Nitrogen-doped macro-meso-micro hierarchical ordered porous carbon derived from ZIF-8 for boosting supercapacitor performance

Wang, Ying; Qiao, Mengfei; Mamat, Xamxikamar

doi:10.1016/j.apsusc.2020.148352

Cited by 61 publications

(31 citation statements)

References 32 publications

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“…However, both macro‐pore and meso‐pore sizes shifted towards a larger range between 101–773 nm and 36–46 nm, correspondingly. These configurations provided high ionic active contact and structural stability in support of extensive functionality in energy storage systems [50] …”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

2021

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This study reported an ultrahigh specific capacitance of a supercapacitor, using self‐oxygen doped 3D‐porous carbon derivatives from dried banana leaves. The samples were synthesized by ZnCl2 impregnation at different temperature pyrolysis of 700–900 °C. Furthermore, the overall process significantly increased the specific surface area from 429.6 to 860.4 m2 g−1 followed by the formation of 3D‐interconnected pores structures. Unexpectedly, the activated carbon demonstrated high‐level oxygen dopants between 9.47–12.45%. These valuable physical features showed a ultrahigh specific capacitance of 401 F g−1 and 235 F g−1 in a two‐electrode configuration system, using electrolytes of 1 M H2SO4 and 6 M KOH, respectively. Also, electrochemical properties were evaluated in the form of pellet binder‐free materials. Porous carbon sources were known to generate extensive specific energy of 55.69 Wh kg−1 and specific power of 200.09 W kg−1. Based on the technique and results, the use of hierarchical 3D‐porous carbon derivatives is validated as robust electrode materials in developing high‐performance electrochemical energy storage.

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Section: Resultsmentioning

confidence: 99%

Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

2021

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“…Mesopores and macropores were found to be more diverse than 0.25 M samples with relative sizes ranging from 20 to 47 nm and 55 to 164 nm, respectively. The presence of a relatively large number of meso‐macroporous pores significantly increases the ion diffusion rate on the electrode material surface, thereby causing electrolytes to move in all directions without any obstacles 60,61 . Furthermore, this treatment also affects the nanosheet structure thickness causing it to become thinner approximately ±15 nm.…”

Section: Resultsmentioning

confidence: 99%

Synthesis free‐template highly micro‐mesoporous carbon nanosheet as electrode materials for boosting supercapacitor performances

Taer

Apriwandi

Mardiah

et al. 2022

Intl J of Energy Research

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Summary Porous carbon 2D nanosheets (CNSs) with micro‐mesopores interconnected are indispensable for energy conversion systems and storage applications. Herein, we synthesize free‐template highly micro‐mesoporous carbon nanosheet as electrode material for boosting supercapacitor performances. The activated carbon nanosheets derived from bio‐waste were prepared by chemical impregnation followed by high‐temperature pyrolysis without hard/soft/salt template‐assisted and free‐binder adhesives. Garlic skin wastes were selected as a precursor. Furthermore, activated carbon was designed in pellet/coin solids without the addition of binder materials. The porous carbon pellets exhibit a thin 2D nanosheet structure of 15 nm followed by unique wooden labyrinth‐like and rod‐like structures. The result showed that the impregnation of different chemical concentrations increases the surface area to 273% as high as 1002.920 m2 g−1 with a total volume of 1.3270 cm3 g−1. Moreover, the mesoporosity dominated 66.4%, followed by sub‐ultra‐micropores. In the symmetric supercapacitor, the carbon nanosheet boosted the specific capacitance almost 3‐fold to 320.95 F g−1 in the aqueous electrolyte of 1 M H2SO4. The supercapacitor cell has a high energy density of 43.12 Wh kg−1 and power density of 161.99 W kg−1 at a constant current density of 1.0 A g−1. This work proposes a more effective, green, efficient, and controlled approach to obtain bio‐waste‐based porous carbon 2D nanosheet with a controlled pore structure for energy conversion and storage systems. Novelty Statement The novelty of this study is a green synthesis has possessed highly micro‐mesopores nanosheet bio‐waste. 2D nanosheet was prepared free‐template and free‐binder. Sub‐ultra‐micropores were confirmed with dominated mesoporosity of 66.8%. Carbon nanosheet boosted specific capacitance almost 3‐fold to 320.95 F g−1.

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“…Ini menunjukkan bahwa kinerja kapasitif yang ideal untuk tipe normal kapasitor elektrokimia lapis gdana listrik dan disertai dengan karakteristik pseudo-kapasitansi. Lebih lanjut, sampel precursor menunjukkan kurva CV yang relatif segiempat yang baik mengindikasikan sifat normal kapasitor lapis gdana listrik (Wang et al, 2021). Sampel K-700 menghasilkan kurva segiempat dengan kenaikan arus pada rentang tegangan 0.7-0.9 V yang luas mengkonfirmasi pseudokapasitansi faradaic yang dikaitkan dengan keberadaan kelompok fungsional yang beragam atau heteroatom pada distribusi unsur sampel (Yumak et al, 2020).…”

Section: Analisis Sifat Elektrokimiaunclassified

Analysis of Cyclic Voltammetry dan Galvanostatic Charge Discharge Electrode Supercapacitor based on activated carbon from Kepok Banana Leaf (Musa balbisiana)

2021

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Abstrak. Teknologi penyimpan energi elektrokimia yang ramah lingkungan merupakan aspek yang penting dalam menunjang kinerja sistem konversi energi terbarukan. Studi ini menyiapkan elektroda superkapasitor berbahan asal karbon aktif berpori limbah daun pisang kepok. Sampel dipreparasi melalui impregnasi Natrium hidroksida pada konsentrasi 0,5 m/L dan dipirolisis satu tahap meliputi karbonisasi dan aktivasi fisika. Serbuk karbon yang dihasilkan dikonversi dalam bentuk pellet atau monolit dengan menggunakan hidraulik press tanpa adanya penambahan bahan perekat. Proses karbonisasi dilakukan dari suhu kamar hingga 600 °C pada lingkungan gas N2 sedangkan proses aktivasi fisika dilakukan dari suhu 600 °C hingga pada suhu tinggi dengan tiga jenis suhu yang berbeda meliputi 700 °C, 800 °C, dan 900 °C pada lingkungan gas CO2. Analisis densitas ditinjau sebagai evaluasi awal elektroda karbon berpori. Lebih lanjut, sifat elektrokimia superkapasitor dievaluasi melalui dua teknik yang berbeda meliputi teknik cyclic voltammetry (CV) dan galanostatic charge discharge (GCD) pada sistem dua elektroda dalam elektrolit 1 M H2SO4. Kapasitansi spesifik pada teknik CV adalah sebesar 142 F/g sedangkan dengan teknik GCD menghasilkan kapsitansi spesifik sebesar 154 F/g pada resistansi 42∙10-3Ω. Rapat daya dan rapat energi yang dihasilkan berturut-turut 20,45 Wh/kg dan 38,32 W/kg. Hasil ini mengkonfirmasi bahwa daun pisang berpotensi dijadikan sebagai karbon aktif berpori untuk material dasar elektroda superkapasitor.Abstract. Environmentally friendly electrochemical energy storage technology is an important aspect of supporting global energy fulfillment as a contribution to improving the performance of renewable energy conversion systems. Currently, supercapacitors are considered as a superior electrochemical energy storage technology compared to others. This study performed a supercapacitor with electrodes made from porous activated carbon based on biomass waste, especially banana leaf waste. The sample was prepared by sodium hydroxide impregnated at a concentration of 0.5 m/L dan one-step pyrolysis both carbonization dan physical activation. The carbon powder is converted into pellets or monoliths using a hydraulic press without the addition of any adhesive materials. The carbonization process is performed from room temperature to 600 °C in an N2 gas environment while the physical activation process is carried out from a temperature of 600 °C to a high temperature with three different types including 700 °C, 800 °C, dan 800 °C in CO2 gas atmosphere. Density analysis is reviewed as an initial evaluation of the porous carbon electrode. Furthermore, the electrochemical properties of the supercapacitor were evaluated through two different techniques including cyclic voltammetry (CV) dan galvanostatic charge-discharge (GCD) in a two-electrode system in 1 M H2SO4 electrolyte. The specific capacitance in the CV technique is 142 F/g while the GCD technique produces a specific capacitance of 154 F/g at resistance of 42∙10-3 Ω. The power density dan energy densities for the K-900 are 20.45 Wh/kg dan 38.32 W/kg, respectively. These results confirmed that banana leaves have the potential to be used as porous activated carbon for the supercapacitor electrode.

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Nitrogen-doped macro-meso-micro hierarchical ordered porous carbon derived from ZIF-8 for boosting supercapacitor performance

Cited by 61 publications

References 32 publications

Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

Synthesis free‐template highly micro‐mesoporous carbon nanosheet as electrode materials for boosting supercapacitor performances

Analysis of Cyclic Voltammetry dan Galvanostatic Charge Discharge Electrode Supercapacitor based on activated carbon from Kepok Banana Leaf (Musa balbisiana)

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