Electrochemical preparation method of LiFeAs superconductor

A superconducting and electrochemical technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of high requirements on experimental conditions and long period of LiFeAs superconductor, and achieve simple process equipment, The effect of rapid preparation and lower production cost

Inactive Publication Date: 2011-09-21
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0006] The characteristic of the above method is to carry out at high temperature, some also need to add high pressure conditions, the cycle of the whole preparation of LiFeAs superconductor is long, that is, the overall experimental conditions are relatively high

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  • Electrochemical preparation method of LiFeAs superconductor
  • Electrochemical preparation method of LiFeAs superconductor
  • Electrochemical preparation method of LiFeAs superconductor

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[0029] figure 1 It is a flow chart of the electrochemical preparation method of a LiFeAs superconductor of the present invention to prepare the positive electrode, as figure 1 Shown: The ingredients and mass percentages of selected electrodes are: FeAs powder 66%-74%, acetylene black 14%-18%, binder 12%-16%; mix 0.1-1mL N-methylpyrrolidone with the Put the ingredients and ingredients of the above electrodes together into a mortar, mix and grind them into gel, and apply them on a clean metal foil to make an electrode sheet; place the electrode sheet in a drying oven, pre-dry it at 50-75°C, and wait for N- After the methylpyrrolidone is completely volatilized, lightly press the electrode sheet on the press, and then vacuum-dry it in a drying oven at 110-150°C for 2-3 hours until the electrode sheet is completely dry. After the temperature gradually drops to room temperature, take out the electrode sheet and print it After preparing the shape of the electrode, put it in a vacuum...

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Abstract

The invention relates to an electrochemical preparation method of an LiFeAs superconductor, comprising the following steps of: firstly, preparing the positive pole for structuring a battery, i.e. mixing FeAs powder with acetylene black, a bonder and methyl pyrrolidone according to a proportion in a mortar, and grinding into colloids; spreading the colloid on a clean base plate; preparing a positive pole piece through drying, compacting and drying; then assembling the battery, wherein the battery must be assembled in a glove box filled with protective gases, that moisture of the glove box is ensured to be less than 1 ppm, two poles of the battery must comprise an Li pole and the prepared positive pole and are separated by an electrolyte membrane, and a proper amount of electrolyte is addedto the battery; and finally charging the assembled battery to produce the LiFeAs superconductor on the positive pole. The invention has simpler process device, short preparation period and low production cost and is more suitable for preparing the LiFeAs superconductor in a laboratory.

Description

technical field [0001] The invention relates to a preparation method of a superconductor, in particular to an electrochemical preparation method of a LiFeAs superconductor. Background technique [0002] Since their discovery, superconductors have attracted much attention because of their properties of zero resistance and diamagnetism. [0003] On February 18, 2008, Japanese scientists reported a new iron-based superconductor (KamiharaY, Watanabe T, Hirano M, et al. Iron-based layered superconductor La[O 1-x f x ]FeAs(x=0.05-0.12) with Tc=26 K.J Am Chem Soc, 2008, 130:3296-3299), they achieved superconductivity at 26K by doping F into the matrix; on March 25 of the same year, Chen Xianhui et al. obtained the iron-based compound superconductor with a critical temperature of 43 Kelvin (-230.15°C) for the first time in the world, breaking through the "Macmillan limit", and confirmed that the FeAs-based superconductor is an unconventional superconductor (X.H.Chen, T.Wu, G .Wu,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00H01B13/00
CPCY02E40/64Y02E40/60
Inventor 陈宁屈少鹏李阳张睿赵海雷
Owner UNIV OF SCI & TECH BEIJING
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