Preparation method and application of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos

A technology of hydrothermal carbonization and carbon microspheres, applied in chemical instruments and methods, carbon compounds, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as promotion, unfavorable electrochemical performance of materials, and destruction of special morphology, and achieve Improve dispersibility and fluidity, benefit large-scale industrial production, and have suitable pore size distribution

Active Publication Date: 2021-01-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above strategies ignore another advantage of HTC over pyrolysis pretreatment, that is, the addition of catalysts and dopants in the HTC process can complete the morphology control and element doping of hydrothermal carbon in one step, which may be the key to improving the porosity. Another effective approach to the electrochemical performance of carbon electrode materials
At the same time, the highly corrosive KOH used in the preparation method tends to destroy the special morphology of the hydrothermal carbon formed in the HTC process, which is not conducive to the improvement of the electrochemical performance of the material

Method used

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  • Preparation method and application of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos
  • Preparation method and application of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos
  • Preparation method and application of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos

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Effect test

Embodiment 1

[0037] Raw bamboos were pulverized by a turbine grinder, passed through a 40-mesh standard sieve, and then dried in a blast drying oven at 105°C for 12 hours. Get 6g pulverized moso bamboo raw material and 0.6g Fe 2 (SO 4 ) 3 Add it into 60ml of ultrapure water, mix it evenly by ultrasonication for 15min at room temperature, then seal it in a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and place it in a muffle furnace at 180°C for 24h. Naturally cool to room temperature after the reaction is completed, filter with suction, wash with absolute ethanol and ultrapure water to remove impurities, and dry at 105°C for 12 hours to obtain iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon. The iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon and potassium bicarbonate were mixed at a mass ratio of 1:6 and then fully ground in a mortar. The obtained mixture was placed in a tube furnace, and the temperat...

Embodiment 2

[0039] Raw bamboos were pulverized by a turbine grinder, passed through a 40-mesh standard sieve, and then dried in a blast drying oven at 105°C for 12 hours. Get 6g pulverized moso bamboo raw material and 1.2g Fe 2 (SO 4 ) 3 Add it into 60ml of ultrapure water, mix it evenly by ultrasonication for 15min at room temperature, then seal it in a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and place it in a muffle furnace at 200°C for 24h. Naturally cool to room temperature after the reaction is completed, filter with suction, wash with absolute ethanol and ultrapure water to remove impurities, and dry at 100°C for 12 hours to obtain iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon. The iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon and potassium bicarbonate were mixed at a mass ratio of 1:6 and then fully ground in a mortar. The obtained mixture was placed in a tube furnace, and the temperat...

Embodiment 3

[0041] Raw bamboos were pulverized by a turbine grinder, passed through an 80-mesh standard sieve, and then dried in a blast drying oven at 105°C for 12 hours. Get 6g pulverized moso bamboo raw material and 1.2g Fe 2 (SO 4 ) 3 Add it into 60ml of ultrapure water, mix it evenly by ultrasonication for 15min at room temperature, then seal it in a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and place it in a muffle furnace at 180°C for 24h. Naturally cool to room temperature after the reaction is completed, filter with suction, wash with absolute ethanol and ultrapure water to remove impurities, and dry at 105°C for 12 hours to obtain iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon. The iron-modified carbon microsphere / carbon nanosheet composite hydrothermal carbon and potassium bicarbonate were mixed at a mass ratio of 1:2 and then fully ground in a mortar. The obtained mixture was placed in a tube furnace, and the tempera...

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Abstract

The invention discloses a preparation method of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos. The preparation method comprises the following steps: firstly, crushing biomass raw material moso bamboos into powder, and carrying out screening and drying; secondly, uniformly mixing the crushed moso bamboo raw material, ferric sulfate and ultrapure water, carrying out hydrothermal treatment, naturally cooling to room temperature after the reaction is finished, carrying out suction filtration, washing with absolute ethyl alcohol and ultrapure water to remove impurities, and drying to obtain the iron-modified carbon microsphere/carbon nanosheet composite hydrothermal carbon; and mixing the composite hydrothermal carbon with an activating agent, fully grinding the mixture in a mortar, putting the powder into a tubular furnace, performing high-temperature activation in an inert gas atmosphere, naturally cooling toroom temperature, and performing acid washing, water washing and drying on the obtained material to obtain the iron-modified carbon microsphere/carbon nanosheet composite porous carbon for the supercapacitor. The iron-modified carbon microsphere/carbon nanosheet composite porous carbon prepared by the method has unique morphology, and has a wide application prospect in the fields of porous materials and supercapacitors.

Description

technical field [0001] The present invention relates to the preparation of biochar materials and the technical application field of new energy storage devices such as supercapacitors and batteries, in particular to a method for preparing iron-modified carbon microsphere / carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboo and its application. Background technique [0002] The increasing demand and consumption of fossil fuels by the growing global economy has caused serious damage to the ecological environment. Therefore, there is an urgent need to explore and design sustainable energy storage systems. Supercapacitors, as one of the powerful and advanced energy storage systems, are considered as a new generation of devices suitable for storing energy from sustainable resources (wind, hydro, solar). Compared with lithium-ion batteries, supercapacitors have fast charging / discharging kinetics, excellent cycle stability and high power dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/354H01G11/24H01G11/34H01G11/44H01G11/84
CPCC01B32/348C01B32/354H01G11/24H01G11/34H01G11/44H01G11/84Y02E60/13
Inventor 盛奎川徐增华张玺铭林宏建钱湘群
Owner ZHEJIANG UNIV
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