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Double-function oxygen electrode catalyst of lithium air battery

A lithium-air battery and catalyst technology, applied in battery electrodes, physical/chemical process catalysts, circuits, etc., can solve the problems that cannot meet the requirements of rechargeable lithium-air batteries, single electrocatalytic performance, etc., and achieve good dual-functional electrocatalytic performance , easy large-scale production, low price effect

Active Publication Date: 2015-03-25
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these perovskite composite oxides have only a single electrocatalytic performance, which is far from meeting the requirements of rechargeable lithium-air batteries.

Method used

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  • Double-function oxygen electrode catalyst of lithium air battery
  • Double-function oxygen electrode catalyst of lithium air battery
  • Double-function oxygen electrode catalyst of lithium air battery

Examples

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Effect test

Embodiment 1

[0030] In this example, the bifunctional oxygen electrode catalyst for the lithium-air battery is a perovskite-type composite oxide whose surface is coated with nitrogen. The catalyst is a powder with a particle size of 50-100nm. The perovskite composite oxide is LaNiO 3 .

[0031] In this example, the bifunctional oxygen electrode catalyst for the lithium-air battery is prepared according to the following steps:

[0032] (1) Synthesis of LaNiO by sol-gel method 3 ;

[0033] a. Using deionized water as solvent, citric acid and ethylene glycol as complexing agent and thickener respectively, prepare a mixed solution of citric acid, ethylene glycol and soluble metal salt:

[0034] a1. Add 40ml deionized water and 2.9522gNi(NO3) to a 100ml beaker 2 ·6H 2 O, get Ni(NO 3 ) 2 solution;

[0035] a2. Add 40ml deionized water and 3.2492gLa(NO3) to a 100ml beaker 3 ·6H 2 O, get La(NO 3 ) 3 solution;

[0036] a3. Add 50ml of deionized water and 6.3359g of citric acid into a ...

Embodiment 2

[0053] In this example, the bifunctional oxygen electrode catalyst for the lithium-air battery is a perovskite-type composite oxide whose surface is coated with nitrogen. The catalyst is a powder with a particle size of 50-100nm. The perovskite composite oxide is LaNiO 3 .

[0054] In this example, the bifunctional oxygen electrode catalyst for the lithium-air battery is prepared according to the following steps:

[0055] 1, prepare LaNiO by the method identical with embodiment 1 3 .

[0056] 2. Follow the steps below to treat LaNiO 3 The surface is nitrogen coated:

[0057] a. Mix ethanol and deionized water at a ratio of 1:1 to obtain a mixed solution, and LaNiO 3 Add 0.05g into 20mL of the mixture, ultrasonically disperse for 3 hours, add 20ml of concentrated ammonia water dropwise, and continue the ultrasonic reaction for 4 hours to obtain a well-mixed suspension;

[0058] b. Vacuum filter the suspension, take the filter cake and dry it in a blast oven at 40°C for 1...

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Abstract

The invention discloses a double-function oxygen electrode catalyst of a lithium air battery. The double-function oxygen electrode catalyst is characterized by being perovskite composite oxide which is coated by nitrogen. The double-function oxygen electrode catalyst of the lithium air battery has a good double-function electric catalytic performance, the discharging capacity of the lithium air battery is high, a discharging platform is high, the preparation process is simple, the repeatability is good, the cost is low, and the double-function oxygen electrode catalyst has a good application prospect in the future.

Description

technical field [0001] The invention relates to a lithium-air battery catalyst, in particular to a lithium-air battery catalyst with dual-functional catalytic activity. Background technique [0002] The increasingly serious global environmental and energy problems force scientists to find sustainable new energy technologies to meet the development of new energy electric vehicles. Lithium-ion batteries have long been considered the most promising power source for electric vehicles due to their good cycle performance and high energy utilization efficiency. However, lithium-ion batteries with low energy density cannot meet the high energy density requirements of electric vehicles, which limits their long-term application in the field of electric vehicles. To realize the popularization of electric vehicles, scientists urgently need to develop new battery systems with high energy density, low price and environmental friendliness. [0003] Rechargeable lithium-air battery is a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B01J27/24
CPCY02E60/50
Inventor 张大伟杜真真杨鹏姚运金姚红宝张秋张健
Owner HEFEI UNIV OF TECH
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