Journal of Electroanalytical Chemistry最新文献

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The regulation of low-valence cobalt by pH: Efficient catalytic electrooxidation of sodium borohydride pH对低价钴的调控:硼氢化钠的高效催化电氧化
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-18 DOI: 10.1016/j.jelechem.2025.119208
Li Tian, Shuang Zhao, Xiaolu Wu, Jungang Cao, Youzhi Liu, Weizhou Jiao, Jing Guo, Dongming Zhang
{"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 (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> 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<sup>δ+</sup>, 0 &lt; δ ≤ 1) are successfully constructed. The addition of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> reduces the pH of the solution (from 6.86 to 5.64), which result in an increase of Co<sup>δ+</sup> (from 1 % to 24.8 %). Co<sup>δ+</sup> 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<sup>δ+</sup> to optimize catalysis performance. In 1 M NaOH+0.1 M NaBH<sub>4</sub>, the current density of CoP/Ni@CP (Co<sup>δ+</sup> content: 17.3 %) prepared by 1 M (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> is as high as 548 mA cm<sup>−2</sup> (0 V). The assembled direct sodium borohydride fuel cell (DBFC) can reach a maximum power density of 112 mW cm<sup>−2</sup>. 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}
引用次数: 0
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 单壁碳纳米管/芘乙酸(SWCNT/PAA)纳米复合材料修饰火焰蚀刻碳纤维微电极(FE-CFME)对多巴胺的敏感和选择性检测
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-17 DOI: 10.1016/j.jelechem.2025.119199
Vali Alizadeh , Ghodrat Mahmoudi , Mojtaba Hosseinifard , Ahmad Jamali Moghadam , Masoumeh Servati Gargari
{"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}
引用次数: 0
Cu doped VO2 cathode materials for ultra-stable and high-performance aqueous zinc-ion batteries 超稳定高性能水性锌离子电池用掺杂Cu的VO2正极材料
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119210
Zihan Wang , Mengwei Chang , Heshun Geng , Peng Cui , Pengcheng Song , Fang Hu , Junhua You , Kai Zhu
{"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<sub>0.05</sub>VO<sub>2</sub> cathode material is prepared by Cu doped VO<sub>2</sub> in the tunnel to improve its electrical conductivity and weaken the electrostatic repulsion force between it and zinc ions. The Cu<sub>0.05</sub>VO<sub>2</sub> cathode can deliver a high capacity of up to 416 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup> and maintain a capacity retention rate of 95.4 % after 6000 cycles at 10 A g<sup>−1</sup>. Experimental and theoretical calculations show that both the electrical conductivity and the zinc ion transport rate are greatly enhanced in Cu<sub>0.05</sub>VO<sub>2</sub>. Therefore, the Cu<sub>0.05</sub>VO<sub>2</sub> 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}
引用次数: 0
SrSnO3/rGO/PANI ternary nanohybrid for asymmetric supercapacitor and its electrochemical performance 非对称超级电容器用SrSnO3/rGO/PANI三元纳米杂化材料及其电化学性能
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119204
Bhakti G. Thali, Dhiraj S. Agrahari, Chhaya H. Medar, Rajesh M. Kamble
{"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 SrSnO<sub>3</sub>/rGO/PANI nanohybrid. The synthesized novel SrSnO<sub>3</sub>/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 SrSnO<sub>3</sub>/rGO/PANI Nanocomposite (NC) demonstrates remarkable energy storage characteristics with an enhanced specific capacitance (C<sub>s</sub>) of 1003.26 F/g and specific capacity (C<sub>sp</sub>) value of 239.67 mAh/g at a current density of 1 A/g on three–electrode testing. Additionally, SrSnO<sub>3</sub>/rGO/PANI//AC ASC device demonstrated C<sub>s</sub> 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, SrSnO<sub>3</sub>/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}
引用次数: 0
Dual-Channel electrochemiluminescence mechanism and bioanalysis of semiconductor solar cell material Cu2ZnSnS4 半导体太阳能电池材料Cu2ZnSnS4的双通道电化学发光机理及生物分析
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119207
Yan Liu , Xue Han , Guiqun Huang , Mingzhu Deng , Mingyu Zhong , Mengli Li , Yuqi Zhang , Jia Zhang , Yijia Zhang , Xiangkai Li , Shutian Gan , Yang Wang , Zheng Xu , Li Mi , Yonghong Hu , Meng Yang , Yinzhu Wang
{"title":"Dual-Channel electrochemiluminescence mechanism and bioanalysis of semiconductor solar cell material Cu2ZnSnS4","authors":"Yan Liu ,&nbsp;Xue Han ,&nbsp;Guiqun Huang ,&nbsp;Mingzhu Deng ,&nbsp;Mingyu Zhong ,&nbsp;Mengli Li ,&nbsp;Yuqi Zhang ,&nbsp;Jia Zhang ,&nbsp;Yijia Zhang ,&nbsp;Xiangkai Li ,&nbsp;Shutian Gan ,&nbsp;Yang Wang ,&nbsp;Zheng Xu ,&nbsp;Li Mi ,&nbsp;Yonghong Hu ,&nbsp;Meng Yang ,&nbsp;Yinzhu Wang","doi":"10.1016/j.jelechem.2025.119207","DOIUrl":"10.1016/j.jelechem.2025.119207","url":null,"abstract":"<div><div>This study involved the synthesis of Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) <em>via</em> a high-temperature liquid-phase strategy, followed by a comprehensive characterization of its structural and optical properties using a range of analytical techniques. The electrochemiluminescence (ECL) phenomenon of CZTS has been discovered for the first time. Moreover, the use of tripropylamine (TPrA) and persulfate (S<sub>2</sub>O<sub>8</sub><sup>2−</sup>) as co-reactants resulted in CZTS exhibiting highly efficient ECL emission at both positive and negative potentials. The sulfur vacancies in CZTS functioned as electron traps, which enhanced the adsorption and binding affinity of co-reactant radicals. This promoted the interaction between the co-reactant and the ECL emitter, reduced energy loss, and significantly improved the ECL performance of the dual co-reactant system. In light of these findings, a new ECL biosensor was developed, incorporating DNA walker technology, an FTO three-electrode system, and enzyme-free cleavage, facilitating the efficient detection of the biomarker microRNA-141 (miRNA-141). The biosensing mechanism employed a “on-off-enhance on” signal conversion strategy, showcasing remarkable detection performance for miRNAs across a concentration range of 10<sup>−16</sup> to 10<sup>−10</sup> M, with a detection limit (LOD) reaching as low as 10<sup>−16</sup> M. This study broads the potential applications of traditional semiconductor solar cell material CZTS within the field of ECL, offering a theoretical foundation for advancing ECL research and underscoring its applicability in biomedical research and clinical diagnosis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119207"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089936","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}
引用次数: 0
The influence of ZnO-modified biomass carbon doping and supporting layered double hydroxides on electrochemical performance zno改性生物质碳掺杂及支撑层状双氢氧化物对电化学性能的影响
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119201
Ying Huang, Yan Gao, Jingyi Wu, Meng Zong
{"title":"The influence of ZnO-modified biomass carbon doping and supporting layered double hydroxides on electrochemical performance","authors":"Ying Huang,&nbsp;Yan Gao,&nbsp;Jingyi Wu,&nbsp;Meng Zong","doi":"10.1016/j.jelechem.2025.119201","DOIUrl":"10.1016/j.jelechem.2025.119201","url":null,"abstract":"<div><div>Supercapacitors are highly advantageous power-type energy storage devices. With the continuous development of wearable electronic devices, there is an urgent need to manufacture supercapacitor electrodes with high energy density, flexibility and light weight through simple technologies. In this study, N-doped carbon nanofibers (NCNF) served as a self-supporting substrate. Flexible electrodes were fabricated by coating a mixture of ZnO-modified biochar spheres (BC@ZO) and NiCo-Layered Double Hydroxide (NiCo-LDH) on the NCNF film (NCNF/BC@ZO/NiCo-LDH). The specific capacitance of the electrode reached 697 F g<sup>−1</sup> and retained 80.7 % of its initial value after 10,000 charge-discharge cycles. Meanwhile, the specific capacitance of NCNF was 224 F g<sup>−1</sup>. By combining NCNF/BC@ZO/NiCo-LDH and NCNF, a flexible asymmetric supercapacitor was constructed. The supercapacitor exhibited an specific capacitance of the supercapacitor reached 67 F g<sup>−1</sup> and retained 80 % of its capacitance after 8000 cycles. After calculation, the energy density reaches 21 Wh kg<sup>−1</sup> at a power density of 757.1 W kg<sup>−1</sup>. The addition of ZnO-modified biomass carbon has solved the problems of easy agglomeration and poor electrical conductivity of LDH, opening up a new path for the research and development of high-performance supercapacitor electrodes, but also has important practical application value due to its simple preparation method and the easy accessibility of raw materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119201"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123182","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}
引用次数: 0
Edge-N-doped porous graphitic carbon as platinum-based catalyst support for alkaline hydrogen evolution reaction 边氮掺杂多孔石墨碳作为碱性析氢反应铂基催化剂载体
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119205
Shaopeng Huang , Baodong Du , Houmao Chen , Wende Lai , Xianyou Luo , De Li , Yong Chen
{"title":"Edge-N-doped porous graphitic carbon as platinum-based catalyst support for alkaline hydrogen evolution reaction","authors":"Shaopeng Huang ,&nbsp;Baodong Du ,&nbsp;Houmao Chen ,&nbsp;Wende Lai ,&nbsp;Xianyou Luo ,&nbsp;De Li ,&nbsp;Yong Chen","doi":"10.1016/j.jelechem.2025.119205","DOIUrl":"10.1016/j.jelechem.2025.119205","url":null,"abstract":"<div><div>Graphitic carbons are commonly used as supports for electrocatalysts. However, due to their inherent lack of active sites and surface functional groups, graphitic carbon often causes significant aggregation and migration of Pt particles when used as a support for Pt/C catalysts, resulting in decreased activity and stability during the alkaline hydrogen evolution reaction (HER) process. In this study, graphite was first etched with NaOH, followed by reaction with melamine to synthesize edge-N-doped porous graphitic carbon (NPGC) as a support for Pt-based catalysts. The porous structure and edge-N doping promote the dispersion and anchoring of Pt species, while also contributing to the reduction in Pt nanoparticle size. Consequently, the Pt/NPGC catalyst demonstrated a low overpotential of 43 mV at 10 mA·cm<sup>−2</sup>, outperforming the unmodified Pt/GC (102 mV) and NaOH-etched Pt/PGC (49.7 mV), thus demonstrating superior HER activity. Additionally, the stability test results confirmed the exceptional stability of the Pt/NPGC catalyst. This study provides valuable insights into the design and fabrication of efficient graphitic carbon-supported Pt-based catalysts for potential applications in future hydrogen energy technologies.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119205"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072162","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}
引用次数: 0
In-situ synthesis of Zn ion-implanted ZIF-67-derived sulfide CoS2 for advanced supercapacitor applications 原位合成Zn离子注入zif -67衍生硫化物CoS2用于高级超级电容器
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-16 DOI: 10.1016/j.jelechem.2025.119203
Kaiyu Wang , Zhichao Xu , Wenchong Ouyang , Zhengwei Wu , Fan Zhou
{"title":"In-situ synthesis of Zn ion-implanted ZIF-67-derived sulfide CoS2 for advanced supercapacitor applications","authors":"Kaiyu Wang ,&nbsp;Zhichao Xu ,&nbsp;Wenchong Ouyang ,&nbsp;Zhengwei Wu ,&nbsp;Fan Zhou","doi":"10.1016/j.jelechem.2025.119203","DOIUrl":"10.1016/j.jelechem.2025.119203","url":null,"abstract":"<div><div>Ion implantation is a highly effective and non-destructive method for doping materials, enabling the precise control of elemental dosage without forming undesirable by-products. It also serves as a ponent for inducing crystal defects, including dislocations and vacancies, as well as ion implantation. ZIF-67, a metal-organic structure material, is regarded as superior supercapacitor electrode material due to its remarkable tunability, porosity, and chemical stability. In this study, ZIF-67 was synthesized onto nickel foam through an in-situ synthesis approach, followed by its conversion into CoS<sub>2</sub>, a transition metal sulfide, via a hydrothermal method. Subsequently, ion implantation was incorporated into the CoS<sub>2</sub> material, with Zn ions being introduced to forge a high-performance Zn<sub>1000</sub>-CoS<sub>2</sub> supercapacitor electrode. The resultant electrode showed a remarkable specific performance of 1212 F/g. Our investigation further unveiled that the asymmetric supercapacitor, employing this electrode, showed a peak energy content of 19.14 Wh/kg within 750 W/kg, with the capability to attain a power density as high as 7500 W/kg. This underscores its promising potential for practical applications. This impressive performance can be due to its cycling stability, 83 % capacity retention after 4000 cycles with a measurement rate of 20 mV/s, and successful integration into an asymmetric supercapacitor configuration.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119203"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107444","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}
引用次数: 0
Preparation of mesoporous hard carbon anode materials by nitrogen doping of biomass to enhance the specific capacity of sodium ion adsorption 生物质氮掺杂制备中孔硬碳负极材料,提高钠离子吸附比容量
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-15 DOI: 10.1016/j.jelechem.2025.119190
Wei Meng, Yinyi Gao, Kai Zhu, Dianxue Cao
{"title":"Preparation of mesoporous hard carbon anode materials by nitrogen doping of biomass to enhance the specific capacity of sodium ion adsorption","authors":"Wei Meng,&nbsp;Yinyi Gao,&nbsp;Kai Zhu,&nbsp;Dianxue Cao","doi":"10.1016/j.jelechem.2025.119190","DOIUrl":"10.1016/j.jelechem.2025.119190","url":null,"abstract":"<div><div>This study synthesized a hard carbon anode material (HC-N1300) with hierarchical micro/mesoporous structure through biomass-derived nitrogen doping, aiming to explore its application in sodium-ion batteries (SIB). Structural characterization reveals that HC-N1300 possesses well-developed micro/mesopores, which significantly shorten the diffusion pathways for sodium ions (Na<sup>+</sup>). Compositional analysis further demonstrates an increased ratio of pyridinic-N to pyrrolic-N configurations, providing abundant electrochemically active sites. These synergistic structural and compositional advantages collectively enhance the adsorption capability in the slope region. In half-cell evaluations, the HC-N1300 delivered an initial discharge capacity of 486 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> with a reversible capacity of 330 mAh g<sup>−1</sup>. Remarkably, it maintained 88.5 % capacity retention after 1000 cycles at 0.5 A g<sup>−1</sup>. Mechanistic analysis revealed that nitrogen doping plays a crucial role in pore formation during carbonization. The hierarchical porous architecture not only increases active sites but also facilitates rapid Na<sup>+</sup> diffusion, thereby effectively improving both plateau capacity and rate capability. This work provides valuable insights for designing high-performance anode materials for SIB.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119190"},"PeriodicalIF":4.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083815","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}
引用次数: 0
Amorphous-adjustable fluorinated Ni-based MOFs for enhanced alkaline oxygen evolution 用于增强碱性析氧的非晶可调氟化镍基mof
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2025-05-15 DOI: 10.1016/j.jelechem.2025.119202
Honghao Zhong, Mohan Luo, Luping Wu, Ke Yang, Ruishi Xie, Yuanli Li
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