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Controllable synthesis and energy storage application of cake-shaped sulfenyl compound composite material

A composite material and nucleating agent technology, applied in the fields of nanotechnology, electrochemical generators, electrical components, etc. for materials and surface science, can solve the problems of low voltage platform, high reversible capacity, inability to meet demand, etc. The effect of promoting improvement, low energy consumption, and low cost of synthesis

Active Publication Date: 2021-08-24
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The commercial lithium-ion battery anode material is graphite, which has high reversible capacity and low voltage platform. When it is used as a sodium-ion battery anode material, the theoretical specific capacity is only 35 mAh / g, which is far from meeting the demand. Therefore, high-performance The development of dual-purpose electrode materials has become the focus of current research

Method used

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  • Controllable synthesis and energy storage application of cake-shaped sulfenyl compound composite material
  • Controllable synthesis and energy storage application of cake-shaped sulfenyl compound composite material
  • Controllable synthesis and energy storage application of cake-shaped sulfenyl compound composite material

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Embodiment 1

[0032] (1) Dissolve 2 mmol of ferric chloride in 35 mL of high-purity water, and 2 mmol of nucleating agent in 35 mL of high-purity water, then add the iron salt solution drop by drop to the solution containing the nucleating agent , stirred evenly, followed by hydrothermal reaction at 180 °C for 12 h, and the cake-like Fe 2 o 3 Precursor;

[0033] (2) The cake-shaped Fe obtained in step (1) 2 o 3 The precursor is placed in a Tris buffer solution with pH=10, and then dopamine hydrochloride is added. The mass ratio of the precursor to dopamine hydrochloride is 2:1, and the reaction is carried out at room temperature. After washing and drying the obtained black solid, Fe 2 o 3 / Polydopamine intermediate;

[0034] (3) the Fe obtained in step (2) 2 o 3 / The polydopamine intermediate is placed in the acetic acid of the porcelain boat, and the sulfur source is placed on the other end of the porcelain boat, wherein the sulfur source and Fe 2 o 3 The mass ratio of polydop...

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Abstract

The invention belongs to the field of battery energy storage, and discloses a preparation method and application of a Fe0.975S(at)NSC composite material. The preparation method comprises the following steps: slowly mixing ferric salt and a nucleating agent in an aqueous solution, and carrying out hydrothermal treatment at 150-200 DEG C to obtain a cake-shaped Fe2O3 precursor; and performing interface modification and high-temperature solid-phase vulcanization treatment to obtain the Fe0. 975S-coated NSC composite material. The preparation method is simple and low in cost, and the prepared Fe0. 975S(at)NSC composite material is stable in structure. When the Fe0. 975S(at)NSC composite material is respectively used as a lithium ion battery negative electrode material and a sodium ion battery negative electrode material, the Fe0. 975S(at)NSC composite material has excellent lithium / sodium storage capacity, reaction reversibility and rate capability, and the lithium / sodium storage performance of the Fe0.975S(at)NSC composite material under low current density is superior to that of other electrode materials with Fe and S proportions.

Description

technical field [0001] The invention belongs to the field of battery energy storage, and in particular relates to a development method and application of a high-efficiency lithium / sodium storage negative electrode material. Background technique [0002] With the continuous growth of the world population and the rapid development of industrial production, the human demand for energy is increasing. However, traditional fossil fuels are non-renewable resources. Excessive exploitation and use will not only bring about a global energy crisis, but also seriously affect environmental quality. Therefore, the development and use of new renewable resources has become an urgent problem to be solved. Lithium-ion batteries and sodium-ion batteries, as efficient and clean energy sources, have received more and more attention in recent years. The performance of electrode materials determines the electrochemical performance of batteries. Therefore, the development of high-performance elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00B82Y40/00
CPCH01M4/366H01M4/5815H01M4/62H01M10/0525H01M10/054B82Y40/00B82Y30/00Y02E60/10
Inventor 秦艳敏张珊包海峰方正李晨
Owner WUHAN TEXTILE UNIV
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