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Preparation method of lithium air battery transition metal sulfide air cathode material

A lithium-air battery, transition metal technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as development constraints of lithium-ion batteries, and achieve the effect of being conducive to transmission, increasing capacity, and large specific surface area

Inactive Publication Date: 2017-08-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent decades, batteries based on metallic lithium have dominated the development of high-performance batteries. Although the electrochemical capacity of metallic lithium is as high as 3860 mAh / g, the electrochemical capacity of most lithium-ion battery cathode materials is only 200 mAh / g. Left and right, the development of lithium-ion batteries is greatly restricted by its cathode materials.

Method used

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  • Preparation method of lithium air battery transition metal sulfide air cathode material
  • Preparation method of lithium air battery transition metal sulfide air cathode material
  • Preparation method of lithium air battery transition metal sulfide air cathode material

Examples

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Embodiment 1

[0028] (1) Take 120ml of isopropanol and 32ml of glycerin in a beaker and stir for 5 minutes to mix them evenly. Then weigh 350mg of Ni(NO 3 ) 2 ·6H 2 O and 700mg of Co(NO 3 ) 2 ·6H 2 O, add to the beaker, sonicate for 20min, and continue to stir until a purple-red clear solution is formed. Then the solution was transferred to a 200ml hydrothermal kettle, and the temperature was raised to 180°C for 6h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a brown powder;

[0029] (2) Take 300mg of the powder obtained in step (1) and add 60ml of H 2 O, ultrasonically agitated until homogeneously mixed. Then the solution was transferred to a 100ml hydrothermal kettle, the temperature was raised to 160°C and kept for 8h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a dark green powder, namely nickel-cobalt hydroxide;

[0030] (3) Weigh a certain...

Embodiment 2

[0033] (1) Take 120ml of propanol and 32ml of glycerin in a beaker and stir for 5 minutes to mix them evenly. Then weigh 350mg of Ni(NO 3 ) 2 ·6H 2 O and 700mg of Co(NO 3 ) 2 ·6H 2 O, add to the beaker, sonicate for 20min, and continue to stir until a purple-red clear solution is formed. Then the solution was transferred to a 200ml hydrothermal kettle, and the temperature was raised to 200°C for 5h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a brown powder;

[0034] (2) Take 200mg of the powder obtained in step (1) and add 60ml of H 2 O, ultrasonically agitated until homogeneously mixed. Then the solution was transferred to a 100ml hydrothermal kettle, the temperature was raised to 170°C and kept for 6h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a dark green powder, namely nickel-cobalt hydroxide;

[0035] (3) Weigh a certain am...

Embodiment 3

[0037] (1) Take 100ml of isopropanol and 25ml of glycerin in a beaker, stir for 5 minutes to mix the two evenly. Then weigh 300mg of Ni(NO 3 ) 2 ·6H 2 O and 600mg of Co(NO 3 ) 2 ·6H 2 O, add to the beaker, sonicate for 20min, and continue to stir until a purple-red clear solution is formed. Then the solution was transferred to a 200ml hydrothermal kettle, and the temperature was raised to 170°C for 7h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a brown powder;

[0038] (2) Take 250mg of the powder obtained in step (1) and add 70ml of H 2 O, ultrasonically agitated until homogeneously mixed. Then the solution was transferred to a 100ml hydrothermal kettle, the temperature was raised to 150°C and kept for 9h. After naturally cooling to room temperature, take out suction filtration, and dry at 80°C for 12 hours to obtain a dark green powder, namely nickel-cobalt hydroxide;

[0039](3) Weigh a certain ...

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Abstract

The invention belongs to the technical field of preparation of lithium air battery, and concretely relates to a preparation method of a lithium air battery transition metal sulfide air cathode material. The preparation method mainly comprises the following steps: a hydrothermal method is used for preparing nickel-cobalt glycerin salt; the glycerin salt is hydrolyzed in order to form nickel-cobalt hydroxide hollow spheres; and gas phase sulfuration of the nickel-cobalt hydroxide is obtained. The preparation technology has few steps and low cost, NiCo2S4 hollow spheres with a flower-like multilevel channel structure are successfully synthesized, overpotential is effectively reduced, and capacity and cycle life are improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-air batteries, and in particular relates to a preparation method of a positive electrode material of a lithium-air battery. Background technique [0002] In recent decades, batteries based on metallic lithium have dominated the development of high-performance batteries. Although the electrochemical capacity of metallic lithium is as high as 3860 mAh / g, the electrochemical capacity of most lithium-ion battery cathode materials is only 200 mAh / g. Left and right, the development of lithium-ion batteries is greatly restricted by its cathode materials. Different from lithium-ion batteries, metal-air batteries use metal as the negative electrode and oxygen in the air as the positive electrode, which has become a research hotspot in recent years. [0003] The metal-air battery is composed of a metal negative electrode, an electrolyte and an air electrode. Its air electrode can continuously absorb the el...

Claims

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Application Information

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IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/624Y02E60/10
Inventor 余爱水黄桃陈翔李良昱陈春光
Owner FUDAN UNIV