The invention discloses a photocatalyst Li2Cu2Ge2O7 with visible light response and a preparation method thereof. The chemical formula of the photocatalyst is Li2Cu2Ge2O7. The invention also discloses a preparation method of the material. The obtained photocatalyst has the advantages of wide spectral response range, high light conversion efficiency, good stability, and the like, and irradiated by visible light, the photocatalyst has the function of decomposing harmful chemical substances and organic biomass and the function of sterilization. Besides, the preparation method is simple, is low in synthesis temperature and cost and is suitable for industrial production and application.

Photocatalyst Li2Cu2Ge2O7 with visible light response and preparation method thereof

The invention relates to a negative material for a sodium-ion battery and a preparation method of the negative material. The material is iron borate with a norbergite structure; the molecular formula is Fe3BO6; an iron source and a boron source are mixed evenly in preparation, and are sintered in an oxidizing atmosphere condition; the mixture is cooled, washed and dried to prepare an iron borate material; and the iron borate material can be used as the negative material for the sodium-ion battery. Compared with the prior art, the negative material is wide in raw material source, low in price and friendly to environment, and has the characteristics of being simple in preparation technique process, low in equipment requirements, high in product purity, good in safety performance and the like; and the prepared iron borate material has relatively good sodium storage capability, and excellent electrochemical properties and rate capability.

Negative material for sodium-ion battery and preparation method of negative material

The invention relates to a cathode material for an aqueous sodium-ion battery with a high voltage NASICON structure. The chemical formula of the cathode material is AxTi2-yMy(PO4)3-sigmaNsigma. A compounding method for the cathode material for the aqueous sodium-ion battery with the high voltage NASICON structure comprises the following steps: mixing alkali metal A source, titanium dioxide, dopedelement M source, phosphoric acid, acid corresponding to substituted acid radical N and deionized water, thus obtaining a precursor gel, and then adopting a gel thermal method for reacting and compounding the precursor gel, thus obtaining a target product. The cathode material has the beneficial effects of high charge-discharge platform voltage, capability of reducing the hydrogen evolution degreein the charging process of the cathode of the aqueous sodium-ion battery and characteristics of simple operation, high industrial degree, low manufacturing cost and high stability.

Cathode material for aqueous sodium-ion battery with high voltage NASICON structure and compounding method thereof

The invention discloses a lanthanum-doped sodium-ion battery anode material. The molecular formula of the lanthanum-doped sodium-ion battery anode material is Na(Ni0.33Fe0.33Mn0.33)1-xLaxO2, and in the formula, x ranges from 0.001 to 0.1. A preparation method of the lanthanum-doped sodium-ion battery anode material comprises the following steps: adding soluble nickel salt, ferric salt, manganese salt, lanthanum salt and sodium salt into deionized water, uniformly stirring and dissolving so as to obtain a corresponding mixed salt solution, adding a citric acid solution into the mixed salt solution, performing reaction for a certain time in a medium temperature water bath, adding ammonia water to adjust the pH value, performing reaction for a certain time at a high-temperature water bath so as to obtain precursor gel, and finally performing drying, grinding, presintering and high-temperature sintering on the precursor gel, thereby obtaining the lanthanum-doped sodium-ion battery anode material. The anode material disclosed by the invention can be applied to sodium-ion batteries, is high in specific capacity, excellent in multiplying power, wide in raw material source, low in price, simple in preparation method, good in operability, good in repeatability and good in application development prospect.

Lanthanum-doped sodium-ion battery anode material and preparation method thereof

The invention relates to NaCuVO4 nanoparticles and a preparation method thereof; the NaCuVO4 nanoparticles can be used as a negative electrode material of a sodium ion battery, and the preparation method comprises the following steps: 1) firstly, weighing NaCO3, Cu(NO3)22H2O and a vanadium source with the molar ratio of 1:2:1 to 1:2:3, respectively adding water and dissolving, then mixing, and stirring evenly; 2) in the solution obtained in the step 1), adding citric acid as a complexing agent, stirring evenly, then placing in a water bath kettle, and carrying out water bath stirring; 3) drying the solution obtained in the step 2); 4) putting the dried substance obtained in the step 3) in a muffle furnace, and sintering in an air atmosphere; and 5) grinding the white product obtained in the step 4), and thus obtaining the NaCuVO4 nanoparticles The NaCuVO4 nanoparticles have the beneficial effects that based on uniformity and good electrical conductivity of the prepared nanoparticles, the electrode shows excellent multiplying power, high specific capacity and good cycling stability when used as the negative electrode material of the sodium ion battery

NaCuVO4 nanoparticles and preparation method and application thereof

The invention provides a negative electrode material, a preparation method thereof and a lithium ion battery with the same, and belongs to the technical field of lithium ion battery materials. The molecular formula of the material is LiCuVO4. The preparation method of the negative electrode material comprises the steps of fully grinding lithium carbonate, vanadium pentoxide and copper oxide, mixing to obtain a powder mixture, pressing the powder mixture to obtain pieces, and sintering the pieces in a muffle furnace for at least two days. According to the invention, LiCuVO4 is firstly utilized as the negative electrode material of the lithium ion battery, the lithium ion battery with the negative electrode material has the good electrochemical property, and an experiment result proves that the initial discharge specific capacity of the lithium ion battery reaches 814mAh/g, the initial charge specific capacity of the lithium ion battery reaches 427mAh/g, and the capacity of the battery can still reach 697.1mAh/g after 50 charge-discharge cycles.

Negative electrode material, preparation method thereof and lithium ion battery with same

The invention provides a negative electrode material of a sodium ion secondary battery, belongs to the technical field of sodium ion secondary battery materials, and solves the problem that the circulating performance of an existing negative electrode material of the sodium ion battery is poor. The molecular formula of the material is Na3V2(PO4)3. The invention further provides a preparation method of the negative electrode material of the sodium ion secondary battery. The invention further provides the sodium ion secondary battery prepared from the negative electrode material of the sodium ion secondary battery. The sodium ion battery adopts the negative electrode material provided by the invention, so that the sodium ion battery has the good electrochemical performance and safety performance; an experiment result shows that, in the first time, the charging specific capacity can be up to 224.9mAh/g, and the discharging specific capacity is up to 125.8mAh/g; and the specific capacity is stabilized to be about 139mAg/g after 50 times of cycles.

Negative electrode material of sodium ion secondary batter, preparation method of negative electrode material, as well as sodium ion battery

The invention discloses a molybdate polyanionic lithium battery negative material and a preparation method thereof, belonging to the technical field of lithium ion battery electrode materials. The lithium battery negative material has a molecular formula of LiFe(MoO4)2. The preparation process comprises the following steps: mixing raw material oxides and performing wet grinding to form a powder mixture, pressurizing the powder mixture to form powder mixture sheets, and sintering the powder mixture sheets to obtain the lithium battery negative material. The molybdate polyanionic lithium battery negative material has the characteristics of good single phase and crystallinity, stable structure, good cycle performance and the like, and has extremely high specific discharge capacity in a deep discharge process; moreover, the preparation method is simple, has low process requirements and is applicable to industrial batch production.

Molybdate polyanionic lithium battery negative material and preparation method thereof

The invention provides a sodium-magnesium secondary battery, which comprises a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode comprises TiS2; the negative electrode is a magnesium metal; and the electrolyte is an organic solution system containing sodium ions and magnesium ions. Only the magnesium metal exists in the negative electrode and only precipitation and dissolution of the magnesium metal are carried out in the charging and discharging processes, so that the problem of poor cycle performance since a lithium metal is not easily intercalated and deintercalated is solved. The organic solution system containing the sodium ions and the magnesium ions is taken as the electrolyte of the secondary battery, so that the defects of low capacity and poor reversibility of an electrolyte battery which simply contains the magnesium ions, poor rate capability and fast capacity degradation caused by the polarization effect of the magnesium ions are improved. The organic solution system containing the sodium ions and the magnesium ions is taken as the electrolyte of the secondary battery, so that dendritic crystal caused by directly adopting metal ions is avoided and the safety is improved. The lithium metal is not used by the electrolyte and an electrode material, so that the cost of the battery is effectively reduced.

Sodium-magnesium secondary battery and preparation method thereof

The invention provides an application of molybdenum-vanadium oxide as a lithium battery anode material. The molecular formula of the molybdenum-vanadium oxide is NaVMoO6 and the space group is C2/m. The molybdenum-vanadium oxide belongs to a monoclinic system. Vanadium atoms and oxygen atoms are in mirror symmetry and occupy the same position to form (V,Mo)O6 octahedrons with surrounding oxygen atoms. The octahedrons form a (VMoO6) layer via common edges to form a two-dimensional frame structure, and sodium ions are located among (V,Mo)O6 interlayers, and the lattice parameters of the structure are: a=9.4214 angstrom, b=3.6520 angstrom, c=7.2337 angstrom, and alpha=90.0000 degrees, beta=111.0400 degrees and gamma=90.0000 degrees. Because the NaVMoO6 has excellent single phase and crystallinity properties, stable structure and excellent performance, the molybdenum-vanadium oxide of the invention has excellent cycling stability and capacity retention ratio while being used as the anode material.

Application of molybdenum-vanadium oxide as lithium battery anode material

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