34results about How to "Easy to expand industrial application" patented technology

The present invention discloses a Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate, selenium powder and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material. According to the present invention, graphene oxide, ammonium thiotungstate, selenium powder and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal method and the subsequent heat treatment method are used to successfully prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material; and the method has advantages of simpleness, convenience, and easy industrial application expanding.

The invention discloses a preparation method of a small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial. The method includes the steps that S1, graphene oxide is dispersed into water, quaternary phosphonium salt is added and evenly mixed, and then molybdate, selenium powder and hydrazine are sequentially added and evenly mixed; S2, a mixed dispersion system obtained in the S1 is subjected to hydrothermal reaction and cooled, a solid product is collected through centrifugation, washed, dried and subjected to heat treatment under nitrogen or argon atmosphere, and then the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial can be obtained through preparation. With graphene oxide, molybdate, selenium powder and hydrazine as raw materials, the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial is successfully prepared through the hydrothermal method assisted by quaternary phosphonium salt and the subsequent heat treatment method. The method has the advantages of being simple and convenient to implement, and the industrialized application range of the method can be easily widened.

The invention discloses a MoS2 perforated nanosheet / graphene composite nanomaterial and a preparation method thereof. The MoS2 perforated nanosheet / graphene composite nanomaterial is composited by a single layer or a few layers of MoS2 perforated nanosheets and graphene, and a substance ratio of MoS2 to graphene is (1:1)-(1:3). The preparation method of the MoS2 perforated nanosheet / graphene composite nanomaterial comprises the steps as follows: graphene oxide is ultrasonically dispersed in deionized water firstly, added with cationoid pillar [5] arene supermolecules, sufficiently stirred and then sequentially added with L-cysteine and sodium molybdate, and L-cysteine and sodium molybdate are sufficiently stirred and dissolved; and the hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 20-24 hours at the temperature of 230-250 DEG C and is naturally cooled to the room temperature and solid products are collected centrifugally, sufficiently washed by deionized water, dried and subjected to thermal treatment in nitrogen / hydrogen atmosphere to prepare the MoS2 perforated nanosheet / graphene composite nanomaterial. The method has the advantages of simplicity and convenience.

The invention discloses a multi-edge WS2 / graphene electrochemical magnesium storage composite electrode and a preparation method thereof. An electrochemical magnesium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared multi-edge WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil as a current collector is uniformly coated with the slurry, and after the slurry is dried, the composite electrode is obtained through rolling. The prepared multi-edge WS2 / graphene electrochemical magnesium storage composite electrode has high electrochemical magnesium storage capacity.

The invention discloses a preparation method of a less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode. The method comprises steps as follows: S1, dispersing graphene oxide into water, adding quaternary phosphonium salt, evenly mixing the mixture, then sequentially adding molybdate and a sulfur source, and evenly mixing the mixture; S2, subjecting a mixed disperse system obtained in S1 to a hydrothermal reaction, performing cooling, performing centrifugal collection of a solid product, performing washing and drying, performing heat treatment in the argon or nitrogen atmosphere, and a less-layer MoS2 / phosphorus-doped graphene composite nanomaterial is prepared; S3, taking the composite nanomaterial obtained in S2 as an electrochemical sodium-storage substance to prepare the composite electrode. The graphene oxide, the molybeate and the sulfur source are used as raw materials, and the less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode is successfully prepared with a hydrothermal method, the heat treatment method and the like assisted by quaternary phosphonium salt. The method has the advantages of simplicity, convenience and easiness of industrial application enlargement.

The invention discloses a preparation method of a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode. The method comprises the following steps of: S1, dispersing graphene oxide in water, adding quaternary phosphonium salt to carry out uniform mixing, then sequentially adding ammonium thiomolybdate and hydrazine and carrying out uniform mixing; S2, performing a hydrothermal reaction on a mixed disperse system obtained in S1, carrying out cooling, centrifugally collecting a solid product, washing and drying the solid product, and then carrying out heat treatment in the argon or nitrogen atmosphere to prepare and obtain a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene composite nano material; S3, using the composite nano material obtained in S2 as an electrochemical lithium storage active substance to prepare the composite electrode. According to the preparation method, the graphene oxide, the ammonium thiomolybdate and the hydrazine are used as raw materials and by methods of quaternary phosphonium salt assisted hydrothermal, heat treatment and the like, the graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode is successfully prepared. The method disclosed by the invention has the advantages of simplicity, convenience and easiness in enlarging industrial application.

The invention discloses a multi-edge MoS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. The electrochemical lithium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano material, the ratio of the amount of substance of MoS2 to graphene in the composite nano material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80-85% of multi-edge MoS2 nanosheet / graphene composite nano material, 5-10% of acetylene black and 5-10% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano material, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil with the slurry, and rolling to obtain the composite electrode. The prepared multi-edge MoS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage volume.

The invention discloses a multi-edge WS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. An electrochemical lithium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80%-85% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 5%-10% of acetylene black and 5%-10% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil is coated with the slurry, and the electrode is prepared through rolling. The prepared multi-edge WS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage capacity.

The invention discloses a multi-edge WS2 / graphene electrochemical sodium storage composite electrode and a preparation method thereof. The chemical sodium storage active substance is a composite nano material of few-layer multi-edge WS2 nano sheet and graphene; the substance amount ratio of the WS2 to graphene in the composite nano material is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of multi-edge WS2 nano sheet / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the following steps: preparing a few-layer multi-edge WS2 nano sheet / graphene composite nano material; blending the prepared composite nano material, acetylene black and polyvinylidene fluoride into uniform slurry; uniformly smearing the slurry on a copper foil serving as a current collector; and drying and rolling to obtain the multi-edge WS2 / graphene electrochemical sodium storage composite electrode. Through the invention, the prepared multi-edge WS2 / graphene electrochemical sodium storage composite electrode has high electrochemical sodium storage capacity.

The invention discloses a multi-edge MoS2 nano piece / graphene electrochemical magnesium storage composite electrode and a preparation method thereof, wherein an electrochemical magnesium storage active substance is a composite nanomaterial of few layers of multi-edge MoS2 nano pieces and graphene; the ratio of the amount of substance of MoS2 to the graphene in the composite nanomaterial is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of the multi-edge MoS2 nano piece / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps of firstly, preparing the multi-edge MoS2 nano piece / graphene composite nanomaterial, mixing the obtained composite nanomaterial with the acetylene black and the polyvinylidene fluoride to prepare even paste, evenly coating foamy copper taken as a current collector with the paste, drying, and rolling to obtain the electrochemical magnesium storage composite electrode. The electrochemical magnesium storage composite electrode has the high electrochemical magnesium storage capacity.

The invention discloses a Mo0.5W0.5S2 nanotile and graphene composite nanomaterial and a preparation method thereof. The Mo0.5W0.5S2 nanotile and graphene composite nanomaterial is formed by compounding a Mo0.5W0.5S2 nanotile with few layers and graphene, wherein the mass ratio of the Mo0.5W0.5S2 nanotile to graphene ranges from 1 to 1-1 to 4. The preparation method comprises the following steps of firstly, ultrasonically dispersing graphene oxide into deionized water; then, adding a gemini surfactant, and sufficiently stirring; next, sequentially adding L-cysteine, ammonium thiomolybdate and ammonium thiotungstate, and sufficiently stirring to dissolve L-cysteine, ammonium thiomolybdate and ammonium thiotungstate; and transferring the mixed dispersion system into a hydrothermal reaction kettle to carry out hydrothermal reaction at the temperature of 230-250 DEG C for 20-24h, then, naturally cooling to the room temperature, centrifuging to collect a solid product, sufficiently washing with deionized water, drying, and finally, carrying out heat treatment at a nitrogen and hydrogen mixed atmosphere to obtain the Mo0.5W0.5S2 nanotile and graphene composite nanomaterial. The method disclosed by the invention has the characteristics of simplicity and convenience; in addition, no organic solvent is needed to be consumed. The prepared composite nanomaterial is widely applied as a lithium ion battery electrode material and an electrocatalytic material.