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Molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material, preparation method thereof and sodium ion battery

A sodium-ion battery, nitrogen-doped carbon technology, applied in battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc. ion weight and other issues, to achieve the effect of good cycle stability and rate performance, excellent electrochemical properties, and high reversible capacity

Inactive Publication Date: 2019-05-21
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although Na-ion batteries have many advantages, Na-ion is heavier and has a larger radius than Li, which leads to Na + Deintercalation is slow in the electrode material, which affects the cycle and rate performance of the battery

Method used

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  • Molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material, preparation method thereof and sodium ion battery
  • Molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material, preparation method thereof and sodium ion battery
  • Molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material, preparation method thereof and sodium ion battery

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Embodiment 1

[0045] The molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium-ion battery negative electrode material of this embodiment includes an inner core and a shell covering the surface of the inner core, wherein the inner core is a nitrogen-doped carbon dodecahedral nucleus, and the outer shell is MoSe 2 Nanosheets.

[0046] The preparation method of molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium ion battery negative electrode material in this embodiment comprises the following steps:

[0047] 1) Preparation of ZIF-8 precursor with dodecahedral structure:

[0048] Dissolve 175mg of zinc acetate in 100mL of methanol to obtain solution A; dissolve 263mg of 2-methylimidazole in 50mL of methanol to obtain solution B; then slowly pour solution B into solution A, and after magnetic stirring for 10min, Then aged at room temperature for 12 hours, centrifuged at 8000r / min for 10 minutes, and then dried in vacuum at 60°C for 12 hours to obtain ZIF...

Embodiment 2

[0056] The molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium-ion battery negative electrode material of this embodiment includes an inner core and a shell covering the surface of the inner core, wherein the inner core is a nitrogen-doped carbon dodecahedral nucleus, and the outer shell is MoSe 2 Nanosheets.

[0057] The preparation method of molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium ion battery negative electrode material in this embodiment comprises the following steps:

[0058] 1) Preparation of ZIF-8 precursor with dodecahedral structure:

[0059] Dissolve 175mg of zinc acetate in 100mL of methanol to obtain solution A; dissolve 263mg of 2-methylimidazole in 50mL of methanol to obtain solution B; then slowly pour solution B into solution A, and after magnetic stirring for 5 minutes, Then aged at room temperature for 24 hours, centrifuged at 6000r / min for 15 minutes, and then vacuum dried at 50°C for 15 hours to obtain ZI...

Embodiment 3

[0067] The molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium-ion battery negative electrode material of this embodiment includes an inner core and a shell covering the surface of the inner core, wherein the inner core is a nitrogen-doped carbon dodecahedral nucleus, and the outer shell is MoSe 2 Nanosheets.

[0068] The preparation method of molybdenum diselenide@nitrogen-doped carbon dodecahedral nucleus sodium ion battery negative electrode material in this embodiment comprises the following steps:

[0069] 1) Preparation of ZIF-8 precursor with dodecahedral structure:

[0070] Dissolve 175 mg of zinc acetate in 100 mL of methanol to obtain solution A; dissolve 263 mg of 2-methylimidazole in 50 mL of methanol to obtain solution B; then slowly pour solution B into solution A, and stir magnetically for 8 minutes. Then aged at room temperature for 18 hours, centrifuged at 7000r / min for 12 minutes, and vacuum dried at 70°C for 15 hours to obtain ZIF-8 whi...

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Abstract

The invention relate to a molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material, a preparation method thereof and a sodium ion battery, and belongs to the technical field of a new energy material. The molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material comprises a core and a shell, wherein the shell is coated on a surface of the core, the core is a nitrogen-doped carbon dodecahedronal nuclear body, and the shell is a molybdenum diselenide nanosheet. The molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material has a unique core-shell structure, the nitrogen-doped carbon dodecahedronal nuclear bodyis used for providing an enough space for sodium ion storage and electron transmission, so that the advantages of relatively high reversible capacity, high stability, long cycle lifetime and the like, and the molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material is a favorable sodium ion battery negative electrode material and haslong-term development prospect. The molybdenum diselenide@ nitrogen-doped carbon dodecahedronal nuclear-body sodium ion battery negative electrode material has the advantages of low cost, no toxicity,no pollution and the like.

Description

technical field [0001] The invention relates to a molybdenum diselenide@nitrogen-doped carbon dodecahedron sodium ion battery negative electrode material and a preparation method thereof, and a sodium ion battery, belonging to the technical field of new energy materials. Background technique [0002] With the sharp increase of fossil fuel consumption and environmental pollution, the development of renewable, safe, clean, efficient, and sustainable energy sources and related energy storage technologies has become a hot topic. Electrochemical energy storage technology has the advantages of environmental friendliness, high efficiency, and wide application range, which has attracted the attention of researchers. Among them, lithium-ion batteries have been widely used in smart phones, computers, cameras, new energy vehicles and other fields due to their high energy density and working voltage, long cycle life and low self-discharge rate. However, the growing lithium-ion battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/58H01M10/054B82Y30/00
CPCY02E60/10
Inventor 黄克靖谢星辰
Owner XINYANG NORMAL UNIVERSITY
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