Symmetrical Electrode Material Research Articles

Different enhancement of Ni doping on La0.3Sr0.7Fe0.9Ti0.1O3-δ electrodes in symmetrical solid oxide cell

Poor catalytic activity is a significant challenge that needs to be addressed to enable the effective use of perovskite electrodes in symmetrical solid oxide cell (SOC). In this study, high-activity Ni ions were doped into the La0.3Sr0.7Fe0.9Ti0.1O3-δ (LSFTi91) perovskite lattice, which endowed the materials with different facilitation effects in different atmospheres. In an oxidizing atmosphere, the introduction of Ni ions enables La0.3Sr0.7Fe0.8Ti0.1Ni0.1O3-δ (LSFTNi811) to exhibit higher conductivity and oxygen vacancy content, which enhances the adsorption and dissociation of gases. When used as symmetrical electrodes in a solid oxide electrolysis cell, the LSFTNi811 symmetric cell presents higher electrolysis performance than LSFTi91 (1.78 A cm−2 vs. 1.57 A cm−2) at 1.5 V and 800 °C. This is the highest level reported for a single-phase perovskite electrode, underlining its excellent catalytic activity. In a reducing atmosphere, although Ni doping weakens the structural stability of the material, a large number of NiFe nanoparticles precipitate the H2 reaction after material decomposition. In this situation, LSFTNi811 achieves better performance than LSFTi91 as a symmetrical electrode for the solid oxide fuel cell both before and after decomposition. Therefore, LSFTNi811 is a promising symmetrical electrode material for SOCs.

Enhanced catalytic activity and durability of Ru–Fe alloy-modified Sr1.95Fe1.5Mo0.5O6-δ nanostructured symmetric electrode

The stable and advanced catalytic symmetrical electrode material can reduce the number of electrode exchange in hydrocarbon fuel and extend the service life of symmetrical solid oxide fuel cells (SSOFCs). In this study, Sr1.95Fe1.45Ru0.05Mo0.5O6-δ (SFRM) perovskites were developed and applied as both fuel and air electrode materials for SSOFCs for the first time. The peak power density (PPD) of SSOFC using SFRM electrodes is 583.6 mW cm−2, which is higher than that of SSOFC using SFM electrodes at 800 °C. Additionally, with an increase in reduction time, the maximum power density further increases by 20%–804.9 mW cm−2 with the exsolution of Ru–Fe antiparticles. Importantly, Ru doping results in a significant decrease in the size of exsolved nanoparticles and leads to a larger specific surface area. In the atmosphere of pure methane, Ru doped SFM increased from 130.9 to 185.1 W cm−2 compared with pure phase, and the discharge performance of SFRM electrode at 850 °C was more stable than that of SFM electrode. Thus, SFRM electrodes present a promising and viable option for enhancing the performance of SSOFCs.

Simultaneous electrochemical reduction of water and oxidation of carbon in a solid oxide cell for separately producing hydrogen and carbon monoxide

Hydrogen can be produced from reduction of water at the cathode of a solid oxide electrolysis cell (SOEC) and electricity and CO gas can be co-generated from the oxidation of carbon at the anode of a direct carbon solid oxide fuel cell (DC-SOFC). In the present work, a solid oxide cell (SOC) combining the cathode reaction of the SOEC and the anode reaction of the DC-SOFC is proposed, prepared, and investigated. It is demonstrated that hydrogen and CO can be separately produced from the cathode and anode through simultaneous reduction of water and oxidation of carbon in such a H2O-C SOC. Resistances from electrode polarizations are analyzed through measuring current-voltage characteristics, overpotentials, and AC impedances of the cell. The advantage of the H2O-C SOC over two separately operated SOEC and DC-SOFC is verified by the resistance analysis. An electrolyte-supported H2O-C SOC, with a cermet of silver and gadolinium-doped ceria (Ag-GDC) as the symmetrical electrode material and a steam concentration of 50 % at the cathode, gives an operating current density of 0.67 A cm-2 at the thermal neutral voltage (0.7 V). It stably operates at 0.2 A cm-2 under an applied voltage of only 0.16 V, producing pure hydrogen from the cathode and CO with a concentration of 88 % from the anode. The performance is significantly improved by using an anode-supported H2O-C SOC which gives an operating current density of 2.27 A cm-2 at the thermal neutral voltage.

A-site alkali metal-doped SrTi0.3Fe0.7O3-δ: A highly stable symmetrical electrode material for solid oxide electrochemical cells

To addresses the limitations in electrode performance observed at temperatures ≤700 °C, attributed to the low oxygen surface exchange coefficient primarily caused by high Sr surface segregation, we developed an electrode performance enhancement strategy involving A-site alkali metal doping to SrTi1-xFexO3-δ (STF)-based perovskite. Here, we present the symmetrical electrode material for solid oxide electrochemical cells (SOCs), Sr0.95Mg0.05Ti0.3Fe0.7O3-δ (SMTF), demonstrating a unique combination of excellent symmetrical electrode performance and long-term stability. A-site Mg doping reduces the Sr surface segregation and improves the conductivity but also significantly enhances its electrochemical performance. At 700 °C, the performance of SMTF symmetric cell in both fuel cell and electrolysis modes is 1.5 times higher than that of STF. Moreover, under air atmosphere, SMTF demonstrates stable performance (>1000 h) at 1 A cm−2, with no degradation observed after 400 h testing under humidified hydrogen conditions. Additionally, SMTF exhibits excellent CO2 tolerance in CO2-rich atmospheres.

On the structural evolution of pristine P2-type Na0.67Ni0.33Mn0.67O2 for symmetric full cell application

P2 type Na0.67Ni0.33Mn0.67O2 (NNMO) is a widely studied layered oxide cathode material for sodium-ion batteries (SIBs) because of its high capacity (160 mAhg-1 practically achieved) and broad voltage window (2–4.5 V). The redox activity in NNMO is shown by both Ni2+ and Mn4+ ions, making it a prospective symmetric SIB electrode material. The average working potential of the symmetric full cell is less due to the limited average working voltages of both the redoxes in a half cell between 2 V and 4.5 V, resulting in poor energy density. Herein, we report the feasibility of the NNMO symmetric full cell by widening the operational voltage window of NNMO. The electrochemical performance of NNMO half cells between 0.01 V and 4 V and the structural evolution during cycling are mapped by ex-situ XRD. Na0.44MnO2-like tunnel-type structure (Pbam) with high Na+ content (>0.90) exists at potentials close to the Mn3+/4+ redox reaction during cycling. The phase change was relatively reversible, implying that the NNMO anode works at such low voltages without the hazard of severe capacity losses. The symmetric full cell made using NNMO cycled between 0.01 V and 3 V and, at C/10 rate, delivered a capacity of ∼68 mAhg−1.

Enhanced electrochemical performance of (PrBa)xFe1.9Nb0.1O5+δ symmetrical electrodes with A-site deficient for symmetrical solid oxide fuel cells

Symmetrical solid oxide fuel cells (SSOFCs) with symmetrical electrodes have many desirable characteristics compared with conventional SOFCs. However, the lack of electrode materials simultaneously satisfied the high electrocatalytic activity in oxidizing and reducing atmospheres. Herein, a novel perovskite oxide electrode (PrBa)xFe1.9Nb0.1O5+δ ((PB)xFN, x = 1, 0.97, 0.95 and 0.93) was reported as a promising symmetrical electrode material for SSOFCs. XRD results reveal that the (PB)0.95FN sample has a tetragonal structure and good chemical compatibility with Gd0.1Ce0.9O2-δ electrolyte. Among all the samples, (PB)0.95FN has the lowest polarization resistance (Rp). At 800 °C, compared with primary PBFN, the cathode Rp of (PB)0.95FN is reduced from 0.109 Ω cm2 to 0.063 Ω cm2 in air, whereas the anode Rp is decreased from 0.3808 Ω cm2 to 0.3109 Ω cm2 in H2. In addition, an electrolyte-supported single cell with (PB)0.95FN symmetrical electrodes achieves a maximum peak power density at 800 °C, which is enhanced by 14.67 % compared with that of PBFN. A-site deficiency on PBFN perovskite shows better electrochemical performance, which is attributed to an increase in oxygen vacancy concentration. The results indicate that (PB)0.95FN is a potential electrode material for SSOFCs.

Exploring the potential of Withania somnifera-mediated Ag/Mn3O4 nanocomposites as electrode material for high-performance supercapattery device

Background: In this work, a bioengineered symmetric electrode material (anode, cathode) for energy storage devices was successfully demonstrated. Methods: Using Withania somnifera, Ag/Mn3O4 nanocomposite was prepared through sol-gel-assisted green synthesis. Physicochemical properties of Ag/Mn3O4, 431 nm (Ag), 315 nm (Mn3O4) in UV–visible analysis, metal (Ag) and metal oxide (Mn3O4) bonds, crystallinity index with a crystallite size of ∼29 nm from the XRD studies, rod-like morphology (SEM analysis), elemental composition (EDAX analysis), and chemical states (Ag 3d and Mn 2d) were identified through XPS studies. Significant findings: The cyclic voltammetry profiles of Ag/Mn3O4 exhibit the supercapattery behaviour with a specific capacitance of 254 F/g at a scan rate of 5 mVs−1 and a cyclic retention of 92.3 %. The fabricated symmetric supercapattery device (SSD) has an energy density of 18.5 Whkg−1 and a power density of 2084 Wkg−1. The stability of the complex is also studied in theoretically.

Novel spinel based high entropy oxide as electrode for symmetric SOFCs

Fabrication of symmetric electrodes for intermediate temperature SOFCs can significantly reduce fuel cell production costs without compromising efficiency. Herein, we report a novel spinel based high entropy oxide (CuLiFeCoNi)1.4Mn1.6O4-δ (CM-HEO) that exhibit better symmetric electrode properties than the parent spinel oxide, Cu1.4Mn1.6O4-δ (CM). The prepared HEO exhibited good structural and thermal stability up to 800 °C as inferred from the XRD, Raman and TGA-DSC results. Temperature-programmed reduction and desorption profiles of CM-HEO outperformed CM by exhibiting hydrogen adsorption and lower CO2 desorption across different temperature ranges. The enhancement of Lewis acid-base sites is evident from the XPS analysis validating the observed increase in HOR and ORR activity. The high electrocatalytic activity of the material arise from its lower activation energies (0.27 eV in air, 0.09 eV in dry H2 and 0.03 eV in dry CH4) with a polarisation resistances of 0.152 Ωcm2 under ambient atmosphere and 0.044 Ωcm2 under dry H2. These findings exalt CM-HEO as an efficient symmetric SOFC electrode material.

Achieving excellent CO2/H2O conversion performance in symmetrical solid oxide electrolysis cells through in situ exsved Ni–Fe alloy nanoparticles

Symmetric solid oxide electrolysis cells (SSOECs) are widely studied because they can simplify the preparation process and save costs. In this study, high-performance symmetric electrode material La0.5Sr0.5Fe0.8Ni0.1Nb0.1O3-δ (LSFNiNb) is proposed. A heterogeneous structure with high catalytic activity is constructed via in-situ exsolution of Ni–Fe alloy nanoparticles (NPs). LSFNiNb shows the highest electrical conductivity of 157 S cm−1 in the air at 650 °C. In an atmosphere of 5% H2–95% N2, the polarization impedance is 0.302 Ω cm2 at 800 °C. While the current density is 0.767 A cm−2 in 60% CO2–20% H2O-20% H2, at 800 °C and 1.5 V. In addition, there is no significant degradation in SOEC mode at a current density of 0.2 A cm−2 for 110 h.

Tailoring the electrode material and structure of rocking-chair capacitive deionization for high-performance desalination.

With the gradually increasing requirement for freshwater, capacitive deionization (CDI) as a burgeoning desalination technique has gained wide attention owing to its merits of easy operation, high desalination efficiency, and environmental friendliness. To enhance the desalination performance of CDI, different CDI architectures are designed, such as membrane CDI, hybrid CDI, and flow-electrode CDI. However, these CDI systems have their own drawbacks, such as the high cost of membranes, capacity limitation of carbon materials and slurry blockage, which severely limit their practical application. Notably, rocking-chair CDI (RCDI) composed of symmetric electrode materials delivers excellent desalination performance because of its special dual chamber structure, which can not only break through the capacity limitations of carbon materials, but also deliver a continuous desalination process. Although RCDI showcases high promise for efficient desalination, few works systematically summarize the advantages and applications of RCDI in the desalination field. This review offers a thorough analysis of RCDI, focusing on its electrode materials, structure designs and desalination applications. Furthermore, the desalination performances of RCDI and other CDI architectures are compared to demonstrate the advantages of RCDI and the prospect of RCDI is elucidated.

RuOx modified PrBaFe1.8Hf0.2O5+δ surface for boosting the performance of symmetrical solid oxide fuel cells

The development of symmetrical solid oxide fuel cells (SSOFCs) faces a significant challenge in designing electrode materials that exhibit both high activity and stability. In this work, a novel layered perovskite oxide symmetric electrode material PrBaFe1.8Hf0.2O5+δ (PBFH) for SSOFCs is proposed and synthesized. Doping Hf at the B-site of PrBaFe2O5+δ (PBF) improves the stability in reducing atmosphere and increases the concentration of oxygen vacancies. Furthermore, a small amount of RuOx is deposited by atomic layer deposition (ALD) onto PrBaFe1.8Hf0.2O5+δ scaffold as symmetric electrodes. The surface modification of ALD-RuOx significantly boosts the catalytic activity for both fuel oxidation and oxygen reduction, simultaneously. Compared to PBF electrodes, the interfacial polarization resistances of RuOx-PBFH decrease to 0.77 Ω cm2 under H2/Ar and 0.021 Ω cm2 under air atmosphere at 800 °C, respectively. At 800 °C, SSOFCs equipped with RuOx-PBFH symmetric electrodes exhibit a high peak power density of 0.85 W cm−2 and 0.41 W cm−2 using humidified hydrogen and propane as fuels, respectively. Moreover, the RuOx-PBFH electrode demonstrates long-lasting performance, displaying high resistance against coking. These findings reveal a facile ALD approach for tailoring symmetric perovskite electrodes, offering robust and efficient electrocatalysis with efficient noble metal utilization.

Fabrication of tricarboxylate-neodymium metal organic frameworks and its nanocomposite with graphene oxide by hydrothermal synthesis for a symmetric supercapacitor electrode material

Efficient energy storage and delivery of electrical energy is necessary for the use of advanced electrode materials in super-capacitors, rendering their development pivotal. We employed simple and economical hydrothermal technique to synthesize Nd-metal organic frameworks (MOFs) and Nd-MOFs/GO composite and evaluated their suitability as electrode materials through comprehensive investigation. Characterizations of the synthesized materials were done by various techniques, including XRD, FTIR (using ATR method) and SEM. Based on the results obtained, it was found that the Nd-MOFs/GO composite-based electrode had a specific capacitance of 633.5 Fg−1 when tested at a current density of 0.3 Ag−1, which is significantly higher than that of Nd-MOFs electrode (11.3 Fg−1). Additionally, electrochemical impedance spectroscopy (EIS) analysis demonstrated the lowest equivalent series resistance (ESR) of 0.8 Ω for the Nd-MOFs/GO electrode. The Nd-MOFs/GO composite electrode exhibited a cyclic stability of 88.76 % after 4000 cycles and coulombic efficiency of 95.1%, when subjected to a current density of 3 Ag−1. Moreover XRD showed that the synthesized hybrid exhibited an improved crystallinity of the hexagonal phase. The FTIR analysis using ATR method confirmed the presence of organic ligands and functional groups in the synthesized materials. The results of our study indicate that the Nd-MOFs/GO hybrid nanocomposite-based electrode material holds potential as a highly efficient candidate for super-capacitor applications. The reported method of synthesizing MOFs provides an effective approach to fabricate new electrode materials with excellent electrochemical characteristics.

Development of titanium-doped SmBaMn2O5+δ layered perovskite as a robust electrode for symmetrical solid oxide fuel cells

It is a big challenge ahead of finding a symmetric electrode material that optimally works as both anode and cathode, with excellent structural and chemical stability and high catalytic activity. Herein, we propose a high-performance symmetric electrode material, SmBaMn1.9Ti0.1O5+δ (SBMTi), with a single A-site layered perovskite phase in both reducing and oxidizing atmospheres. Owing to the high binding energy, titanium doping can enhance the structural stability and improve the catalytic activity to the hydrogen oxidation and oxygen reduction processes. The simple Ti-doping strategy enables a dramatic reduction in stoichiometric oxygen change upon oxidizing and reducing atmosphere alternation, and a considerable decrease in thermal expansion coefficient. The symmetrical cell with SBMTi electrode can provide a maximum power density of 603 mW cm−2 at 900 °C, and shows a relatively stable thermal-cycle and atmosphere alternation performance. The developed SmBaMn1.9Ti0.1O5+δ shows great potential as symmetric electrode in symmetrical solid oxide fuel cells.

Designing of a Free-Standing Flexible Symmetric Electrode Material for Capacitive Deionization and Solid-State Supercapacitors

In this work, a highly efficient free-standing flexible electrode material for capacitive deionization and supercapacitors was reported. The reported porous carbon shows a high surface area of 2070.4 m2 g–1 with a pore volume of 0.8208 cm3 g–1. The material exhibited a high specific capacitance of 357 F g–1 at 1 A g–1 in a two-electrode symmetric setup. A solid-state supercapacitor device has been fabricated with a total cell capacitance of 152.5 F g–1 at 1 A g–1 in a solid PVA/H2SO4 gel electrolyte with an energy density of 21.18 W h kg–1 at a 501.63 W kg–1power density. A long-run stability test was carried out up to 15,000 cycles at 5 A g–1 that showed capacitance retention of 99% with ∼100% Coulombic efficiency. Furthermore, the electrosorption experiment was conducted by a flow-through test by coating on commercially available cellulose thread that was employed, which shows electrosorption ability up to 16.5 mg g–1 at 1.2 V in a 500 mg L–1 NaCl solution. Complete experiments were conducted with a proper procedure, provided by scientific approaches with analytical data. Thus, the reported electrode material showed bifunctional application for energy storage and environmental remediation.

Design of efficient and durable symmetrical protonic ceramic fuel cells at intermediate temperatures via B-site doping of Ni in BaCe0.56Zr0.2Ni0.04Y0.2O3–δ

BaCe0.5Zr0.3Y0.2O3–δ (BCZY), regarded as one of the most promising proton–conducting electrolytes, often experiences difficulty because of its high sintering temperature. Here, a B–site doped BaCe0.56Zr0.2Ni0.04Y0.2O3–δ (BCZNY) electrolytes were fabricated to address this drawback. The impact of Ni addition on sintering and electrical properties was examined. By adding Ni to the B–site of BCZY, a substantial decrease in the sintering temperature was achieved, i.e., from 1600 °C (for BCZY) to 1300 °C (for BCZNY). A conductivity of 0.05 S cm−1 at 700 °C was observed for BCZNY electrolyte in a moist nitrogen environment. In addition, SrFe0.8Mo0.2O3–δ (SFM) is utilized as a symmetrical electrode material due to its high ionic and electronic conductivity. SFM electrode was synthesized via combustion process and exhibited suitable chemical and thermal compatibility with BCZY and BCZNY electrolytes up to 1100 °C. A single–phase cubic structure along with the surface morphology of electrolyte–supported symmetrical cells was confirmed by X–ray diffraction and scanning electron microscopy. Electrochemical impedance spectroscopy was conducted to identify the area–specific polarization resistance (ASR). The lowest ASR values of 0.037, 0.081, and 0.327 Ω cm2 at 800, 700, and 600 °C in humidified hydrogen were obtained in SFM-BCZNY composite electrode. The symmetrical cell achieved a peak power density of 254 m W cm−2 (cell configuration; SFM-BCZNY | BCZNY | SFM-BCZNY) at 800 °C. The fuel cell devices showed long–term stability of the fuel cell device for 100 h at 700 °C under a current of 120 mA cm−2. Considering the presented results, the as-prepared BCZNY is a promising protonic electrolyte for IT-SOFCs.

Influence of N-doped concentration on the electronic properties and quantum capacitance of Hf2CO2 MXene

The electronic properties and quantum capacitance of pristine Hf2CO2 (PH) and N-doped Hf2CO2 systems are investigated using density functional theory (DFT). All the doped systems have the metallic characteristics. The redshift of C-p, Hf-d, O-p, and Hf-p states in valence band gradually increases with the increasing N-doping concentration. The quantum capacitance and the electrode type of Hf2CO2 monolayer can be effectively modulated by N-doping. PH and PH systems with N-doped concentration of 78% are potential cathode materials, while PH systems with N-doped concentration of 11%, 22%, 33%, 44%, 56%, and 67% are potential anode materials, PH systems with 89% and 100% N-doped concentration are suitable for symmetric electrode materials in aqueous system. The wide voltage changes the electrode type of PH system with N-doped concentration of 78%, 89% and 100%. The electrode type of N-doping MXene with mixed terminations are further explored.

Nanoflower copper sulphide intercalated reduced graphene oxide integrated polypyrrole nano matrix as robust symmetric supercapacitor electrode material

Insertion of carbonaceous materials into polymeric matrix is a well-practiced approach for improving mechanical and electrochemical profile. Further, metal sulphides featured with high electrical conductivity and variable oxidation states have emerged as potential candidates for fabricating supercapacitor electrodes. In this work, polymer-derived PPy-rGO-CuS was prepared in the laboratory via in-situ chemical oxidative polymerization technique. The presence of CuS improved redox activity and charge storage capability of the polymer-derived composites. The electrochemical performance of the material, coated over C-paper was evaluated through two electrode symmetric system. The PPy-rGO-CuS composite with 10 % rGO and 5 % CuS (by mass of PPy) illustrated optimum specific capacitance 237.7 F g−1 at 1 A g−1. PGC5 also elucidated high cyclic behavior with constant capacitance retention up to 2000 galvanostatic charge-discharge (GCD) cycles. This enabled to scale up synergistic action among the chemical constituents involved therein. Nonetheless, energy density of PGC5 was recorded 21.1 Wh kg−1 at 1 A g−1. These features markedly affirmed the successful candidature of PGC5 as a high-performance polymer-derived composite electrode material for supercapacitor application.

High performance and stability of PrBa0.5Sr0.5Fe2O5+δ symmetrical electrode for intermediate temperature solid oxide fuel cells

Compared to traditional solid oxide fuel cells (SOFCs), symmetrical solid oxide fuel cells (SSOFCs) have the advantages of simple assembly, low cost, and stable redox processes. In this study, Sr-doped PrBa0.5Sr0.5Fe2O5+δ (PBSF) oxide was prepared and characterized as a symmetrical electrode for hydrocarbon solid oxide fuel cells. PBSF has good structural stability and chemical compatibility with the La0.8Sr0.2Ga0.83Mg0.17O3−δ(LSGM) electrolyte. Sr-doped PrBa0.5Sr0.5Fe2O5+δ sample improved conductivity compared to the parent PrBaFe2O5+δ. At 700 °C, the polarization resistance (Rp) of the PBSF was 0.052 and 1.57 Ωcm2 in air and dry hydrogen, respectively. At 800 °C, the maximum power density of PBSF/LSGM/PBSF fuel cell with 0.3 mm-thick LSGM electrolyte support reached 791 mWcm−2 and 535.8 mWcm−2 using 3% humidified H2 and propane fuel, respectively. In addition, the PBSF symmetrical electrode showed good electrochemical performance and stability for the CO2 electrolysis of SOECs at medium temperatures. Therefore, PBSF may be a potential symmetrical electrode material for SOFCs.

Further optimization of the properties of Pr0.6Sr0.4Fe0.9W0.1O3-δ by Cu-doping as symmetric electrodes for solid oxide fuel cells

Copper-doped Pr0.6Sr0.4Fe0.8Cu0.1W0.1O3-δ (PSFCuW) as a symmetric electrode material is investigated for La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM)-based symmetric solid oxide fuel cells (SSOFCs). The effect of Cu-doping on stability and mechanism of hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) is investigated and analyzed. Fe partially replaced by Cu on the B-site could also keep the phase structure stable after treatment under reducing conditions and improve the electrical conductivity, which reaches 30.3 and 0.78-1 under oxidizing and reducing conditions at 800 oC, respectively. The distribution of relaxation times (DRT) indicates that the rate-limiting step processes under oxidation conditions are oxygen adsorption and diffusion, while hydrogen adsorption and charge transfer have important influences on the rate-limiting step under reduced atmospheres, respectively. Finally, the LSGM-supported SSOFC (PSFCuW|LSGM|PSFCuW) shows excellent stability and reversibility. These results imply that PSFCuW is an up-to-coming symmetric electrode material for application in SSOFCs.

CeO2/PANI/MoS2 composite electrode for symmetric supercapacitor application

This work presents, the synthesized CeO2/PANI/MoS2 tri-composite performance as a symmetric electrode material for supercapacitor application. Analysis of XRD and FTIR was performed on the synthesized materials to investigate their crystalline structure and functional groups. The tri-composite SEM morphology shows a sheet-like structure covered with aggregated cerium and polyaniline nanoparticles. The electrochemical performances of the composite were done using the two-electrode symmetric system in 0.5 M of H2SO4. The resultant specific capacitance from the cyclic voltammetry was 177 F/g at 5 mV/s and from galvanostatic charge-discharge was 62 F/g at 0.5 current density. At 5 A/g, the composite demonstrated 98% capacitance retention after 2000 cycles. The impedance of the electrode materials was studied using electrochemical impedance spectroscopy. The tri-composite's solution resistance and transfer resistance values were 3.09 Ω and 0.51 Ω respectively.