A new type of sulfur-based material electrode and its preparation method and application
An electrode, sulfur-based technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as unfavorable large-scale production, high production cost, complex production process, etc., and achieve cheap synthetic raw materials, simple and easy methods, and cycle performance. excellent effect
Active Publication Date: 2018-07-17
XIAMEN UNIV
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Problems solved by technology
[0003] However, the production cost of nanomaterials and carbon coating modification methods is relatively high, and the production process is complicated, which is not conducive to large-scale production.
Method used
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Embodiment 1
[0025] Material preparation:
[0026] 14g of FeSO 4 ·7H 2 O and 12.5 g Na 2 S 2 o 3 ·5H 2 O was dissolved in the same 50 mL portion of deionized water to obtain FeSO 4 ·7H 2 O and Na 2 S 2 o 3 ·5H 2O solution, magnetically stirred for 15 minutes, transferred the solution to the reaction kettle, naturally heated to 200 ° C in a blast oven for 24 hours, and then cooled to room temperature, then took it out, and filtered and washed it with absolute ethanol and deionized water several times. Calcinate the final material at 500°C for 10 hours in an argon atmosphere to obtain gray-black FeS 2 Material.
[0027] Material Characterization:
[0028] The crystal structure of the material was analyzed by an XRD diffractometer (taken out from the muffle furnace using a Philips X, cooled to room temperature in air to obtain a diffractometer and a Cu KSu ray source). figure 1 . From figure 1 It can be seen that the uncalcined iron sulfide phase is impure after hydrothermal s...
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Abstract
The invention relates to a novel sulfenyl material electrode and a preparation method and application thereof, and relates to an electrode material. The sulfenyl material electrode at least comprises a sulfenyl compound and a current collector, wherein the sulfenyl compound is at least one of an iron-sulfur compound, a nickel-sulfur compound, a cobalt-sulfur compound, a molybdenum-sulfur compound, a titanium-sulfur compound and the like; and the current collector is a film layer or a foil-shaped substance. The preparation method comprises the following steps of: adding water-soluble iron inorganic salt and a sulfur-containing compound to deionized water, and stirring into a clear transparent light-green solution; transferring the solution into a high-molecular polymer liner for hydrothermal reaction; washing a product to obtain a sulfur-iron compound; calcining, and then mixing with a conductive agent and an adhesive agent to prepare slurry; then coating on the current collector, and carrying out electrochemical circulating activation to obtain the sulfenyl material electrode. The sulfenyl material electrode disclosed by the invention can be used as the negative pole of a secondary battery or the positive pole of the secondary battery, and the secondary battery mainly means a secondary lithium ion battery.
Description
technical field [0001] The invention relates to electrode materials, in particular to a novel sulfur-based material electrode and its preparation method and application. Background technique [0002] In recent years, more and more researchers have studied the electrochemical properties of transition metal sulfides. The electrochemical reaction of this kind of material involves the participation of many electrons, so it has the characteristics of high specific capacity and high specific energy. For example, CuS (Chung, J.S. and H.J.Sohn (2002). "Electrochemical behaviors of CuS as a cathode material for lithium secondary batteries." Journal of Power Sources 108 (1–2):226-231.), Cu 2 S(Lai,C.-H.,et al.(2010)."Direct growth of high-rate capability and high capacity copper sulfide nanowire array cathodes for lithium-ion batteries."Journal of Materials Chemistry20(32):6638.), FeS 2 (Son,S.-B.,et al.(2014)."A Stabilized PAN-FeS 2 Cathode with an EC / DEC Liquid Electrolyte."Adva...
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IPC IPC(8): H01M4/136H01M4/1397
CPCH01M4/136H01M4/1397Y02E60/10
Inventor 赵金保王昀晖李雪
Owner XIAMEN UNIV