Lithium bismuthate/nickel hydroxide secondary alkaline battery and preparation method thereof

A technology of nickel hydroxide and alkaline batteries, which is applied in the field of electrochemical energy storage, can solve problems that have not been seen, and achieve the effects of large capacity, environmental friendliness, and broad application prospects

Active Publication Date: 2017-03-22
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there have been many reports on the application of lithium bismuthate as a photocatalyst and pearlescent pigment, but so far, there has been no use of nickel hydroxide as the positive electrode active material, lithium bismuthate a

Method used

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  • Lithium bismuthate/nickel hydroxide secondary alkaline battery and preparation method thereof
  • Lithium bismuthate/nickel hydroxide secondary alkaline battery and preparation method thereof
  • Lithium bismuthate/nickel hydroxide secondary alkaline battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) 40mmol Li 2 SO 4 ·H 2 O, 0.01gPVP surfactant and 40ml deionized water are added in the 100mL there-necked flask, then 8mmol NaBiO 3 2H 2 O was added to the above solution, and after stirring at room temperature for 30 min, the mixed solution was refluxed at 100° C. for 24 h. After the reaction was completed, the product was washed with distilled water and ethanol several times until the product pH=7. Then the solid product was dried at 100°C to constant weight to obtain lithium bismuthate material.

[0048] (2) Adopt the JEOLJEM-3010 type scanning electron microscope to test the lithium bismuth oxide material prepared in embodiment 1 and the nickel hydroxide material used in embodiment 1~5 respectively, as figure 1 As shown, the prepared lithium bismuth oxide material is composed of nanoparticles stacked into irregular aggregates. Such as figure 2 As shown, the nickel hydroxide material used is composed of microspheres with a diameter of about 5-15 μm.

[00...

Embodiment 2

[0055] (1) Weigh 40mmol LiOH·H 2 O was dissolved in 50 mL of deionized water, and then pressed by LiOH·H 2 O and NaBiO 3 2H 2 O is a molar ratio of 3:1, a certain amount of NaBiO 3 2H 2 O was added to the above solution, stirred at room temperature for 30 min, and then the mixed solution was transferred to a high-pressure reactor with a volume filling rate of 0.4. The reactor was placed at 130°C, hydrothermally treated for 48 h, and then cooled to room temperature. Then the hydrothermal product is subjected to solid-liquid separation and washed until neutral, and then the solid is dried at 100°C to constant weight to prepare lithium bismuthate.

[0056] (2) Adopt the JEOLJEM-3010 type scanning electron microscope to test the lithium bismuth oxide material prepared by embodiment 2, such as image 3 As shown, the lithium bismuthate material is composed of particles with a size of about 0.2-0.8 μm.

[0057] (3) step with (3) in embodiment 1.

[0058] (4) Put the prepared l...

Embodiment 3

[0061] (1) Weigh 40mmol LiOH·H 2 O was dissolved in 50 mL of deionized water, and then pressed by LiOH·H 2 O and NaBiO 3 2H 2 O is a molar ratio of 4:1, a certain amount of NaBiO 3 2H 2 O was added to the above solution, stirred at room temperature for 30 min, and then the mixed solution was transferred to an autoclave with a volume filling rate of 0.5, and the autoclave was placed at 120°C, hydrothermally treated for 60 h and then cooled to room temperature. Then the hydrothermal product is subjected to solid-liquid separation and washed until neutral, and then the solid is dried at 100°C to constant weight to prepare lithium bismuthate.

[0062] (2) Adopt XRD-6000 type X-ray diffractometer to test the lithium bismuth oxide material prepared by embodiment 3, as Figure 6 As shown, the sample has obvious characteristic peaks at 2θ=19°, 20°, 28°, 33°, 35°, 42°, 46°, 51° and other positions, and the standard card (JCPDS No.52-0348 ) are consistent, and the corresponding cr...

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Abstract

The invention relates to a lithium bismuthate/nickel hydroxide secondary alkaline battery and a preparation method thereof. The preparation method utilizes a lithium bismuthate material as a negative electrode active material of the battery, a nickel hydroxide material as a positive electrode active material of the battery and an alkaline solution as an electrolyte solution. The battery has a voltage window of 0.2 to 1.4V. A preparation method of the lithium bismuthate material comprises preparing a mixed solution from a lithium raw material and NaBiO3 according to a certain molar ratio, and carrying out a reflux reaction process at 90 to 110 DEG C for 2 to 72 hours, or carrying out hydrothermal treatment on the mixed solution in a reactor at 120 to 200 DEG C for 2 to 96 hours. The prepared battery has a capacitance of 166 mAh/g at current density of 0.5 A/g and a capacitance of 143 mAh/g at current density of 5 A/g, has characteristics of large capacitance, good cycle stability and environmental friendliness, and is a novel electrochemical power source with a wide application prospect.

Description

technical field [0001] The invention relates to a lithium bismuthate / nickel hydroxide secondary alkaline battery and a preparation method thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] With the development of industry and the growth of population, people's demand for energy is also increasing. Due to the over-exploitation of fossil energy in recent decades, the energy is gradually exhausted, so we urgently need to develop new renewable energy. Although we have developed a variety of renewable energy sources such as wind energy and solar water energy in contemporary times, their use is limited due to the instability of these natural energy sources, but we can solve these problems through energy storage, transfer, backup, etc. Among them, chemical batteries have become the best choice for energy storage due to their high conversion efficiency, high energy density, less environmental pollution, easy portability, and e...

Claims

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Application Information

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IPC IPC(8): H01M10/30H01M4/485H01M10/28
CPCH01M4/485H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 刘恩辉蒋海霞杨锃王洛
Owner XIANGTAN UNIV
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