Preparation method of lithium-sulfur battery sandwich layer material

An interlayer material, lithium-sulfur battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of significant volume expansion effect of lithium-sulfur batteries, unstable battery electrochemical performance, etc., to achieve excellent electrochemical performance, experimental Simple and easy operation, the effect of improving cycle life

Active Publication Date: 2018-09-28
HEBEI UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention overcomes the defects of obvious polysulfide "shuttle effect" in the lithium-sulfur battery prepared by the prior art, significant v

Method used

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  • Preparation method of lithium-sulfur battery sandwich layer material
  • Preparation method of lithium-sulfur battery sandwich layer material
  • Preparation method of lithium-sulfur battery sandwich layer material

Examples

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Embodiment 1

[0028] 0.01mol (2.42g) sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) with 0.03mol (2.28g) thiourea (H 2 NSCNH 2 ) and dissolved in 50ml of deionized water to prepare a mixed solution, stirred the mixed solution with electromagnetic stirring for 30min, then added hydrochloric acid (HCl) (12mol / L) dropwise, and adjusted the pH value of the mixed solution to 0.5 to obtain solution A. 0.01mol (1.70g) copper chloride dihydrate (CuCl 2 2H 2 O) and thiourea 0.04mol (3.04g) (H2NSCNH2) and dissolved in 50ml deionized water, electromagnetically stirred until completely dissolved to obtain solution B, mixed 5mlA solution with 5mlB solution to obtain solution C, 10mlC solution was added to 30mlGO solution, obtain D solution, transfer 40ml of the mixed solution D to a reaction kettle with polytetrafluoroethylene as the substrate, place the reaction kettle in an oven, keep it warm at 180°C for 2h, and then cool the reaction kettle naturally with the oven to room temperature, subseque...

Embodiment 2

[0030] 0.01mol (2.42g) sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) with 0.05mol (3.8g) thiourea (H 2 NSCNH 2 ) and dissolved in 50ml of deionized water to prepare a mixed solution, stirred the mixed solution with electromagnetic stirring for 30min, then added hydrochloric acid (HCl) (12mol / L) dropwise, and adjusted the pH value of the mixed solution to 0.5 to obtain solution A. 0.01mol (1.70g) copper chloride dihydrate (CuCl 2 2H 2 O) and thiourea 0.05mol (3.8g) (H 2 NSCNH 2 ) and dissolved in 50ml deionized water, stirred until completely dissolved to obtain solution B, mixed 5mlA solution with 5mlB solution to obtain solution C, added 10mlC solution to 40mlGO solution to obtain D solution, and transferred the mixed solution 50mlD to In a reaction kettle with polytetrafluoroethylene as the substrate, put the reaction kettle in an oven and keep it warm at 190 ° C for 8 hours, then cool the reaction kettle to room temperature naturally with the oven, and then obtain a...

Embodiment 3

[0032] 0.01mol (2.42g) sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) with 0.06mol (4.56g) thiourea (H 2 NSCNH 2 ) and dissolved in 50ml of deionized water to prepare a mixed solution, stirred the mixed solution with electromagnetic stirring for 30min, then added hydrochloric acid (HCl) (12mol / L) dropwise, and adjusted the pH value of the mixed solution to 0.5 to obtain solution A. 0.01mol (1.70g) copper chloride dihydrate (CuCl 2 2H 2 O) and thiourea 0.08mol (6.12g) (H 2 NSCNH 2 ) and dissolved in 50ml deionized water, stirred until completely dissolved to obtain solution B, mixed 5mlA solution with 5mlB solution to obtain solution C, added 10mlC solution to 50mlGO solution to obtain D solution, and transferred 60mlD of the mixed solution to In a reaction kettle with polytetrafluoroethylene as the substrate, put the reaction kettle in an oven and keep it warm at 200 ° C for 12 hours, then cool the reaction kettle to room temperature naturally with the oven, and then ob...

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Abstract

The invention discloses a preparation method of a lithium-sulfur battery sandwich layer material. The preparation method comprises the following steps of (1) enabling sodium molybdate dihydrate and thiourea to be added to deionized water to prepare into a mixed solution A; in addition, enabling copper chloride dihydrate (and thiourea) to be added to deionized water to obtain a solution B; and (2)enabling the A solution to be mixed with the B solution to obtain a solution C, enabling the solution C to be added to a GO solution to be mixed to obtain a mixed solution D; and transferring the mixed solution D to a reaction kettle which takes polytetrafluoroethylene as a substrate, putting the reaction kettle into a drying oven, and performing heat preservation at a temperature of 180-220 DEG Cfor 2-30h to obtain the lithium-sulfur battery sandwich layer material. By adoption of the preparation method, the shortcomings of obvious "shuttle effect" of polysulfide in the lithium-sulfur battery prepared in the prior art, high volume expansion effect of the lithium-sulfur battery, instable electrochemical performance of the battery and the like are overcome, and the production process is simplified.

Description

technical field [0001] The invention relates to a preparation method of a lithium-sulfur battery interlayer material, and more particularly to a preparation method of a binary metal sulfide-doped graphene lithium-sulfur battery interlayer material. Background technique [0002] With the rapid development of related fields such as portable electronics, electric vehicles, and energy storage, the performance of batteries is increasingly required. Among the components of these electronic products, the energy storage system, especially the battery system, has increasingly become an important factor restricting the further portability, miniaturization and long-lasting battery life of the equipment. However, with the emergence of problems such as excessive consumption of earth resources and environmental pollution, higher requirements are put forward for the capacity, energy density and cycle performance of lithium-ion batteries. Graphite is still the most widely used anode materi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5815H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 张永光张俊凡
Owner HEBEI UNIV OF TECH
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