喷雾热解制备落叶松基炭球及其电化学性能

doi:10.3969/j.issn.0253-2417.2019.02.002

Abstract

Abstract:

Larch-based carbon spheres (LCSs) were prepared via spray pyrolysis with larch sawdust as raw materials. Larch-based resin obtained by liquefied larch wood powder and formaldehyde was used as carbon precursor. The effects of different carbonization temperatures and mass fractions of larch-based resin on the particle size, pore structure, specific surface area and electrochemical properties of LCSs were investigated. The surface morphology, pore structure, crystal structure and graphitization degree of LCSs were characterized by SEM, TEM, N₂ adsorption-desorption, XRD and Raman. The electrochemical performance of the samples was investigated by electrochemical workstation. The results showed that the prepared LCSs were amorphous with regular spherical structures. The specific surface area of the LCSs3 fabricated at 900 ℃ was as high as 626.6 m²/g, with the pore volume 0.345 cm³/g. The specific capacitance was 309 F/g at current density of 0.2 A/g in 6 mol/L KOH electrolyte. When the current density increased to 5 A/g, its specific capacitance retention rate was 56%, indicating excellent rate performance.

Key words: carbon spheres, biomass, spray pyrolysis, supercapacitors

CLC Number:

TQ35

Yulong SONG,Wei LI,Zhou XU,Shouxin LIU. Synthesis and Electrochemical Properties of Larch-based Carbon Spheres via Spray Pyrolysis[J]. Chemistry and Industry of Forest Products, 2019, 39(2): 9-15.

Figures/Tables 7

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References 23

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样品 samples	炭化温度/℃ carbonization temp.	落叶松基树脂/% larch-based resin	S_BET/ (m²·g^-1)	S_micro/ (m²·g^-1)	V_total/ (cm³·g^-1)	V_micro/ (cm³·g^-1)
LCSs1	700	1	406.8	315.8	0.224	0.166
LCSs2	800	1	544.3	470.0	0.290	0.246
LCSs3	900	1	626.6	491.9	0.345	0.258
LCSs4	900	3	601.0	430.6	0.337	0.226
LCSs5	900	5	540.1	367.2	0.302	0.194

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Synthesis and Electrochemical Properties of Larch-based Carbon Spheres via Spray Pyrolysis

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