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Tin telluride-based electrode material and preparation method thereof, and lithium ion battery

An electrode material, tin telluride-based technology, applied in the field of lithium ion batteries, can solve the problems of agglomeration, expansion and pulverization, insufficient conductivity of telluride electrode materials, etc., and achieve improved interface, low cost, and good electrochemical stability. Effect

Inactive Publication Date: 2021-01-15
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the object of the present invention is to provide a tin telluride-based electrode material and its preparation method and a lithium ion battery, aiming at solving the problems of insufficient electrical conductivity of the existing telluride electrode materials, agglomeration during cycling, Swelling and Pulverization Problems

Method used

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  • Tin telluride-based electrode material and preparation method thereof, and lithium ion battery
  • Tin telluride-based electrode material and preparation method thereof, and lithium ion battery
  • Tin telluride-based electrode material and preparation method thereof, and lithium ion battery

Examples

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Effect test

Embodiment 1

[0046] Take a certain quality of raw materials, and take a certain amount of ball milling beads. The mass of block SnTe is 1.0g, the quality of graphite is 0.8g, and the quality of multi-walled carbon nanotubes is 0.2g. The mass ratio is 1:30, under the protection of argon atmosphere, the ball milling speed is 500rpm, and the ball milling time is 15h, and then the SnTe-CNT-G electrode material is obtained. The structure of the electrode material prepared in this embodiment is shown in Figure 1 ~ Figure 2The composition and properties of electrode materials are shown in Figure 3 ~ Figure 4 As shown, the performance comparison chart of electrode materials is shown in Figure 5a , Figure 5b and Figure 5c shown.

Embodiment 2

[0048] Weigh a certain quality of raw materials, and weigh a certain amount of ball milling beads. The mass of bulk SnTe is 1.0g, the mass of graphite is 1.0g, and the mass of multi-walled carbon nanotubes is 0g. The ratio is 1:20, under the protection of nitrogen atmosphere, the ball milling speed is 600rpm, the ball milling time is 10h, and then the SnTe-CNT-G electrode material is obtained.

Embodiment 3

[0050] Take a certain quality of raw materials, and take a certain amount of ball milling beads. The mass of block SnTe is 1.2g, the quality of graphite is 0.6g, and the quality of multi-walled carbon nanotubes is 0.2g. The mass ratio is 1:40, under the protection of nitrogen atmosphere, the ball milling speed is 450rpm, and the ball milling time is 15h, and then the SnTe-CNT-G electrode material is obtained.

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Abstract

The invention discloses a tin telluride-based electrode material and a preparation method thereof, and a lithium ion battery. The preparation method of the electrode material comprises the following steps: taking blocky tin telluride, graphite and carbon nanotubes as raw materials, mixing the raw materials in a ball-milling tank, and then adding ball-milling beads; and then carrying out ball milling in a protective atmosphere to obtain an electrode material. An SnTe-CNT-G electrode material is prepared through a simple ball milling method, the structure of the material is anchored on a three-dimensional layered carbon frame through superfine SnTe nanosheets with few layers, and the material has high conductivity, good electrochemical oxidation-reduction activity and excellent electrochemical stability and is an excellent lithium ion battery negative electrode material. Structural advantages enable the performance advantages of tin telluride to be greatly shown, good cycling stability is shown, meanwhile, the conductivity of the material is greatly improved through introduction of a carbon frame, and reaction kinetics is promoted.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a tin telluride-based electrode material, a preparation method thereof, and a lithium ion battery. Background technique [0002] The development of rechargeable batteries with high capacity density is key to meet the ever-increasing demands of energy systems. Despite the commercial success of Li-ion batteries in the portable electronics market, the application of Li-ion batteries is still limited in many fields due to the low theoretical capacity of commercial graphite anodes. Therefore, there is an urgent need to develop new anode materials with high energy density and long cycle life. [0003] The topological insulator SnTe has a narrow bandgap (0.18eV) and shows promising applications in various electronic devices. In addition, the element Te has the largest metallic character (2×10 -4 mS·m -1 ), making SnTe extremely conductive. In addition, SnTe has a typi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M4/04H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/04H01M4/581H01M4/625H01M10/0525Y02E60/10
Inventor 任祥忠陈焕辉李永亮孙灵娜邓立波张黔玲米宏伟
Owner SHENZHEN UNIV
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