Lithium ion battery negative electrode MOF material and application thereof

A lithium-ion battery, MOF technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve the problem of low capacity, achieve high lithium storage capacity, increase diffusion rate, and good solvent stability

Active Publication Date: 2018-02-23
南京铁鸣能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most MOF materials have the disadvantage of low capacity when used as the negative electrode of lithium batteries.

Method used

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  • Lithium ion battery negative electrode MOF material and application thereof
  • Lithium ion battery negative electrode MOF material and application thereof
  • Lithium ion battery negative electrode MOF material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific steps for the preparation of PCN-600(Fe) lithium battery negative electrode material are:

[0024] (1) Synthesis of PCN-600(Fe):

[0025] a: [Fe 3 O(OOCCH 3 ) 6 OH]2H 2 For the synthesis of O clusters, 8 g of ferric nitrate nonahydrate and 11 g of sodium acetate trihydrate were dissolved in 9 ml of deionized water, stirred overnight at room temperature, the obtained precipitate was filtered and washed once with cold deionized water, and dried at 100 ° C. The product was obtained by recrystallization at 150°C in N,N-dimethylformamide;

[0026] b: Synthesis of PCN-600(Fe), 80 mg of [Fe 3 O(OOCCH 3 ) 6 OH]2H 2 O clusters, 80 mg of tetrakis(4-carboxyphenyl)porphyrin (TCPP) and 2.4 mL of trifluoroacetic acid were sonicated in 16 mL of N,N-dimethylformamide, and the resulting homogeneous solution was transferred to a stainless steel reaction vessel , 150 ° C solvent heat treatment for 12 hours, cooled to room temperature to obtain needle-shaped single cr...

Embodiment 2

[0031] (1) Synthesis of Ni-TCPP:

[0032] 80 mg of nickel nitrate hexahydrate, 80 mg of tetrakis(4-carboxyphenyl)porphyrin (TCPP) and 2.4 mL of trifluoroacetic acid were ultrasonically dissolved in 16 mL of N,N-dimethylformamide, and the resulting homogeneous solution was Transfer to a stainless steel reactor, heat-treat with a solvent at 150°C for 12 hours, and cool to room temperature to obtain a needle-shaped single crystal;

[0033] (2) The assembly of the simulated button lithium battery is the same as the preferred example, Ni-TCPP is used as the negative electrode of the lithium battery, the cycle performance is equivalent to that of PCN-600(Fe), and the reversible capacity is ~800mA h g -1 .

Embodiment 3

[0035] Synthesis of Co-TCPP and its performance as a lithium battery negative electrode: the nickel nitrate hexahydrate in Example 2 was replaced by cobalt nitrate hexahydrate, the others were the same as in Example 2, and the performance of the assembled lithium battery was equivalent to that of Example 2.

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Abstract

The invention discloses a lithium ion battery negative electrode MOF material. The MOF material disclosed by the invention is prepared by reacting porphyrin or porphyrin derivative of the porphyrin with transition metal or a transition metal cluster through a solvent thermal or wet chemistry method. When the MOF material is utilized as a lithium ion battery negative electrode material, the MOF material has a series of advantages of high specific capacity, long cycle life, outstanding rate capability and the like. Theoretical calculation proves that an active site of the action between the MOFmaterial disclosed by the invention and metal lithium has excellent performance, and the MOF material can be applied to developing high energy density lithium ion batteries.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and specifically relates to a novel lithium battery negative electrode material and its application, that is, MOF materials obtained by coordination synthesis based on porphyrin or its derivative ligands and transition metals or metal oxides are used as lithium ion batteries the negative pole. Background technique [0002] Lithium-ion batteries with high capacity and long cycle life have been the pursuit of researchers in the field of energy storage. At present, the mainstream anode materials for lithium batteries with high capacity are based on Si, Ge, Sn and other alloy anodes. The main advantage of Si anodes is that the theoretical capacity has been greatly improved compared with commercial graphite anodes (~4000mA h g -1 vs.~370mA hg -1 ). However, the volume change of Si negative electrode lithium battery is more than 300% in the process of inserting and removing lithium, and the resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13H01M4/139
CPCH01M4/13H01M4/139H01M4/62H01M4/626Y02E60/10
Inventor 孙林
Owner 南京铁鸣能源科技有限公司
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