碳酸钾活化一步法制备高比表活性炭及其电容性能的研究

doi:10.19964/j.issn.1006-4990.2021-0383

Abstract

Abstract:

Waste tobacco was used as the carbon source to prepare tobacco-based porous carbon in one step with K₂CO₃ as the activator.Scanning electron microscope（SEM）,X-ray diffraction（XRD）,N₂ adsorption-desorption analysis（BET）,Raman spectroscopy（Raman） and other methods were applied to characterize the porous material.The results showed that the surface of the material contained heteroatom groups such as ether groups and carboxyl groups,and it had a rich pore structure with a specific surface area of up to 2 058 m²/g.The electrochemical performance results in the three-electrode system showed that when the mass ratio of K₂CO₃ to waste tobacco was 3∶1,it had the best electrical storage performance,and its specific capacitance could reach 337 F/g at 1 A/g.It could be charged and discharged for 2 000 times at 10 A/g.The capacitance still retained 97.3% of the initial capacitance,with good rate performance and cycle stability.

Key words: waste tobacco, K₂CO₃, porous carbon, supercapacitor

CLC Number:

TQ131.13

Zhang Tianliang,Li Jun,Xiong Wei,Zhang Haiyan,Tao Xiaoqiu. Study on one-step preparation of activated carbon with high specific surface by K₂CO₃ activation and its capacitance performance[J]. Inorganic Chemicals Industry, 2022, 54(4): 159-164.

Figures/Tables 7

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References 17

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样品	S_BET/ （m²·g^-1）	V_total/ （cm³·g^-1）	V_micro/ （cm³·g^-1）	V_meso/ （cm³·g^-1）	平均孔径/nm
YC-0	125.176 2	0.168 74	0.056 006	0.121 203	2.70
YC-3	2 058.421 4	1.203 89	0.865 176	0.362 665	1.17

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on one-step preparation of activated carbon with high specific surface by K₂CO₃ activation and its capacitance performance

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Study on one-step preparation of activated carbon with high specific surface by K2CO3 activation and its capacitance performance