Article
Chemistry, Analytical
Fangxu Hu, Yuanyuan Ren, Langlang Chen, Yijin Sheng, Cheng Zheng, De Li, Yong Chen
Summary: This article describes the electrochemical oscillation phenomenon of Li-ion batteries and its impact on the electrochemical kinetics of materials. Through the study of a three-electrode coin cell and in-situ electrochemical impedance spectroscopy, it was found that a Li-deficient Li4Ti5O12 material exhibited distinct electrochemical oscillation during the charge process, compared with two other materials without oscillation. This study further confirmed the reaction process of electrochemical oscillation and revealed its underlying mechanism.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Raymond Leopold Heydorn, Jana Niebusch, David Lammers, Marion Goerke, Georg Garnweitner, Katrin Dohnt, Rainer Krull
Summary: This study investigates the feasibility of using bacterial cellulose as separator material in Ni-Zn batteries. Results show that the crystalline structure of BC can change during the manufacturing process, and BC separators exhibit higher selectivity for hydroxide and zincate ions.
Article
Electrochemistry
C. Martinez-Cisneros, C. Antonelli, B. Levenfeld, A. Varez, J. C. Perez-Flores, A. Santos-Mendez, A. Kuhn, J-Y Sanchez
Summary: This study systematically investigates non-woven separators based on polyacrylonitrile blended with cellulose and para-aramid fibers, providing a potential alternative for more stable and safer lithium-ion batteries. Although the conductivity values are modest, the electrochemical performance developed when used in Li4Ti5O12/LiCoO2 cells is satisfactory.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Jing Guo, Yongjian Wang, Suhong Li, Yanyan Qin, Yaosheng Meng, Lintao Jiang, Hao Huang, Lingdi Shen
Summary: Scalable Janus separators are designed by simply coating and gelating chitosan (CS) on one side of a commercial cotton pad (CP). The zincophilic surface of the CS-CP separator can lock water molecules, buffer protons, and change the transport manner of zinc ions by beneficial adsorption, effectively suppressing dendrite formation and side reactions, and ensuring excellent electrochemical performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Nan Qin, Liming Jin, Guangguang Xing, Qiang Wu, Junsheng Zheng, Cunman Zhang, Zonghai Chen, Jim P. Zheng
Summary: Developing high-capacity electrodes requires accurate evaluation of electrochemical behaviors under increasing current density. The polarization at the lithium counter electrode has become a barrier for accurate evaluation of battery electrodes. In this study, the impact of the lithium counter electrode was minimized by decoupling the electrochemical behavior of high-capacity electrodes using a single-channel three-electrode vehicle. The accurate evaluations revealed excellent rate capability and stable cycling performance of the high-capacity graphite electrode.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Analytical
Dorcas Zide, Cecil Felix, Tobie Oosthuysen, Bernard Jan Bladergroen
Summary: In this study, beta-Ni(OH)(2) was used as the starting material and partially substituted with Mg2+ and Mn2+ to optimize the performance of the positive electrode materials for nickel-iron batteries. The resulting Ni0.95Mg0.05(OH)(2) and Ni0.9Mn0.1(OH)(2) compositions showed promising electrochemical activities, with improved cycle life and discharge capacities compared to the undoped Ni(OH)(2) electrode.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Di Zhang, Hongfei Lu, Chenxu Duan, Yi Qin, Zhenjie Zhu, Zili Zhang, Nawei Lyu, Yang Jin
Summary: An inorganic oxide-based hydrophobic-hydrophilic-hydrophobic self-assembled separator system is proposed to improve the cycling life and stability of zinc-ion batteries.
Article
Chemistry, Physical
Sadegh Askari, Davide Mariotti, Paul Brunet, Alexander Vahl, Jan Benedikt
Summary: The hybrid Zn-air and Zn-M battery with Fe-doped Ni double hydroxide nanoflakes and activated carbon cathode material shows superior performance, high energy density, exceptional energy conversion efficiency, and outstanding power density. It also enables high-rate charging due to rapid redox reaction kinetics and excellent cathode materials catalytic activity.
MATERIALS TODAY ENERGY
(2021)
Review
Chemistry, Physical
Weiguang Fang, Juanjuan Zhao, Wen Zhang, Piaolu Chen, Zhiman Bai, Mingzai Wu
Summary: This article introduces the latest advances and challenges in the exploration of flexible solid-state zinc-air batteries (F-ZABs), highlighting the advantages in terms of energy density, safety, and flexibility, while discussing the technical challenges faced in wearable applications and emphasizing the importance of maintaining a balance among the electrochemical properties, flexibility, and integrability of the batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Ruqing Fang, Anhao Zuo, Zhe Li
Summary: In this study, the impedance response of SiOx materials is measured for the first time using the single-particle electrode technique. Two kinetic parameters, Li+ diffusivity and exchange current density, are obtained and found to be dependent on the Li+ insertion ratio and temperature. Comparison with previous research shows that SiOx has poorer kinetic performance compared to graphite, and smaller SiOx particles are recommended as anode material. The single-particle electrode technique can effectively evaluate the electrochemical kinetics of different materials and provide a new index for material evaluation.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Ying Liu, Yi Liu, Xiang Wu, Young-Rae Cho
Summary: This study reports the use of carbon-encapsulated VOx microspheres, grown by controlling the calcination temperature, as ideal cathode materials for aqueous zinc ion batteries. These batteries exhibit high specific capacity and reversible rate performance, and also demonstrate favorable mechanical and cycle stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Fancheng Sun, Tingting Chen, Qing Li, Huan Pang
Summary: Hierarchical superstructures composed of 1D nanorods were synthesized using a facile solution precipitation method with the control of mixed solvent and sodium dodecyl sulfate (SDS) surfactant. The hierarchical nickel oxalate (Ni-OA) superstructure showed improved stability and higher specific capacity compared to aggregated micro-cuboids and self-assembled micro/nanorods. The assembled Ni-OA-3//Zn battery exhibited good cyclic stability and achieved a high energy density and peak power density in aqueous electrolytes. This work provides a new approach for investigating hierarchical nickel oxalate-based materials in electrochemical energy storage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Mechanics
Hyun-Wook Park, Min-Su Jang, Joo-Seung Choi, Jaechan Pyo, Chun-Gon Kim
Summary: The study manufactured electrodes using woven carbon fabric as the current collector for structural batteries. It was found that an electrode with a thickness of 300 microns showed relatively higher mechanical performance and stable electrochemical reactions in the battery. This electrode demonstrated capacities of 112 mAhg(-1) and 35-36 mAhg(-1) at different rates of charge/discharge.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Jin Seong Cha, Jae-ik Lee, Noh-Uk Seo, Dong Kook Kim, Yun-Chan Kang, Jung Hoon Yang
Summary: This paper proposes a cell configuration based on a three-dimensional ceramic framework and successfully demonstrates a zinc bromine battery with this structure. The porous ceramic structure serves as membranes, electrolyte channels, and cell housing, eliminating the need for expensive membranes and flow frames. The battery shows superior performance and reduced manufacturing costs compared to previous studies on zinc bromine batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Dongshun Ni, M. Kevin Brown
Summary: A Ni-catalyzed silylacylation of alkenes is introduced, providing rapid access to beta-silyl ketones by combining alkenes, CIZnSiR3, and acid chlorides. The method involves a catalytic intermediate of [Ni]-SiR3 complex, which is rare for three-component alkene functionalization. The synthetic utility of the products is demonstrated, along with detailed mechanistic descriptions.
Article
Chemistry, Multidisciplinary
Lars Banko, Emmanuel Batsa Tetteh, Aleksander Kostka, Tobias Horst Piotrowiak, Olga Anna Krysiak, Ulrich Hagemann, Corina Andronescu, Wolfgang Schuhmann, Alfred Ludwig
Summary: Polyelemental material systems, specifically high-entropy alloys, have unprecedented properties, but their exploration and exploitation is challenging due to the vast number of possible combinations. However, a method combining co-sputtering and shadow masking allows for the creation of microscale combinatorial libraries, which cover a wide range of compositions and enable high-throughput characterization. By applying this method, electrocatalytic activity maps for hydrogen evolution, oxygen evolution, and oxygen reduction reactions were obtained for two high-entropy alloy systems, identifying activity optima and lean compositions with low noble-metal content. This demonstrates the potential of these microlibraries as a discovery platform for polyelemental systems.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Changlong Wang, Yufeng Wu, Alexander Bodach, Moritz Lukas Krebs, Wolfgang Schuhmann, Ferdi Schueth
Summary: This study discusses the importance of hydrogen generated in electrolyzers for future energy scenarios. The standard anode reaction, oxygen evolution, is complex and requires high overpotential. The researchers have discovered a high-performance electrode based on earth-abundant elements, which can oxidize organic molecules at high current densities, providing a solution to the cost issue of hydrogen electrolysis and generating additional revenue.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Ieva A. Cechanaviciute, Rajini P. Antony, Olga A. Krysiak, Thomas Quast, Stefan Dieckhoefer, Sascha Saddeler, Pascal Telaar, Chen Yen-Ting, Martin Muhler, Wolfgang Schuhmann
Summary: Multi-metal electrocatalysts offer a wide range of catalytic possibilities through synergistic element interactions. This study presents a polymer/metal precursor spraying technique that enables the production of diverse multi-metal catalyst materials. The synthesized catalysts, including CoNiFeMoCr, were characterized and tested for the oxygen evolution reaction (OER). The CoNiFeMoCr catalyst exhibited a polycrystalline structure, and operando Raman measurements indicated the involvement of multiple active sites. Additionally, CoNiFeMoCr electrodes supported by Ni foam were utilized for water splitting in flow-through electrolysis cells and alkaline membrane electrode assembly (MEA) configurations, showing promising performance with high current densities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Emmanuel Batsa Tetteh, Dimitrios Valavanis, Enrico Daviddi, Xiangdong Xu, Carla Santana Santos, Edgar Ventosa, Daniel Martin-Yerga, Wolfgang Schuhmann, Patrick R. Unwin
Summary: The study focuses on the material for Li-ion batteries and develops a combination method of scanning electrochemical cell microscopy and in situ optical microscopy for high-throughput charge/discharge analysis of single TiO2 nanoparticle clusters. The research reveals that TiO2 with a size of approximately 50 nm can store over 30% of the theoretical capacity at an extremely fast charge/discharge rate. This finding strengthens the potential of TiO2 for fast-charging batteries and the research method can be widely applied for electrochemical screening of nanostructured materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Jana M. Becker, Anna Lielpetere, Julian Szczesny, Sabrina Bichon, Sebastien Gounel, Nicolas Mano, Wolfgang Schuhmann
Summary: A new redox polymer/bilirubin oxidase-based gas diffusion electrode has been developed as a non-current and non-stability limiting biocathode in a glucose/O2 biofuel cell, serving as a self-powered glucose biosensor.
BIOELECTROCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Panpan Wang, Anna Frank, Fangyuan Zhao, Marc M. Nowaczyk, Felipe Conzuelo, Wolfgang Schuhmann
Summary: The use of multilayered PSI monolayers can improve the performance of PSI-based biodevices by maximizing light absorption. However, the small loading of immobilized PSI molecules limits their practical application.
BIOELECTROCHEMISTRY
(2023)
Article
Biophysics
Kavita Jayakumar, Anna Lielpetere, Daniel A. Domingo-Lopez, Ruth E. Levey, Garry P. Duffy, Wolfgang Schuhmann, Donal Leech
Summary: Foreign body response (FBR) is a challenge for implantable biosensors and medical devices. Zwitterionic polymers (ZPs) show promise in reducing biofouling. A ZP containing MPC was found to effectively resist fibrinogen adsorption and fibroblast adhesion, while maintaining sensor performance.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Joao R. C. Junqueira, Debanjan Das, Ann Cathrin Brix, Stefan Dieckhoefer, Jonas Weidner, Xin Wang, Jialin Shi, Wolfgang Schuhmann
Summary: Electrochemical CO2 conversion is a crucial technology for promoting the production of carbon-containing molecules and reducing CO2 emissions. This study reports a conceptual paired electrolyzer that can simultaneously produce formate at both the anode and cathode. The paired electrolyzer shows high selectivity and activity for formate production at high current densities, achieving a combined Faradaic efficiency for formate of 141% (45% anode and 96% cathode) at 200 mAcm(-2) current density.
Article
Chemistry, Physical
Moonjoo Kim, Emmanuel Batsa Tetteh, Alan Savan, Bin Xiao, Alfred Ludwig, Wolfgang Schuhmann, Taek Dong Chung
Summary: In this study, a method to evaluate the reorganization energy (?) of MEPBr2n+1 by scanning electrochemical cell microscopy (SECCM) was reported, which allows high throughput electrochemical measurements using a single electrode with high spatial resolution. The investigation of ? on a high-entropy alloy materials library composed of Pt, Pd, Ru, Ir, and Ag suggests a negative correlation between ? and the work function.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ellen Suhr, Olga A. Krysiak, Valerie Strotkoetter, Felix Thelen, Wolfgang Schuhmann, Alfred Ludwig
Summary: High-entropy nitrides are a class of unexplored materials with good mechanical properties, high stability against chemicals, and promising electrocatalytic performance. In this study, a high-entropy nitride system (Ti-Co-Mo-Ta-W)N is investigated, which combines binary and ternary nitrides showing good water-splitting activities. Thin-film materials libraries with continuous composition spreads are deposited using reactive cosputter deposition. The films exhibit a single-phase solid solution structure and low resistivity values. The oxygen evolution reaction activity of the (Ti-Co-Mo-Ta-W)N films is measured, and the results indicate that stability is a challenge for high-entropy nitrides in oxygen-related electrocatalytic reactions. The reactive sputtering method is used to prepare high-entropy nitride materials libraries, which serve as a test platform for studying the stability of nitride films during catalytic applications.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Adib Abdillah Mahbub, Joao R. C. Junqueira, Xin Wang, Jian Zhang, Stefan Dieckhoefer, Sabine Seisel, Debanjan Das, Wolfgang Schuhmann
Summary: A facile strategy of using 2-methyl-imidazole coordinated to Bi to boost CO2 reduction to formate with high selectivity and activity is reported.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Joao R. C. Junqueira, Debanjan Das, Ann Cathrin Brix, Stefan Dieckhoefer, Jonas Weidner, Xin Wang, Jialin Shi, Wolfgang Schuhmann
Summary: This study presents a conceptual paired electrolyzer that can simultaneously produce formate at high currents. By coupling CO2 reduction with glycerol oxidation, a BiOBr-modified gas-diffusion cathode and a NixB on Ni foam anode maintain their selectivity for formate in the paired electrolyzer compared to half-cell measurements. The paired reactor achieves a combined Faradaic efficiency for formate of 141% (45% anode and 96% cathode) at a current density of 200 mA cm(-2).
Article
Electrochemistry
Ann Cathrin Brix, Olga A. Krysiak, Ieva A. Cechanaviciute, Gal Bjelovucic, Lars Banko, Alfred Ludwig, Wolfgang Schuhmann
Summary: This article discusses the potential of using an alternative anode reaction to produce green hydrogen and convert lignin into valuable chemicals. The use of pulse electrolysis and scanning droplet cell-assisted screening are explored as methods to enhance the efficiency and selectivity of the electrochemical processes.
Article
Chemistry, Physical
Ridha Zerdoumi, Alan Savan, Marshal Amalraj, Emmanuel Batsa Tetteh, Florian Lourens, Olga A. Krysiak, Joao R. C. Junqueira, Alfred Ludwig, Wolfgang Schuhmann
Summary: Alloying dissimilar elements is an effective strategy for enhancing the electrocatalytic properties of multi-metal materials, by modifying electronic and geometric effects. This research investigates the interplay between these parameters using the quaternary PdAgCuFe thin-film system, and establishes a correlation between valence electron density and catalytic activity.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Carla Santana Santos, Martina Romio, Yuri Surace, Nicolas Eshraghi, Marco Amores, Andreas Mautner, Christiane Groher, Marcus Jahn, Edgar Ventosa, Wolfgang Schuhmann
Summary: Magnesium-ion batteries are seen as environmentally sustainable, cheaper, and safer alternatives to lithium-ion systems. However, the formation of native solid electrolyte interphases (n-SEIs) due to spontaneous electrolyte decomposition affects the performance of these batteries. In this study, scanning electrochemical microscopy (SECM) was used to measure the electronic properties of n-SEIs, revealing the influence of different electrolyte compositions on their conductivities.
