Article
Electrochemistry
Anja Lenzer, Adele Birrozzi, Anna-Lena Wirsching, Yueliang Li, Dorin Geiger, Ute Kaiser, Jakob Asenbauer, Dominic Bresser
Summary: The introduction of transition metals such as iron in oxides of alloying elements has been proven to enable higher capacities and superior charge storage performance for lithium-ion electrode materials. In this study, the evaluation of Sn0.9Fe0.1O2-d(-C) as electrode materials for sodium-ion battery applications is reported. The presence of iron in the tin oxide lattice enables higher specific capacities and a greater reversibility of the de-/sodiation process, similar to lithium-ion batteries. The limited capacity is attributed to an incomplete de-/sodiation reaction, providing insights for alternative reaction mechanisms in sodium-ion anode materials.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Physical
Kuan-Ting Chen, Shaokun Chong, Lingling Yuan, Yi-Chun Yang, Hsing-Yu Tuan
Summary: The construction of an anode material with a conversion-alloying dual mechanism has facilitated the development of high-energy density potassium-ion batteries. The Bi2Se3@NC@rGO composite exhibits excellent electrode integrity and electrochemical kinetics, achieving a high reversible capacity, great rate capability, and ultra-long cycling life. The K-ion full cell assembled using K2Ni[Fe(CN)(6)] cathode also contributes to a high-energy density and excellent cyclability.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Wan Wang, Jingjing Liu, Tianqi Wu, Tingxin Mao, Jinpeng Chen, Weicheng Zhang, Zhicong Shi, Naiguang Wang
Summary: By using a thick-walled copper mold during the casting of liquid alloy, refined dendrites in micro-alloyed Mg-Al-Sn anode are formed, which greatly enhance the corrosion resistance and accelerate the spalling of oxidation products and alleviate the self-corrosion during battery discharge. As a result, the Mg-air battery with refined dendrites shows higher discharge voltages and capacities compared to those using commercial AZ31 magnesium alloy and the same compositional Mg-Al-Sn sample with coarser dendrites. The electrochemical corrosion mechanism related to different dendrites in Mg-Al-Sn anodes is also revealed based on microstructure characterization and electrochemical response.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Anders Brennhagen, Carmen Cavallo, David S. Wragg, Ponniah Vajeeston, Anja O. Sjastad, Alexey Y. Koposov, Helmer Fjellvag
Summary: Na-ion batteries are promising solutions for energy storage due to low-cost and abundant materials. Bismuth molybdate is a promising anode material for Na-ion batteries, operating through a conversion/alloying mechanism. However, capacity degradation is caused by increased irreversibility of the sodiation reactions and the formation of a hexagonal phase Na3Bi.
Article
Chemistry, Multidisciplinary
Da Hui, Xi Chen, Xiaofei Bian, Chunfeng He, Shiyu Yao, Gang Chen, Fei Du
Summary: Bimetallic transition metal chalcogenides material CuSbSe2 exhibits high reversible capacity and excellent rate capability, showing potential as anode material for both sodium-ion batteries and lithium-ion batteries.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Huikun Liu, Guochen Zhao, Hang Li, Shouqiu Tang, Dapeng Xiu, Jin Wang, Huan Yu, Kaiming Cheng, Yuanfeng Huang, Jixue Zhou
Summary: In this study, Mg-3In-xCa alloys were fabricated and the optimal content of Ca (x) was determined for designing high-performance Mg-air batteries. The selected Mg-3In-3Ca alloy exhibited significantly improved battery performance compared to pure Mg-air battery. The synergistic effects of In and Ca on promoting electrode properties were evaluated in detail, providing insights for future research in this field.
Review
Chemistry, Multidisciplinary
Shuangyan Qiao, Qianwen Zhou, Meng Ma, Hua Kun Liu, Shi Xue Dou, Shaokun Chong
Summary: Rechargeable sodium-ion batteries (SIBs) face challenges in electrode materials due to the large ionic radius of Na-ion. However, progress has been made in intercalation, conversion, alloying, conversion-alloying, and organic anode materials for SIBs. Various optimization strategies have been summarized to improve the electrochemical properties of anodes. The merits, drawbacks, challenges, and future directions for high-performance anode materials are discussed.
Article
Energy & Fuels
Jakob Asenbauer, Stefano Passerini, Dominic Bresser
Summary: This study compares the impact of introducing Co at the atomic level in ZnO with mixtures of nano- and microsized CoO and ZnO, highlighting the importance of atomic mixing and doping in achieving higher capacity and effective electron conduction pathways.
Article
Chemistry, Multidisciplinary
Shaokun Chong, Lingling Yuan, Qianwen Zhou, Yikun Wang, Shuangyan Qiao, Ting Li, Meng Ma, Bingyang Yuan, Zhengqing Liu
Summary: In this study, a hierarchically encapsulated bismuth telluride nanoplates structure was constructed as an anode material for potassium-ion batteries, exhibiting excellent electrochemical performance and structural stability. The significant role of conversion-alloying dual-mechanism in potassium-ion storage was visually elucidated using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). This work lays the foundation for an in-depth understanding of the conversion-alloying mechanism in potassium-ion storage.
Article
Chemistry, Physical
Xiuli Ge, Ning Li, Xuefang Yu, Jianbo Cheng, Siliang Chang, Qian Zhao, Hongtao Cui, Kai Feng, Shanshan Liu, Xin Yang
Summary: The new tungstate anode material Li2Ni(WO4)(2)/C shows promising performance in lithium-ion batteries, with high specific capacity and multi-electronic reactions. The carbon coating improves conductivity and particle size, resulting in good cycle stability and rate performance for the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Shaokun Chong, Shuangyan Qiao, Lingling Yuan, Qianwen Zhou, Ting Li, Shihong Dong, Yikun Wang, Meng Ma, Wei Huang
Summary: Nanoplate-structured Sb2Te3 anchored on graphene and N-doped C (Sb2Te3@rGO@NC) is used as an anode material for potassium-ion batteries, exhibiting a dual encapsulation effect that can effectively restrain large volume expansion and enhance electronic transfer and ion adsorption. The resulting Sb2Te3@rGO@NC electrode delivers high charge capacity, rate capability, and long-term lifetime, demonstrating the potential of Sb2Te3-based anodes for potassium-ion batteries and providing insights into the K-ion storage mechanism.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Zhisong Chen, Yuanji Wu, Xi Liu, Yiwei Zhang, Lichun Yang, Hongyan Li
Summary: In this study, a bismuth-based composite with high capacity and unique structure was successfully synthesized using the pyrolysis of Bi-based metal-organic frameworks and in-situ selenization techniques. The composite exhibited fast potassium storage capability and durable cycle performance in potassium-ion batteries. The study also revealed the dual potassium storage mechanism of the composite based on conversion and alloying reactions.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Madhushri Bhar, Sourav Ghosh, Surendra K. Martha
Summary: In this study, a carbon fiber-based freestanding electrode architecture was proposed, which effectively reduced pulverization and conductivity issues by embedding Fe2O3 nanoparticles on the carbon fiber network. The freestanding electrode exhibited an enhanced initial capacity and improved cycling stability compared with the conventional Fe2O3 electrode. The carbon fiber network provided a conductive backbone for ionic and electronic transport, and the electrode showed good electrochemical stability during repeated sodiation/desodiation processes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Lingling Yuan, Qianwen Zhou, Ting Li, Yikun Wang, Zhengqing Liu, Shaokun Chong
Summary: In this study, Bi2S3 nano-rods wrapped by reduced graphene oxide were developed as anode materials for potassium-ion batteries. The composite exhibited excellent electrochemical kinetics and structure stability, and stored potassium ions through a dual mechanism of conversion-alloying. The composite also showed high cycling stability and capacity retention.
Article
Energy & Fuels
Lingling Yuan, Qianwen Zhou, Ting Li, Yikun Wang, Zhengqing Liu, Shaokun Chong
Summary: In this study, Bi2S3 nano-rods wrapped by reduced graphene oxide are used as anodes for potassium-ion storage, showing excellent electrochemical kinetics and structure stability, resulting in high cycling stability and capacity retention.
Article
Chemistry, Physical
Radovan Cerny, Fabrizio Murgia, Matteo Brighi
Summary: The review covers the research on metal hydroborates as solid hydrogen stores and solid electrolytes over the last twenty years, shifting focus from hydrogen storage to solid electrolytes. Various strategies to overcome the strong covalent bonding of hydrogen in hydroborates and disorder their structures at room temperature for solid electrolytes are discussed. Crystal chemistry and crystallography knowledge play an important role in material design, as highlighted in the cited literature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Romain Wernert, Antonella Iadecola, Lorenzo Stievano, Dany Carlier, Laurence Croguennec
Summary: The redox mechanism of KVPO4F1-yOy was investigated using V K-edge X-ray absorption spectroscopy and chemometric analysis. The study revealed that the ionic V3+-F units oxidize at a lower potential than the covalent {V4+=O} units, which explains the observed redox potential of KVPO4F and KVOPO4.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Phuong Nam Le Pham, Romain Wernert, Maelle Cahu, Moulay Tahar Sougrati, Giuliana Aquilanti, Patrik Johansson, Laure Monconduit, Lorenzo Stievano
Summary: A comprehensive understanding of the electrochemical mechanisms of the Prussian Blue Analogue (PBA) K1.67Mn0.65Fe0.35[Fe(CN)(6)](0.92)center dot 0.45H(2)O, a promising cathode material for potassium-ion batteries (PIBs), is achieved by utilizing various characterization techniques. Three successive redox reactions during (de-)potassiation are identified using ex situ(57)Fe Mossbauer spectroscopy and operando Mn and Fe K-edge X-ray absorption spectroscopy. Real-time changes in crystal structure are monitored by operando X-ray diffraction, and the limitations of this PBA are revealed, including reversible Jahn-Teller distortion of Mn and possible dissolution in the electrolyte. These findings highlight the importance of optimizing the chemical composition of PBAs for reliable and stable PBA-based cathodes in PIBs.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Energy & Fuels
Justine Touja, Parnian Salembier Peyrovi, Yann Tison, Herve Martinez, Olinda Gimello, Nicolas Louvain, Lorenzo Stievano, Laure Monconduit
Summary: The interest in lithium metal batteries (LMBs) has increased due to the need for more powerful systems with higher energy density. Strategies to limit dendrite growth, which poses safety concerns for LMBs, have been studied. It has been found that the salt concentration affects electrolyte decomposition and the nature of the electrode solid electrolyte interphase (SEI) during lithium plating/stripping.
Article
Energy & Fuels
Clement Pechberty, Jean-Bernard Ledeuil, Joachim Allouche, Remi Dedryvere, Lorenzo Stievano, Romain Berthelot
Summary: A better control of the metal-electrolyte interface is essential for the development of rechargeable magnesium batteries. Coating the magnesium surface with an amalgam layer formed in contact with a mercury droplet shows an improvement in the plating/stripping process. However, detailed investigation reveals that the amalgam layer undergoes substantial chemical and morphological changes during cycling, indicating that it doesn't act as a protective coating but rather as an independent electrode material.
Article
Chemistry, Physical
Abdolkhaled Mohammadi, Sabrine Djafer, Syreina Sayegh, Andrew J. Naylor, Mikhael Bechelany, Reza Younesi, Laure Monconduit, Lorenzo Stievano
Summary: Although lithium metal and anode-free rechargeable batteries (LMBs and AFBs) have great potential as energy storage systems, the formation of high-surface lithium deposits during plating-stripping cycles hinders their practical applications. Efforts have been made to prevent this issue, such as electrolyte modification and electrode surface modification. However, the evaluation of battery performance using Coulombic efficiency (CE) is challenging due to various parameters. This study aims to reveal the interplay of several overlooked parameters and provide insights into the evaluation methods for LMBs and AFBs.
CHEMISTRY OF MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Radovan Cerny, Matteo Brighi, Hui Wu, Wei Zhou, Mirjana Dimitrievska, Fabrizio Murgia, Valerio Gulino, Petra E. de Jongh, Benjamin A. Trump, Terrence J. Udovic
Summary: This study investigates the thermal polymorphism in CsCB11H12 and discovers the existence of two polymorphs: the ordered R3 polymorph at around 313K and the disordered I43d polymorph at around 353K. Additionally, it identifies a disordered Fm3 polymorph appearing from the disordered I43d polymorph at 513K and transforming into a high-temperature P6(3)mc polymorph. Neutron scattering results show isotropic rotational diffusion of CB11H12- anions in the disordered phase at 560K.
Review
Chemistry, Inorganic & Nuclear
Romain Berthelot, Carla Crobu, Eunice Mumba Mpanga, Bernard Fraisse, Marie-Liesse Doublet
Summary: Alkali-mixed compositions of Li2-xNaxSnO3 were obtained through solid-state synthesis with a quenching procedure, demonstrating the substitution reaction of lithium and sodium ions in the layered oxides.
PROGRESS IN SOLID STATE CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Sajad Rahimi, Lorenzo Stievano, Laetitia Dubau, Cristina Iojoiu, Laureline Lecarme, Fannie Alloin
Summary: Lithium-sulfur (LSB) batteries have high theoretical energy density and low cost, making them a promising choice for next-generation energy storage. By using well-designed sulfur host materials, such as Fe or Co single atoms embedded on N-doped reduced graphene oxide, the challenges of LSB can be addressed and the electrochemical performance can be enhanced.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Ghassen Charrad, Justine Harmel, Romain Berthelot, Pierre-Louis Taberna, Patrice Simon, Patrick Rozier
Summary: Layered oxides with the composition NaxMO2 have attracted attention for their composition diversity and promising electrochemical performances in sodium-ion batteries. This study attempts to synthesize sodium-rich P-type NaxMn2/3Ni1/3O2 and NaxMn1/2Ni1/2O2 and investigates their electrochemical behavior. The optimization of the synthesis protocol led to stabilize only P3-type single-phases. The investigation shows that the actual Na content is limited but still higher than conventionally reported for most of P3-type layered oxides.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Valerio Gulino, Alessandro Longo, Laura M. de Kort, Hendrik P. Rodenburg, Fabrizio Murgia, Matteo Brighi, Radovan Cerny, Christoph J. Sahle, Martin Sundermann, Hlynur Gretarsson, Frank de Groot, Peter Ngene
Summary: Solid-state sodium ion conductors are important for high-capacity, low-cost, and improved-safety all-solid-state sodium batteries. Sodium closo-carbadodecaborate (NaCB11H12) is an attractive Na-ion conductor with high thermal and electrochemical stability. Mechanical milling can greatly increase the conductivity of NaCB11H12, but prolonged milling leads to a decrease in conductivity due to the increased proximity of Na+ to the CB11H12- cage. X-ray Raman scattering (XRS) spectroscopy is used to probe the origin of this anomalous impact, providing valuable information on the electronic structure of solid electrolytes and battery materials.
Article
Chemistry, Physical
Armance Sagot, Lorenzo Stievano, Valerie Pralong
Summary: This study reports the synthesis and electrochemical activity of a novel polymorph of K3MnO4, which has a 0D-type structure composed of isolated MnO4 tetrahedra and K+ ions. A reversible charge capacity of almost one K+ per unit formula at an average voltage of 2.3 V vs K+/K is achieved, leading to the reversible formation of K2MnO4 through a biphasic process.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Carlos Berlanga, Moulay Tahar Sougrati, Antonio J. J. Fernandez-Ropero, Neyrouz Baaboura, Nicholas E. E. Drewett, Juan Lopez M. del Amo, Gene Nolis, Jose S. S. Garitaonandia, Marine Reynaud, Lorenzo Stievano, Montse Casas-Cabanas, Montse Galceran
Summary: The electrochemical activity of maricite NaFePO4 can be activated by ball milling with carbon. The effect of ball milling on the structure of maricite NaFePO4 and its electrochemical mechanism has been investigated using various characterisation methods. The results suggest that the activation is due to the partial nano-sizing and amorphisation of maricite, as well as the oxidation of iron centres during ball milling.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Nusik Gedikoglu, Pablo Salcedo-Abraira, Long H. B. Nguyen, Nathalie Guillou, Nicolas Dupre, Christophe Payen, Nicolas Louvain, Lorenzo Stievano, Philippe Poizot, Thomas Devic
Summary: Metal organic frameworks (MOFs) built up from metal-sulfur (M-S) bonds have shown impressive electronic properties and good stability. In this study, three new compounds were discovered through the investigation of the reactivity between a mixed thiolate-carboxylate ligand and Fe(III) salts. One of the compounds exhibited potential reversible electrochemical activity and good capacity retention.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Julien Fullenwarth, Bernard Fraisse, Nicolas Dupre, Lorenzo Stievano, Laure Monconduit
Summary: MnP4 has been found to be a potential negative electrode material for both Li-ion and Na-ion batteries. The study reveals a complex conversion mechanism and the formation of amorphous sodiated phosphide species, with its performance surpassing that of hard-carbon-based anodes typically used in Na-ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
