Lithium-air battery amorphous carbon anode, preparation method thereof and lithium-air battery
A lithium-air battery, non-carbon technology, applied in the field of electrochemical energy, can solve the problem of reducing the charge and discharge overpotential of lithium-air batteries, and achieve the effect of reducing side reactions
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0037] The embodiment of the present invention provides a method for preparing a non-carbon positive electrode of a lithium-air battery, comprising the following steps:
[0038] a, utilizing hydrothermal reaction to form cobalt-manganese hydroxide on foamed nickel;
[0039] B, carry out annealing in the air, convert the cobalt-manganese hydroxide into MnCo 2 o 4 , to obtain Ni loaded MnCo 2 o 4 (i.e. non-carbon cathode MnCo 2 o 4 @Ni);
[0040] c, carry out hydrothermal reaction, make described Ni support MnCo 2 o 4 Composite nickel hydroxide;
[0041] d. Anneal in air to make the Ni load MnCo 2 o 4 The nickel hydroxide in the composite nickel hydroxide is converted into NiO, obtains the non-carbon positive electrode of the lithium-air battery (being NiO / MnCo 2 o 4 @Ni).
[0042] The preparation method of the non-carbon positive electrode of the lithium-air battery provided by the embodiment of the present invention uses a high temperature and high pressure hydrot...
Embodiment 1
[0064] The pretreatment process of CarbonPapers (carbon paper) is:
[0065] Cut the carbon paper without leveling layer into a square piece of 5cm×5cm.
[0066] The preparation process of carbon-based cathode CNT@CarbonPapers is:
[0067] First, weigh 50 mg of CNT and 5.56 mg of PVDF according to the mass ratio of CNT:PVDF=9:1, put them in an agate mortar and grind them for 20 minutes while mixing them, then pour them into a 100 mL beaker, add 50 mL of absolute ethanol, magnetically stirred for 30 minutes, so that PVDF can be fully dissolved in absolute ethanol. Then the mixture was placed in an ultrasonic cell disruptor for 30 min so that the CNTs could be fully dispersed in absolute ethanol. Use an ultrasonic sprayer to evenly spray the mixture of CNT, PVDF and absolute ethanol on the surface of the pretreated Carbon Papers, and then place the Carbon Papers in an oven to dry for 12 hours to form the positive electrode sheet CNT@Carbon Papers. Finally, according to the spe...
Embodiment 2
[0070] Cutting and cleaning of nickel foam:
[0071] The untreated nickel foam was cut into discs with a diameter of 4 cm, rinsed repeatedly with deionized water three times, and then soaked in a hydrochloric acid solution with a mass fraction of 15% for 30 minutes to remove the oxide layer covered on the surface of the nickel foam. The nickel foam after the oxide layer was removed was repeatedly rinsed with deionized water and then dried in a vacuum oven for 12 hours.
[0072] The cleaned nickel foam can provide a cleaner adhesion surface for the hydroxide deposited in the hydrothermal process.
[0073] Non-carbon-based cathode MnCo 2 o 4 / Ni preparation process:
[0074] The first step is high temperature and high pressure hydrothermal reaction, so that cobalt manganese hydroxide is tightly bound to the nickel foam:
[0075] Weigh 0.0472g of MnCl respectively 2 (0.375mmol), 0.2182g of Co(NO 3 ) 2 ·6H 2 O (0.75mmol), 0.6308g of HMTA (4.5mmol) and 0.0694g of NH 4 F (1...
PUM
| Property | Measurement | Unit |
|---|---|---|
| quality score | aaaaa | aaaaa |
| quality score | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More