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Preparation of antimony pentoxide/silicon dioxide/carbon cloth flexible material and application thereof as negative electrode of sodium-ion battery

A technology of antimony pentoxide and sodium ion battery, which is applied in the direction of antimony oxide/antimony hydroxide/antimony oxyacid, silicon dioxide, carbon preparation/purification, etc. It can solve the problems of inappropriateness and achieve low cost, Effects of improved cycle performance and high electrochemical cycle stability

Active Publication Date: 2019-12-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicon materials are generally considered unsuitable as anode materials for sodium-ion batteries, so there are few reports on the application of silicon dioxide to anodes for sodium-ion batteries.

Method used

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  • Preparation of antimony pentoxide/silicon dioxide/carbon cloth flexible material and application thereof as negative electrode of sodium-ion battery
  • Preparation of antimony pentoxide/silicon dioxide/carbon cloth flexible material and application thereof as negative electrode of sodium-ion battery
  • Preparation of antimony pentoxide/silicon dioxide/carbon cloth flexible material and application thereof as negative electrode of sodium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of a kind of antimony pentoxide / silicon dioxide / carbon cloth flexible material comprises the following steps:

[0030] Step 1: Grind 0.038g of silica particles and add them into 20ml of deionized water for ultrasonic treatment for 1h and dissolve to obtain solution A;

[0031] Step 2: Add 0.57g antimony trichloride to 20mL ethanol solution and dissolve to obtain antimony trichloride solution, add 0.06g / mL sodium hydroxide aqueous solution to the antimony trichloride solution to adjust its pH to 8 to obtain a solution B;

[0032] Step 3: Add solution A to solution B and magnetically stir for 30 minutes to obtain solution C;

[0033] Step 4: Put the activated carbon after anodic oxidation for 15 minutes in 20 g / L sodium dihydrogen phosphate aqueous solution at an electrolysis voltage of 3 V for 30 minutes in solution C, transfer solution C and carbon cloth to a polytetrafluoroethylene kettle and Put it in a homogeneous reactor for hydrothermal reaction a...

Embodiment 2

[0038] The preparation of a kind of antimony pentoxide / silicon dioxide / carbon cloth flexible material comprises the following steps:

[0039] Step 1: Grind 0.075g of silica particles and add them into 15ml of deionized water for ultrasonic treatment for 1h and dissolve to obtain solution A;

[0040] Step 2: Add 0.3g antimony trichloride to 20mL ethanol solution and dissolve to obtain antimony trichloride solution, add 0.06g / mL sodium hydroxide aqueous solution to the antimony trichloride solution to adjust its pH to 12 to obtain a solution B;

[0041] Step 3: Add solution A to solution B and magnetically stir for 20 minutes to obtain solution C;

[0042] Step 4: In 20g / L sodium dihydrogen phosphate aqueous solution, the activated carbon arrangement was anodized for 8 minutes at an electrolytic voltage of 6V and then immersed in solution C for 60 minutes, and then transferred solution C and carbon cloth to a polytetrafluoroethylene kettle Put it in a homogeneous reactor for h...

Embodiment 3

[0045] The preparation of a kind of antimony pentoxide / silicon dioxide / carbon cloth flexible material comprises the following steps:

[0046] Step 1: Grind 0.15g of silica particles and add them into 25ml of deionized water for ultrasonic treatment for 2h and dissolve to obtain solution A;

[0047] Step 2: Add 1.1 g of antimony trichloride to 40 mL of ethanol solution and dissolve to obtain an antimony trichloride solution, add 0.06 g / mL sodium hydroxide aqueous solution to the antimony trichloride solution to adjust its pH to 9, and obtain a solution B;

[0048] Step 3: Add solution A to solution B and magnetically stir for 60 minutes to obtain solution C;

[0049] Step 4: In 20g / L sodium dihydrogen phosphate aqueous solution, the activated carbon arrangement was anodized for 2 minutes at an electrolytic voltage of 8V and then immersed in solution C for 30 minutes, and then transferred solution C and carbon cloth to a polytetrafluoroethylene kettle Put it in a homogeneous r...

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Abstract

The invention discloses preparation of an antimony pentoxide / silicon dioxide / carbon cloth flexible material and an application thereof as a negative electrode of a sodium-ion battery, which comprisesthe following steps: grinding silicon dioxide, adding the silicon dioxide into deionized water for dissolution to obtain a solution A; adding antimony trichloride into the ethanol solution for dissolution to obtain an antimony trichloride solution, and adding a sodium hydroxide aqueous solution into the antimony trichloride solution to adjust the pH value of the antimony trichloride solution to obtain a solution B; adding the solution A into the solution B and stirring to obtain a solution C; impregnating the activated carbon cloth in the solution C, transferring the solution C and the carboncloth into a reaction kettle for hydrothermal reaction, cooling the carbon cloth to room temperature, moving out the carbon cloth, and cleaning and drying the carbon cloth to obtain the antimony pentoxide / silicon dioxide / carbon cloth flexible sodium ion battery negative electrode material. The method is simple to operate and low in cost, and the silicon material can be applied to the negative electrode material of the sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and relates to the preparation of an antimony pentoxide / silicon dioxide / carbon cloth flexible material and its application as a negative electrode of a sodium ion battery. Background technique [0002] Metal oxides, as relatively common and inexpensive materials, have been extensively studied due to their high theoretical capacities. Metal oxides undergo conversion reactions and alloying reactions during battery charging and discharging. However, severe volume expansion will occur in the process of repeated sodium deintercalation, which will lead to severe capacity fading and affect the cycle stability of the battery. This is also a major problem in overcoming oxides as electrode materials. For this reason, researchers have designed various solutions, such as compounding with carbon materials, designing clad structures and core-shell structures, etc., in an attempt to solve this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00C01B33/12C01B32/05H01M4/48H01M4/62H01M10/054
CPCC01G30/005C01B33/12C01B32/05H01M4/483H01M4/62H01M4/625H01M10/054C01P2002/72C01P2004/03C01P2006/40Y02E60/10
Inventor 费杰王娜黄剑锋曹丽云许占位李嘉胤郑欣慧李盟
Owner SHAANXI UNIV OF SCI & TECH
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