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a kind of sns 2 Preparation method of /cnts composite nanomaterial and its application as anode material for sodium ion battery

A technology of composite nanomaterials and sodium-ion batteries, applied in battery electrodes, nanocarbons, carbon nanotubes, etc., can solve problems such as low conductivity, limited application, large volume change, etc., and achieve high yield, high reversible capacity, The effect of mild reaction conditions

Active Publication Date: 2019-12-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, during the cyclic deintercalation of sodium ions, a single SnS 2 It will produce a large volume change (about 420%) and its own low conductivity, which limits its application as a negative electrode material for sodium-ion batteries

Method used

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  • a kind of sns <sub>2</sub> Preparation method of /cnts composite nanomaterial and its application as anode material for sodium ion battery
  • a kind of sns <sub>2</sub> Preparation method of /cnts composite nanomaterial and its application as anode material for sodium ion battery
  • a kind of sns <sub>2</sub> Preparation method of /cnts composite nanomaterial and its application as anode material for sodium ion battery

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Embodiment 1

[0032] (1) Add 50 mg of carbon nanotubes to 50 mL of ultrapure water, and sonicate for 3 h;

[0033] (2) Add 7mL of SnCl to the dispersion system of step (1) 4 ·5H 2 O solution (with solute mass concentration being 36% hydrochloric acid as solvent, SnCl in solution 4 ·5H 2 O concentration is 0.2mol / L), after magnetic stirring 30min, add the thiourea of ​​2.8mmol again, and magnetic stirring 30min again;

[0034] (3) The mixed system obtained in step (2) was subjected to a hydrothermal reaction at 180°C for 700min, and after the reaction, it was naturally cooled to room temperature, filtered with suction, washed with water for 3 times, and dried in a vacuum drying oven at 60°C for 6h to obtain SnS 2 / CNTs composite nanomaterials;

[0035] The above SnS 2 / CNTs composite nanomaterials for the preparation of negative electrodes for sodium-ion batteries:

[0036] According to SnS 2 / CNTs composite nanomaterials: super carbon: sodium alginate with a mass ratio of 80:10:10, t...

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Abstract

The invention belongs to the technical field of a novel secondary battery negative electrode material and preparation thereof and particularly relates to a preparation method of a SnS2 / CNTs composite nano material and application of the SnS2 / CNTs composite nano material to a sodium ion battery negative electrode material. The preparation method comprises the following steps: firstly, adding carbon nanotubes into ultrapure water and carrying out ultrasonic treatment; adding a SnCl4*5H2O solution and thiourea; then carrying out a hydrothermal reaction to obtain the SnS2 / CNTs composite nano material. When the composite material is used as the sodium ion battery negative electrode material, good conductive capability and reversible capacity are represented and a good application prospect of utilizing SnS2 / CNTs as the sodium ion battery negative electrode material is shown.

Description

technical field [0001] The invention belongs to the technical field of novel secondary battery negative electrode materials and their preparation, and in particular relates to a SnS 2 Preparation method of / CNTs composite nanomaterial and its application as anode material for sodium ion battery. Background technique [0002] Sodium-ion batteries, as an excellent energy storage device, have been considered as an ideal substitute for lithium-ion batteries due to their abundant sources, simple preparation process, pollution-free and excellent electrochemical performance. Similar to lithium-ion batteries, sodium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, and electrolytes. Its working principle is realized by the continuous deintercalation of sodium ions between positive and negative electrode materials. [0003] Compared with lithium ions, the radius of sodium ions is much larger, so conventional lithium-ion battery anode ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/054C01B32/158
CPCH01M4/362H01M4/5815H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 任玉荣王佳伟丁建宁
Owner CHANGZHOU UNIV
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