Electrochemical science advances最新文献_第3页

Sustainable supercapacitor with a natural rubber-based electrolyte and natural graphite-based electrodes 采用天然橡胶电解质和天然石墨电极的可持续超级电容器

IF 2.9

Electrochemical science advances Pub Date : 2023-12-26 DOI: 10.1002/elsa.202300025

Kumudu S. Perera, Kamal P. Vidanapathirana, Lewis J. Adams, Nilanthy Balakrishnan

{"title":"Sustainable supercapacitor with a natural rubber-based electrolyte and natural graphite-based electrodes","authors":"Kumudu S. Perera, Kamal P. Vidanapathirana, Lewis J. Adams, Nilanthy Balakrishnan","doi":"10.1002/elsa.202300025","DOIUrl":"10.1002/elsa.202300025","url":null,"abstract":"Supercapacitors are at the forefront of energy storage devices due to their ability to fulfill quick power requirements. However, safety and cost are important parameters for their real-world applications. Green materials-based electrodes and electrolytes can make them safer and cost-effective. Herein, a supercapacitor based on a methyl-grafted natural rubber/salt-based electrolyte and natural graphite (NG)-based electrodes are fabricated and characterized. Zinc trifluoromethanesulfonate [Zn(CF3SO3)2] is used as the salt for the electrolyte. A mixture of NG, activated charcoal, and polyvinylidenefluoride is used for electrodes. Our supercapacitor shows a single electrode specific capacitance, Csc of 4.2 Fg−1 from impedance measurement. Moreover, the capacitive and resistive features are dominant at low and high frequencies, respectively. The cyclic voltammetry test shows the dependence of Csc on the scan rate with a high value at slow scan rates. Performance of the supercapacitor during 5000 charge and discharge cycles at a constant current of 90 μA shows a rapid decrease of single electrode specific discharge capacitance at the beginning, but it starts to stabilize after about 2500 cycles. These findings are relevant to further developments of green materials-based supercapacitors, offering opportunities to expand the functionalities of supercapacitors in green technologies.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 6","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139154833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical energy input efficiency limitations in CO2-to-CO electrolysis and attempts for improvement CO2 - to - CO电解中电能输入效率的限制及改进尝试

IF 2.9

Electrochemical science advances Pub Date : 2023-11-13 DOI: 10.1002/elsa.202300024

Thomas Reichbauer, Bernhard Schmid, Kim-Marie Vetter, David Reinisch, Nemanja Martić, Christian Reller, Alexander Grasruck, Romano Dorta, Günter Schmid

{"title":"Electrical energy input efficiency limitations in CO2-to-CO electrolysis and attempts for improvement","authors":"Thomas Reichbauer, Bernhard Schmid, Kim-Marie Vetter, David Reinisch, Nemanja Martić, Christian Reller, Alexander Grasruck, Romano Dorta, Günter Schmid","doi":"10.1002/elsa.202300024","DOIUrl":"10.1002/elsa.202300024","url":null,"abstract":"Electrochemical CO2 reduction is a potentially up-coming technology to convert anthropogenic emitted CO2 into chemical feedstock. Due to alkaline operating conditions of CO2-electrolyis in gas diffusion electrodes, exothermal hydroxide ion neutralization with the excess of supplied CO2 leads to unavoidable electricity-to-heat conversion at the cathode, therefore limiting electrical energy input efficiency. The decomposition reaction of carbonates by protons from water oxidation completes the inherent CO2 transport at the anode. In this work, different production routes to CO are thermodynamically examined and experimentally validated. Using formic acid as an intermediate towards CO the electrical energy input efficiency can rise to 71% on a thermodynamical basis. Additionally, the possibility of altering the mechanism of CO2 reduction under acidic conditions is investigated, which would lead to even larger electrical energy input efficiencies. The concept was investigated by pH series measurements (pH = 0–6) at 50 mA/cm2 where Pb derived from Pb3O4 was used as a CO2 reduction catalyst. The reduction to formic acid under acidic bulk electrolyte pH is stable at FEHCOOH = 70% down to pH <math>\u0000 <semantics>\u0000 <mo>≈</mo>\u0000 <annotation>$ approx $</annotation>\u0000 </semantics></math> 1, while HER is becoming dominant below. Even under such acidic bulk electrolyte conditions no change in reduction mechanism could be forced, which is reflected in invariant cell voltages in the model experiment.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 6","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136351807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Through the interface: New insights of the hydrogen evolution and oxidation reactions in aqueous solutions 穿越界面：水溶液中氢进化和氧化反应的新见解

Electrochemical science advances Pub Date : 2023-10-30 DOI: 10.1002/elsa.202300016

Ershuai Liu, Li Jiao, Qingying Jia, Sanjeev Mukerjee

引用次数: 0

Investigation of physicochemical drivers directing ionic liquid assembly on polymeric nanoparticles 高分子纳米粒子上离子液体组装的物理化学驱动因素研究

IF 2.9

Electrochemical science advances Pub Date : 2023-10-04 DOI: 10.1002/elsa.202300013

Sara X. Edgecomb, Christine M. Hamadani, Angela Roberts, George Taylor, Anya Merrell, Ember Suh, Mahesh Loku Yaddehige, Indika Chandrasiri, Davita L. Watkins, Eden E. L. Tanner

{"title":"Investigation of physicochemical drivers directing ionic liquid assembly on polymeric nanoparticles","authors":"Sara X. Edgecomb, Christine M. Hamadani, Angela Roberts, George Taylor, Anya Merrell, Ember Suh, Mahesh Loku Yaddehige, Indika Chandrasiri, Davita L. Watkins, Eden E. L. Tanner","doi":"10.1002/elsa.202300013","DOIUrl":"10.1002/elsa.202300013","url":null,"abstract":"Ionic liquids (ILs) have emerged as promising biomaterials for enhancing drug delivery by functionalizing polymeric nanoparticles (NPs). Despite the biocompatibility and biofunctionalization they confer upon the NPs, little is understood regarding the degree in which non-covalent interactions, particularly hydrogen bonding and electrostatic interactions, govern IL-NP supramolecular assembly. Herein, we use salt (0-1 M sodium sulfate) and acid (0.25 M hydrochloric acid at pH 4.8) titrations to disrupt IL-functionalized nanoassembly for four different polymeric platforms during synthesis. Through quantitative 1H-nuclear magnetic resonance spectroscopy and dynamic light scattering, we demonstrate that the driving force of choline trans-2-hexenoate (CA2HA 1:1) IL assembly varies with either hydrogen bonding or electrostatics dominating, depending on the structure of the polymeric platform. In particular, the covalently bound or branched 50:50 block co-polymer systems (diblock PEG-PLGA [DPP] and polycaprolactone [PCl]-poly[amidoamine] amine-based linear-dendritic block co-polymer) are predominantly affected by hydrogen bonding disruption. In contrast, a purely linear block co-polymer system (carboxylic acid terminated poly[lactic-co-glycolic acid]) necessitates both electrostatics and hydrogen bonding to assemble with IL and a two-component electrostatically bound system (electrostatic PEG-PLGA [EPP]) favors hydrogen-bonding with electrostatics serving as a secondary role.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 6","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135596822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation of the electronic structure and Li-ion mobility with modulus and hardness in LiNi0.6Co0.2Mn0.2O2 cathodes by combined near edge X-ray absorption finestructure spectroscopy, atomic force microscopy, and nanoindentation 结合近边X射线吸收精细结构光谱、原子力显微镜和纳米压痕研究LiNi0.6Co0.2Mn0.2O2阴极的电子结构和Li离子迁移率与模量和硬度的关系

IF 2.9

Electrochemical science advances Pub Date : 2023-09-20 DOI: 10.1002/elsa.202300017

Florian Hausen, Niklas Scheer, Bixian Ying, Karin Kleiner

{"title":"Correlation of the electronic structure and Li-ion mobility with modulus and hardness in LiNi0.6Co0.2Mn0.2O2 cathodes by combined near edge X-ray absorption finestructure spectroscopy, atomic force microscopy, and nanoindentation","authors":"Florian Hausen, Niklas Scheer, Bixian Ying, Karin Kleiner","doi":"10.1002/elsa.202300017","DOIUrl":"10.1002/elsa.202300017","url":null,"abstract":"The electrochemical performance of cathode materials in Li-ion batteries is reflected in macroscopic observables such as the capacity, the voltage, and the state of charge (SOC). However, the physical origin of performance parameters are atomistic processes that scale up to a macroscopic picture. Thus, revealing the function and failure of electrochemical devices requires a multiscale (and -time) approach using spectroscopic and microscopic techniques. In this work, we combine near-edge X-ray absorption fine structure spectroscopy (NEXAFS) to determine the chemical binding state of transition metals in LiNi0.6Co0.2Mn0.2O2 (NCM622), electrochemical strain microscopy to understand the Li-ion mobility in such materials, and nanoindentation to relate the mechanical properties exhibited by the material to the chemical state and ion mobility. Strikingly, a clear correlation between the chemical binding, the mechanical properties, and the Li-ion mobility is found. Thereby, the significant relation of chemo-mechanical properties of NCM622 on a local and global scale is clearly demonstrated.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 6","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136315345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Probing passivity of corroding metals using scanning electrochemical probe microscopy 用扫描电化学探针显微镜探测腐蚀金属的钝化性

IF 2.9

Electrochemical science advances Pub Date : 2023-08-03 DOI: 10.1002/elsa.202300014

Sebastian Amland Skaanvik, Samantha Michelle Gateman

{"title":"Probing passivity of corroding metals using scanning electrochemical probe microscopy","authors":"Sebastian Amland Skaanvik, Samantha Michelle Gateman","doi":"10.1002/elsa.202300014","DOIUrl":"10.1002/elsa.202300014","url":null,"abstract":"Passive films are essential for the longevity of metals and alloys in corrosive environments. A great deal of research has been devoted to understanding and characterizing passive films, including their chemical composition, uniformity, thickness, porosity, and conductivity. Many characterization techniques are conducted under vacuum, which do not portray the true in-service environments passive films will endure. Scanning electrochemical probe microscopy (SEPM) techniques have emerged as necessary tools to complement research on characterizing passive films to enable the in situ extraction of passive film parameters and monitoring of local breakdown events of compromised films. Herein, we review the current research efforts using scanning electrochemical microscopy, scanning electrochemical cell microscopy (or droplet cell measurements), and local electrochemical impedance spectroscopy techniques to advance the knowledge of local properties of passivated metals. The future use of SEPM for quantitative extraction of local film characteristics within in-service environments (i.e., with varying pH, solution composition, and applied potential) is promising, which can be correlated to nanostructural and microstructural features of the passive film and underlying metal using complementary microscopy and spectroscopy methods. The outlook on this topic is highlighted, including exciting avenues and challenges of these methods in characterizing advanced alloy systems and protective surface films.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46622445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical, vibrational, electrical, and electrochemical studies of new plasticized methylcellulose-based solid polymer electrolytes for supercapacitor application 用于超级电容器的新型增塑甲基纤维素基固体聚合物电解质的光学、振动、电学和电化学研究

IF 2.9

Electrochemical science advances Pub Date : 2023-07-30 DOI: 10.1002/elsa.202300018

Theodore Manfo Azemtsop

{"title":"Optical, vibrational, electrical, and electrochemical studies of new plasticized methylcellulose-based solid polymer electrolytes for supercapacitor application","authors":"Theodore Manfo Azemtsop","doi":"10.1002/elsa.202300018","DOIUrl":"10.1002/elsa.202300018","url":null,"abstract":"In this work, new plasticized solid polymer electrolytes (SPEs) are developed using MC (methylcellulose) as a polymer host, and sodium iodide (NaI) as a dopant via the solution casting method. Ethyl carbonate (EC) is used as a plasticizing agent to improve the properties of the SPEs. Polarized optical microscopy analysis reveals that the surface morphology of the MC-NaI-EC films contained porous amorphous regions owing to the presence of EC. The complex formation between MC, NaI, and EC is confirmed by Fourier-transform infrared spectra. The addition of EC in the MC-NaI polymer salt matrix enhances the electrochemical properties of the prepared films. The highest ionic conductivity of 5.06×10−3 S/cm is achieved for the composition: MC+50 wt. % NaI +10 wt. % EC. The linear sweep voltammetry test reveals that the optimal plasticized-SPE can withstand up to 2.5 V. The ionic transference number analysis reveals that 99% of ions contribute to the total conductivity. The optimized SPE film and graphene oxide-based electrodes are used to manufacture a solid-state electrical double-layer capacitor. The coulomb efficiency of the supercapacitor cell is 100%, and the specific capacitance of the supercapacitor is found to be 18.56 F/g utilizing impedance data at low frequency.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"4 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45914926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly sensitive glucose electrochemical sensor using sugar-lectin interactions 利用糖-凝集素相互作用的高灵敏度葡萄糖电化学传感器

IF 2.9

Electrochemical science advances Pub Date : 2023-07-25 DOI: 10.1002/elsa.202300015

Kyoko Sugiyama, Fumiya Sato, Sachiko Komatsu, Toshio Kamijo, Kentaro Yoshida, Yusuke Kawabe, Hiromi Nishikawa, Tsutomu Fujimura, Yasufumi Takahashi, Katsuhiko Sato

引用次数: 0

Optimal pore shape in a low-Pt PEM fuel cell cathode catalyst layer 低Pt PEM燃料电池阴极催化剂层中的最佳孔形状

IF 2.9

Electrochemical science advances Pub Date : 2023-07-18 DOI: 10.1002/elsa.202300021

Andrei Kulikovsky

引用次数: 0

Electrochemical contributions: Sir William Robert Grove (1811–1896) 电化学贡献:威廉·罗伯特·格罗夫爵士(1811-1896)

Electrochemical science advances Pub Date : 2023-07-18 DOI: 10.1002/elsa.202300023

Evgeny Katz

{"title":"Electrochemical contributions: Sir William Robert Grove (1811–1896)","authors":"Evgeny Katz","doi":"10.1002/elsa.202300023","DOIUrl":"10.1002/elsa.202300023","url":null,"abstract":"William Robert Grove was a British scientist, who developed a “gas voltaic battery” which was the forerunner of modern fuel cells. Thus, Grove is known as the “Father of the Fuel Cell”.In his early study, Grove invented a novel electric cell (battery) named after him the Grove cell. This new kind of battery included zinc and platinum electrodes (operating as the anode and cathode, respectively) immersed in an acidic solution and separated with a porous ceramic membrane. This battery was demonstrated in 1839 at the Académie des Sciences meeting in Paris.Later, in 1842, Grove invented the first fuel cell (named by him “gas voltaic battery”). This cell produced electrical energy by combining hydrogen and oxygen to water at separated electrodes in the process opposite to the water electrolysis. The first fuel cell prototype opened a new research and engineering area leading to modern fuel cells used in many practically important applications. It is interesting to note that the practical importance of fuel cells was not recognized at the beginning. Particularly, the Nobel Prize winner Wilhelm Ostwald described the Grove's gas battery in his famous book “Electrochemistry: History and Theory”, published in 1896, as “of no practical importance but quite significant for its theoretical interest.” The practical importance of the fuel cells was recognized later (Figure 1).Acknowledging his scientific achievements Grove was knighted in 1872.This article is part of a series featuring historic contributions in and around electrochemistry. At least one such article appears in every issue of Electrochemical Science Advances.The author declares no conflict of interest.","PeriodicalId":93746,"journal":{"name":"Electrochemical science advances","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/elsa.202300023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47740868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0