Controllable synthesis and energy storage application of a cake-like sulfur-based compound composite

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

Active Publication Date: 2022-06-17
WUHAN TEXTILE UNIV
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  • Abstract
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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 35mAh / g, which is far from meeting the demand. Therefore, high-performance two The development of electrode materials has become the focus of current research

Method used

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  • Controllable synthesis and energy storage application of a cake-like sulfur-based compound composite
  • Controllable synthesis and energy storage application of a cake-like sulfur-based compound composite
  • Controllable synthesis and energy storage application of a cake-like sulfur-based compound composite

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Embodiment 1

[0032] (1) the ferric chloride of 2mmol is dissolved in the high-purity water of 35mL, the nucleating agent 2mmol is also dissolved in the high-purity water of 35mL, the solution of iron salt is added drop by drop to the solution containing the nucleating agent subsequently, stir, Then, the cake-like Fe was obtained by hydrothermal reaction at 180 °C for 12 h. 2 O 3 Precursor;

[0033] (2) the cake-like Fe obtained in step (1) 2 O 3 The precursor is placed in a Tris buffer solution of pH=10, then dopamine hydrochloride is added, and the mass ratio of the precursor and dopamine hydrochloride is 2:1 reagent, and the reaction is carried out at room temperature, and the obtained black solid is washed and dried to obtain Fe 2 O 3 / polydopamine intermediate;

[0034] (3) Fe of step (2) gained 2 O 3 / The polydopamine intermediate is placed at one end of the porcelain boat, and the sulfur source is placed at the other end of the porcelain boat, wherein the sulfur source and Fe...

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Abstract

The invention belongs to the field of battery energy storage and discloses Fe 0.975 Preparation methods and applications of S@NSC composites. Slowly mix iron salt and nucleating agent in aqueous solution, and hydrothermally treat at 150-200°C to obtain cake-like Fe 2 o 3 Precursor; after interface modification and high-temperature solid-state vulcanization treatment, Fe 0.975 S@NSC composites. The preparation method of the present invention is simple, with low cost, and the prepared Fe 0.975 S@NSC composites are structurally stable. Will Fe 0.975 When S@NSC composites are used as anode materials for lithium-ion batteries and sodium-ion batteries, respectively, they have excellent lithium / sodium storage capacity, reaction reversibility and rate performance, and Fe 0.975 The lithium and sodium storage performance of S@NSC composites is superior to other electrode materials with Fe and S ratios.

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, human beings have an increasing demand for energy. 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 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 e...

Claims

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Application Information

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Patent Type & Authority Patents(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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