Journal of Electroanalytical Chemistry最新文献_第9页

Defects-engineered build in a Molecule-Based trinuclear iron cluster material as anode materials for lithium-ion batteries

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-04 DOI: 10.1016/j.jelechem.2025.118990

Qing Zeng , Hualing Tian , Yang Zhang , Yanjun Cai , Qingrong Kong , Zhi Su

{"title":"Defects-engineered build in a Molecule-Based trinuclear iron cluster material as anode materials for lithium-ion batteries","authors":"Qing Zeng , Hualing Tian , Yang Zhang , Yanjun Cai , Qingrong Kong , Zhi Su","doi":"10.1016/j.jelechem.2025.118990","DOIUrl":"10.1016/j.jelechem.2025.118990","url":null,"abstract":"<div><div>The design of electrode materials for rechargeable batteries is crucial in advancing renewable energy technologies. Herein, a defect engineering strategy is proposed to introduce point defects, providing extra Li storage sites and improving the intrinsic electron/ion transfer rate and reaction kinetics in the [Fe<sub>3</sub>O(CH<sub>3</sub>COO)<sub>6</sub>(H<sub>2</sub>O)<sub>3</sub>] cluster (referred to as Fe<sub>3</sub>). Theoretical calculations revealed that heteroatom doping decreases the band gap of [Fe<sub>2.985</sub>Mn<sub>0.015</sub>O(CH<sub>3</sub>COO)<sub>6</sub>(H<sub>2</sub>O)<sub>3</sub>] (designated as Fe<sub>2.985</sub>-Mn<sub>0.015</sub>), induces greater redox activity, and results in higher conductivity. The Fe<sub>2.985</sub>-Mn<sub>0.015</sub> material shows a superior rate capability and a high specific capacity of 1071.9 mAh g<sup>−1</sup> after 200 cycles at a current density of 0.1 A/g when used as an anode in lithium-ion batteries (LIBs). The exceptional electrochemical performance is attributed to the activated Li reaction involving mixed valence metals and –COO<sup>−</sup> groups, as evidenced by ex situ X-ray photoelectron spectroscopy, ex situ Fourier transform infrared spectroscopy, and in situ electrochemical impedance measurements. Additionally, the improvement in the electrochemical performance indicates that electron redistribution after Mn<sup>2+</sup> doping significantly contributes to increased reaction kinetics. This research opens new possibilities for designing molecule-based materials with structural defects and superior performance in anode material applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118990"},"PeriodicalIF":4.1,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349805","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

Star-shaped ZIF-derived carbon-based electrocatalysts with FeNX active sites for enhanced oxygen reduction reaction in high-performance zinc-air batteries

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-04 DOI: 10.1016/j.jelechem.2025.118991

Shuo Tian , Shang Wu , Jincai Yang , Jiankun Li , Chaoyang Liu , Jiali Shi , Xiaoming Xiang , Lihong Wang , Yuzhi Sun , Quanlu Yang

{"title":"Star-shaped ZIF-derived carbon-based electrocatalysts with FeNX active sites for enhanced oxygen reduction reaction in high-performance zinc-air batteries","authors":"Shuo Tian , Shang Wu , Jincai Yang , Jiankun Li , Chaoyang Liu , Jiali Shi , Xiaoming Xiang , Lihong Wang , Yuzhi Sun , Quanlu Yang","doi":"10.1016/j.jelechem.2025.118991","DOIUrl":"10.1016/j.jelechem.2025.118991","url":null,"abstract":"<div><div>A star-shaped Oxygen reduction reaction (ORR) catalyst, Fe-NSC-2, with the growth of carbon nanotubes is prepared. Nitrogen-rich iron phthalocyanine (FePc) is successfully doped into a zeolite imidazolate framework (ZIF-8) by the grinding and pyrolysis methods. Doping FePc into ZIF-8, utilizing its nitrogen ligands and macrocyclic structure, enhances metal dispersion and reinforces the metal-nitrogen (Fe-N<sub>X</sub>) configuration. Additionally, this arrangement promotes the graphitization of the three-dimensional porous carbon following pyrolysis. Unexpectedly, the synthesized Fe-NSC-2 catalyst is found to exhibit excellent ORR electrocatalytic activity in alkaline solutions compared to Pt/C. The Zinc-air batteries (ZAB), in which Fe-NSC-2 is employed as the air cathode, is found to exhibit remarkable performance and stability. This provides an economically viable preparation strategy for exploring efficient catalysts for the ORR.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118991"},"PeriodicalIF":4.1,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143306760","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

Engineered controlled on the synthesis of bismuth-molybdenum oxide semiconductors tailors photoelectrocatalytic activity

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-02 DOI: 10.1016/j.jelechem.2025.118956

Alejandro Aranda-Aguirre , Daniel Valdivia-Alvarez , Elizabeth C. Pastrana , Sergi Garcia-Segura , Gabriel A. Cerrón-Calle , Hugo Alarcon

{"title":"Engineered controlled on the synthesis of bismuth-molybdenum oxide semiconductors tailors photoelectrocatalytic activity","authors":"Alejandro Aranda-Aguirre , Daniel Valdivia-Alvarez , Elizabeth C. Pastrana , Sergi Garcia-Segura , Gabriel A. Cerrón-Calle , Hugo Alarcon","doi":"10.1016/j.jelechem.2025.118956","DOIUrl":"10.1016/j.jelechem.2025.118956","url":null,"abstract":"<div><div>The engineered fabrication of Bi<sub>2</sub>MoO<sub>6</sub> thin-films enables controlled modification of photoelectrocatalytic responses based on the synthesis method. Using a modified Pechini auto-combustion method, which involves the formation of stable chelates between mixed metal ions and citric acid, the photoelectrochemical performance of Bi<sub>2</sub>MoO<sub>6</sub> can be tuned by varying the synthesis components. This study elucidates the impacts of HNO<sub>3</sub>, NH<sub>3</sub>, and Bi<sup>3+</sup> concentrations during the manufacturing of Bi<sub>2</sub>MoO<sub>6</sub> thin layers. The concentration of HNO<sub>3</sub> was critical for the formation of a high-purity crystallographic phase. Adding NH<sub>3</sub> enhanced photoelectrochemical responses due to its thermal effect during combustion, resulting from crosslinking between metal-citrate complexes. Additionally, the photocurrent response under applied potential and light irradiation (λ = 365 nm) could be tuned by adjusting the stoichiometry between Bi<sup>3+</sup> and Mo<sup>6+</sup>. The optimal Bi<sup>3+</sup>:Mo<sup>6+</sup> ratio resulted in the maximum photocurrent of 0.65 mA cm<sup>-</sup><sup>2</sup> at 0.61 V vs Ag/AgCl (1.23 V vs RHE) and lowest charge transfer resistance value of 0.8 kΩ when evaluated in the presence of hole-scavenger species. This study provides an understanding into the role of each synthesis component and highlights the importance of optimizing synthesis procedures to achieve higher photoelectrochemical performance in thin-film catalysts.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118956"},"PeriodicalIF":4.1,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143354640","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

High-performance aqueous zinc-ion batteries enabled by graphene electrode modified with multiple redox polymer

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-02 DOI: 10.1016/j.jelechem.2025.118962

Cuihong Zhang , Yang Luo , Shilong Chang , Jianping Wu , Peng Zhang , Fu-Gang Zhao

{"title":"High-performance aqueous zinc-ion batteries enabled by graphene electrode modified with multiple redox polymer","authors":"Cuihong Zhang , Yang Luo , Shilong Chang , Jianping Wu , Peng Zhang , Fu-Gang Zhao","doi":"10.1016/j.jelechem.2025.118962","DOIUrl":"10.1016/j.jelechem.2025.118962","url":null,"abstract":"<div><div>In this work, a novel conductive polymer material—polyaminohydroquinone dimethylether (polyAHQDME)—was in-situ synthesized and grafted onto reduced graphene oxide (rGO) to yield polyAHQDME-rGO composite electrode for aqueous zinc-ion batteries (AZIBs). Various characterization techniques, including scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and Raman spectroscopy, were employed to collect the structural and morphological information. Due to redox reactions between quinone and imine transformation, electrochemical test demonstrated that polyAHQDME-rGO electrode achieved a high capacity of up to 242.8 mAh/g at 0.2 A/g, and maintained excellent stability at high current densities. Meanwhile, polyAHQDME-rGO material exhibited rate capability and cycling stability. Electrochemical impedance spectroscopy showed conductive polyAHQDME chain favored electron migration and zinc ion transfer. This study provided new insights and tactics for developing high-performance cathode materials for aqueous zinc-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"981 ","pages":"Article 118962"},"PeriodicalIF":4.1,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096666","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

Three-dimensional “skin-core” structures of FeCe co-doped PPy@FCC-ZIF by in-situ ion exchange etching to used stabilize water electrolysis in high current density

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118891

Wenjun Zhang , Xiaohui He , Quan Li , Ling Feng , Xiaolin Cao , Defu Chen

{"title":"Three-dimensional “skin-core” structures of FeCe co-doped PPy@FCC-ZIF by in-situ ion exchange etching to used stabilize water electrolysis in high current density","authors":"Wenjun Zhang , Xiaohui He , Quan Li , Ling Feng , Xiaolin Cao , Defu Chen","doi":"10.1016/j.jelechem.2024.118891","DOIUrl":"10.1016/j.jelechem.2024.118891","url":null,"abstract":"<div><div>As an effective energy storage medium, hydrogen can store large-scale energy. At the same time, hydrogen energy solves the problem of renewable energy volatility and promotes the balanced allocation of energy. In all the hydrogen production methods, the use of electricity to drive water decomposition to produce hydrogen is a sustainable solution. In this paper, using PPy as the active intermediate layer, composite nanoarray electrocatalyst with three-dimensional “skin core” structure was prepared by in-situ growth of Co-ZIF and ion exchange etching of Fe and Ce elements. Among them, the existence of PPy can provide an active site for the growth of Co-ZIF, which improves the unstable situation of electrolysis of self-supporting catalyst based on nanosheet structure under high current density. In addition, the co-doping of Fe and Ce improved the electric field structure of Co-ZIF nanosheets and increased the catalytic activity of the catalyst. The prepared PPy@FCC-ZIF/NF catalysts have a low overpotential of 260 mV, 299 mV and 383 mV at current densities of 50, 200 and 500 mA cm<sup>−2</sup>, respectively. Even at the high current density of 1 A cm<sup>−2</sup>, the overpotential is only 440 mV. In addition, the electrolytic water system with PPy@FCC-ZIF/NF as anode exhibited stable electrolytic behavior. When using Pt/C as the cathode, the device can electrolysis 125 h with a stable working voltage of 1.70 V at 50 mA cm<sup>−2</sup>. When the commercial NiMo/NF catalyst is used as the cathode, it can be stably electrolyzed for 60 h at a high current density of 500 mA cm<sup>−2</sup>. This study provides the idea for the research of advanced three-dimensional self-supported electrocatalysts and the possibility for the construction of new commercial electrocatalysts.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118891"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101483","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

Solvent permeation triggers polymetallic gel for highly efficient oxygen evolution reaction

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118904

Qi Xue , Long Ma , Kun Liu , Pengpeng Du , Qiufang Liu , Yan Yan , Yuan Dang , Shuangli Chen , Shao-Hua Wen , Yuanzhen Zhou

{"title":"Solvent permeation triggers polymetallic gel for highly efficient oxygen evolution reaction","authors":"Qi Xue , Long Ma , Kun Liu , Pengpeng Du , Qiufang Liu , Yan Yan , Yuan Dang , Shuangli Chen , Shao-Hua Wen , Yuanzhen Zhou","doi":"10.1016/j.jelechem.2024.118904","DOIUrl":"10.1016/j.jelechem.2024.118904","url":null,"abstract":"<div><div>Developing highly effective, low-cost and high-yield electrocatalysts is critical but challenging for oxygen evolution reaction (OER) in electrochemical water splitting. Metal-organic gels (MOGs) have appeared as candidates with great promise due to their unique structural characteristics. Herein, a series of efficient and stable FeCo bimetal and FeCoNi multi-component gel electrocatalysts (Fe<sub>m</sub>CoNi<sub>n</sub>-MOGs) were constructed via a penetration strategy of propylene oxide-triggered gelation. Among them, Fe<sub>2</sub>CoNi-MOGs with the optimal molar ratio display significant OER activity, with an ultra-low overpotential of 268 mV at 10 mA cm<sup>−2</sup> current density and long-term stability of more than 15 h, far exceeding commercial RuO<sub>2</sub>. The multi-component metal gels exhibit a unique three-dimensional porous cross-linked network structure, resulting in a large specific surface area. Moreover, the synergetic effect between multi-components effectively modifies the electronic structure of the surface of Fe<sub>2</sub>CoNi-MOGs, which promotes their performances. This work contributes to the understanding of multi-metal electrocatalyst in accelerating the OER process of electrolytic water, and expands the direction for alternatives to noble metal electrocatalysts.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118904"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092103","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

A novel Co-free high-entropy oxide (FeNiCrMnMgAl)3O4 as advanced anode material for lithium-ion batteries

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118910

Xu Guo , Ping Gu , Jingfeng Wu , Kun Li , Yongxin Liang , Guiting Wang , Zhi Zhang , Chenfeng Guo

{"title":"A novel Co-free high-entropy oxide (FeNiCrMnMgAl)3O4 as advanced anode material for lithium-ion batteries","authors":"Xu Guo , Ping Gu , Jingfeng Wu , Kun Li , Yongxin Liang , Guiting Wang , Zhi Zhang , Chenfeng Guo","doi":"10.1016/j.jelechem.2024.118910","DOIUrl":"10.1016/j.jelechem.2024.118910","url":null,"abstract":"<div><div>High-entropy oxide (HEO) is a novel type of anode material for lithium-ion batteries (LIBs), exhibiting high specific capacity and excellent cycle stability. Currently, the electrochemical research on HEOs relies on Co to achieve high capacities, however, the cost of Co may hinder the large-scale application of HEOs. In this study, a scalable high-temperature solid-state method was used to synthesize Co-free HEO (FeNiCrMnMgAl)<sub>3</sub>O<sub>4</sub>. The effect of sintering temperature on electrochemical performance of HEO was investigated, with results indicating that HEO-1000 demonstrated superior electrochemical performance. The HEO-1000 exhibited a high specific capacity (reaching 555.79 mAh/g under 200 mA/g), long cycling stability (after 1000 cycles at 1000 mA/g, the capacity retains at 458.75 mAh/g, achieving 90.5 % retention rate), and favorable rate capability (achieving 436.11 mAh/g under 1000 mA/g). In addition, we analyzed the structural evolution during the cycling process using <em>ex-situ</em> XPS, XRD, and TEM analyses, which indicated that partial conversion reactions occurred in the HEO during lithiation/delithiation, and the short-range ordered crystal structure was preserved. This characteristic is beneficial for enhancing the cyclability of the electrode. This research introduces a strategy to the design of high-entropy energy storage materials and provides insights for the advancement of next-generation anode materials for LIBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118910"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092124","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

Impact of compositional tuning on Ni-B electrocatalyst for efficient hydrogen evolution

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118847

Susmita S. Patil , Aasiya S. Jamadar , Rohit B. Sutar , Reshma V. Khandeker , Tukaram Dongale , Jyotiprakash B.Yadav

{"title":"Impact of compositional tuning on Ni-B electrocatalyst for efficient hydrogen evolution","authors":"Susmita S. Patil , Aasiya S. Jamadar , Rohit B. Sutar , Reshma V. Khandeker , Tukaram Dongale , Jyotiprakash B.Yadav","doi":"10.1016/j.jelechem.2024.118847","DOIUrl":"10.1016/j.jelechem.2024.118847","url":null,"abstract":"<div><div>Transition metal boride (TMB) materials have gained enormous attention as an interesting class of catalysts. The precise role of the metal-to-boron molar ratio on composite formation and its relation to electrocatalytic activity for HER is still unclear. Herein, the NiB electrode was synthesized by a varying nickel-to-boron molar ratio (1:0.5,1:1,1:1.5,1:2) using a simple and low-cost chemical bath deposition technique. The change in molar ratio influences NiB electrode structural composition, electrocatalytic activity, and the onsite rate of hydrogen production. An insightful compositional variation was interpreted from the XPS study. It reveals that only the NiB3 electrode (Ni-B with molar ratio 1:1.5) exhibited the pure form of NiB in the core and partially oxidized layer on the surface. In the other electrodes, partially oxidized NiB in the core and a completely oxidized layer on the surface were observed. The synergic effect of pure and partially oxidized NiB phase composition enhanced the HER performance. It delivered a low overpotential of 57 mV at 10 mA/cm<sup>2</sup> and a low Tafel slope of 80 mV/dec for HER. It also exhibited the highest hydrogen production rate of 1111.4 ml/hr in a prototype water electrolyzer under an alkaline medium ever reported.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118847"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092638","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

Unleashing the electrochemical potential of NaNiFeMnO2 layered oxide cathodes through titanium and copper co-enhancement for sodium ion batteries

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118870

Safia Bibi , Ahmed Bashir , Zain Ul Abideen , Tao Chen , Dan Sun , Kaiyu Liu

{"title":"Unleashing the electrochemical potential of NaNiFeMnO2 layered oxide cathodes through titanium and copper co-enhancement for sodium ion batteries","authors":"Safia Bibi , Ahmed Bashir , Zain Ul Abideen , Tao Chen , Dan Sun , Kaiyu Liu","doi":"10.1016/j.jelechem.2024.118870","DOIUrl":"10.1016/j.jelechem.2024.118870","url":null,"abstract":"<div><div>Sodium-ion batteries hold a great importance in power storage devices due to affordable price and earth abundancy. However, the complex phase evolution during Na<sup>+</sup> ions insertion/extraction severely limits their durability and rate capability, which largely limits their practical applications. Herein, we have successfully synthesized O<sub>3</sub>-type Na<sub>1.05</sub> (Ni<sub>0.33</sub>Fe<sub>0.33</sub>Mn<sub>0.33</sub>)<sub>0.83</sub>Ti<sub>0.05</sub>Cu<sub>0.12</sub>O<sub>2</sub> (NaTiCuNFM). It was found that the as-obtained NaTiCuNFM exhibits enhanced rate performance as well as specific discharge capacity of 124.5 mAhg<sup>−1</sup> at the rate of 1C with 82 % capacity retention after 200 cycles. Besides, at high current density of 10C, the obtained NaTiCuNFM shows a high initial discharge capacity of 99 mAhg<sup>−1</sup> which was significantly higher than that of NaNFM (61 mAh/g). The higher performance of Cu/Ti co-doped NaTiCuNFM was attributed to the enhancement of inter sodium layer spacing resulting an easy migration of sodium ions, which leads to the enhanced Na<sup>+</sup> diffusion and rate performance. The co-doping of Cu/Ti has proven to provide a more stable structure. Our obtained results, will open a new window for bi-metals doped cathode materials for practical battery application.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118870"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093014","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

Enhancement of electrochemical performance in supercapacitors using TiO2 nanoparticles-doped PVA-KOH gel electrolyte

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118886

Kwanruthai Wongsaprom , Pornchita Insee , Nattarika Boonraksa , Ekaphan Swatsitang

{"title":"Enhancement of electrochemical performance in supercapacitors using TiO2 nanoparticles-doped PVA-KOH gel electrolyte","authors":"Kwanruthai Wongsaprom , Pornchita Insee , Nattarika Boonraksa , Ekaphan Swatsitang","doi":"10.1016/j.jelechem.2024.118886","DOIUrl":"10.1016/j.jelechem.2024.118886","url":null,"abstract":"<div><div>The development of PVA-KOH gel electrolytes doped with various concentrations of TiO<sub>2</sub> nanoparticles was investigated to enhance the electrochemical performance and stability of symmetric supercapacitors (SSCs). The optimized SSC, with 0.30 % TiO<sub>2</sub> doping, demonstrated superior electrochemical performance, achieving a specific capacitance of 154.33 F/g, an energy density of 23.43 Wh/kg, and power density of 1196.43 W/kg. This improvement is attributed to the ability of TiO<sub>2</sub> nanoparticles to inhibit polymer crystallization, thereby enhancing ionic conductivity and compatibility between the electrode and electrolyte. Electrochemical Impedance Spectroscopy (EIS) indicated reduced series resistance (R<sub>s</sub>) and charge transfer resistance (R<sub>ct</sub>) for the SSC with 0.30 % TiO<sub>2</sub>, with values of 0.61 Ω and 0.39 Ω, respectively. Additionally, the SSC exhibited excellent cycling stability, retaining 100 % of its capacitance after 10,000 charge–discharge cycles at a current density of 1 A/g. These results highlight the potential of TiO<sub>2</sub>-doped PVA-KOH gel electrolytes in developing high-performance, safe supercapacitors for a wide range of applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118886"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093016","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