Journal of Materials Engineering

Self-templated construction of sargassum- based activated carbon and its electrochemical properties

JING Penghu, LI Shijie, TAN Xiaopeng, LI Hui

Journal of Materials Engineering, 2025, 53(4): 194-202. DOI: 10.11868/j.issn.1001-4381.2023.000519

Sample	Impregnation ratio A	Impregnation time B/h	Activation temperature C/℃	Activation time D/h	Specific capacitance/（F·g^-1）
K ₁	126.60	250.60	157.40	185.40	Σ=578.40 Σ/9=64.27
K ₂	186.40	176.40	261.80	209.80
K ₃	265.40	151.40	159.20	183.20
k ₁	42.20	83.53	52.47	61.80
k ₂	62.13	58.80	87.27	69.93
k ₃	88.47	50.47	53.07	61.07
Raw material	46.27	33.07	34.80	8.87

Table 4 Results of capacitance analysis for orthogonal experiments

Other figure/table from this article

Table 1 Elemental and industrial analysis of sargassum （mass fraction/%）
Fig.1 Flowchart for the construction of “egg-box” structures by self-templates
Table 2 Orthogonal experiment parameters
Fig.2 Pore structure properties of sargassum-based activated carbon prepared at different impregnation ratios（a）isothermal adsorption curves；（b）pore size distribution curves
Fig.3 SEM images of activated carbon prepared from sargassum raw material and different impregnation ratios（a）sargassum raw material；（b）SAC₃；（c）SAC₅；（d）SAC₇
Fig.4 Structural characterization of activated carbon prepared with different impregnation ratios（a）EDS spectra；（b）FT-IR spectra；（c）XRD spectra
Table 3 Electrochemical test results
Fig.5 GCD curves at 0.5 A/g of sargassum-based activated carbon with different experiment parameters（a）different impregnation ratios；（b）different activation temperatures
Table 5 Results of performance analysis for orthogonal experiment rate
Fig.6 Rate performance of sargassum-based activated carbon（a） and GCD of SAC₇ at different current densities（b）
Fig.7 CV curves under 50 mV/s of sargassum-based activated carbon prepared with different impregnation ratios（a） and different activation temperatures（b）， CV curves of activated carbon SAC₇（c）， and cycling performance of sargassum-based activated carbon at 5 A/g（d）