Effect of electrolyte concentration on performance of supercapacitor carbon electrode from fibers of oil palm empty fruit bunches

Farma, Rakhmawati; Deraman, Mohamad; Talib, Ibrahim Abu; Awitdrus,; Omar, Ramli; Ishak, M. M.; Taer, Erman; Basri, N. H.; Dolah, B. N M

doi:10.1063/1.4917095

Cited by 19 publications

(25 citation statements)

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“…Pengukuran sel superkapasitor dilakukan dengan laju scan bervariasi yaitu 1 mV/s, 5 mV/s, 10 mV/s, 30 mV/s, 50 mV/s dan 100 mV/s. Nilai kapasitansi spesifik superkapasitor dihitung dengan menggunakan persamaan berikut [4] : Karakterisasi sifat fisis untuk meninjau struktur morfologi dan unsur penyusun elektroda karbon dilakukan dengan alat mikroskop pemindai elektron dan energi dispersi sinar-X.…”

Section: Metode Penelitianunclassified

ANALISA KAPASITANSI SPESIFIK ELEKTRODA KARBON SUPERKAPASITOR dari KAYU KARET terhadap LAJU SCAN BERDASARKAN VARIASI AKTIVASI HNO3

Taer

Zulkifli

Arif

et al. 2016

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AbstrakVariasi kapasitansi spesifik elektroda karbon superkapasitor dari kayu karet terhadap laju scan telah berhasil dianalisa. Pembuatan elektroda karbon meliputi proses pemotongan, pengeringan, karbonisasi, aktivasi, pemolesan dan penetralan. Aktivasi dilakukan secara bertingkat meliputi aktivasi fisika dan kimia. Aktivasi fisika dilakukan menggunakan gas CO2 pada suhu 850 °C selama 2 jam. Sedangkan aktivasi kimia dilakukan dua tahap yaitu dengan 3M KOH kemudian diteruskan dengan aktivasi HNO3 menggunakan variasi konsentrasi sebesar 5%, 15% dan 25%. Pengukuran sel superkapasitor dilakukan dengan metode siklis voltammetri pada laju scan 1 -100 mV/s dalam larutan elektrolit 1M H2SO4.Hasil penelitian menunjukkan bahwa nilai kapasitansi spesifik mengalami penurunan secara eksponensial seiring dengan penambahan laju scan. Laju scan 1 mV/s menghasilkan kapasitansi spesifik tertinggi dan terendah sebesar 81,82 F g-1dan 10,44 F g-1, sedangkan pada laju scan 100 mV/s menghasilkan kapasitansi spesifik tertinggi dan terendah sebesar 19,67 F g-1 dan 4,66 F g-1, masingmasing untuk variasi HNO3 sebesar 25% dan 5%. Hasil pengujian SEM memperlihatkan elektroda karbon memiliki struktur pori yang seragam dan pengujian ED-X menunjukkan persentase unsur karbon tertinggi sebesar 92,53% terdapat pada sampel dengan variasi HNO3 25%. Kata-kata kunci: Superkapasitor, Kapasitansi Spesifik, Laju Scan AbstractSpecific capacitance variation of carbon electrode supercapacitor from rubber wood against scan rate have been successfully analyzed. Fabrication of carbon electrode includes cutting, drying carbonization, activation, polishing and neutralization. Activation was carried out in multi-step process covering the physical and chemical activation. Physical activation was performed by using CO2 gas at a temperature of 850 °C for 2 hour, while the chemical activation process was done by combination of 3M KOH and HNO3 using a variation of concentrations as high as 5%, 15% and 25%. Supercapacitor cell measurements was performed using a cyclic voltammetry method at a scan rate of 1 -100 mV/s in electrolyte solution of 1M H2SO4. The results showed that specific capacitance value decreased with exponentially in the increasing of a scan rate. The highest of specific capacitance values of 81.82 F g-1 and 10.44 F g-1 at a scan rate of 1 mV/s, while at the scan rate of 100 mV/s found the lowest of 19.67 F g-1 and 4.66 F g-1 for HNO3 variation of 25% and 5%, respectively. The SEM data showed that the carbon electrode have a hierarchical pore structure and the ED-X result found that highest percentage of carbon element as high as 92.53% at sample with a variation of 25% HNO3.

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Section: Metode Penelitianunclassified

ANALISA KAPASITANSI SPESIFIK ELEKTRODA KARBON SUPERKAPASITOR dari KAYU KARET terhadap LAJU SCAN BERDASARKAN VARIASI AKTIVASI HNO3

Taer

Zulkifli

Arif

et al. 2016

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“…[9][10][11] The power density of the supercapacitor can therefore be increased either by increasing the potential or by reducing the ESR. Higher potential can be controlled by modifying the electrolyte properties, 12,13 while a lower ESR value can be achieved by reducing the internal resistance of the electrode and the contact resistance between the electrodes and the current collectors. 9 It has been observed that supercapacitors with low ESR values can be fabricated by modifying aluminium current collectors with carbon material via sol-gel and coating, 11 modifying aluminium current [15][16][17][18][19][20][21][22][23][24][25][26] Studies on the modification of separators have also been reported elsewhere.…”

Section: Introductionmentioning

confidence: 99%

A New Approach towards Improving the Specific Energy and Specific Power of a Carbon-Based Supercapacitor using Platinum-Nanoparticles on Etched Stainless Steel Current Collector

et al. 2015

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We report an improved performance of a carbon-based supercapacitor using etched stainless steel (SS) current collector deposited with platinum nanoparticles (PtNs) over bare SS current collector/un-etched SS current collector deposited with PtNs. The PtNs grown on the etched surface of the current collectors provides a better contact with the surface of activated carbon monoliths electrode prepared from pre-carbonized fibres of oil palm empty fruit bunches. X-ray diffraction, field-emission scanning electron microscopy, the energy dispersive X-ray analysis, and X-ray photoelectron spectroscopy were employed to investigate the different properties of bare SS current collector and the modified current collector. Electrochemical impedance spectroscopy, cyclic voltammetry and galvanostatic charge-discharge results consistently suggest that the deposition of PtNs on the etched surface of the current collector causes an increase in specific capacitance of 10% (from 105 to 115 F g −1 ), 4% (from 141 to 146 F g −1) and 6% (from 142 to 150 F g −1 ) respectively. Correspondingly, the specific energy increases from 4.12 to 4.51 Wh kg −1 and specific power from 173 to 196 W kg −1 . Also EIS and GCD results respectively show a decrease of 47% (from 1.332 to 0.710 Ω) and 44% (from 1.75 to 0.974 Ω) in equivalent series resistance.

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“…or newly developed electrolytes. Beside active research activities in developing high surface area electrodes and high efficient electrolytes, there has also been growing research activities in developing supercapacitor separators; covering materials such as polypropylene [11], eggshell membrane [12], polyvinyl alcohol (PVA) [13], filter paper [14] and Teflon ring [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous studies on supercapacitor based on activated carbon monoliths (ACMs) electrodes from EFB [5][6][7] and rubber wood saw dust (RWSD) [9], Teflon ring separator [10] was used in the fabrication of cells. The present study, reports the first time usage of polypropylene (PPC), egg shell membrane (ESM) and filter paper (FPW) materials as nanoporous separators in supercapacitor cells based on EFB and RWSD ACMs electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…For carbon based supecapacitor, it is important to use highly porous carbon electrodes having pore size, structure and network which are compatible with the size of electrolyte ions; to ensure that the highest possible numbers of ions are accumulated at almost all available pore walls in the electrodes. In order to achieve this condition, different types of supercapacitor activated carbon electrodes (paste [2], fiber-cloth [3], fibre-sheet [4], composite [5][6][7], film [8], monolith [9,10]) have been developed and tested in different types of conventional electrolytes (Na2SO4, H2SO4, KOH etc.) or newly developed electrolytes.…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous separators for supercapacitor using activated carbon monolith electrode from oil palm empty fruit bunches

Nor

Deraman

Omar

et al. 2014

AIP Conference Proceedings

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Effect of electrolyte concentration on performance of supercapacitor carbon electrode from fibers of oil palm empty fruit bunches

Cited by 19 publications

References 0 publications

ANALISA KAPASITANSI SPESIFIK ELEKTRODA KARBON SUPERKAPASITOR dari KAYU KARET terhadap LAJU SCAN BERDASARKAN VARIASI AKTIVASI HNO3

ANALISA KAPASITANSI SPESIFIK ELEKTRODA KARBON SUPERKAPASITOR dari KAYU KARET terhadap LAJU SCAN BERDASARKAN VARIASI AKTIVASI HNO3

A New Approach towards Improving the Specific Energy and Specific Power of a Carbon-Based Supercapacitor using Platinum-Nanoparticles on Etched Stainless Steel Current Collector

Nanoporous separators for supercapacitor using activated carbon monolith electrode from oil palm empty fruit bunches

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