ChemElectroChem最新文献_第9页

Fabrication of Free-Standing Hybrid Composite High Capacity Cathodes for Li−S Batteries with Nickel Oxide Polysulfide Adsorbent

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202400589

Cem Adalı, Hilal Günsel

{"title":"Fabrication of Free-Standing Hybrid Composite High Capacity Cathodes for Li−S Batteries with Nickel Oxide Polysulfide Adsorbent","authors":"Cem Adalı, Hilal Günsel","doi":"10.1002/celc.202400589","DOIUrl":"https://doi.org/10.1002/celc.202400589","url":null,"abstract":"This study focuses on enhancing lithium-sulfur (Li−S) battery performance by using nickel(II) oxide (NiO), as polysulfide adsorbent to mitigate the shuttle effect. Polysulfides have been shown to effectively adsorb onto the hydrophilic surfaces of polar metal oxides and thus suppress this effect. In this work, a NiO – reduced Graphene Oxide/Sulfur (NiO-rGO/S) hybrid composite paper was developed for use as a binder-free, flexible cathode. The characterization of the composite films was done through Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetric analysis (TG), field emission gun scanning electron microscopy (FEG-SEM), energy dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD). To test adsorption of polysulfides by NiO, ultraviolet-visible (UV-Vis) spectroscopy was applied. Electrochemical performance tests of CR2032 cells were also conducted by cyclic voltammetry (CV), charge-discharge tests, electrochemical impedance spectroscopy (EIS). The NiO-rGO/S cathode, particularly the one containing 2 % NiO, exhibited remarkable performance. It delivered an initial discharge capacity of 1230 mAh g−1, maintaining 1029 mAh g−1 after 300 cycles, with a high capacity retention of 83.1 %. This suggests that the NiO-rGO/S hybrid composite is a promising candidate for improving the efficiency and lifespan of Li−S batteries.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400589","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Front Cover: Electrocatalytic Performance and Kinetic Behavior of Anion-Intercalated Borate-Based NiFe LDH in Alkaline OER (ChemElectroChem 22/2024) 封面：碱性 OER 中阴离子钙化硼酸盐基镍铁 LDH 的电催化性能和动力学行为（ChemElectroChem 22/2024）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202482201

Maike Berger, Alexandra Markus, Stefan Palkovits, Prof. Regina Palkovits

引用次数: 0

Electro-Oxidative Extraction of Methanol from Lignin Using a Three-Dimensional Graphite Anode

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202400464

Zichun Xiong, Kazuyo Kobayashi, Aki Miyawaki, Shinya Teranishi, Yoshiharu Sawada, Takashi Hibino

{"title":"Electro-Oxidative Extraction of Methanol from Lignin Using a Three-Dimensional Graphite Anode","authors":"Zichun Xiong, Kazuyo Kobayashi, Aki Miyawaki, Shinya Teranishi, Yoshiharu Sawada, Takashi Hibino","doi":"10.1002/celc.202400464","DOIUrl":"https://doi.org/10.1002/celc.202400464","url":null,"abstract":"This paper reports an electrochemical approach that uses lignin as a resource for renewable and sustainable methanol production. The aromatic rings of lignin have methoxy substituents, which can be oxidatively demethylated to methanol by active oxygen produced at the anode. A graphite electrode fabricated in a sponge form provided sufficient reaction space for the lignin feedstock, efficiently generated active oxygen species from water, and considerably suppressed the overoxidation of methanol to carbon dioxide. As a result, the methanol yield reached approximately 70 % at a temperature of 75 °C, atmospheric pressure, and anode potential of +0.57 V. Another advantage of this technique is that hydrogen evolution reaction (HER) occurred at the cathode and the cathode potential was held at approximately −0.5 V during the HER. Therefore, the cell voltage required for lignin electrolysis was 1.1 V or lower, which means that hydrogen as well as methanol was produced under mild conditions.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400464","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocatalytic Performance and Kinetic Behavior of Anion-Intercalated Borate-Based NiFe LDH in Alkaline OER 阴离子钝化硼酸盐基镍铁 LDH 在碱性 OER 中的电催化性能和动力学行为

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202400457

Maike Berger, Alexandra Markus, Stefan Palkovits, Prof. Regina Palkovits

{"title":"Electrocatalytic Performance and Kinetic Behavior of Anion-Intercalated Borate-Based NiFe LDH in Alkaline OER","authors":"Maike Berger, Alexandra Markus, Stefan Palkovits, Prof. Regina Palkovits","doi":"10.1002/celc.202400457","DOIUrl":"https://doi.org/10.1002/celc.202400457","url":null,"abstract":"The synthesis of hydrogen via water electrolysis is an important step towards resolving the energy crisis and impeding global warming, as hydrogen can be used as a green energy carrier. The oxygen evolution as one half-cell reaction (OER) is currently limiting efficient water splitting due to kinetic inhibition as well as a complex mechanism, causing a large overpotential. Nickel-iron layered double hydroxides (LDH) were found to be suitable OER catalysts, as they are cost effective, stable and highly active. This work focuses on the intercalation of different organic and inorganic borates into the LDH interlayers to study their influence on OER. Besides activity and stability measurements, three borate candidates were chosen for a kinetic study, including steady-state Tafel analysis and reaction order plots. It was found that the Bockris pathway with the second step as rate-determining step was predominant for all three catalysts. Of all candidates, the intercalation of borate resulted in the highest performance, which was associated with a high reducibility affecting the active metal sites.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 22","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Synthesis of Purine Alkaloid Metabolites from Caffeine

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-14 DOI: 10.1002/celc.202400439

Ridho Asra, Alan M. Jones

{"title":"Electrochemical Synthesis of Purine Alkaloid Metabolites from Caffeine","authors":"Ridho Asra, Alan M. Jones","doi":"10.1002/celc.202400439","DOIUrl":"https://doi.org/10.1002/celc.202400439","url":null,"abstract":"The development of electrochemical approaches to the valorization of abundant natural products into high value medications and metabolites is of pharmaceutical interest. In this study, we explored the electrosynthetic behavior of the abundant legal psychoactive, caffeine, a representative member of the purine alkaloid class. Initial screening of the cyclic voltammetric behavior of eleven exemplar purine alkaloids revealed a structure electroactivity relationship (SeAR) for determining the initial oxidation site of caffeine. Optimization of the current controlled electrochemical (CCE) reaction enabled the dialing-in/out of differential oxidative metabolic products using both undivided and divided cells. Sequential desmethylation around the purine ring was observed both by isolation and comparison to authentic metabolite reference standards via HPLC measurements. Amide, imide, and a novel N-methyl heteroaryl oxidation mechanism were observed. Tractable quantities of the high-value medication, theophylline, and the dietary supplement, paraxanthine, were isolated in 17 % and 8 % b.r.s.m. This approach offers a marked improvement compared to the best-in-class techniques (chemical 0.8 % and enzymatic 0.97 % yields) and may have potential in other natural product and drug discovery settings to prepare valuable metabolites.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 24","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Advances in Non-Carbon Dense Sulfur Cathodes for Lithium–Sulfur Battery with High Energy Density

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-13 DOI: 10.1002/celc.202400481

Viet Phuong Nguyen, Seung-Mo Lee

{"title":"Recent Advances in Non-Carbon Dense Sulfur Cathodes for Lithium–Sulfur Battery with High Energy Density","authors":"Viet Phuong Nguyen, Seung-Mo Lee","doi":"10.1002/celc.202400481","DOIUrl":"https://doi.org/10.1002/celc.202400481","url":null,"abstract":"The seemingly advantageous features of carbon-based materials, such as large pore volume and lightweight structure, could actually lead to low tap density for the sulfur cathode and excessive electrolyte consumption, potentially significantly decreasing the energy density of lithium–sulfur battery. Recently, non-carbon-based materials composed of inorganic matter have emerged as promising candidates for creating dense sulfur cathodes and reducing electrolyte intake. Additionally, inorganic matter exhibits strong interactions with lithium polysulfides, which can address the intrinsic problems of the severe shuttling effect and poor reaction kinetics. In this review, we first discuss the relationship between the tap density of the sulfur cathode and the energy density of lithium–sulfur battery. Subsequently, we systematically summarize recent advances in non-carbon-based materials as sulfur hosts. Finally, we propose future research directions and perspectives for sulfur host materials to inspire the realization of practical lithium–sulfur battery with high energy density.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 24","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cation Effect of Bio-Ionic Liquid-Based Electrolytes on the Performance of Zn-Ion Capacitors

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-13 DOI: 10.1002/celc.202400511

Sumana Brahma, Jonathan Huddleston, Abhishek Lahiri

{"title":"Cation Effect of Bio-Ionic Liquid-Based Electrolytes on the Performance of Zn-Ion Capacitors","authors":"Sumana Brahma, Jonathan Huddleston, Abhishek Lahiri","doi":"10.1002/celc.202400511","DOIUrl":"https://doi.org/10.1002/celc.202400511","url":null,"abstract":"Zn-ion capacitors (ZICs) are emerging as promising energy storage devices due to their low cost. Currently, aqueous-based electrolytes are primarily used in ZIC which have shown issues related to low Zn deposition/stripping efficiencies, and Zn dendrites formation, resulting in device failure. To overcome these issues and to develop environmentally benign energy storage devices, here we have studied bio-ionic liquid electrolytes (bio-ILs) in both symmetric and asymmetric capacitors. Choline acetate (ChOAc) and betaine acetate (BetOAc) in water were investigated as electrolytes for capacitors in the presence and absence of Zn salts. Spectroscopic analysis showed that Zn solvation in the electrolytes changes significantly with the change in cation which affects the electrochemical reactions and capacitor performance. Raman analysis showed the Zn complex formed in the case of ChOAc is [Zn(OAc)4]2− whereas for BetOAc is [Zn(OAc)5]3− thereby the Zn deposition/stripping in ChOAc-based electrolyte is quite stable whereas in case of BetOAc, Zn deposition/stripping is unstable. In the ChOAc electrolyte, the Zn/activated carbon asymmetric cell showed a capacity of >90 F g−1 at 0.1 A g−1 and a capacitance close to 40 F g−1 at 0.5 A g−1 with ∼82 % capacity retention after 3000 cycles, whereas BetOAc could only be used in symmetric cell capacitor. This study shows that bio-ILs can be used as sustainable electrolytes in energy storage devices wherein the cation plays a significant role in the capacitor performance.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 24","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400511","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of MoS₂/Graphene Hetero-Film Photocatalyst and Li-Oxygen Battery Application

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-13 DOI: 10.1002/celc.202400577

Ali Can Çelt, Meltem Çayirli, Reşat Can Özden, Ersu Lökçü, Mustafa Anik

引用次数: 0

Front Cover: High-performance Porous Electrodes for Flow Batteries: Improvements of Specific Surface Areas and Reaction Kinetics (ChemElectroChem 21/2024) 封面：用于液流电池的高性能多孔电极：比表面积和反应动力学的改进（ChemElectroChem 21/2024）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-07 DOI: 10.1002/celc.202482101

Lyuming Pan, Zixiao Guo, Hucheng Li, Yilin Wang, Haoyao Rao, Qinping Jian, Jing Sun, Jiayou Ren, Zhenyu Wang, Bin Liu, Meisheng Han, Yubai Li, Xinzhuang Fan, Wenjia Li, Lei Wei

引用次数: 0

Cover Feature: Cost-Effective Solutions for Lithium-Ion Battery Manufacturing: Comparative Analysis of Olefine and Rubber-Based Alternative Binders for High-Energy Ni-Rich NCM Cathodes (ChemElectroChem 21/2024) 封面专题：锂离子电池制造的成本效益解决方案：用于高能量富镍 NCM 阴极的烯烃基和橡胶基替代粘合剂的比较分析（ChemElectroChem 21/2024）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-07 DOI: 10.1002/celc.202482102

Susan Montes, Alexander Beutl, Andrea Paolella, Marcus Jahn, Artur Tron

引用次数: 0