Preparation method and application of a sn-snsb/carbon nanosheet composite material

A technology of composite materials and carbon nanosheets, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as large difficulties and uncontrollable growth of two-phase materials, and achieve low cost, good industrialization prospects, and improved electrochemistry. performance effect
CN109728263BActive Publication Date: 2022-04-05YANCHENG INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANCHENG INST OF TECH
Publication Date
2022-04-05

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Abstract

The invention discloses a preparation method and application of a Sn-SnSb / carbon nano sheet composite material. First, configure ethanol-water solution, and add urea or cyanoamine, tin antimony oxide, and glycogen in sequence in the ethanol-water solution, and ultrasonic dispersion is required for each addition; secondly, the above-mentioned mixed solution is rotary evaporated to dryness, and then passed After vacuum drying, grind the precursor powder, and finally transfer the precursor powder into a tube furnace, and carry out high-temperature carbonization by temperature programming under an inert atmosphere, to obtain a highly dispersed Sn-SnSb / carbon nanosheet composite material; the The weight ratio of carbon in the Sn‑SnSb / carbon nanosheet composite is 15‑60%. By designing nano-Sn and its SnSb alloys to be uniformly dispersed on the surface of conductive carbon nanosheets to form a three-dimensional structure, the electrochemical performance of electrode materials is effectively improved. The raw materials are cheap, the preparation is simple, the yield is high, and it is convenient for industrial production.
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Description

technical field

[0001] The invention relates to the technical field of anode materials for sodium batteries, in particular to a preparation method and application of a Sn-SnSb / carbon nanosheet composite material. Background technique

[0002] Na-ion batteries have recently attracted great interest due to their low cost, abundant resources, and improved safety compared to lithium-ion batteries. However, because sodium ions have a larger ionic radius than lithium ions, resulting in lower specific capacity, lower rate capacity, and significant volume effect, the cycle life is shortened. For now, compared with lithium-ion batteries, there are still fewer electrode materials suitable for sodium-ion batteries, and the performance is not superior enough.

[0003] Sodium can form alloys with various metal elements such as tin, antimony, germanium, and lead, such as Na 15 sn 4 The alloy can reach a theoretical specific capacity of 847 mAh / g, Na 3 Sb can reach 660 mAh / g theoretica...

Claims

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