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Lithium-air battery positive electrode material and preparation method thereof

A lithium-air battery and positive electrode material technology, applied in the field of electrochemistry, can solve the problems of high cost, difficulty in marketization, and complicated preparation methods of positive electrode materials, and achieve the effects of low cost, high specific capacity, and good cycle performance

Inactive Publication Date: 2017-10-24
韦升鸿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation methods of cathode materials are complex and costly, making it difficult to market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First prepare the carbon nanorod material, including the following steps:

[0018] (1) Treatment of sisal, including washing with water, drying, crushing and passing through a 100-mesh sieve;

[0019] (2) Dissolve 100 grams of treated sisal in a mixed solution of ethanol and water, stir for 1 hour, then transfer to an oven for hydrothermal reaction at 180°C for 10 hours;

[0020] (3) After cleaning and drying the product obtained in step (2), calcining in a tube furnace at 600° C. for 4 hours in an inert atmosphere, and obtaining carbon nanorod materials after cooling down.

[0021] Applying the above-mentioned carbon nanorod material to prepare an air cathode sheet includes the following steps:

[0022] (1) Dissolve iron oxide material, carbon nanorod material and polyvinylidene fluoride (PVDF) in nitrogen methyl pyrrolidone (NMP) at a mass ratio of 1:3:1, and mix the materials

[0023] After homogenization, a liquid mixture is obtained;

[0024] (2) Apply the above...

Embodiment 2

[0027] First prepare the carbon nanorod material, including the following steps:

[0028] (1) Treatment of sisal, including washing with water, drying, crushing and passing through a 100-mesh sieve;

[0029] (2) Dissolve 150 grams of treated sisal in a mixed solution of ethanol and water, stir for 1 hour, then transfer to an oven for hydrothermal reaction at 160°C for 14 hours;

[0030] (3) After cleaning and drying the product obtained in step (2), calcining in a tube furnace at 900° C. for 3 hours in an inert atmosphere, and then obtaining carbon nanorod materials after cooling down.

[0031] Applying the above-mentioned carbon nanorod material to prepare an air cathode sheet includes the following steps:

[0032] (1) Dissolve iron oxide material, carbon nanorod material and polyvinylidene fluoride (PVDF) in nitrogen methyl pyrrolidone (NMP) at a mass ratio of 1:3:1, and mix the materials

[0033] After homogenization, a liquid mixture is obtained;

[0034] (2) Apply the ...

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PUM

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Abstract

The invention discloses a lithium-air battery positive electrode material and a preparation method thereof. The positive electrode material comprises constituents of a catalyst, a carbon material and a binding agent, wherein the mass ratio of the catalyst, the carbon material and the binding agent is 1:3:1, the catalyst is a metal oxide, the carbon material is a carbon nanorod material formed by calcination of sisal hemp, and the binding agent is a mixture of one or two or more of polytetrafluoroethylene, polyvinylidene fluoride, sodium carboxymethylcellulose and polyethylene glycol according to an arbitrary proportion. The preparation process is simple and is low in cost, and the prepared positive electrode material is high in specific capacity and has favorable cycle property.

Description

technical field technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a lithium-air battery cathode material and a preparation method thereof. Background technique [0002] Lithium-air battery is a new energy battery system that has just been developed in recent years. It uses metal lithium as the negative electrode and oxygen in the air as the positive electrode. Compared with lithium-ion batteries, it has a higher energy density. When discharging, the lithium sheet of the negative electrode releases an electron to become Li + Li + and reaches the positive electrode through the electrolyte, and reacts with oxygen and electrons flowing in from the external circuit to form lithium oxide or lithium peroxide; during charging, the discharge product of the positive electrode decomposes to produce oxygen and Li + releases electrons, Li + reaches the negative electrode through the electrolyte, obtains electrons, and forms lithiu...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01M4/88H01M12/08
CPCH01M4/8668H01M4/8828H01M4/9016H01M12/08Y02E60/10
Inventor 韦升鸿
Owner 韦升鸿
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