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Stable compound lithium ion battery negative electrode material alpha-Ga2O3 and preparation method thereof

A technology of lithium ion battery and negative electrode material, applied in the field of electrochemical power supply, can solve the problems of unfamiliar lithium ion diffusion in electrical properties, etc., and achieve the effects of simple and controllable method, good repeatability, and low preparation temperature

Active Publication Date: 2018-02-23
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Those who have long been engaged in the research of semiconductor material luminescence are not familiar with its electrical properties, lithium ion diffusion and other properties, so that it is difficult to apply it to the field of energy storage electrochemistry

Method used

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  • Stable compound lithium ion battery negative electrode material alpha-Ga2O3 and preparation method thereof
  • Stable compound lithium ion battery negative electrode material alpha-Ga2O3 and preparation method thereof
  • Stable compound lithium ion battery negative electrode material alpha-Ga2O3 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First weigh 5 mmol of gallium nitrate, 5 mmol of hexamethylenetetramine, 0.5 g of sodium sulfate, and 0.1 g of citric acid in a 50 ml small beaker, add deionized water to the small beaker, and stir for 20 minutes until the medicines are completely dissolved. Transfer the solution to a hydrothermal liner, add deionized water to 80% of the volume of the liner, fix the liner with an external scale, and heat it in a blast oven at 120°C for 12 hours. The samples were obtained by sintering in air at 400°C in a tube furnace for 10 h after drying in medium temperature. The prepared sample was analyzed by XRD pattern, as figure 1 As shown, the diffraction peaks (▼) and α-Ga 2 o 3 (XRD card JCPDS, NO. 06-0503) corresponds, indicating that the successful preparation of α-Ga 2 o 3 Material. The samples were characterized by SEM, by figure 2 It can be seen that it consists of micron squares with a length of 1-1.5 μm and a width and height of 200-800 nm. The α-Ga obtained b...

Embodiment 2

[0023] First weigh 5 mmol of gallium nitrate, 5 mmol of hexamethylenetetramine, 0.5 g of sodium sulfate, and 0.1 g of citric acid in a 50 ml small beaker, add deionized water to the small beaker, and stir for 20 minutes until the medicines are completely dissolved. Transfer the solution to a hydrothermal liner, add deionized water to 80% of the volume of the liner, fix the liner with an external scale, and heat it in a blast oven at 160°C for 12 hours. α-Ga 2 o 3 . The battery was assembled according to the method of Example 1. Figure 4 It shows that the α-Ga prepared in Example 2 2 o 3 Under the current density of 0.15 A / g, the first charge and discharge specific capacities of the electrodes are 776, 1331 mAh / g, and after 100 cycles, they are 82.8, 85.1 mAh / g.

Embodiment 3

[0025] First weigh 5 mmol of gallium nitrate, 5 mmol of hexamethylenetetramine, 1 g of sodium sulfate, and 0.1 g of citric acid in a 50 ml small beaker, add deionized water to the small beaker, and stir for 20 minutes until the medicines are completely dissolved. Transfer the solution to a hydrothermal liner, add deionized water to 80% of the volume of the liner, fix the liner with an external scale, and heat it in a blast oven at 200°C for 12 hours. α-Ga 2 o 3 . The battery was assembled according to the method of Example 1. Figure 5 It shows that the α-Ga prepared in Example 3 2 o 3 The first charge and discharge specific capacities of the electrode are 747.1 and 1338.7 mAh / g at a current density of 0.15 A / g, and 34.4 / 34.5 mAh / g after 100 cycles.

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Abstract

The invention provides a stable compound lithium ion battery negative electrode material, and the active component of the material comprises alpha-Ga2O3. Alpha-Ga2O3 is composed of a great amount of micrometer cubes, the length of cubes is 1-1.5 [mu]m, and the width and height are in a range of 200-800 nm. The preparation method comprises the following steps: adding gallium nitrate, hexamethylenetetramine, sodium sulfate, and citric acid into a container, adding deionized water, stirring until all components are dissolved; transferring the solution to a hydrothermal inner container, adding deionized water; fixing the inner container, carrying out hydrothermal reactions in a blowing drying oven to obtain a precursor; drying the precursor, and sintering the precursor in a tubular furnace toobtain alpha-Ga2O3. The alpha-Ga2O3 can be used to prepare a lithium ion battery negative electrode and has very good electrochemical characteristics and a wide application prospect.

Description

technical field [0001] The invention relates to a new type of lithium ion battery negative electrode, in particular to a compound Ga 2 o 3 The preparation method belongs to the field of electrochemical power sources. technical background [0002] Energy is the support of social and economic development. The massive consumption of traditional fossil energy such as coal, oil, natural gas and other energy has brought serious environmental pollution problems. The development of high-performance energy conversion devices and energy storage devices is an inevitable choice for utilizing new and renewable clean energy with random and intermittent characteristics. Lithium-ion battery has become an ideal energy storage device and has been extensively studied due to its clean and efficient, light weight, high energy density and long cycle life. [0003] The key to developing high-performance lithium-ion batteries is to develop high-performance battery materials. Among them, based o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48
CPCH01M4/364H01M4/48Y02E60/10
Inventor 倪世兵陈启长郑斌杨学林
Owner CHINA THREE GORGES UNIV
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