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Preparation method of nitrogen-doped carbon nanosphere/molybdenum disulfide sodium ion battery negative electrode plate

A sodium ion battery, molybdenum disulfide technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unsatisfactory rate performance, poor conductivity, weak interlayer force, etc., to achieve the benefits of commercial production and Application, improvement of cycle stability, and the effect of simple preparation method

Inactive Publication Date: 2017-10-03
QINGDAO HAICHENG INTPROP SERVICES CO LTD
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Problems solved by technology

Two-dimensional transition metal sulfide has the characteristics of low cost and high theoretical specific capacity, and has become a research hotspot of anode materials for sodium batteries; Reversible electrochemical deintercalation; among them, molybdenum disulfide is a typical two-dimensional transition metal sulfide, which has the advantage of high theoretical capacity, but its poor conductivity leads to unsatisfactory rate performance

Method used

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  • Preparation method of nitrogen-doped carbon nanosphere/molybdenum disulfide sodium ion battery negative electrode plate
  • Preparation method of nitrogen-doped carbon nanosphere/molybdenum disulfide sodium ion battery negative electrode plate
  • Preparation method of nitrogen-doped carbon nanosphere/molybdenum disulfide sodium ion battery negative electrode plate

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Embodiment 1

[0018] The preparation process of the nitrogen-doped carbon nanosphere / molybdenum disulfide sodium ion battery negative electrode sheet involved in this embodiment specifically includes:

[0019] (1) Break open the selected cuttlefish sac and take out the black liquid from it, then add it to ultrapure water for centrifugation and washing for 2-10 times, then put the centrifuged melanin into a dialysis bag for dialysis purification, and then purify The final melanin is freeze-dried to powder to obtain natural melanin powder for subsequent use;

[0020] (2) Disperse the natural melanin powder into ultrapure water with a weight ratio of 25-35 times according to the weight ratio, and prepare a uniformly dispersed natural melanin aqueous solution after ultrasonication for 10 minutes;

[0021] (3) Take sodium molybdate and thioacetamide according to the weight ratio and add them to ultrapure water with a weight ratio of 20-30 times, carry out ultrasonic dispersion for 10-60 minutes,...

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Abstract

The invention belongs to the technical field of battery preparation, relates to a preparation method of a sodium ion battery negative electrode plate, and particularly relates to a preparation method of a nitrogen-doped carbon nanosphere / molybdenum disulfide sodium ion battery negative electrode plate. Natural melanin nanospheres are coated with a layer of graphene-like transitional metal molybdenum disulfide to prepare the nitrogen-doped carbon sphere / molybdenum disulfide material and to prepare a battery; the preparation method is simple and easy, green and environment-friendly, and effective; according to the preparation method, melanin is extracted from natural squid ink, and the melanin is coated with molybdenum disulfide through a hydrothermal method; the main component of the melanin is polydopamine, so that the nitrogen-doped carbon spheres are formed in the hydrothermal process; the carbon nanospheres are uniformly coated with the molybdenum disulfide nanosheets, and a load network is formed among the nanosheets, so that an effect of high conductive network is played; and when the prepared CS / MoS<2> material is used as the negative electrode material of the sodium ion battery, the negative electrode structure and interface stability are improved, and commercial production and application can be promoted.

Description

Technical field: [0001] The invention belongs to the technical field of battery preparation, and relates to a method for preparing a negative electrode sheet of a sodium ion battery, in particular to a method for preparing a negative electrode sheet of a nitrogen-doped carbon nanosphere / molybdenum disulfide sodium ion battery. Wrapped a layer of graphene-like transition metal molybdenum disulfide to prepare nitrogen-doped carbon spheres / molybdenum disulfide (MoS 2 )(carbon spheres,CS)(CS / MoS 2 ) materials, and prepared into batteries. Background technique: [0002] Sodium-ion batteries have been considered as an ideal substitute for lithium-ion batteries due to their abundant sources, simple preparation process, no pollution, low price, and wide distribution in nature. At present, the anode materials for sodium-ion batteries that have been studied more are mainly various carbon-based materials, such as graphite, mesocarbon microspheres, hard carbon, etc. The electrochemica...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/054
CPCH01M4/366H01M4/5815H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 石云鹏马文静蔡冬迟庆东
Owner QINGDAO HAICHENG INTPROP SERVICES CO LTD
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