阅读说明：本技术 一种三维石墨烯基镍-钼纳米线水系电池正极的制备方法 (Preparation method of three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode ) 是由 陈一鸣 舒珺 蔡雨洋 刘芳 徐林 侯力 于 2020-08-13 设计创作，主要内容包括：本发明公开了一种三维石墨烯基镍-钼纳米线水系电池正极的制备方法,属于电池电极技术领域,包括以下步骤：S1、配制氧化石墨烯溶液10mL,S2、选将50mg的钼酸镍纳米线加入到氧化石墨烯分散液中,利用超声分散仪对混合溶液进行分散混合,制得均一稳定的分散液,S3、准备好预先加工好的叉指型微模具,利用O2等离子体处理5分钟,S4、取叉指型微模具,将氧化石墨烯与钼酸镍纳米线分散液注入叉指型微模具,并冷冻干燥,制得微型电极。本发明中,制作工艺简单,能够降低生产成本,在使用过程中,能够保障良好的电化学性能。(The invention discloses a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode, belonging to the technical field of battery electrodes and comprising the following steps of: s1, preparing 10mL of graphene oxide solution, S2, adding 50mg of nickel molybdate nanowires into the graphene oxide dispersion liquid, dispersing and mixing the mixed solution by using an ultrasonic disperser to prepare uniform and stable dispersion liquid, S3, preparing a pre-processed interdigital micromold, treating for 5 minutes by using O2 plasma, S4, taking the interdigital micromold, injecting the graphene oxide and the nickel molybdate nanowire dispersion liquid into the interdigital micromold, and freeze-drying to prepare the microelectrode. The invention has simple manufacturing process, can reduce the production cost and can ensure good electrochemical performance in the using process.)

1. A preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode is characterized by comprising the following steps:

s1, preparing 10mL of graphene oxide solution;

s2, adding 50mg of nickel molybdate nanowires into the graphene oxide dispersion liquid, and dispersing and mixing the mixed solution by using an ultrasonic disperser to prepare uniform and stable dispersion liquid;

s3, preparing the pre-processed interdigital micromold by using O₂Plasma treatment for 5 minutes;

s4, taking the interdigital micro-mold, injecting the graphene oxide and the nickel molybdate nanowire dispersion liquid into the interdigital micro-mold, and freeze-drying to obtain the micro-electrode;

and S5, placing the obtained micro electrode in a tube furnace, and preserving heat for 2 hours in a nitrogen atmosphere to obtain the three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode.

2. The method for preparing the three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode according to claim 1, further comprising the following steps according to the steps in S1:

s101, weighing dried graphene oxide solid, removing impurities, and cutting the dried graphene oxide solid into blocks;

s102, dissolving the impurity-removed graphene oxide solid in ultrapure water, and performing ultrasonic treatment to obtain a uniformly dispersed graphene oxide solution.

3. The preparation method of the three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode according to claim 2, characterized by comprising the following steps: and (4) carrying out ultrasonic treatment by using an ultrasonic instrument according to the operation steps in the step S102, wherein the treatment time is 1-2 hours.

4. The preparation method of the three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode according to claim 1, characterized by comprising the following steps: according to the operation procedure in S1, the concentration of the graphene oxide solution is 5 mg/m.

5. The preparation method of the three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode according to claim 1, characterized by comprising the following steps: according to the operation procedure in S3, O is used₂During plasma treatment, the holding voltage was 600V and the current was 150 mA.

6. The preparation method of the three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode according to claim 1, characterized by comprising the following steps: according to the procedure in S5, the temperature was maintained at 300 ℃ for 2 hours at a rate of 2 ℃/min.

Technical Field

The invention relates to the technical field of battery electrodes, in particular to a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode.

Background

The positive electrode of the battery is a component in the battery and is used as two ends for inputting or outputting current in a conductive medium (solid, gas, vacuum or electrolyte solution). One pole of the input current is called anode or positive pole, and the other pole of the output current is called cathode or negative pole.

Batteries are considered to be important devices for supplying power due to their numerous advantages, such as high specific energy. With the development of modern manufacturing technology, batteries will be widely used in the fields of electronic devices, communication devices, and the like.

When the traditional battery anode is prepared, the preparation process flow is complex, the production cost can be increased, and meanwhile, the prepared battery anode has poor electrochemical performance in the using process and influences the use of the battery anode, so that a preparation method of the battery anode which is convenient to manufacture and improves the electrochemical performance is urgently needed.

Disclosure of Invention

The invention aims to provide a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode, which is simple in manufacturing process, capable of reducing production cost and capable of guaranteeing good electrochemical performance in the using process.

In order to achieve the above effects, the present invention provides the following technical solutions: a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode is characterized by comprising the following steps:

s1, preparing 10mL of graphene oxide solution.

S2, adding 50mg of nickel molybdate nanowires into the graphene oxide dispersion liquid, and dispersing and mixing the mixed solution by using an ultrasonic disperser to prepare uniform and stable dispersion liquid.

S3, preparing the pre-processed interdigital micromold by using O₂Plasma treatment was carried out for 5 minutes.

S4, taking the interdigital micro-mold, injecting the graphene oxide and nickel molybdate nanowire dispersion liquid into the interdigital micro-mold, and freeze-drying to obtain the micro-electrode.

And S5, placing the obtained micro electrode in a tube furnace, and preserving heat for 2 hours in a nitrogen atmosphere to obtain the three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode.

Specifically, according to the operation step in S1, the method further includes the following operation steps:

s101, weighing the dried graphene oxide solid, removing impurities, and cutting the dried graphene oxide solid into blocks.

S102, dissolving the impurity-removed graphene oxide solid in ultrapure water, and performing ultrasonic treatment to obtain a uniformly dispersed graphene oxide solution.

Specifically, according to the operation step in S102, ultrasonic treatment is performed with an ultrasonic instrument for 1 to 2 hours.

Specifically, according to the operation procedure in S1, the concentration of the graphene oxide solution is 5 mg/m.

Specifically, according to the operation procedure in S3, when the O2 plasma treatment was used, the holding voltage was 600V and the current was 150 mA.

Specifically, according to the operation procedure in S5, the temperature was maintained at 300 ℃ for 2 hours at a temperature rise rate of 2 ℃/min.

The invention provides a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode, which has the following beneficial effects:

(1) according to the preparation method, the graphene oxide solution is prepared firstly, the nickel molybdate nanowire solution is prepared into the dispersion liquid, the dispersion liquid is injected into the interdigital micro-mold, the micro-electrode can be prepared by freeze drying, and the heat preservation treatment is carried out in the tubular furnace, so that the three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode is prepared, the preparation process is simple, and the production cost can be reduced.

(2) According to the invention, the three-dimensional water-based battery anode is prepared by utilizing the two-dimensional property of the large graphene and combining the high-capacity characteristic of the nickel molybdate nanowire, and the good electrochemical performance can be ensured in the using process.

Drawings

Fig. 1 is a general flowchart of a method for preparing a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode;

fig. 2 is a flow chart of a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery positive electrode for preparing a graphene oxide solution;

fig. 3 is a scanning electron microscope image and an XRD image of a nickel molybdate nanowire of the method for preparing a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery anode;

FIG. 4 is a scanning electron microscope image of a three-dimensional aqueous battery anode of a method for preparing a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery anode;

fig. 5 is an electrochemical performance characterization diagram of a three-dimensional aqueous battery anode of a preparation method of a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery anode.

Detailed Description

The invention provides a technical scheme that: referring to fig. 1 to 5, a method for preparing a three-dimensional graphene-based nickel-molybdenum nanowire aqueous battery anode includes the following steps:

(1) and preparing 10mL of graphene oxide solution.

(2) And adding 50mg of nickel molybdate nanowires into the graphene oxide dispersion liquid, and dispersing and mixing the mixed solution by using an ultrasonic disperser to prepare uniform and stable dispersion liquid.

(3) Preparing the pre-processed interdigital micro-mould by using O₂Plasma treatment was carried out for 5 minutes.

(4) And taking the interdigital micro-mold, injecting the graphene oxide and the nickel molybdate nanowire dispersion liquid into the interdigital micro-mold, and freeze-drying to obtain the micro-electrode.

(5) And placing the obtained micro electrode in a tubular furnace, and preserving heat for 2 hours in a nitrogen atmosphere to obtain the three-dimensional graphene-based nickel-molybdenum nanowire water-based battery anode.

Further, according to the operation steps in (1), the method further comprises the following operation steps:

(101) weighing the dried graphene oxide solid, removing impurities, and cutting the dried graphene oxide solid into blocks.

(102) And dissolving the impurity-removed graphene oxide solid in ultrapure water, and performing ultrasonic treatment to obtain a uniformly dispersed graphene oxide solution.

Further, according to the operation procedure in (102), ultrasonic treatment is carried out by using an ultrasonic instrument, and the treatment time is 1-2 hours.

Further, according to the operation procedure in (1), the concentration of the graphene oxide solution is 5 mg/m.

Further, according to the operation procedure in (3), in the case of the treatment with O2 plasma, the holding voltage was 600V and the current was 150 mA.

Further, according to the operation procedure in (5), the temperature was maintained at 300 ℃ for 2 hours at a temperature rise rate of 2 ℃/min.