Bismuth metal organic framework material, preparation method and lead storage battery anode additives thereof

A technology of organic framework and bismuth metal, which is applied in the preparation, application of positive electrode additives for lead storage batteries, in the field of bismuth metal organic framework materials, can solve the problems of low utilization rate of active materials and low energy density, and improve the utilization rate of positive active materials , large pore volume, and improved utilization

Active Publication Date: 2014-02-26
JIANGSU HUAFU STORAGE NEW TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical capacity density of a lead-acid battery is 167 Wh / kg, but its actual energy density is relatively low, generally no more than 50 Wh / kg, that is, the utilization rate of the positive active material is about 30% [Moseley P. Journal of Power Sources, 1997, 64(1): 47-50]
With the positive discharge reaction (PbO2+4H++SO42-+2e- ?PbSO4+H2O), the sulfuric acid electrolyte concentration gradually decreases; in addition, the formation of PbSO4 makes Diffusion of sulfuric acid electrolyte to the inside of the plate is limited, resulting in low utilization of the entire active material [McGregor K. Journal of Power Sources, 1996, 59(1): 31-43]

Method used

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Experimental program
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preparation example Construction

[0025] 1. Preparation of bismuth metal organic framework materials

[0026] The effects of feed ratio, solvent selection and reaction temperature on the product and yield were systematically studied.

Embodiment 1

[0028] Weigh 2 mmol Bi(NO 3 ) 3 , 2 mmol 1,3,5-benzenetricarboxylic acid, 1 mmol 1,4-benzenedicarboxylic acid, and mix well, place in a 200 ml polytetrafluoroethylene-lined stainless steel reactor, add 100 ml methanol. Heat up to 150 o C for 24 h. The yellow precipitate was vacuum filtered, washed with dimethylformamide, methanol and deionized water in sequence, and finally dried in air to obtain a bismuth metal organic framework material. After inspection, the obtained bismuth metal organic framework material is a porous material. The metal organic framework material has good water solubility and acid stability, and can be dispersed in deionized water in advance.

Embodiment 2

[0030] Weigh 3 mmol Bi(NO 3 ) 3 , 1.5 mmol 1,3,5-benzenetricarboxylic acid, 1.5 mmol 1,4-benzenedicarboxylic acid, 1.5 mmol 3,5-pyridinedicarboxylic acid and mix well, place in 200 ml polytetrafluoroethylene-lined stainless steel reaction kettle , add 80 ml methanol and 20 ml dimethylformamide. Heat to 120 o C for 24 h. The yellow precipitate was vacuum filtered, washed with dimethylformamide, methanol and deionized water in sequence, and finally dried in air to obtain a bismuth metal organic framework material. After inspection, the obtained bismuth metal organic framework material is a porous material. The metal organic framework material has good water solubility and acid stability, and can be dispersed in deionized water in advance.

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Abstract

The invention discloses a bismuth metal organic framework material, a preparation method of the bismuth metal organic framework material and an application of the bismuth metal organic framework material in lead storage battery anode additives. The bismuth metal organic framework material disclosed by the invention is a porous material, so that the material has high porosity, a large pore volume, a large superficial area and good water solubility and acid stability, and the material can be dispersed in deionized water in advance. The bismuth metal organic framework material can be used as a lead storage battery anode doping material and can improve the utilization rate of active substance and enhance the charge acceptance.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a bismuth metal organic framework material, a preparation method and its application in the positive electrode additive of lead storage battery. Background technique [0002] Despite the rapid development of new batteries such as lithium-ion batteries, nickel-metal hydride batteries and flow batteries, lead-acid batteries are still very reliable and safe secondary chemical power sources, and they are also the most successful and widely used power and energy storage in the market. system. Compared with other battery technologies, lead-acid batteries are safe to use, stable in operation, low in cost and long in cycle life. The theoretical capacity density of lead-acid batteries reaches 167 Wh / kg, but the energy density actually used is relatively low, generally no more than 50 Wh / kg, that is, the utilization rate of positive active materials is about 30%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/94H01M4/62
CPCY02E60/10
Inventor 黄毅魏迪肖巍吴战宇顾立贞周寿斌居春山
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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