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Preparation method and application of bowl-like nitrogen-doped carbon hollow particle

A nitrogen-doped carbon, bowl-shaped technology is applied in the field of preparation of bowl-shaped nitrogen-doped carbon hollow particles, which can solve the problems of low success rate, large influence of environmental factors, high preparation cost, and achieve high capacity retention rate and stable cycle. performance, simple and feasible preparation method, high success rate and high conversion rate

Active Publication Date: 2016-05-04
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing preparation methods using hollow polystyrene spheres as templates include the synthesis of hollow polystyrene spheres, the volatilization of hollow polystyrene sphere aqueous solution and the redispersion of dry hollow particles in water, the operation is complicated and affected by environmental factors. High impact, low success rate
In addition, hollow polystyrene spheres are used as templates, so that the bowl-shaped yield of the bowl-shaped hollow structure obtained by volatilization of the aqueous solution is low, and the obtained bowl-shaped hollow particles only account for a small proportion, and the quality of the resulting product is low.
At the same time, the preparation method using hollow polystyrene spheres as a template is time-consuming, and the preparation cost is high due to low yield

Method used

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  • Preparation method and application of bowl-like nitrogen-doped carbon hollow particle
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  • Preparation method and application of bowl-like nitrogen-doped carbon hollow particle

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Embodiment 1

[0028] Embodiment 1 of the present invention provides a method for preparing bowl-shaped nitrogen-doped carbon hollow particles, including the following steps:

[0029] Step 1: Add deionized water (or ultrapure water) to 1-4ml dioxane solution in which 10-20mg of amphiphilic PS-b-PEO block copolymer is dissolved, and PS-b-PEO is embedded The segment copolymer self-assembles to form vesicles in the dioxane solution. When the amount of deionized water added reaches the total mass of the solution (that is, the total mass of PS-b-PEO block copolymer + dioxane solution + deionized water) ), quickly add more than 10 times the amount of deionized water previously added to collapse the vesicles formed by the self-assembly of the PS-b-PEO block copolymer in the dioxane solution to obtain a bowl-shaped vesicle Vesicles, Kippah vesicles.

[0030] Step 2: Use the Kippah vesicles obtained in Step 1 as a template to support the polymerization of dopamine on PEO segments to obtain bowl-shaped po...

Embodiment 2

[0036] Embodiment 2 of the present invention provides a method for preparing bowl-shaped nitrogen-doped carbon hollow particles, including the following steps:

[0037] Step one, take 10~20mgPS 370 -B-PEO 114 The block copolymer was dissolved in 1 mL of dioxane solution. After magnetic stirring at room temperature for 1 hour, 1 mL of ultrapure water was added, and then 20 mL of ultrapure water was quickly added to obtain bowl-shaped vesicles, namely Kippah vesicles;

[0038] Step 2: Use the Kippah vesicles obtained in Step 1 as a template to support the polymerization of dopamine on PEO segments to obtain bowl-shaped polydopamine Kippah particles; specifically, add 20 mg of dopamine to the solution containing Kippah vesicles obtained in Step 1 to obtain The mixture was gently stirred at room temperature for 1h, and then 20mg of tris(hydroxymethylaminomethane) hydrochloride was added and reacted for 48h at room temperature to polymerize dopamine. The product obtained after polymeriza...

Embodiment 3

[0041] Embodiment 3 of the present invention provides a method for preparing bowl-shaped nitrogen-doped carbon hollow particles, including the following steps:

[0042] Step one, take 10~20mgPS 370 -B-PEO 114 The block copolymer was dissolved in 4 mL of dioxane solution, and after magnetic stirring at room temperature for 1 hour, 1 mL of ultrapure water was added, and then 20 mL of ultrapure water was quickly added to obtain bowl-shaped vesicles, namely Kippah vesicles;

[0043] Step 2: Use the Kippah vesicles obtained in Step 1 as a template to support the polymerization of dopamine on PEO segments to obtain bowl-shaped polydopamine Kippah particles; specifically, add 10 mg of dopamine to the solution containing Kippah vesicles obtained in Step 1, to obtain The mixture was gently stirred at room temperature for 2h, and then 20mg of tris(hydroxymethylaminomethane) hydrochloride was added and reacted for 48h at room temperature to polymerize dopamine. The product obtained after polym...

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Abstract

The invention discloses a preparation method of a bowl-like nitrogen-doped carbon hollow particle, comprising the following steps of forming a completely collapsed bowl-like vesicle through self assembling of an amphipathic PS-b-PEO segmented copolymer in solution; taking the bowl-like vesicle as a template to support dopamine to polymerize on a PEO chain segment, thereby obtaining a bowl-like polydopamine @Kippah vesicle particle; roasting the bowl-like polydopamine @Kippah vesicle particle with two steps in a nitrogen flow, and obtaining the bowl-like nitrogen-doped carbon hollow particle. The preparation method provided by the invention is simple, convenient and feasible, has high success rate and conversion rate, and can effectively reduce preparation cost. The invention also discloses an application of the bowl-like nitrogen-doped carbon hollow particle. According to the invention, the bowl-like nitrogen-doped carbon hollow particle is applied to super capacitors as an electrode material for the first time, and extremely high capacitance, good capacity retention ratio and outstanding cycling stability are realized.

Description

Technical field [0001] The invention relates to an electrode material applied to a supercapacitor, in particular to a preparation method and application of bowl-shaped nitrogen-doped carbon hollow particles. Background technique [0002] In recent years, supercapacitors have become an important energy storage device, and their performance is greatly restricted by the properties of electrode materials. In order to develop high-performance electrode materials, researchers are committed to preparing new carbon materials, including porous carbon, carbon balls, carbon fibers, carbon nanotubes, graphene, etc. Among them, the hollow structured carbon spheres have attracted much attention because of their hierarchical pore structure which greatly helps to improve the material properties. However, one of the main disadvantages of hollow structured carbon spheres is the low volume density caused by the cavity, resulting in low volume capacity in practical applications. In order to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/32H01G11/24
CPCY02E60/13H01G11/86H01G11/24H01G11/32
Inventor 麦亦勇朱姝妍林志兴田豪徐福贵杨祥文黄银娟冯新亮
Owner SHANGHAI JIAO TONG UNIV
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