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TiO2-SnO2 composite material as well as preparation method and application thereof

A composite material and material layer technology, applied in the field of TiO2-SnO2 composite material and its preparation, can solve the problems of materials not tightly anchored, short cycle life, and unsatisfactory effect, so as to avoid lithium dendrites and improve Safety, the effect of slowing down the decline in capacity

Pending Publication Date: 2022-03-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The negative electrode material has excellent electrochemical performance, but the effect is not particularly ideal, the prepared Sn / SnO / SnO 2 The material cannot be tightly anchored on the nickel foam, resulting in excessive capacity decay and short cycle life

Method used

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  • TiO2-SnO2 composite material as well as preparation method and application thereof
  • TiO2-SnO2 composite material as well as preparation method and application thereof
  • TiO2-SnO2 composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of TiO 2 / Au / SnO 2 The preparation method of / Au composite material, comprises the following steps:

[0046] (1) Cleaning the titanium sheet: Cut the titanium sheet (99.99% pure) into 40*40*0.1mm, ultrasonically clean it with acetone, alcohol, and deionized water for a certain period of time, and dry it for later use.

[0047] (2) Preparation of electrolyte: take an aqueous solution of 2wt% HF, 2wt% H 2 O is obtained by mixing 96 wt% diethylene glycol.

[0048] (3) Anodic oxidation: use the titanium sheet cleaned above as the anode, the platinum sheet as the cathode, use the mixed solution in step (2) as the electrolyte, apply a DC voltage of 60V, and oxidize for 16 hours in the configured electrolyte, and then Continue to oxidize and oxidize for 16 hours in the electrolyte after primary oxidation to obtain TiO 2 Nanotube array, take the second oxidized TiO 2 Nanotube arrays are available.

[0049] (4) Magnetron sputtering: the pure TiO prepared in step (3) ...

Embodiment 2

[0053] A kind of TiO 2 / Ag / SnO 2 The preparation method of / Ag composite material, comprises the following steps:

[0054] (1) Cleaning the titanium sheet: Cut the titanium sheet (99.99% pure) into a certain specification, use acetone, alcohol, and deionized water to ultrasonically clean it for a certain period of time, and dry it for later use.

[0055] (2) Preparation of electrolyte: take an aqueous solution of 2wt% HF, 2wt% H 2 O is obtained by mixing 96 wt% diethylene glycol.

[0056] (3) Anodic oxidation: use the titanium sheet cleaned above as the anode, the platinum sheet as the cathode, use the mixed solution in step (2) as the electrolyte, apply a DC voltage of 60V, and oxidize for 16 hours in the configured electrolyte, and then Continue to oxidize and oxidize for 16 hours in the electrolyte after primary oxidation to obtain TiO 2 Nanotube array, take the second oxidized TiO 2 Nanotube arrays are available.

[0057] (4) Magnetron sputtering: the pure TiO prepare...

Embodiment 3

[0061] A kind of TiO 2 / Cu / SnO 2 The preparation method of / Cu composite material, comprises the following steps:

[0062] (1) Cleaning the titanium sheet: Cut the titanium sheet (99.99% pure) into a certain specification, use acetone, alcohol, and deionized water to ultrasonically clean it for a certain period of time, and dry it for later use.

[0063] (2) Preparation of electrolyte: take an aqueous solution of 2wt% HF, 2wt% H 2 O is obtained by mixing 96 wt% diethylene glycol.

[0064] (3) Anodic oxidation: use the titanium sheet cleaned above as the anode, the platinum sheet as the cathode, use the mixed solution in step (2) as the electrolyte, apply a DC voltage of 60V, and oxidize for 16 hours in the configured electrolyte, and then Continue to oxidize and oxidize for 16 hours in the electrolyte after primary oxidation to obtain TiO 2 Nanotube array, take the second oxidized TiO 2 Nanotube arrays are available.

[0065] (4) Magnetron sputtering: the pure TiO prepar...

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Abstract

The invention discloses a TiO2-SnO2 composite material as well as a preparation method and application thereof, and belongs to the technical field of lithium battery electrode materials. The TiO2-SnO2 composite material is of a layered structure and sequentially comprises a TiO2 nanotube array, a first high-conductivity layer, a SnO2 layer and a second high-conductivity layer from inside to outside. According to the preparation method disclosed by the invention, the structure of the TiO2-SnO2 composite material is reasonably designed, so that the volume change and pulverization of SnO2 in the charging and discharging processes are avoided, and the electrochemical performance of the TiO2-SnO2 composite material is improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery electrode materials, in particular to a TiO 2 -SnO 2 Composite materials and their preparation methods and applications. Background technique [0002] At present, commercial lithium-ion battery anode materials are mainly carbon materials represented by graphite, and the theoretical specific capacity of this type of anode material is 372mAh g -1 , it is difficult to meet people's needs. In order to further improve the energy density, capacity density and service life, people are devoting themselves to the development of new lithium-ion battery anode materials. [0003] Among them, SnO 2 The material is favored by people for its outstanding low lithium intercalation voltage and high lithium intercalation capacity, and its theoretical mass specific capacity is 1494mAh g -1 , which is 4 times that of graphite-based anode materials, is regarded as a new generation of lithium-ion battery an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/48H01M4/624H01M10/0525H01M2004/027Y02E60/10
Inventor 卫欢侯利锋杜华云卫英慧贾建文
Owner TAIYUAN UNIV OF TECH
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