Afriyanti Sumboja
Bandung Institute of Technology
Oxygen evolutionCatalysisNanotechnologyElectrodeInorganic chemistryMaterials sciencePower densityPolyanilineBifunctionalCapacitanceGrapheneElectrocatalystChemical engineeringCathodeCarbonElectrochemistryBattery (electricity)SupercapacitorElectrolyteEnergy storageNanowire
53Publications
29H-index
4,285Citations
Publications 53
Newest
#1M. A. A. Mahbub (ITB: Bandung Institute of Technology)H-Index: 1
#2Celfi Gustine Adios (ITB: Bandung Institute of Technology)
Last. Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
view all 6 authors...
Design and synthesis of low-cost and efficient bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in Zn-air batteries are essential and challenging. We report a facile method to synthesize heterostructure carbon consisting of graphitic and amorphous carbon derived from the agricultural waste of red bean pods. The heterostructure carbon possesses a large surface area of 625.5 m2 g-1 , showing ORR onset potential of 0.89 V vs. RHE and OER overpotential o...
Source
#1Ansor Prima Yuda (ITB: Bandung Institute of Technology)
#2Pierre Yosia Edward Koraag (ITB: Bandung Institute of Technology)
Last. Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
view all 5 authors...
With a remarkable theoretical specific capacity of ~4200 mAh g-1, silicon anode is at the forefront to enable lithium-ion batteries (LIBs) with ultra-high energy density. However, we have yet to see the wide utilization of silicon anode in the commercial LIBs due to several challenges, categorized as intrinsic and extrinsic problems. The intrinsic problems originate from the intrinsic properties of silicon, which include its low conductivity and massive volume expansion upon alloying with lithiu...
Source
#1Bagas Prakoso (ITB: Bandung Institute of Technology)H-Index: 2
#2M. A. A. Mahbub (ITB: Bandung Institute of Technology)H-Index: 1
Last. Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
view all 7 authors...
Source
#1Husaini Ardy (ITB: Bandung Institute of Technology)H-Index: 3
Last. Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
view all 9 authors...
The surface condenser in the steam turbine plays an essential role during the condensation process. Failure of surface condenser tubes is a critical factor for its efficiency and lifetime. This pap...
Source
#1Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
#2Bagas Prakoso (ITB: Bandung Institute of Technology)H-Index: 2
Last. Zhaolin Liu (Agency for Science, Technology and Research)H-Index: 74
view all 9 authors...
Developing a high-performance ORR (oxygen reduction reaction) catalyst at low cost has been a challenge for the commercialization of high-energy density and low production cost aluminium-air batteries. Herein, we report a catalyst, prepared by pyrolyzing the shell waste of peanut or pistachio, followed by concurrent nitrogen-doping and FeCo alloy nanoparticle loading. Large surface area (1246.4 m2 g-1) of pistachio shell-derived carbon can be obtained by combining physical and chemical treatment...
1 CitationsSource
#1Yijie Xu (UCL: University College London)H-Index: 4
#2Afriyanti SumbojaH-Index: 29
Last. Jawwad A. Darr (UCL: University College London)H-Index: 50
view all 6 authors...
Developing large-scale and high-performance OER (oxygen evolution reaction) and ORR (oxygen reduction reaction) catalysts have been a challenge for commercializing secondary zinc–air batteries. In this work, transition metal-doped cobalt–nickel sulfide spinels are directly produced via a continuous hydrothermal flow synthesis (CHFS) approach. The nanosized cobalt–nickel sulfides are doped with Ag, Fe, Mn, Cr, V, and Ti and evaluated as bifunctional OER and ORR catalyst for Zn–air battery applica...
4 CitationsSource
#1Septia Refly (ITB: Bandung Institute of Technology)H-Index: 1
#2Octia Floweri (ITB: Bandung Institute of Technology)H-Index: 1
Last. Ferry Iskandar (ITB: Bandung Institute of Technology)H-Index: 38
view all 7 authors...
One of the emerging issues in solving the electronic waste problem is to address the growing amount of end-of-life Li-ion battery (LIB) waste. In this work, the regeneration of LiNi1/3Co1/3Mn1/3O2 ...
3 CitationsSource
#1Ruth StephanieH-Index: 2
Last. Afriyanti SumbojaH-Index: 29
view all 3 authors...
Composites of electrode materials are of interest to further improve the performance of supercapacitor devices. Among other materials, graphene/polyaniline composite is one of the most promising materials due to their synergistic charge storage mechanism in the form of electrical double layer capacitance and pseudocapacitance. This work presents a facile way to prepare graphene/polyaniline film on a flexible gold deposited PET substrate through a one-step potentiodynamic method. The composites a...
1 CitationsSource
#1Yijie Xu (UCL: University College London)H-Index: 4
#2Afriyanti Sumboja (ITB: Bandung Institute of Technology)H-Index: 29
Last. Jawwad A. Darr (UCL: University College London)H-Index: 50
view all 4 authors...
A range of compositionally-tuned nanosized cobalt nickel sulfides ( 125 cycles) and a decent power density of 87 mW cm−2 at 150 mA cm−2 in zinc–air batteries. The electrochemical study of the series of cobalt nickel sulfides made herein suggests that a high electronic conductivity is responsible for the high bifunctional performance, with Ni(III) being identified as a contributor to the OER, while Co(II) and Ni(II) are identified as contributors to the ORR activity. These cathode materials would...
6 CitationsSource
#1Yuanyuan Ma (Agency for Science, Technology and Research)H-Index: 10
#2Wenjie Zang (NUS: National University of Singapore)H-Index: 18
Last. John Wang (NUS: National University of Singapore)H-Index: 5
view all 11 authors...
Hollow-structuring of active components is among the most effective strategies for improving the kinetics of oxygen electrode catalysts, benefiting from the much-improved active surface area, enhanced accessible active sites, and formation of the desired defects on the exposed surface. Integration of active hollow nanostructures with functionalized carbon nanofibers synergizes the electrochemical performance and mechanical flexibility, which are particularly of interest for all-solid-state zinc–...
15 CitationsSource