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Application of NiPS3 nanosheet in sodium ion battery and sodium ion battery

A sodium ion battery and nanosheet technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems affecting the insertion and extraction of sodium ions, and reduce the charge and discharge capacity, and achieve high rate performance, high electric capacity, and realization of The effect of fast charging and discharging

Inactive Publication Date: 2020-05-01
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fast charge and discharge (10Ag -1 ), its capacitance is only 383mAh g -1
This is mainly because the electrolyte used will form a thick solid electrolyte (SEI) film on the surface of the negative electrode material during the charge and discharge process. This SEI film will affect the insertion and extraction of sodium ions and reduce its charge and discharge capacity.

Method used

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  • Application of NiPS3 nanosheet in sodium ion battery and sodium ion battery
  • Application of NiPS3 nanosheet in sodium ion battery and sodium ion battery
  • Application of NiPS3 nanosheet in sodium ion battery and sodium ion battery

Examples

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Effect test

Embodiment 1

[0056] This embodiment provides a NiPS 3 The preparation method of the nanosheet includes the following steps:

[0057] (1) Immerse clean FTO glass (size 2cm×2cm) into 30mL 2.5mM Ni(NO 3 ) 2 ·6H 2 O and 5mM hexamethylenetetramine (HMT) mixed solution, and then placed in a 50mL PTFE reactor heated to 100 ℃ for 10 hours, after the reaction is over, take out the sample, wash and dry at 60 ℃ for use , Get Ni(OH) evenly distributed on the surface of FTO glass 2 Nanosheets;

[0058] (2) Ni(OH) grown on the surface of FTO glass 2 Nanosheets and red phosphorus / sulfur mixed powder are placed on the sealed ends of the two quartz sleeves, and Ni(OH) 2 Nanosheets are placed in the downstream heating zone (T2 temperature zone) of the dual temperature zone tube furnace, and the red phosphorus / sulfur mixed powder is placed in the upstream heating zone (T1 temperature zone), and the tube furnace system is vacuumed with a mechanical pump. Subsequently, high-purity argon gas 25sccm was introduced, a...

Embodiment 2

[0062] This embodiment provides a NiPS 3 The preparation method of the nanosheet includes the following steps:

[0063] (1) Immerse clean FTO glass in 30mL 2.5mM Ni(NO 3 ) 2 ·6H 2 O and 5mM hexamethylenetetramine (HMT) mixed solution, and then placed in a 50mL polytetrafluoroethylene reactor heated to 100 ℃ for 10 hours, after the reaction is over, take out the sample, wash and dry at 60 ℃ for use , Get Ni(OH) evenly distributed on the surface of FTO glass 2 Nanosheets;

[0064] (2) Ni(OH) grown on the surface of FTO glass 2 Nanosheets and red phosphorus / sulfur mixed powder are placed on the sealed ends of the two quartz sleeves, and Ni(OH) 2 Nanosheets are placed in the downstream heating zone (T2 temperature zone) of the dual temperature zone tube furnace, and the red phosphorus / sulfur mixed powder is placed in the upstream heating zone (T1 temperature zone), and the tube furnace system is vacuumed with a mechanical pump. Subsequently, 30 sccm of high-purity argon gas was introdu...

Embodiment 3

[0067] This embodiment provides a NiPS 3 The preparation method of the nanosheet includes the following steps:

[0068] (1) Immerse clean FTO glass in 30mL 2.5mM Ni(NO 3 ) 2 ·6H 2 O and 5mM hexamethylenetetramine (HMT) mixed solution, and then placed in a 50mL polytetrafluoroethylene reactor heated to 100 ℃ for 10 hours, after the reaction is over, take out the sample, wash and dry at 60 ℃ for use , Get Ni(OH) evenly distributed on the surface of FTO glass 2 Nanosheets;

[0069] (2) Ni(OH) grown on the surface of FTO glass 2 Nanosheets and red phosphorus / sulfur mixed powder are placed on the sealed ends of the two quartz sleeves, and Ni(OH) 2 Nanosheets are placed in the downstream heating zone (T2 temperature zone) of the dual temperature zone tube furnace, and the red phosphorus / sulfur mixed powder is placed in the upstream heating zone (T1 temperature zone), and the tube furnace system is vacuumed with a mechanical pump. Then, 30 sccm of high-purity argon gas was introduced, and...

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Abstract

The invention provides an application of a NiPS3 nanosheet in a sodium ion battery and the sodium ion battery. The NiPS3 nanosheet is used as a negative electrode material of the sodium ion battery orone of negative electrode materials, and diethylene glycol dimethyl ether for dissolving NaCF3SO3 is used as electrolyte. The method is characterized in that the high-quality NiPS3 nanosheet is applied to the sodium ion battery to be used as the negative electrode material, and meanwhile, the matched NaCF3SO3 / diethylene glycol dimethyl ether is used as the electrolyte, so formation of a thick SEIfilm in the charging and discharging process can be effectively inhibited, and the sodium ion battery with high electric capacity, high rate capability and quick charging and discharging can be obtained. The sodium ion battery provided can be a button battery, a soft package battery and the like, is green and safe, and has great advantages as a future large-scale energy storage material.

Description

Technical field [0001] The invention relates to the application field of nanomaterials, in particular to NiPS 3 The application of nanosheets in sodium ion batteries and sodium ion batteries. Background technique [0002] The development of energy storage technology is a necessary means to achieve efficient use of energy. Among them, electrochemical energy storage systems have received widespread attention for their high efficiency and convenience, and are also one of the current research hotspots in the scientific community. In recent years, secondary batteries (including lithium ion batteries, lithium sulfur batteries, etc.) have been expected to be used in large-scale energy storage applications. However, due to the uneven distribution of lithium resources and limited reserves, its high cost restricts its large-scale energy storage applications. This result has led to the development of other secondary batteries. Among them, sodium ion batteries have been extensively studied....

Claims

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Application Information

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IPC IPC(8): H01M4/58B82Y40/00B82Y30/00H01M10/054H01M10/056
CPCB82Y30/00B82Y40/00H01M4/5805H01M4/5815H01M10/054H01M2004/027Y02E60/10
Inventor 何军王枫梅
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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