Novel magnesium air battery catalysis layer material as well as preparation technology and application

A technology of air battery and preparation process, which is applied in the field of electrochemistry, can solve the problems of high price, limitation of large-scale industrial production of fuel cells, and scarcity of precious metal storage, and achieve low price, improved oxygen catalytic performance of materials, and convenient acquisition Effect

Active Publication Date: 2019-02-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The key technology for metal-air batteries is to prepare a catalytic layer material with excellent performance and good stability. At present, the catalytic layer material with the best performance is still Pt / C or Pt alloy noble metal catalyst material, but due to the scarcity of precious metal storage, The high price greatly limits the large-scale industrial production of fuel cells. Therefore, it is of great significance to find a new type of efficient oxygen reduction electrocatalyst for the development of fuel cells.

Method used

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  • Novel magnesium air battery catalysis layer material as well as preparation technology and application
  • Novel magnesium air battery catalysis layer material as well as preparation technology and application
  • Novel magnesium air battery catalysis layer material as well as preparation technology and application

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Effect test

Embodiment 1

[0028] A composite material uniformly loaded on graphene with trimanganese tetraoxide and nano-silver particles, including reduced graphene, trimanganese tetraoxide, and nano-silver particles, and trimanganese tetraoxide and nano-silver particles are uniformly attached to the surface of graphene, nano The silver particle accounts for 22% of the mass fraction of the composite material, and the preparation method comprises the following steps:

[0029] Step 1, preparing an aqueous solution of graphene oxide: disperse 40 mg of flake graphene oxide into 80 mL of absolute ethanol, and ultrasonically vibrate for 1 hour to obtain a graphene oxide dispersion.

[0030] Step 2, preparation of graphene oxide-loaded manganese tetraoxide and metal nano-silver particle composite material: add 240 mg of manganese acetate to the graphene oxide aqueous solution obtained in step 1, ultrasonically vibrate for 30 minutes by an ultrasonic machine, and carry out at room temperature Stir for 30 minu...

Embodiment 2

[0033] A composite material uniformly loaded on graphene with trimanganese tetraoxide and nano-silver particles, including reduced graphene, trimanganese tetraoxide, and nano-silver particles, and trimanganese tetraoxide and nano-silver particles are uniformly attached to the surface of graphene, The mass fraction of the nano-silver particles accounting for the composite material is 44%, and the preparation method comprises the following steps:

[0034] Step 1, prepare the graphene oxide aqueous solution: disperse 40 mg of flake graphene oxide into 80 mL of absolute ethanol, and after ultrasonic vibration for 1 hour, obtain the graphene oxide dispersion.

[0035] Step 2, preparing graphene oxide-loaded manganese tetraoxide and metal nano-silver particle composite material: 160 mg of manganese acetate is added to the graphene oxide aqueous solution obtained in step 1, ultrasonically oscillated for 30 minutes by an ultrasonic machine, and carried out at room temperature Stir for...

Embodiment 3

[0038] A composite material uniformly loaded on graphene with trimanganese tetraoxide and nano-silver particles, including reduced graphene, trimanganese tetraoxide, and nano-silver particles, and trimanganese tetraoxide and nano-silver particles are evenly attached to the surface of graphene, The mass fraction of the nano-silver particles accounting for the composite material is 66%, and the preparation method comprises the following steps:

[0039] Step 1, preparing an aqueous solution of graphene oxide: disperse 40 mg of flake graphene oxide into 80 mL of absolute ethanol, and ultrasonically vibrate for 1 hour to obtain a graphene oxide dispersion.

[0040] Step 2, preparation of graphene oxide-loaded manganese tetraoxide and metal nano-silver particle composite material: add 80 mg of manganese acetate to the graphene oxide aqueous solution obtained in step 1, ultrasonically vibrate for 30 minutes by an ultrasonic machine, and carry out at room temperature Stir for 30 minut...

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Abstract

The invention belongs to the technical field of electrochemistry and provides a novel magnesium air battery catalysis layer material as well as a preparation technology and application. The novel magnesium air battery catalysis layer material includes graphene, trimanganese tetroxide and metal nano silver particles, wherein the graphene is used as a carrier and is used for uniformly attaching thetrimanganese tetroxide and the metal nano silver particles on the surface; and the metal nano silver particles account for 22 to 66 percent of a composite material by mass. According to the novel magnesium air battery catalysis layer material, a reduced graphene oxide loaded trimanganese tetroxide and technical nano silver particle composite material is obtained through a one-step hydrothermal method and a chemical reduction method; the obtained composite material has stable chemical performance and good catalysis performance; and the composite material has high electric conductivity and a prepared magnesium air battery has stable electrical performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular to a Mn 3 o 4 -Ag / rGO new catalyst layer material, preparation process and application. Background technique [0002] In recent years, energy consumption has gradually increased, and the contradiction between energy demand and supply has become increasingly contradictory. The problem of energy shortage has attracted widespread attention. In addition, the environmental pollution caused by fossil energy has also begun to affect people's normal life. Therefore, people pay attention to clean energy. also gradually increased. A metal-air battery is a device that uses oxygen in the air as an active substance, undergoes an oxygen reduction reaction under the action of a catalyst, and transfers electrons in the electrolyte to convert chemical energy into electrical energy. The positive electrode mainly uses oxygen in the air as the main reactant, and the negative electrode uses ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/06B82Y30/00
CPCB82Y30/00H01M4/8657H01M4/88H01M4/9016H01M4/9041H01M4/9083H01M12/06
Inventor李晓干刘春晖林仕伟李振峰李欣宇顾丁王雪燕
OwnerDALIAN UNIV OF TECH