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Sodium ion pre-embedded MoO3 nanobelt as well as preparation method and application of sodium ion pre-embedded MoO3 nanobelt

A nanobelt and sodium ion technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of low electrical conductivity, structural damage, limited development and application, etc., and achieve the effect of improving electrical conductivity, improving electrochemical performance, and avoiding large attenuation

Active Publication Date: 2015-05-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But MoO 3 The conductivity is low, and the structure is easily damaged during cycling, so the capacity fades quickly during cycling, which limits its development and application

Method used

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  • Sodium ion pre-embedded MoO3 nanobelt as well as preparation method and application of sodium ion pre-embedded MoO3 nanobelt
  • Sodium ion pre-embedded MoO3 nanobelt as well as preparation method and application of sodium ion pre-embedded MoO3 nanobelt
  • Sodium ion pre-embedded MoO3 nanobelt as well as preparation method and application of sodium ion pre-embedded MoO3 nanobelt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Sodium ion pre-intercalated MoO 3 The preparation method of nanobelt comprises the following steps:

[0030] 1) in 40ml 30% H 2 o 2 Slowly add 4g of molybdenum powder, then add an appropriate amount of deionized water, stir to obtain an orange acid solution, and then place it in a water bath at 70°C for 4 hours;

[0031] 2) Transfer the solution obtained in step 1) into a 100ml reaction kettle, put it in an oven at 180°C for 6 hours, then take it out and cool it to room temperature;

[0032] 3) The product obtained in step 2) was centrifuged, washed repeatedly with deionized water and ethanol, and then dried in an oven at 70°C to obtain MoO 3 nanobelt;

[0033] 4) Add 0.36g of the product obtained in step 3), 0.3g of PEG4000 and 1mmol NaCl to an appropriate amount of deionized water, and stir for 2h;

[0034] 5) Transfer the solution obtained in step 4) into a 100ml reactor, put it in an oven at 180°C for 2 days, then take it out and cool it to room temperature;

...

Embodiment 2

[0045] Sodium ion pre-intercalated MoO 3 The preparation method of nanobelt comprises the following steps:

[0046] 1) in 40ml 30% H 2 o 2 Slowly add 4g of molybdenum powder, then add an appropriate amount of deionized water, stir to obtain an orange acid solution, and then place it in a water bath at 70°C for 4 hours;

[0047] 2) Transfer the solution obtained in step 1) into a 100ml reaction kettle, put it in a 160°C oven for 6 hours, then take it out and cool it to room temperature;

[0048] 3) The product obtained in step 2) was centrifuged, washed repeatedly with deionized water and ethanol, and then dried in an oven at 70°C to obtain MoO 3 nanobelt;

[0049] 4) Add 0.36g of the product obtained in step 3), 0.3g of PEG4000 and 1mmol NaCl to an appropriate amount of deionized water, and stir for 2h;

[0050] 5) Transfer the solution obtained in step 4) into a 100ml reaction kettle, put it in an oven at 180°C for 3 days, and then take it out and cool it to room tempera...

Embodiment 3

[0054] Sodium ion pre-intercalated MoO 3 The preparation method of nanobelt comprises the following steps:

[0055] 1) in 40ml 30% H 2 o 2 Slowly add 4g of molybdenum powder, then add an appropriate amount of deionized water, stir to obtain an orange acid solution, and then place it in a water bath at 70°C for 4 hours;

[0056] 2) Transfer the solution obtained in step 1) into a 100ml reaction kettle, put it in an oven at 180°C for 6 hours, then take it out and cool it to room temperature;

[0057] 3) The product obtained in step 2) was centrifuged, washed repeatedly with deionized water and ethanol, and then dried in an oven at 70°C to obtain MoO 3 nanobelt;

[0058] 4) Add 0.36g of the product obtained in step 3), 0.3g of PEG4000 and 1mmol NaCl to an appropriate amount of deionized water, and stir for 2h;

[0059] 5) Transfer the solution obtained in step 4) into a 100ml reactor, put it in an oven at 200°C for 2 days, then take it out and cool it to room temperature;

...

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Abstract

The invention relates to a sodium ion pre-embedded MoO3 nanobelt as well as a preparation method and application of the sodium ion pre-embedded MoO3 nanobelt. The sodium ion pre-embedded MoO3 nanobelt can be used as a positive electrode active material of a lithium ion battery. The preparation method comprises the following steps: (1) adding MoO3 nanobelt, PEG4000 and NaCl into deionized water, and stirring; (2) transferring the solution into a reaction kettle, carrying out hydrothermal reaction, taking out the solution, and cooling to the room temperature; and (3) after carrying out centrifugal separation on the obtained product, repeatedly washing the product with deionized water and ethanol, and finally drying the product in a drying box, so as to obtain the sodium ion pre-embedded MoO3 nanobelt. The preparation method has the beneficial effects that sodium ions are pre-embedded among layers, so that the substantial attenuation of the capacity in a primary cycle period is avoided, the electrochemical property of MoO3 is improved, the conductivity of the material is improved, furthermore, the cycling stability of the electrode material is effectively improved, and the electrode material can be used as a potential application material of the lithium ion battery, can meet the requirements of green chemistry and is beneficial to market promotion.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to sodium ion pre-intercalated MoO 3 The nanobelt material structure and its preparation method, the nanobelt can be used as the active material of lithium ion battery cathode. Background technique [0002] As a new type of high-energy electrochemical power source, lithium-ion batteries have the advantages of safety, reliability, low environmental pollution, light weight, and high specific capacity. They have become the preferred power source for high-value-added electronic products such as notebook computers, digital cameras, and mobile phones. The development of lithium-ion batteries has far-reaching significance for effectively alleviating environmental pollution problems, ensuring national energy security, and meeting people's growing living needs. [0003] MoO 3 , has a typical layered structure, which is suitable for the intercalation and extractio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48B82Y40/00B82Y30/00
CPCY02E60/10
Inventor 麦立强王蕾董轶凡徐小明
Owner WUHAN UNIV OF TECH
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