Chinese fir chip-based supercapacitor electrode, preparation method and supercapacitor

A technology of supercapacitors and capacitors, applied in the field of capacitors, to achieve the effects of excellent overall performance, high specific capacitance and high energy density

Active Publication Date: 2019-01-11
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there have been no reports of using wood-base

Method used

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  • Chinese fir chip-based supercapacitor electrode, preparation method and supercapacitor
  • Chinese fir chip-based supercapacitor electrode, preparation method and supercapacitor
  • Chinese fir chip-based supercapacitor electrode, preparation method and supercapacitor

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Example Embodiment

[0053] Example 1

[0054] In this embodiment, the method for preparing a supercapacitor electrode based on cedar slices includes the following steps:

[0055] 1) The natural fir wood is air-dried until the moisture content is lower than 30%, and the slices of 3mm×20mm×40mm are cross-cut to obtain the cedar pieces. In this example, natural fir was purchased from Shaodong County, Hunan Province, China.

[0056] 2) Carbonization: Place the cedar pieces of step 1) in a 250°C blast drying furnace for pre-carbonization for 6 hours, then transfer the cedar pieces to a tube furnace at 1000°C, and perform carbonization for 10 hours under argon protection Process to obtain OWC flakes.

[0057] 3) The OWC sheet is passed with 100 standard cubic centimeters of CO per minute 2 In air, activate at a temperature of 750 degrees Celsius for 10 hours, and then polish the activated cedar sheet into a sheet with a thickness of 0.8 mm. Polishing is performed with fine sandpaper of 2000 mesh. figure 1 Fo...

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Abstract

A Chinese fir-based electrode material for supercapacitor is prepared from carbonized chip Chinese fir through activation treatment including CO2 activation, wherein the CO2 activation treatment comprises CO2 activation in CO2 flowing atmosphere at 650 DEG C-850 DEG C for 8-12 hours, the activated chips are polished to a thickness of 0.4-1.2 mm sheet. CO2, alkali and acid are sequentially activated to carbonize that cross-cut Chinese fir slices. Through a series of activation treatments, carbon wood chips have more micro-and nano-pores, and their specific surface area is increased to 613.2 m2g-1. By using these wafers as electrodes, symmetrical supercapacitors with excellent comprehensive performance, high specific capacitance and high energy density are fabricated.

Description

technical field [0001] The invention relates to a capacitor, in particular to a supercapacitor electrode based on carbonized fir chips, a preparation method and a supercapacitor. Background technique [0002] Supercapacitors (SCs) have attracted extensive attention as a novel green energy storage device. A series of novel electrode materials for SCs have been developed, such as carbonaceous electrodes, metal oxides, and transition metal sulfides. Recent studies have shown that the microstructure of electrode materials has an important impact on the comprehensive performance of SCs. To obtain effective electrode materials, nanomaterials with various microscopic features, such as nanoflowers, nanorods, and core-shell structures, have been synthesized. Recent findings suggest that electrode materials with uniformly arranged microchannels are more suitable for energy storage devices. Structural materials can enable fast charge separation and transport and effectively improve ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/44
CPCH01G11/24H01G11/44Y02E60/13
Inventor 罗勇锋吴陈灵张森周璀吴维习赵维黄展鹏
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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