Journal of Electroanalytical Chemistry最新文献

{"title":"Dry coating and self-combustion reaction strategy for lithium residual removal and performance enhancement of Ni-rich oxide cathodes","authors":"Phan Phuoc Hien ,&nbsp;Pham Ngoc Thao ,&nbsp;Thi Bich Thuy Hoang ,&nbsp;Van-Chuong Ho","doi":"10.1016/j.jelechem.2025.119209","DOIUrl":"10.1016/j.jelechem.2025.119209","url":null,"abstract":"<div><div>Dry coating application for Ni-rich layered oxide cathode materials is one attractive approach to improving the performance of rechargeable batteries due to their avoiding moisture sensitivity, damage to the layered structure, and environmental issues. However, surface impurities are still severe, causing capacity fading and poor electrochemical cycle life. Herein, we propose a simple dry aluminum oxide surface coating to build a stable surface structure and simultaneously effectively eliminate surface impurities. An exothermic reaction generates a high energy of 23,802 kJ/kg (at 300 °C) to remove LiOH and Li₂CO₃ surface impurities, and a lithium quantity from impurities transferred to the aluminum oxide forms a stability-conducive LiAlO₂ coating layer. Accordingly, the LiAlO₂ coating on Ni-rich oxide layered cathode materials demonstrates the high electrochemical performance of lithium-ion batteries. The results highlight a cost-effective and scalable coating process for cathode active materials, paving the way for large-scale cathode production in lithium-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119209"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ synthesized PtZnCu nanoalloy on carbon cloth for ultrasensitive electrochemical ammonia-nitrogen detection","authors":"Guanda Wang ,&nbsp;Guangfeng Zhou ,&nbsp;Enji Li ,&nbsp;Lan Ding ,&nbsp;Dong He ,&nbsp;Chun Zhao ,&nbsp;Hui Suo","doi":"10.1016/j.jelechem.2025.119211","DOIUrl":"10.1016/j.jelechem.2025.119211","url":null,"abstract":"<div><div>Nanoalloy materials showed excellent, sensitive properties in the research field of ammonia‑nitrogen electrochemical sensors, which have been widely used by researchers. The PtZnCu ternary nanoalloy electrode based on a carbon cloth substrate (PtZnCu-CC) was prepared using one-step electrodeposition. The characterization results showed that the alloying of Zn, Cu and Pt regulated the electronic structure of Pt and enhanced the electrocatalytic oxidation capacity of Pt for ammonia‑nitrogen. Meanwhile, it was proved by density functional theory (DFT) that PtZnCu nanoalloy fully inherited the advantages of PtCu and PtZn nanoalloy, which not only enhanced the adsorption capacity of ammonia but also balanced the free energy of each step. Finally, the sensitivity of the whole electrode to ammonia‑nitrogen was improved. The linear detection range of the sensor based on PtZnCu-CC electrode for ammonia‑nitrogen was 0.5–1000 μM, the sensitivity was 23.9 μA μM⁻¹ cm⁻², and the limit of detection (LOD) was 8.37 nM, which showed satisfactory repeatability, anti-interference and stability. This work provided a specific direction for designing high-performance electrochemical sensors.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119211"},"PeriodicalIF":4.1,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly dispersed ZIF-67-derived co-NC confined in carbon pores enables efficient oxygen reduction in alkaline media","authors":"Run Cai ,&nbsp;Jiahao Jiang ,&nbsp;Pengfei Diao ,&nbsp;Zihan Wei ,&nbsp;Change Yao ,&nbsp;Bosheng Zhou ,&nbsp;Huijuan Zhang ,&nbsp;Wenwen Liu ,&nbsp;Zhong Ma","doi":"10.1016/j.jelechem.2025.119212","DOIUrl":"10.1016/j.jelechem.2025.119212","url":null,"abstract":"<div><div>It is crucial to develop low-cost and efficient electrocatalysts to facilitate oxygen reduction reaction (ORR) and transition metals incorporated into nitrogen-doped carbon matrices (M-NC) catalysts are regarded as a potential candidate to substitute platinum-based electrocatalyst. However, there is still a great challenge in real activity and stability, compared to Pt-based electrocatalysts, for large-scale applications. An effective way to improve the ORR performance for this category of single-atom catalysts is to increase the density of active sites. In this work, therefore, the highly dispersed ZIF-67-derived Co-NC confined in carbon pores electrocatalysts are synthesized by impregnating ZIF-67 precursors into the nanopores of Ketjenblack EC-600JD (KB) resulting in the in-situ growing of small crystals in the pores followed by the high temperature pyrolysis. The as-prepared CoNC-700@C electrocatalyst exhibits excellent ORR performance in alkaline media with an onset potential of 967 mV and a half-wave potential of 892 mV (vs. RHE), which is much higher than that of the commercial Pt/C catalyst. It is inferred that the excellent ORR activity of CoNC-700@C mainly results from the increased density and also enhanced dispersion of active sites due to the confinement effect offered by the pores of KB. This study also provides a simple and effective method to increase the density of active sites for single-atom category materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119212"},"PeriodicalIF":4.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoarchitectonics of fully interpenetrating polymers with low-temperature pyrolysis modulation for double layer capacitor","authors":"Rui Gao ,&nbsp;Zu-Tao Pan ,&nbsp;Zhi-Cai Wang ,&nbsp;Ling-Bin Kong","doi":"10.1016/j.jelechem.2025.119213","DOIUrl":"10.1016/j.jelechem.2025.119213","url":null,"abstract":"<div><div>Carbonization temperature controllable as a key bridge between precursor structure and electrochemical performance. This work investigates a fully interpenetrating polymer network precursor constructed with two molecular chains (o-Phenylenediamine-formaldehyde/potassium polyacrylate), a low-temperature pyrolysis strategy for systematically study the influence of direct carbonization temperature (500–800 °C) on the structural evolution and electrochemical properties of carbon materials derived from it, and obtained a series of porous carbon-based materials. By discussing in detail the physical characteristics of each sample such as morphology and structure, sample elements and pore structure, high-performance carbon-based materials with Sub nanometer micropores (∼0.6 nm) and mesopores coexisted were screened, sub nanopores can shorten ion diffusion pathways and provide abundant charge storage sites. When the carbonization temperature is at 700 °C, the carbon material C-IPN700 has a microporous specific surface area of up to 1168.268 m² g⁻¹ and possesses excellent storage capacity of 358 F g⁻¹ at 0.5 A g⁻¹, which is comparable to the optimal specific capacitance of IPNs-derived carbon materials used so far for double-decker capacitors, and after 9000 long cycle tests, the coulomb efficiency is close to 100%. C-IPN shows high energy density of 9.72 Wh Kg⁻¹ at 125 W Kg⁻¹ power density when used as a symmetric device. For the field of bilayers, C-IPN700 is a potential low-cost, easy-to-prepare low-temperature pyrolyzed carbon material with high energy storage efficiency.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119213"},"PeriodicalIF":4.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A-site cation deficiency-based LSCFN cathode achieving electrochemical performance enhancement in GDC-based solid oxide fuel cells","authors":"Che Wang ,&nbsp;Botao Zhou ,&nbsp;Na Xu ,&nbsp;Zhanlin Xu","doi":"10.1016/j.jelechem.2025.119214","DOIUrl":"10.1016/j.jelechem.2025.119214","url":null,"abstract":"<div><div>To address the challenge of sluggish oxygen reduction reaction (ORR) kinetics in intermediate-temperature solid oxide fuel cells (SOFCs), this study employs an A-site deficiency engineering strategy to design a series of ABO₃ perovskite cathode materials: (La_0.6Sr_0.4)_xCo_0.2Fe_0.7Nb_0.1O_3-δ(LSCFN, x = 1, 0.95, 0.90, 0.85), The structure-property relationship between defect concentration and electrochemical performance in Gd_0.1Ce_0.9O_1.95 (GDC) based oxygen-ion-conducting SOFCs (O-SOFCs) is systematically investigated. The A-site deficiency significantly enhances oxygen ion conductivity and improves the ORR activity of SOFC cathodes through synergistic regulation of oxygen vacancy concentration and B-site metal oxidation states. When the x value reaches 10 %, (LS)_0.90CFN exhibits excellent chemical compatibility with GDC and an increased oxygen vacancy concentration compared to the stoichiometric sample. Electrochemical impedance spectroscopy (EIS) of symmetric cells reveals that (LS)_0.90CFN|GDC|(LS)_0.90CFN achieves the lowest polarization resistance (R_p = 0.037<!--> <!-->Ω·cm²) at 800 °C, with minimal impedance increase after 50 h of operation. Distribution of relaxation times (DRT) analysis confirms optimized oxygen adsorption-dissociation processes and rapid surface oxygen exchange kinetics. A full cell Ni-GDC|GDC|(LS)_0.90CFN) demonstrates a peak power density of 1.130<!--> <!-->W/cm² at 700 °C. This work highlights the effectiveness of defect engineering in synergistically enhancing oxygen-ion conductivity and electrocatalytic activity of perovskite cathodes, offering novel theoretical and technical insights for high-performance intermediate-temperature SOFC cathode design.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119214"},"PeriodicalIF":4.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Transition metal-assisted layer-by-layer binder free deposition for high-performance energy storage devices” [J. Electroanal. Chem. 975 (2024) 118766]","authors":"Muhammad Zahir Iqbal ,&nbsp;Ayesha Zakir ,&nbsp;Maira Javed ,&nbsp;Rashid Ali ,&nbsp;Abhinav Kumar ,&nbsp;H.H. Hegazy ,&nbsp;A.A. Alahmari","doi":"10.1016/j.jelechem.2025.119184","DOIUrl":"10.1016/j.jelechem.2025.119184","url":null,"abstract":"","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119184"},"PeriodicalIF":4.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The regulation of low-valence cobalt by pH: Efficient catalytic electrooxidation of sodium borohydride","authors":"Li Tian,&nbsp;Shuang Zhao,&nbsp;Xiaolu Wu,&nbsp;Jungang Cao,&nbsp;Youzhi Liu,&nbsp;Weizhou Jiao,&nbsp;Jing Guo,&nbsp;Dongming Zhang","doi":"10.1016/j.jelechem.2025.119208","DOIUrl":"10.1016/j.jelechem.2025.119208","url":null,"abstract":"<div><div>Transition metal cobalt-based materials show good catalytic activity for borohydride oxidation reaction, and the valence state of cobalt is an important factor affecting the catalytic activity. By changing pH with (NH₄)₂SO₄ to adjust the valence state of Co, cobalt-based catalysts (CoP-<em>x</em>/Ni@CP) that contain various amount of low-valence cobalt (Co^δ+, 0 &lt; δ ≤ 1) are successfully constructed. The addition of (NH₄)₂SO₄ reduces the pH of the solution (from 6.86 to 5.64), which result in an increase of Co^δ+ (from 1 % to 24.8 %). Co^δ+ can effectively break the B<img>H bond, so efficient catalysis of borohydride oxidation is realized. However, with more B<img>H bonds are broken, intensification of side reactions and change of electrode macrostructure may lead to a decrease of performance. Therefore, it is important to regulate the content of Co^δ+ to optimize catalysis performance. In 1 M NaOH+0.1 M NaBH₄, the current density of CoP/Ni@CP (Co^δ+ content: 17.3 %) prepared by 1 M (NH₄)₂SO₄ is as high as 548 mA cm⁻² (0 V). The assembled direct sodium borohydride fuel cell (DBFC) can reach a maximum power density of 112 mW cm⁻². This study provides a new idea for controlling valence state of elements to achieve improvement of properties and promoting practical application of DBFC.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119208"},"PeriodicalIF":4.1,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of flame etched carbon-fiber microelectrode (FE-CFME) by single walled carbon nanotube/pyreneacetic acid (SWCNT/PAA) nanocomposite for sensitive and selective detection of dopamine","authors":"Vali Alizadeh ,&nbsp;Ghodrat Mahmoudi ,&nbsp;Mojtaba Hosseinifard ,&nbsp;Ahmad Jamali Moghadam ,&nbsp;Masoumeh Servati Gargari","doi":"10.1016/j.jelechem.2025.119199","DOIUrl":"10.1016/j.jelechem.2025.119199","url":null,"abstract":"<div><div>An inexpensive, simple and fast methode of sensor construction as well as negligible sensor surface fouling, along with the high sensitivity and selectivity has always been a challenge in the fabrication of electrochemical sensors. In this study, to achieve this goal, carbon fiber microelectrode (CFME) was pretreated by applying fast flame etching and then simply modifed by pyrene acetic acid (PAA) decorated single walled carbon nanotube (SWCNT) nanocomposite for highly sensitive and selective dopamine (DA) detection. The results show that, although the CFME became active upon flame etching due to introduces nanometer-scale roughness features on it, surface modification by SWCNT-PAA further increases its sensitivity due to synergistic effects. Attaching PAA onto SWCNTs can effectively inhibit the π-stacking of the SWCNTs to prevent their agglomeration and offer a large surface area of electrode, as well as enhancing the diffusion of positively charged DA by its anionic carboxylate moieties. This is the first report on applying PAA/SWCNT nanocomposite for surface modification of flame etched carbon fiber microelectrode (FE-CFME). The surface morphology of the Bare-CFME, FE-CFME, and FE-CFME/SWCNT-PAA electrodes were evaluated using Field-emission scanning electron microscopy (FE-SEM), being correlated with the electrochemical characteristics observed by cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) techniques. As expected, the fabricated sensor showed improved electrochemical response with high sensitivity and selectivity. Under optimum conditions, this sensor exhibited high performance toward DA determination with good linearity in a broad linear range of 0.5 to 22 μM with the detection limit of 12.9 nM, and excellent reproducibility and repeatability. The practical applicability of the fabricated sensor has been successfully tested for the determination of DA in human serum and injection ampoule samples with recovery rates ranging from 98 % to 105 % and relative standard deviations below 3.1 %.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119199"},"PeriodicalIF":4.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cu doped VO2 cathode materials for ultra-stable and high-performance aqueous zinc-ion batteries","authors":"Zihan Wang ,&nbsp;Mengwei Chang ,&nbsp;Heshun Geng ,&nbsp;Peng Cui ,&nbsp;Pengcheng Song ,&nbsp;Fang Hu ,&nbsp;Junhua You ,&nbsp;Kai Zhu","doi":"10.1016/j.jelechem.2025.119210","DOIUrl":"10.1016/j.jelechem.2025.119210","url":null,"abstract":"<div><div>Vanadium-based materials are considered to be the most promising cathode materials for aqueous zinc-ion batteries. Unfortunately, the existence of electrostatic forces between vanadium-based materials materials and zinc ions, as well as their poor intrinsic electrical conductivity and unstable structure, have further hindered the development of vanadium-based materials. Hence, a lamellar nanoflower-structured Cu_0.05VO₂ cathode material is prepared by Cu doped VO₂ in the tunnel to improve its electrical conductivity and weaken the electrostatic repulsion force between it and zinc ions. The Cu_0.05VO₂ cathode can deliver a high capacity of up to 416 mAh g⁻¹ at 0.5 A g⁻¹ and maintain a capacity retention rate of 95.4 % after 6000 cycles at 10 A g⁻¹. Experimental and theoretical calculations show that both the electrical conductivity and the zinc ion transport rate are greatly enhanced in Cu_0.05VO₂. Therefore, the Cu_0.05VO₂ cathode material shows potential for use in AZIBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119210"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SrSnO3/rGO/PANI ternary nanohybrid for asymmetric supercapacitor and its electrochemical performance","authors":"Bhakti G. Thali,&nbsp;Dhiraj S. Agrahari,&nbsp;Chhaya H. Medar,&nbsp;Rajesh M. Kamble","doi":"10.1016/j.jelechem.2025.119204","DOIUrl":"10.1016/j.jelechem.2025.119204","url":null,"abstract":"<div><div>New material development opens the door for improving the characteristics of materials for their supercapacitor applications. This study uses a simple polymerization approach to synthesize a new SrSnO₃/rGO/PANI nanohybrid. The synthesized novel SrSnO₃/rGO/PANI nanohybrid was validated by spectroscopic techniques such as XRD, Raman, XPS, FEG–SEM, TEM, and BET measurements. To assess the electrochemical properties of the generated samples, several electrochemical methods are used, such as Electrochemical Impedance Spectroscopy (EIS), Galvanostatic Charge–Discharge (GCD), and Cyclic Voltammetry (CV). The resultant SrSnO₃/rGO/PANI Nanocomposite (NC) demonstrates remarkable energy storage characteristics with an enhanced specific capacitance (C_s) of 1003.26 F/g and specific capacity (C_sp) value of 239.67 mAh/g at a current density of 1 A/g on three–electrode testing. Additionally, SrSnO₃/rGO/PANI//AC ASC device demonstrated C_s of 237.67 F/g at 1 A/g current density using two–electrode measurements. Moreover, the composite exhibits exceptional cyclic stability, holding onto 81.41 % of its initial capacitance, and showed 90.73 % coulombic retention even after 10,000 cycles. In the end, the ASC device delivered a high power density of 895.02 W/kg at 1 A/g and a high energy density of 106.95 Wh/kg. According to the results, SrSnO₃/rGO/PANI NC serves as an effective electrode material for applications involving energy storage.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119204"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}