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	Capacitance retention/%
K ₁	104.16	138.47	135.37	143.79	Σ/9=46.43
K ₂	144.95	155.65	161.55	152.31
K ₃	168.76	123.75	120.95	121.77
k ₁	34.72	46.16	45.12	47.93
k ₂	48.32	51.88	53.85	50.77
k ₃	56.25	41.25	40.32	40.59
Raw material	21.53	10.63	13.53	10.18

Table 5 Results of performance analysis for orthogonal experiment rate

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
Table 4 Results of capacitance analysis for orthogonal experiments
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
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）