Research Interest

Advanced Lithium ion Battery

LiFePO₄ is a fascinating material for use as a cathode in Li-ion batteries due to its high electrochemical performance such as a stable voltage and high specific capacity. We have investigated the effect of precursor concentration and the addition of reduced Graphene Oxide (rGO) on the electrical conductivity of cathode material, prepared by hydrothermal or solvothermal methods. We found that the addition of rGO can enhance the conductivity of electrode layer.

Recent publication:

1. J. Karunawan, M.A. Irham, P.H. Widyadharma, O. Floweri, A.H. Aimon, F. Iskandar, Effect of NaTi2(PO4)3 Coating on Improving Capacity Retention of Li-rich Li1.13Ni0.2Co0.2Mn0.47O2 Cathode, IEEE Proceeding-6th International Conference on Electric Vehicular Technology (ICEVT), Bali, 18-21 Nov. 2019, pp. 11-13 (2019)

2. P.H. Widyadharma, M.A. Irham, T.R. Mayangsari, O. Floweri, A.H. Aimon, F. Iskandar, Reducing Synthesis Time of LiNi0.8Co0.15Al0.05O2 (NCA) Cathode Material by Microwave Heat Treatment, IEEE Proceeding-6th International Conference on Electric Vehicular Technology (ICEVT), Bali, 18-21 Nov. 2019, pp. 14-16 (2019)

3. O.B. Abdillah, T.R. Mayangsari, O. Floweri, L. Destiarti, A.H. Aimon, F. Iskandar, Synthesis of Exfoliated Graphene as Anode Material using a Modified Electrochemical Process, IEEE Proceeding-6th International Conference on Electric Vehicular Technology (ICEVT), Bali, 18-21 Nov. 2019, pp. 17-19 (2019)

4. Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery, Energies 12, 1886 (2019)

5. Enhancing the Electrical Conductivity of Graphene Oxide Reduced by L-Ascorbic Acid via MicrowaveAssisted Method, Proceeding - 5th International Conference on Electric Vehicular Technology (ICEVT), October 30-31, 2018, Surakarta, Indonesia, ICEVT 2018, 8628382, pp. 49-52 (2019)

6. Preliminary study of electrical conductivity and electrochemical properties of the influence copper addition in reduced graphene oxide (rGO), Proceeding - 4th International Conference on Electric Vehicular Technology, ICEVT 2017, 8323543, pp. 107-111(2018)

7. Composited reduced graphene oxide (rGO) into LiFePO4/Li2SiO3 and its electrochemical impedance spectroscopy (EIS) properties, Mater. Res. Express, 4 (3), (2017)

Developing a New Type of Environmentally Friendly Phosphor

We introduce the facile synthesis route of a luminescence material consists of boron, carbon and nitrogen (BCNO) without using any rare-earth materials. The luminescence materials could be prepared by facile methods such as hydrothermal and thermal decomposition method. In this research, we also study the mechanism of fluorescence of PL materials.

Recent publications:

1. Physicochemical Study of Multicolor Boron Carbon Oxynitride (BCNO) Using a Urea Combustion Method, Materials Research Express, 6 (2) (2018)

2. Sintering time optimization on red photoluminescence properties of manganese-doped boron carbon oxynitride (BCNO:Mn) phosphor, Materials Research Express 2018 5, 046246 (2018)

3. A Red Emitting of Manganese-doped Boron Carbon Oxynitride (BCNO) Phosphor Materials: Facile Approach and Photoluminescence Properties, RSC Adv., 7, 4161-4166, (2017)

Graphene Quantum Dots and the Luminescence Mechanism

Graphene quantum dots (GQDs) have received great attention because of their unique electronic, optical and chemical properties. We introduced a synthesis of graphene quantum dots (GQDs) containing N atoms using a facile, inexpensive, and environmentally friendly hydrothermal reaction of urea and citric acid. We also investigated the effect of the GQDs’ C–N configurations on their photoluminescence (PL) properties. The dots were confirmed as spherical, with an average diameter of 2.17 nm and the C–N configurations of the GQDs substantially affected their PL intensity. We also studied a PL mechanism for the hydrothermally synthesized GQDs.

Recent publications:

1. Biodegradable Polymer-Coated Multifunctional Graphene Quantum Dots for Light-Triggered Synergetic Therapy of Pancreatic Cancer, ACS Applied Materials and Interfaces 11 (3), pp 2768–2781 (2019)

2. Surface Plasmon Enhanced Nitrogen-doped Graphene Quantum Dots Emission by Single Bismuth Telluride Nanoplates, Advanced Optical Materials. 1700176 (2017)

Development of Catalyst for Reducing the Viscosity of Heavy Oil

Enhanced Oil Recovery is a method to explore unconventional oil that consists of hydrocarbon and some heavy oil. The use of a nanocatalyst is interesting because it can recover the heavy oil. By reducing its viscosity, the heavy oil can be transported easily from underground. We have developed a NiO, αFe₂O₃, Fe₃O₄, and NaX Zeolite nanocatalyst to enhance the recovery of oil. By adding it into the aquathermolysis of heavy oil, it can reduce the viscosity by up to 80% and increase the H/C ratio within short time. It also breaks the long chain of hydrocarbons and makes it easier to transport the oil.

Recent Publications :

1. Development of faujasite-type zeolite and iron oxide as mixed catalyst for aquathermolysis reaction of heavy oil, Materials Research Express 6(2),026206 (2019)

2. Preliminary study of the effect microwave-heating on the morphology and surface area of NaX zeolite, Material Science Forum, 895 MSF, (2017)