Tunable Synthesis of Covalently Coupled G-C3N4/RGO Nanohybrid and N-Doped RGO via Scalable Precursor Composition Control for High Efficiency Metal Free Catalysis Belete Asefa Aragaw, Kamran Akbar, Zhihao Xiang, Abebe Tedla, Amare Aregahegn Dubale, et al. Small Methods, 2026 The development of efficient, scalable metal‐free catalysts is vital for sustainable chemical processes. Here, we report a tunable one‐step thermal synthesis of 2D/2D graphitic carbon nitride/reduced graphene oxide (g‐C 3 N 4 /RGO) nanohybrids and nitrogen‐doped RGO (N‐RGO) by varying the urea‐to‐GO mass ratio. Urea‐rich mixtures yield RGO‐intercalated g‐C 3 N 4 , while GO‐rich compositions produce N‐RGO. GO promotes amine condensation and acts as a structural scaffold for g‐C 3 N 4 growth, while urea serves as a g‐C 3 N 4 precursor, nitrogen dopant, and reducing agent. XRD, FTIR, and XPS analyses confirm sheet exfoliation and the formation of interfacial CN covalent bonds, evidencing strong coupling between g‐C 3 N 4 and RGO. BET and electrochemical impedance results reveal that catalytic enhancement arises primarily from interfacial electronic coupling and accelerated charge transfer rather than surface area effects. The g‐C 3 N 4 /RGO‐60% composite exhibits optimal coupling and achieves 100% conversion of 4‐nitrophenol to 4‐aminophenol within 3 minutes ( k = 1.33 min −1 ), outperforming pristine RGO and g‐C 3 N 4 by 66‐ and 33‐fold, respectively. N‐RGO exhibits high efficiency ( k = 0.94 min −1 ), attributed to enhanced catalytic sites from nitrogen doping. This scalable, low‐cost method enables precise tuning of structureproperty relationships, offering high‐performance metal‐free catalysts for both dark and light‐driven environmental remediation and sustainable organic transformations.
Dual-Functional Surface Engineering of Single-Crystal NMC Cathodes via Residue-to-Coating Conversion for Enhanced Interface Stability Shadab Ali Ahmed, Tripti Agnihotri, Ashok Ranjan, Chia‐Yu Chang, Rehbar Hasan, et al. Small, 2026 Nickel‐rich layered oxides, such as LiNi 0.83 Mn 0.06 Co 0.11 O 2 (NMC), are among the most promising cathode materials for high‐energy‐density lithium‐ion batteries. However, their practical implementation is limited by surface instability and the presence of residual lithium compounds, which degrade performance and complicate scalability. In this study, a dual‐functional surface modification strategy using lithium dihydrogen phosphate (LiH 2 PO 4 ) is presented. A wet impregnation procedure is used to transform the residual surface contaminants (LiOH, Li 2 CO 3 ) into an advantageous surface coating (Li 3 PO 4 ) on single crystal nickel‐rich (SCNMC) cathode materials rather than directly eliminating them through solvent washing process., as confirmed by titration and in situ Gas Chromotography‐Mas (GC‐MS), while the resulting ≈4 nm Li 3 PO 4 layer enhances structural stability, suppresses nickel migration, and mitigates electrolyte‐induced side reactions. Electrochemical tests reveal significantly improved cycling stability (72.96% capacity retention after 100 cycles at 0.2C compared to 18.25% for pristine SCNMC) and enhanced rate capability, supported by improved Li + diffusion kinetics. Synchrotron X‐ray Absorption Spectroscopy (XAS) and post‐mortem analyses further confirm the preservation of Ni oxidation states and reduced cross‐talk effects.
Potassium Underpotential Deposition for Defect-Free Lithium Deposition in Anode-Free Li-Metal Batteries Kassie Nigus Shitaw, Hailemariam Kassa Bezabh, Yosef Nikodimos, Misganaw Adigo Weret, Teshager Mekonnen Tekaligne, et al. Small Methods, 2025 Defects in deposited lithium (Li) severely cause dendrite growth and promote reactions between Li and electrolytes, resulting in active Li loss in anode‐free Li metal batteries (AFLMBs). Herein, potassium underpotential deposition (K‐UPD) is systematically established to heal defective Li and create a K‐Cu bimetallic interface, facilitating uniform bulk Li deposition. The K‐UPD at a potential of ≈1.0 V, higher than the equilibrium potentials of bulk K⁺ (0.1 V) and Li⁺ (0.0 V), significantly lowers the nucleation barrier and mitigates Li dendrite growth due to the better lithiophilicity of K metal compared to Cu. Meanwhile, the higher surface mobility of K atoms than Li atoms enables K metal to heal defects and prevent reactions between Li and electrolytes. The lower adsorption energy (ΔE) of the K atoms (−1.56 eV) than that of Li atoms (0.032 eV) indicates favorable adsorption of the K atom, as confirmed by DFT calculations. As a result, Cu||Li cell containing 1.3 M LiFSI+0.2 M KFSI bimetallic electrolyte reaches >1600 h, while Cu||NMC532 full‐cell achieves a higher average Coulombic efficiency (avg. CE) of 99.6% than the cell with 1.5 M LiFSI electrolyte (≈98.2%) after the 100th cycle. This work offers insights into the K‐UPD mechanism for enhancing interface stability and healing defects in deposited Li.
Fluorine-free electrolytes in batteries: principles, strategies, and advances Boligarla Vinay, Yosef Nikodimos, Tripti Agnihotri, Shadab Ali Ahmed, Teklay Mezgebe Hagos, et al. Energy and Environmental Science, 2025 Electrolytes play a pivotal role in battery technologies, influencing performance and safety.
Heterogeneous Interfaces of Ni3Se4Nanoclusters Decorated on a Ni3N Surface Enhance Efficient and Durable Hydrogen Evolution Reactions in Alkaline Electrolyte Dessalew Dagnew Alemayehu, Meng-Che Tsai, Meng-Hsuan Tsai, Chueh-Cheng Yang, Chun-Chi Chang, et al. Journal of the American Chemical Society, 2025 Transition metal selenides (TMSes) have been identified as cost-efficient alternatives to platinum (Pt) for the alkaline hydrogen evolution reaction (HER) owing to their distinct electronic properties and excellent conductivity. However, they encounter challenges such as sluggish water dissociation and severe oxidative degradation, requiring further optimizations. In this study, we developed a dual-site heterogeneous catalyst, Ni3Se4–Ni3N, by decorating Ni3Se4 nanoclusters on a Ni3N substrate. This catalyst design promoted significant interfacial electronic interactions, modulated electronic structures, and enhanced the adsorption of the intermediates. Various spectroscopic analyses and theoretical calculations revealed that the nitride surfaces improved water adsorption and dissociation, enriching the surface with adsorbed hydrogen (H*) atoms, while the Se sites facilitated hydrogen coupling and subsequent release of H2. Following a hydrogen spillover mechanism, the surface-adsorbed hydrogen atoms were transferred to nearby electron-dense selenide sites for H2 formation and release. Consequently, the optimized catalyst demonstrated improved HER activity, requiring only an ∼60 mV overpotential at 10 mA cm–2 current density and maintained stability under higher potential conditions.
Enabling Ether Electrolyte for Anode-Free Lithium Metal Batteries by Weakening Solvation Power via Asymmetric Dimer Formation TM Hagos, CW Hsu, Y Nikodimos, BW Taklu, T Agnihotri, A Ranjan, ... Nano Energy, 112022 , 2026 2026
Phthalocyanine-Derived Dual-Atom Nickel Catalysts (Ni-DAC) for Efficient Electrocatalytic CO₂ Reduction AB Workie, CFJ Kuo, CW Chiu, YA Awoke, Y Nikodimos, K Lakshmanan, ... Electrochimica Acta, 148655 , 2026 2026 Citations: 1
Anode-Free Batteries: Pioneering Energy Storage Revolution Y Nikodimos, KN Shitaw, TM Hagos, TI Yeh, YC Huang, CL Hsieh, HH Su, ... Chemical Reviews , 2026 2026 Citations: 6
Tunable Synthesis of Covalently Coupled G‐C 3 N 4 /RGO Nanohybrid and N‐Doped RGO via Scalable Precursor Composition Control for High Efficiency Metal … BA Aragaw, K Akbar, Z Xiang, A Tedla, AA Dubale, G Mersha, J Kazmi, ... Small Methods 10 (3), e01220 , 2026 2026
Failure mechanisms and scalability of anode-free lithium-metal and lithium–sulfur batteries KN Shitaw, Y Nikodimos, TM Hagos, E Balajig Tamilarasan, BW Taklu, ... Nature Reviews Clean Technology, 1-19 , 2026 2026 Citations: 5
Dual‐Functional Surface Engineering of Single‐Crystal NMC Cathodes via Residue‐to‐Coating Conversion for Enhanced Interface Stability SA Ahmed, T Agnihotri, A Ranjan, CY Chang, R Hasan, EB Tamilarasan, ... Small 22 (1), e06613 , 2026 2026 Citations: 1
Probing Li 2 S Activation Mechanism in Lithium–Sulfur Batteries via Multimodal Operando Techniques EB Tamilarasan, YC Huang, T Agnihotri, TI Yeh, Y Nikodimos, EA Moges, ... ACS Energy Letters 10 (12), 6390-6400 , 2025 2025 Citations: 2
Two-Step Activations and Liquid Metal Fortified Copper Substrate on Corrosion Tolerance in Anode-Free Lithium–Sulfur Battery BW Taklu, TI Yeh, CY Chang, TM Hagos, Y Nikodimos, SA Vallal, ... ACS Energy Letters 10 (11), 5925-5935 , 2025 2025 Citations: 4
Overcoming Chemo-Mechanical Instability at Silicon-Solid Electrolyte Interfaces in Solid-State Batteries LT Kitaba, Y Nikodimos, SK Merso, BW Taklu, GG Serbessa, WB Dilebo, ... ACS Applied Materials & Interfaces 17 (44), 60411-60425 , 2025 2025 Citations: 4
Reaction-induced heat evolution and interface stabilization from bifunctional chlorine-rich anode for sulfide solid-state batteries BW Taklu, PH Chia, CL Liu, Y Nikodimos, GG Serbessa, LT Kitaba, ... Energy Storage Materials 82, 104552 , 2025 2025 Citations: 3
Unveiling the Chemical Stability and Solvent Compatibility of Halide Solid-State Electrolytes: Insights from Isothermal Calorimetric Titration and Synchrotron Spectroscopy Y Nikodimos, BW Taklu, CY Chang, KN Shitaw, TM Hagos, ZB Muche, ... Chemistry of Materials 37 (19), 7622-7634 , 2025 2025 Citations: 3
Potassium Underpotential Deposition for Defect‐Free Lithium Deposition in Anode‐Free Li‐Metal Batteries KN Shitaw, HK Bezabh, Y Nikodimos, MA Weret, TM Tekaligne, SK Merso, ... Small Methods 9 (8), 2500207 , 2025 2025 Citations: 9
Alleviating parasitic reaction of nickel-rich layered active materials at high voltage cycling by rare-earth metal oxide coating: A comparison of cyclic performance B Jeevanantham, MK Shobana, Y Nikodimos, SA Vallal, WN Su, ... Journal of Power Sources 645, 237237 , 2025 2025 Citations: 9
Novel Gel Polymer Electrolyte Preparation Method for Anode-Free Lithium Metal Battery YN Asgedom, WN Su, BJ Hwang Electrochemical Society Meeting Abstracts 247, 194-194 , 2025 2025 Citations: 2
Heterogeneous Interfaces of Ni 3 Se 4 Nanoclusters Decorated on a Ni 3 N Surface Enhance Efficient and Durable Hydrogen Evolution Reactions in Alkaline … DD Alemayehu, MC Tsai, MH Tsai, CC Yang, CC Chang, CY Chang, ... Journal of the American Chemical Society 147 (19), 16047-16059 , 2025 2025 Citations: 45
Boosting anode interfacial stability in All-Solid-State lithium hybrid batteries with MCMB-Modified stainless steel current collector AT Fenta, Y Nikodimos, SK Merso, A Meniber, MA Weret, KN Shitaw, ... Chemical Engineering Journal 510, 161439 , 2025 2025 Citations: 6
Stabilizing the interface between Li6PS5Cl argyrodite sulfide solid electrolyte and Li via in situ formed LiF-Li3Bi lithiophobic-lithiophilic bifunctional layer GG Serbessa, Y Nikodimos, BW Taklu, SK Merso, ZB Muche, ... Energy Storage Materials 76, 104103 , 2025 2025 Citations: 25
Integrating electrodes and PVDF-HFP/Kevlar nanofiber separator for multi-functions using electrospinning ZB Muche, Y Nikodimos, CY Chang, SK Merso, TM Tekaligne, KN Shitaw, ... Chemical Engineering Journal 505, 159493 , 2025 2025 Citations: 15
Enhancing ionic conductivity and air stability of Li7La3Zr2O12 garnet-based electrolyte through dual-dopant strategy HK Bezabh, LH Abrha, SF Chiu, Y Nikodimos, TM Hagos, MC Tsai, ... Journal of Alloys and Compounds 1010, 177277 , 2025 2025 Citations: 18
Fluorine-free electrolytes in batteries: principles, strategies, and advances B Vinay, Y Nikodimos, T Agnihotri, SA Ahmed, TM Hagos, R Hasan, ... Energy & Environmental Science 18 (15), 7326-7372 , 2025 2025 Citations: 25
MOST CITED SCHOLAR PUBLICATIONS
Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders Y Nikodimos, CJ Huang, BW Taklu, WN Su, BJ Hwang Energy & Environmental Science 15 (3), 991-1033 , 2022 2022 Citations: 343
Halide solid‐state electrolytes: stability and application for high voltage all‐solid‐state Li batteries Y Nikodimos, WN Su, BJ Hwang Advanced Energy Materials 13 (3), 2202854 , 2023 2023 Citations: 167
Dual CuCl doped argyrodite superconductor to boost the interfacial compatibility and air stability for all solid-state lithium metal batteries BW Taklu, WN Su, Y Nikodimos, K Lakshmanan, NT Temesgen, PX Lin, ... Nano Energy 90, 106542 , 2021 2021 Citations: 145
Highly reversible Zn metal anode stabilized by dense and anion‐derived passivation layer obtained from concentrated hybrid aqueous electrolyte BW Olbasa, CJ Huang, FW Fenta, SK Jiang, SA Chala, HC Tao, ... Advanced Functional Materials 32 (7), 2103959 , 2022 2022 Citations: 119
Dual-doped cubic garnet solid electrolytes with superior air stability LH Abrha, TT Hagos, Y Nikodimos, HK Bezabh, GB Berhe, TM Hagos, ... ACS applied materials & interfaces 12 (23), 25709-25717 , 2020 2020 Citations: 116
Multifunctional electrospun PVDF-HFP gel polymer electrolyte membrane suppresses dendrite growth in anode-free li metal battery Y Nikodimos, WN Su, KN Shitaw, SK Jiang, LH Abrha, MA Weret, ... Energy Storage Materials 61, 102861 , 2023 2023 Citations: 73
Electrochemical determination of metronidazole in tablet samples using carbon paste electrode Y Nikodimos, M Amare Journal of analytical methods in chemistry 2016 (1), 3612943 , 2016 2016 Citations: 70
Al–Sc dual-doped LiGe 2 (PO 4) 3–a NASICON-type solid electrolyte with improved ionic conductivity Y Nikodimos, MC Tsai, LH Abrha, HH Weldeyohannis, SF Chiu, ... Journal of Materials Chemistry A 8 (22), 11302-11313 , 2020 2020 Citations: 63
Thermally stable 3D cross-linked fluorinated polyimide/PVDF-HFP hybrid separator for lithium battery applications ZB Muche, Y Nikodimos, TM Tekaligne, SK Merso, T Agnihotri, ... Chemical Engineering Journal 476, 146400 , 2023 2023 Citations: 61
Structural engineering of α-MnO2 cathode by Ag+ incorporation for high capacity aqueous zinc-ion batteries FW Fenta, BW Olbasa, MC Tsai, NT Temesgen, WH Huang, TM Tekaligne, ... Journal of Power Sources 548, 232010 , 2022 2022 Citations: 56
Decoupling Interfacial Reactions at Anode and Cathode by Combining Online Electrochemical Mass Spectroscopy with Anode‐Free Li‐Metal Battery KN Shitaw, SC Yang, SK Jiang, CJ Huang, NA Sahalie, Y Nikodimos, ... Advanced Functional Materials 31 (6), 2006951 , 2021 2021 Citations: 53
A new high-Li+-conductivity Mg-doped Li 1.5 Al 0.5 Ge 1.5 (PO 4) 3 solid electrolyte with enhanced electrochemical performance for solid-state lithium metal batteries Y Nikodimos, LH Abrha, HH Weldeyohannes, KN Shitaw, NT Temesgen, ... Journal of Materials Chemistry A 8 (48), 26055-26065 , 2020 2020 Citations: 50
Boosting the Interfacial Stability of the Li 6 PS 5 Cl Electrolyte with a Li Anode via In Situ Formation of a LiF-Rich SEI Layer and a Ductile Sulfide Composite Solid … GG Serbessa, BW Taklu, Y Nikodimos, NT Temesgen, ZB Muche, ... ACS Applied Materials & Interfaces 16 (8), 10832-10844 , 2024 2024 Citations: 49
Moisture Robustness of Li 6 PS 5 Cl Argyrodite Sulfide Solid Electrolyte Improved by Nano-Level Treatment with Lewis Acid Additives Y Nikodimos, SK Jiang, SJ Huang, BW Taklu, WH Huang, GB Desta, ... ACS Energy Letters 9 (4), 1844-1852 , 2024 2024 Citations: 48
Air-stable iodized-oxychloride argyrodite sulfide and anionic swap on the practical potential window for all-solid-state lithium-metal batteries BW Taklu, Y Nikodimos, HK Bezabh, K Lakshmanan, TM Hagos, ... Nano Energy 112, 108471 , 2023 2023 Citations: 48
Reviving inactive lithium and stabilizing lithium deposition for improving the performance of anode-free lithium–sulfur batteries MA Weret, SK Jiang, KN Shitaw, CY Chang, TM Tekaligne, JC Chiou, ... ACS Energy Letters 8 (6), 2817-2823 , 2023 2023 Citations: 47
Heterogeneous Interfaces of Ni 3 Se 4 Nanoclusters Decorated on a Ni 3 N Surface Enhance Efficient and Durable Hydrogen Evolution Reactions in Alkaline … DD Alemayehu, MC Tsai, MH Tsai, CC Yang, CC Chang, CY Chang, ... Journal of the American Chemical Society 147 (19), 16047-16059 , 2025 2025 Citations: 45
Guiding lithium-ion flux to avoid cell's short circuit and extend cycle life for an anode-free lithium metal battery HH Weldeyohannes, LH Abrha, Y Nikodimos, KN Shitaw, TM Hagos, ... Journal of Power Sources 506, 230204 , 2021 2021 Citations: 45
Effect of selected dopants on conductivity and moisture stability of Li3PS4 sulfide solid electrolyte: a first-principles study Y Nikodimos, WN Su, HK Bezabh, MC Tsai, CC Yang, BJ Hwang Materials Today Chemistry 24, 100837 , 2022 2022 Citations: 41
Solvent-free fabrication of freestanding inorganic solid electrolyte membranes: Challenges, progress, and perspectives Y Nikodimos, M Ihrig, BW Taklu, WN Su, BJ Hwang Energy Storage Materials 63, 103030 , 2023 2023 Citations: 39