Electrochimica Acta最新文献

{"title":"Integrating theoretical and experimental insights into nanoporous gold electrochemistry for enhanced baicalein sensing performance","authors":"Antonio Gomes dos Santos Neto ,&nbsp;Jose Antonio de Oliveira Junior ,&nbsp;Glaucio Régis Nagurniak ,&nbsp;Shuai Zhang ,&nbsp;Marcelo Eduardo Huguenin Maia da Costa ,&nbsp;Liying Liu ,&nbsp;Marco Aurélio Suller Garcia ,&nbsp;Sergio Yesid Gómez González ,&nbsp;Maurício Jeomar Piotrowski ,&nbsp;Cristiane Luisa Jost","doi":"10.1016/j.electacta.2024.145316","DOIUrl":"10.1016/j.electacta.2024.145316","url":null,"abstract":"<div><div>We introduce an innovative electrochemical sensing method for the sensitive detection of Baicalein (BAI), emphasizing a simple surface modification process. The study encompasses both practical and theoretical investigations into the electrochemical behavior of nanoporous gold. Our theoretical analysis, based on advanced quantum-mechanical calculations, demonstrates that the adsorption of BAI molecule on gold-based substrates is energetically favorable, with adsorption energy increasing from an unmodified surface to a more porous substrate. BAI physisorbs on unmodified regions in a horizontal alignment, while it chemisorbs more strongly on nanoporous regions by penetrating the pores. On less modified surfaces, interaction energy predominates, whereas on heavily modified surfaces, distortion energies become more significant due to increased substrate reactivity. These results align with physicochemical characterizations, which reveal that nanoscale modifications, induced by different anodization times, explain the variations in electrode performance. Experimentally, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed using both a gold electrode (GE) and a nanoporous gold electrode (NPGE). The GE was subjected to surface treatment by immersion in H₂SO₄ and potential control at ca. +2.0 V for 40 seconds, resulting in a nanoporous configuration. Following optimizations, Adsorptive Stripping Voltammetry (AdSV) was used to determine BAI. The method achieved detection (LOD) and quantification (LOQ) limits of 0.015 µmol L^-1 and 0.045 µmol L^-1, respectively (E_deposition=-0.25 V; t_deposition=50 s). Additionally, the standard addition method was applied to the NPGE for recovering BAI from spiked synthetic human plasma and urine, with success rates ranging from 93.4% to 106%. This approach exhibited excellent stability, precision, and accuracy, with minimal interference from other substances. Moreover, the theoretical findings provided deeper insights into the selective electrochemical detection of BAI on nanoporous gold surfaces, offering new perspectives on this field.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145316"},"PeriodicalIF":5.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the impact of ionomer content and distribution on inkjet printed cathodes for anion exchange membrane fuel cells","authors":"Jiafei Liu,&nbsp;Marc Secanell","doi":"10.1016/j.electacta.2024.145293","DOIUrl":"10.1016/j.electacta.2024.145293","url":null,"abstract":"<div><div>Electrode composition optimization is critical to achieving high and stable anion exchange membrane fuel cell (AEMFC) performance. In this article, inkjet printing is pioneered as a method to fabricate AEMFC electrodes with varying and graded cathode ionomer loading in order to assess its impact on electrode electrochemical properties, cell performance and stability. Inkjet printed catalyst layers (CLs) exhibited decreasing porosity with increasing ionomer content, maintaining a constant active area at 50 <span><math><mrow><mo>°</mo><mi>C</mi></mrow></math></span> under fully humidified conditions. The increase in active area and ionic conductivity with increasing ionomer content was detectable only at higher temperatures. At 60 <span><math><mrow><mo>°</mo><mi>C</mi></mrow></math></span> with 90% relative humidity inlet gases, the AEMFCs with cathode electrodes with optimal 20 wt% uniform ionomer content achieved a highly repeatable and stable performance of 0.53 <span><math><mrow><mtext>W</mtext><mo>/</mo><msup><mrow><mtext>cm</mtext></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> with a total loading of 0.3 <span><math><mrow><msub><mrow><mtext>mg</mtext></mrow><mrow><mtext>Pt</mtext></mrow></msub><mo>/</mo><msubsup><mrow><mtext>cm</mtext></mrow><mrow><mtext>CL</mtext></mrow><mrow><mn>2</mn></mrow></msubsup></mrow></math></span>. Grading the cathode ionomer content, with higher concentration near the membrane and lower near the gas diffusion layer (GDL), does not improve cell performance, indicating neither cathode conductivity nor mass transport limits performance. When tested at 80 <span><math><mrow><mo>°</mo><mi>C</mi></mrow></math></span>, AEMFCs with a graded cathode ionomer structure (30 wt% near the membrane and 20 wt% near the GDL) demonstrated improved stability compared to those with a uniform 20 wt% ionomer content. This stability improvement is attributed to better water retention with more cathode ionomer content, as evidenced by the cell’s ability to maintain low resistance.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145293"},"PeriodicalIF":5.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of high-efficiency perovskite solar cells using benzodithiophene-based random copolymeric hole transport material","authors":"Vijay Srinivasan Murugesan ,&nbsp;Michael Ruby Raj ,&nbsp;Hock Beng Lee ,&nbsp;Neetesh Kumar","doi":"10.1016/j.electacta.2024.145315","DOIUrl":"10.1016/j.electacta.2024.145315","url":null,"abstract":"<div><div>The design of donor-acceptor (D-A)-based random copolymers-type hole transporting materials (HTMs) are important for achieving superior performance of perovskite solar cells (PSCs) with high durability. In this work, a 2-alkylthienyl-substituted benzodithiophene (BDTT)-based random copolymer (denoted as <strong>RCP-BDTTPD</strong>), containing 2-ethylhexylthiophene-substituted benzo[1,2-b:4,5-b′]dithiophene (BDTT as an electron-donor; M1) and two different side-chain functionalized thieno[3,4-c]-pyrrole-4,6‑dione as the electron-acceptors (<strong>M2</strong> and <strong>M3</strong>), is prepared and applied as an efficient interfacial HTM for PSCs. The optical, electrochemical, and electronic properties of <strong>RCP-BDTTPD</strong> are shown to be structurally and energetically viable to serve as HTM for PSCs. The <strong>RCP-BDTTPD</strong> has deeper highest occupied molecular orbitals (HOMO; −5.53 eV) and lowest unoccupied molecular orbitals (LUMO; −3.57 eV) energy levels. This is shown to be energetically suitable for realizing better compatibility with Cs-containing formamidinium/methylammonium (FAMA) mixed-cation perovskite as light absorber having HOMO energy level (−5.85 eV). The <strong>RCP-BDTTPD</strong> possessing gradient band alignment with perovskite, which is shown to be highly significant for the extraction of charge carriers, resulting in higher hole mobility of PSCs. <strong>RCP-BDTTPD</strong> delivered a reasonably good V_oc of 1.10 V and higher <em>J</em>_sc of 19.01 mAcm⁻² and, champion power conversion efficiency (PCE) up to 15.30 % with hole mobility (1.34×10⁻³ cm²V⁻¹s⁻¹) and high durability (Encapsulated cell retention of its PCE about 98 % over 16 h under harsh environment: Temp. ∼85 °C, RH∼85 %). This work demonstrating a potential application of <strong>RCP-BDTTPD</strong> based HTMs for the fabrication of high-performance PSCs with high durability as well as low cost.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145315"},"PeriodicalIF":5.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective electrooxidation of glucose towards gluconic acid on Ni@Au foam electrodes","authors":"Erwann Ginoux ,&nbsp;Thibault Rafaïdeen ,&nbsp;Patrick Cognet ,&nbsp;Laure Latapie ,&nbsp;Christophe Coutanceau","doi":"10.1016/j.electacta.2024.145307","DOIUrl":"10.1016/j.electacta.2024.145307","url":null,"abstract":"<div><div>Ni@Au electrodes are prepared by galvanic replacement of Ni atoms of a commercial Ni foam by Au atoms. The physicochemical characterizations indicate gold atomic ratios of ca. 6 %, independently on the galvanic replacement time (1, 2 and 3 min), but differences in the structure of the deposited gold layers. The shapes of the cyclic voltammograms recorded in a 0.1 M NaOH aqueous electrolyte indicate that both Au and Ni sites are accessible. In the presence of 0.1 M glucose, the same oxidation onset potential of ca. 0.3 V vs RHE and a comparable activity in terms of achieved geometric current densities were recorded for all the Ni@Au electrodes. The long term electrolyses of 0.1 M glucose in 0.1 M aqueous KOH electrolyte on the Ni@Au electrodes performed at cell voltages corresponding to anode potentials of 0.575 V, 0.675 V and 0.775 V vs RHE show a surprising excellent stability over 5 h, which is explained by the presence of a Ni(OH)₂ layer on the surface of the Ni foam in contact with the deposited gold layers. Conversions up to 60 % are obtained after 5 h electrolyses with the Ni-Au electrode obtained after 3 min deposition, with 100 % selectivity and faradaic efficiency towards gluconic acid for all the electrodes and for the lower potential of 0.575 V vs RHE. Increasing the glucose and KOH initial concentrations decreases the conversion rate, selectivity and faradaic efficiency.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145307"},"PeriodicalIF":5.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical carboxylation: Green synthesis of atrolactic acid using boron-doped diamond electrodes","authors":"Yuvaraj M. Hunge ,&nbsp;Toya Inaba ,&nbsp;Keizo Ishihara ,&nbsp;Kai Takagi ,&nbsp;Ryoya Okamura ,&nbsp;Hiroshi Uetsuka ,&nbsp;Chiaki Terashima","doi":"10.1016/j.electacta.2024.145310","DOIUrl":"10.1016/j.electacta.2024.145310","url":null,"abstract":"<div><div>Electrochemical CO₂ fixation is vital for sustainability in the chemical industry, yet the selective synthesis of multi-carbon products remains challenging. Organic electrosynthesis offers promise by enabling precise control over reaction conditions and facilitating novel reactivity patterns. One such technique, electrochemical carboxylation, involves coupling CO₂ with organic molecules to produce carboxylic acids. Specifically, electro-carboxylation of acetophenone yields atrolactic acid, a valuable precursor for nonsteroidal anti-inflammatory drugs, providing a greener alternative to traditional production methods. This study focuses on the synthesis and characterization of boron-doped diamond (BDD) films using the microwave plasma-assisted chemical vapor deposition (MP-CVD) method and synthesized BDD electrodes were then used for the electrolytic carboxylation of acetophenone. Various analytical techniques, including X-ray diffraction (XRD), Raman spectroscopy, and laser microscopy, etc. were employed to characterize the BDD films. Various BDD films synthesized for different durations were utilized in the electrolytic carboxylation of acetophenone, with the highest yield of atrolactic acid (25 %) achieved using a BDD film synthesized over 6 h. Also, the effect of BDD surface modification i.e. oxygen and hydrogen terminated BDD on the synthesis of atrolactic acid was studied. Additionally, different electrolytes were employed in the synthesis process of atrolactic acid. A comparative study between Pt and BDD electrodes for the electrolytic carboxylation of acetophenone was conducted, and a mechanism for the formation of atrolactic acid was proposed.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145310"},"PeriodicalIF":5.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of cation exchange membrane characteristics in CO2 electrolysis to CO using acid anolyte","authors":"Alan M.P. Sakita,&nbsp;Edson A. Ticianelli","doi":"10.1016/j.electacta.2024.145308","DOIUrl":"10.1016/j.electacta.2024.145308","url":null,"abstract":"<div><div>Cation exchange membranes are considered a suitable option for zero-gap CO₂ electrolysis due to their potential to avoid carbonation and improve carbon efficiency. However, the use of acidic anolytes remains an issue due to high hydrogen production. This study investigates Nafion® membranes (111, 112, 115, 211, and 212) with different thicknesses produced by extrusion or solution-cast processes in a zero-gap cell with an acidic anolyte containing K₂SO₄. Faradaic efficiencies for CO production (FE_CO) are higher with thinner membranes, regardless of the manufacturing process, reaching FE_CO around 75 % at 50 mA cm⁻². Additionally, membranes with similar thicknesses (∼50.8 µm) but produced in different ways displayed flow field carbonation after 3 h of electrolysis at 30 °C and 50 mA cm⁻². Linear sweep voltammetry (LSV) in full and half-cell configurations shows limiting diffusion current (i_L) relative to proton transport for all the employed membranes, no matter the thickness. In contrast, the i_L for Nafion® 115, the thicker membrane, is suppressed, indicating that proton depletion is fast and the electrode surface alkalinization primarily results from water reduction in this case. A mechanistic analysis was performed to explain the behavior of the limiting currents in the cell with Ar- and CO₂-feed, indicating that CO₂ reduction aids in the consumption of <em>H</em>⁺ provided by the membrane, increasing the local pH at less negative potentials. Overall, thinner membranes exhibited higher values of FE_CO and energy efficiency for CO (EE^%_CO). However, solution-cast membranes are more prone to provide <em>K</em>⁺, leading to better performance than those prepared by extrusion.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145308"},"PeriodicalIF":5.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Signal amplification platform based on 2D MOF-on-MOF architectures-derived Co-decorated carbon@nitrogen-doped porous carbon for enhanced electrochemical acetaminophen sensing","authors":"Xue Zhang ,&nbsp;Xingpai Cai ,&nbsp;Tingting Zhang ,&nbsp;Zhuzhen Chen ,&nbsp;Wangxing Cheng ,&nbsp;Zhenbao Li ,&nbsp;Linwei Chen ,&nbsp;Nannan Lu","doi":"10.1016/j.electacta.2024.145311","DOIUrl":"10.1016/j.electacta.2024.145311","url":null,"abstract":"<div><div>Two-dimensional (2D) carbon-carbon hybrids derived from metal-organic frameworks (MOFs) are regarded as an intriguing type of electrode material in electrochemical sensing. In this work, a Co-decorated carbon@nitrogen-doped porous carbon heterostructure (Co/C@NC) was prepared via the simple calcination of 2D ZIF-L(Co)@ZIF-8. In this MOF-on-MOF precursor, the outer ZIF-8 layer not only prevents the collapse of ZIF-L(Co) during calcination but also endows the outer carbon an extended surface area and porous structure for more accessible active sites and a fast mass transfer process. Meanwhile, the formed CoNPs could facilitate the generation of graphitic carbon layers, which enhances electrocatalytic activity and boosted conductivity. Owing to these merits, the Co/C@NC-based sensor displays high electrochemical activity for acetaminophen (APAP) detection with a wide linear range (4 × 10^–7 - 2 × 10^–4 M) and a lower detection limit (8.2 × 10^–8 M). The constructed sensor has been utilized for the analysis of APAP in real samples, yielding acceptable recovery between 96.6% and 104.0%. This work presents an efficient and convenient method for designing MOF-on-MOF-derived 2D carbon-carbon hybrids, which hold a promising prospect in electrochemical analysis.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145311"},"PeriodicalIF":5.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion properties and mechanisms of friction stir lap welded TiB2/2024 aluminum matrix composite joint","authors":"Shuai Chen ,&nbsp;Pengliang Niu ,&nbsp;Yongxian Huang ,&nbsp;Yongbing Li ,&nbsp;Xurong Fu ,&nbsp;Liming Ke ,&nbsp;Fencheng Liu ,&nbsp;Fenggang Liu","doi":"10.1016/j.electacta.2024.145306","DOIUrl":"10.1016/j.electacta.2024.145306","url":null,"abstract":"<div><div>The corrosion properties and mechanisms of friction stir lap welded (FSLWed) TiB₂/2024 aluminum matrix composite joint immersed in 3.5 wt.% NaCl solution were deeply investigated. Electron backscatter diffraction (EBSD), transmission electron microscopy (TEM) and high resolution TEM (HRTEM) were conducted to characterize the microstructural evolution of various zones across the joint cross-section. The appearance and penetration depth of the etched surfaces were observed by scanning electron microscopy (SEM). The elements on the etched surface were analyzed by EPMA. Results show that the corrosion properties of the 600/200 (rotational speed 600 r/min, travelling speed 200 mm/min) joint are higher than those of the 400/200 joint. It is noted that the corrosion properties of the stir zone (SZ) are higher than those of base material (BM) and heat affected zone (HAZ) based on the open circuit potential (OCP), the corrosion current <em>i_corr</em>, the impedance <em>R_corr</em> and the corroded appearance after immersion corrosion regardless of the welding parameters.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145306"},"PeriodicalIF":5.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hierarchical Co3O4 anode for high-performance Na-ion battery","authors":"Mewin Vincent ,&nbsp;Sandra Sajeev ,&nbsp;Monika Srivastava ,&nbsp;Ewa Kowalska ,&nbsp;Sugarthi Srinivasan ,&nbsp;Damian Kowalski","doi":"10.1016/j.electacta.2024.145309","DOIUrl":"10.1016/j.electacta.2024.145309","url":null,"abstract":"<div><div>Despite excellent theoretical perditions, sodium-ion batteries have not yet evolved as a reliable replacement of current lithium-ion technology, mostly due to a lack of high capacity-long cycling electrodes. Among the various candidates cobalt(II,III)oxide, Co₃O₄, is expected to deliver an excellent electrochemical characteristics, owing to its multi-electron conversion type nature, however, usually fails in terms of performance due to the electrode inconsistencies, associated with the poor conductivity and volumetric fluctuations. Herein, we report morphology and crystallinity engineering of the Co₃O₄ nanostructure to substantially improve the charge storage as well as cycling performance. Largely interconnected hierarchical Co₃O₄ synthesized via highly reproducible and industrially viable approach demonstrated efficient charge transport kinetics and excellent volume expansion buffering under the de/sodiation cycles. With its unique structural properties hierarchical electrode delivered an excellent reversible capacity (70 % of theoretical limit @25 mAg^-1), rate performance (123 mAhg^-1 @1Ag^-1) and stable cycling (82 % after 250 cycles @1Ag^-1). <em>In-situ</em> Raman analysis of the electrode reactions revealed conversion type Na-ion storage in the hierarchical type of electrodes.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145309"},"PeriodicalIF":5.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile fabrication of N-doped RGO decorated CoS2 nanoparticles as advanced integrated electrode for enhanced supercapacitor performance","authors":"Xiaona Li ,&nbsp;Weiyang Zhang ,&nbsp;Zhengyan Gu ,&nbsp;Qingbin Cai ,&nbsp;Hongwei Kang ,&nbsp;Baocheng Yang ,&nbsp;Zhikun Li","doi":"10.1016/j.electacta.2024.145312","DOIUrl":"10.1016/j.electacta.2024.145312","url":null,"abstract":"<div><div>Transition metal sulfides (TMSs) are a class of advanced electrode materials for new energy storage devices with superior performance due to their many advantages, such as high specific capacity, good conductivity, low electronegativity, high redox activity, rich variety and low price. Herein, we developed N-doped reduced graphene oxide (N-RGO) decorated CoS₂ nanoparticles nanohybrids (N-RGO/CoS₂, denoted as NGCS) by a facile hydrothermal method. The doped-N process enriches the specific surface area and porosity of RGO nanosheets, which not only forms rich network nanostructures conducive to rapid charge/ion transport, but also promotes more dispersed anchoring of CoS₂, resulting in the formation of smaller-sized CoS₂ nanoparticles that can provide rich and exposed electroactive sites. Therefore, such unique hierarchical porous nanostructures help all components in the nanohybrids to “complement each other's strengths”, so that the fabricated NGCS electrode exhibits a high specific capacitance of 797.1 F <em>g</em>⁻¹ at 0.6 A <em>g</em>⁻¹ and an excellent rate capability with 77.5 % retention (20 A <em>g</em>⁻¹). Furthermore, the assembled NGCS//AC hybrid supercapacitor (HSC) delivers excellent energy density of 41.4 Wh kg⁻¹ (at 719.7 W kg⁻¹) and long-term cyclability with 86.02 % capacitance retention after 13,000 cycles, presenting a promising application potential in new high-performance energy storage and conversion devices.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145312"},"PeriodicalIF":5.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}