electrode material

A technology of lithium ion battery and negative electrode material, applied in electrode manufacturing, battery electrode, secondary battery manufacturing, etc., to achieve the effects of novel structure, low price, and low requirements for synthesis equipment

Active Publication Date: 2018-10-02
QUJING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of zinc-based complex lithium-ion battery negative electrode materials to solve the problem of obtaining la

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  • Preparation method of zinc-based complex lithium ion battery negative electrode material
  • Preparation method of zinc-based complex lithium ion battery negative electrode material
  • Preparation method of zinc-based complex lithium ion battery negative electrode material

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Embodiment 1

[0041] Embodiment 1: Zn(NO 3 ) 2 ·6H 2 O (1.0 mmol, 297 mg), H 2 bcbpy·2Cl (0.5 mmol, 258 mg), HOOCC 6 h 4 COOH (1.0 mmol, 166 mg), NH 4 PF 6 (1.0 mmol, 163 mg) were mixed, added to a mixed solution of distilled water (8 mL) and DMF (8 mL), and stirred for 30 min at room temperature under an air atmosphere. Then the mixed liquid was transferred to a 25ml Teflon autoclave and heated to 120 °C for 24 h. After the reaction, the temperature was lowered to room temperature at a rate of 10 ˚C / h to obtain white needle-like crystals, which were filtered, washed, and dried to obtain the complex Zn-bPTA with a calculated yield of about 83%. The obtained Zn-bPTA electrode material was ground and passed through a 300-mesh sieve. According to the metal complex Zn-bPTA (0.6g), PVDF (0.1g), KS6 (0.2g), Super-P (0.1g) according to the mass ratio of 60:10:20:10 to configure a mixture, add the solvent NMP (2.5 g), after stirring for 2 h, a black viscous electrode slurry was prepared. ...

Embodiment 2

[0043] Embodiment 2: Zn(NO 3 ) 2 ·6H 2 O (2.0 mmol, 594 mg), H 2 bcbpy·2Cl (1.0 mmol, 516 mg), HOOCC 6 h 4 COOH (2.0 mmol, 332 mg), NH 4 PF 6 (2.0 mmol, 326 mg) were mixed, added to a mixed solution of distilled water (16 mL) and DMF (16 mL), and stirred at room temperature under an air atmosphere for 60 min. Then the mixed liquid was transferred to a 50 ml Teflon autoclave and heated to 120 °C for 24 h. After the reaction was completed, the temperature was lowered to room temperature at a rate of 10°C / h to obtain white needle-like crystals, which were filtered, washed, and dried to obtain the complex Zn-bPTA, with a calculated yield of about 82%. The obtained Zn-bPTA electrode material was ground and passed through a 300-mesh sieve. According to the metal complex Zn-bPTA (0.5g), PVDF (0.1g), KS6 (0.2g), Super-P (0.2g) according to the mass ratio of 50:10:20:20 to configure a mixture, add the solvent NMP (2.5 g), after stirring for 2 h, a black viscous electrode slurr...

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Abstract

The invention provides a preparation method of a zinc-based complex lithium ion battery negative electrode material. The method includes: adding zinc nitrate, [1, 1'-bis(3-carboxyl-benzylidene)-4, 4'-bipyridine chloride], terephthalic acid, ammonium hexafluorophosphate and distilled water into (N, N-dimethylamide), and stirring the substances uniformly at room temperature; then transferring the mixed liquid into a Teflon high pressure reaction kettle, performing heating to 120DEG C, and maintaining a constant temperature for 24h; and conducting cooling to room temperature at the end of reaction to obtain white acicular crystals; and carrying out filtration, washing and drying so as to obtain the complex Zn-bPTA. The initial discharge specific capacity of the material can reach 816.3mAh/g,the second circulating discharge specific capacity is 407.5mAh/g, and after 100 cycles, the discharge capacity is 386.2mAh/g. The equipment requirement is low, and the operation is simple. The synthesized zinc-based complex has the characteristics of stable structure, low price and environmental friendliness, and is a lithium ion battery negative electrode material with novel structure.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a zinc-based complex lithium ion battery. This material is referred to as Zn-bPTA, which has good electrochemical performance and good cycle stability. Background technique [0002] Today, lithium-ion batteries have been widely used in portable electronic devices, new energy vehicles, energy storage base stations and other fields, and the application of lithium-ion batteries will become more common in the future. However, since the development of lithium-ion batteries, their energy density still cannot meet people's needs, which is mainly limited by the performance of lithium-ion battery electrode materials. The electrode material system of traditional lithium-ion batteries is dominated by inorganic materials, such as layered structure LiCoO 2 and its derivatives, polyanionic LiFePO 4 and its derivatives, spinel LiMn 2 o 4 and its derivatives. The negative electrode...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/0525H01M10/0566H01M4/04H01M10/04
CPCH01M4/0404H01M4/60H01M10/0427H01M10/0525H01M10/0566Y02E60/10Y02P70/50
Inventor 刘建军夏书标李付绍成飞翔段玉莲
Owner QUJING NORMAL UNIV
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