Activated carbons from KOH and H3PO4-activation of olive residues and its application as supercapacitor electrodes

被引:227
作者
Elmouwahidi, Abdelhakim [1 ]
Bailon-Garcia, Esther [1 ]
Perez-Cadenas, Agustin F. [1 ]
Maldonado-Hodar, Francisco J. [1 ]
Carrasco-Marin, Francisco [1 ]
机构
[1] Univ Granada, Fac Sci, Dept Inorgan Chem, Res Grp Carbon Mat, Campus Fuente Nueva S-N, E-18071 Granada, Spain
关键词
Mixture of olive-residue oil and vegetable water; Activated carbons; KOH and H3PO4 activation; Supercapacitors; Energy storage; DOUBLE-LAYER CAPACITANCE; PORE-SIZE DISTRIBUTION; PHOSPHORIC-ACID; ELECTROCHEMICAL CAPACITORS; SURFACE-CHEMISTRY; NONAQUEOUS ELECTROLYTES; MESOPOROUS CARBONS; FUNCTIONAL-GROUPS; POROUS CARBON; ADSORPTION;
D O I
10.1016/j.electacta.2017.01.152
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Activated carbons from a mixture of olive-residue, oil and vegetable water, known as alperujo, OR, were prepared by KOH and H3PO4 activation. KOH activations were made following two different methods (carbonization-activation and impregnation-activation) with two different KOH/carbon ratios. Textural characterization with N-2 and CO2 reveals that a prior carbonization of samples followed by the activation with KOH, produces samples with similar textural and chemical properties to the impregnated ones at low KOH ratio, while at high KOH ratio; more porous samples are obtained by carbonization. However, no differences are observed increasing the KOH ratio for the impregnated samples. As a consequence, similar or even more porous samples are obtained by using an easier preparation method such as carbonization activation. On the other side, H3PO4 activation leads to samples with less surface area but with a more developed mesoporosity. In addition, the chemical surfaces of KOH and H3PO4 activated samples are very different as shown by XPS and TPD results. XPS data denote a similar chemical texture in KOH activated samples in spite of the different preparation methods and KOH ratio, Whereas the H3PO4 method fixed different phosphorus surface groups. Analysing TPD data while on KOH activated samples, oxygenated surface groups (OSG) decompose mainly as CO2 (carboxylic acid, anhydrides, lactones, etc.) during the TPD experiments, on H3PO4 activated one those OSG ones evolve as CO (semiquinone, carbonyl, etc.) which has been attributed to the presence of-C-O-P-species that decompose in the form of CO at around 860 degrees C. As a consequence, similar electrochemical capacitances are obtained using KOH activated samples, which depend linearly on the surface area while the H3PO4 activated one presents higher capacitance value and capacitance stability in spite of its smaller surface area. This fact was related with the presence and nature of phosphorus surface groups. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:219 / 228
页数:10
相关论文
共 56 条
[11]   Ion sieving effects in the electrical double layer of porous carbon electrodes: Estimating effective ion size in electrolytic solutions [J].
Eliad, L ;
Salitra, G ;
Soffer, A ;
Aurbach, D .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (29) :6880-6887
[12]   Activated carbons from KOH-activation of argan (Argania spinosa) seed shells as supercapacitor electrodes [J].
Elmouwahidi, Abdelhakim ;
Zapata-Benabithe, Zulamita ;
Carrasco-Marin, Francisco ;
Moreno-Castilla, Carlos .
BIORESOURCE TECHNOLOGY, 2012, 111 :185-190
[13]   Capacitance and pore-size distribution in aqueous and nonaqueous electrolytes using various activated carbon electrodes [J].
Endo, M ;
Maeda, T ;
Takeda, T ;
Kim, YJ ;
Koshiba, K ;
Hara, H ;
Dresselhaus, MS .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (08) :A910-A914
[14]   EDLC performance of carbide-derived carbons in aprotic and acidic electrolytes [J].
Fernandez, J. A. ;
Arulepp, M. ;
Leis, J. ;
Stoeckli, F. ;
Centeno, T. A. .
ELECTROCHIMICA ACTA, 2008, 53 (24) :7111-7116
[15]   Performance of mesoporous carbons derived from poly(vinyl alcohol) in electrochemical capacitors [J].
Fernandez, J. A. ;
Morishita, T. ;
Toyoda, M. ;
Inagaki, M. ;
Stoeckli, F. ;
Centeno, T. A. .
JOURNAL OF POWER SOURCES, 2008, 175 (01) :675-679
[16]   Modification of the surface chemistry of activated carbons [J].
Figueiredo, JL ;
Pereira, MFR ;
Freitas, MMA ;
Orfao, JJM .
CARBON, 1999, 37 (09) :1379-1389
[17]   The structure and properties of the carbon non-wovens modified with bioactive nanoceramics for medical applications [J].
Fraczek-Szczypta, A. ;
Rabiej, S. ;
Szparaga, G. ;
Pabjanczyk-Wlazlo, E. ;
Krol, P. ;
Brzezinska, M. ;
Blazewicz, S. ;
Bogun, M. .
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, 2015, 51 :336-345
[18]   CATALYTIC ACTION OF ALKALIS ON GASIFICATION REACTION OF CARBON [J].
FRANKE, FH ;
MERAIKIB, M .
CARBON, 1970, 8 (04) :423-&
[19]   Studies and characterisations of various activated carbons used for carbon/carbon supercapacitors [J].
Gamby, J ;
Taberna, PL ;
Simon, P ;
Fauvarque, JF ;
Chesneau, M .
JOURNAL OF POWER SOURCES, 2001, 101 (01) :109-116
[20]   Effect of pore morphology on the electrochemical properties of electric double layer carbon cryogel supercapacitors [J].
Garcia, Betzaida Batalla ;
Feaver, Aaron M. ;
Zhang, Qifeng ;
Champion, Richard D. ;
Cao, Guozhong ;
Fister, Tim T. ;
Nagle, Ken P. ;
Seidler, Gerald T. .
JOURNAL OF APPLIED PHYSICS, 2008, 104 (01)