Article
Nanoscience & Nanotechnology
Pengcheng Jing, Siobhan Stevenson, Huimin Lu, Peng Ren, Isaac Abrahams, Duncan H. Gregory
Summary: A new cathode material, vertically stacked vanadium molybdenum sulfide (VMS) nanosheets, is reported for magnesium-ion batteries (MIBs). The integration of vanadium within molybdenum sulfide nanostructures enhances conductivity, charge transfer, and the accommodation and transport of Mg2+. Additionally, electrolyte additive-induced interlayer expansion facilitates the diffusion of Mg2+ cations. Experimental results demonstrate that VMS nanosheets show promising performance as high-performance cathodes in MIBs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yujie Li, Yuanyuan Liu, Danning Xing, Jiajia Wang, Liren Zheng, Zeyan Wang, Peng Wang, Zhaoke Zheng, Hefeng Cheng, Ying Dai, Baibiao Huang
Summary: The research found that BiVO4 ultrathin nanosheets can simultaneously disintegrate pure water into hydrogen and oxygen under simulated solar light irradiation without sacrificial reagents. A novel 2D/2D BiVO4/Ti3C2 composite was successfully synthesized through electrostatic interaction, showing higher photoexcited carrier transfer and separation efficiency for remarkable photocatalytic overall water splitting activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Mewin Vincent, Venkata Sai Avvaru, Maciej Haranczyk, Vinodkumar Etacheri
Summary: This paper presents a high-performance Mg-Li dual-ion battery based on a cobalt-doped TiO2 cathode. The cathode demonstrates exceptional pseudocapacitance, specific capacities, rate performance, cyclability, and coulombic efficiency, with rapid charging capability. Cation doping, lattice distortions, and oxygen vacancies contribute to its excellent electrochemical performance.
Article
Chemistry, Multidisciplinary
Xiong Sun, Chengkai Yang, Yajun Zhao, Yang Li, Zhicheng Shang, Henghui Zhou, Wen Liu, Liang Luo, Xiaoming Sun
Summary: The research proposes ultrathin aluminum nanosheets grown on carbon nanotubes as anode materials for lithium ion batteries, achieving high reversible capacity, excellent rate capacity, and long-term stability. Density functional theory calculations reveal the advantages of the Al(111) facet and the role of carbon nanotubes in the composite materials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhuangchai Lai, Apoorva Chaturvedi, Zhenyu Shi, Jiangqi Zhao, Thu Ha Tran, Bo Chen, Ying Huang, Xiehong Cao, Qiyuan He, Zhiyuan Zeng, Chaoliang Tan, Hua Zhang
Summary: This study demonstrates the high-yield and large-scale production of two quaternary metal thiophosphate nanosheets via liquid exfoliation, showcasing the successful preparation of single-crystalline Ni3Cr2P2S9 nanosheets for potential applications in flexible thin films and supercapacitor electrodes.
Article
Chemistry, Physical
Yuke Li, Yijiao Ding, Juncheng Wu, Yu Wang, Lei Chen, Yanxian Jin, Li Zhang, Shi-Bin Ren, De-Man Han
Summary: This study investigates the electrochemical properties of lithium-ion batteries by designing and synthesizing four new PTO polymers with different aryl derivatives as linking units. The optimal PTO-Py polymer displayed high electronic conductivity and enhanced pseudocapacitive behavior. When evaluated as a cathode for LIBs, the PTO-Py electrode exhibited excellent lithium storage performance, rate performance, and cycling abilities.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Ya Xiong, Wendi Liu, Kechen Wu, Teng Liu, Yanmei Chen, Xinzhen Wang, Jian Tian
Summary: The synthesis of ultrathin defective Co3O4/MoS2 nanosheets with large heterointerfaces and high specific surface area has been successfully achieved, and they exhibit excellent gas sensing performances including high response value, selectivity, and long-term stability. The presence of rich defects and intimate interfacial electronic interaction in the Co3O4/MoS2 nanosheets enables abundant active adsorption sites and rapid electrons transfer, contributing to their superior gas sensing properties. The versatile integration strategy demonstrated in this study provides potential for innovative applications in the field of gas sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yuke Li, Yijiao Ding, Juncheng Wu, Yu Wang, Lei Chen, Yanxian Jin, Li Zhang, Shi-Bin Ren, De-Man Han
Summary: By designing and synthesizing a series of novel PTO polymers, the effect of N content in aryl linkers on the electronic conduction and transportation of polymer structures was studied. The optimal PTO-Py polymer exhibited high electronic conductivity and enhanced pseudocapacitive behavior, leading to excellent lithium storage performance and cycling stability in lithium-ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Energy & Fuels
Jethro J. Pryke, Rhiannon M. Kennard, Serena A. Cussen
Summary: Magnesium batteries offer advantages in terms of lower cost and better performance compared to lithium batteries, but they still face challenges such as the high charge density of magnesium ions limiting their intercalation in and out of the cathode, and strict requirements for magnesium ion coordination. This article provides an overview of key challenges and high-performance strategies, with a focus on cathode materials.
Article
Chemistry, Multidisciplinary
Jianbiao Wang, Albertus D. Handoko, Yang Bai, Gaoliang Yang, Yuanjian Li, Zhenxiang Xing, Man Fai Ng, Zhi Wei Seh
Summary: The study presents nickel sulfide hollow nanospheres as cathode materials for magnesium-ion batteries, prepared by a one-step solvothermal process. Regulating the synergistic effect between rich anions and hollow structure positively influences the electrochemical performance. The optimized cathode can support the practical application of nickel sulfide hollow nanospheres in magnesium-ion batteries.
Review
Chemistry, Multidisciplinary
Yongxin Luo, Kaisi Liu, Hongrun Jin, Zidong Wang, Simin Dai, Liang Huang
Summary: 2D materials have unique properties due to their ultrathin feature, making them forefront in various research areas. To ensure wider application, there is a global pursuit for industrial scale fabrication methods. Blowing method is a general and scalable strategy for synthesizing thin materials, providing a new approach for economic and massive preparation of good-quality 2D nanosheets. This minireview summarizes the steps and principles of blowing method, recent progress in preparing different 2D materials, and future opportunities in this field.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Mewin Vincent, Venkata Sai Avvaru, Miguel Castillo Rodriguez, Maciej Haranczyk, Vinodkumar Etacheri
Summary: In this study, a high-rate and ultralong-life Mg-Li hybrid battery based on a dual-phase TiO2 cathode was reported, exhibiting superior pseudocapacitive properties, specific capacities, rate performance, cycling stability, and coulombic efficiency. The outstanding electrochemical performance of the dual-phase TiO2 nanosheet cathode was attributed to the enhanced pseudocapacitive Mg/Li-ion diffusion through nanointerfaces between anatase and bronze crystallites. The approach demonstrated in this study could be further exploited for the development of other high-performance electrodes for advanced Mg-Li hybrid batteries.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Jinwu Hu, Caihong Fang, Xiaomin Jiang, Deliang Zhang, Zhiqing Cui
Summary: We successfully synthesized two-dimensional PtPdCu nanostructures with different morphologies, which exhibited excellent electrocatalytic performances for alcohol oxidation reactions. These nanoalloys showed significantly higher activity compared to commercial Pt/C catalysts, and demonstrated excellent performance and stability for the oxidation of other alcohol molecules.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yunhao Wang, Jingwen Zhou, Chao Lin, Bo Chen, Zhiqiang Guan, Amani M. Ebrahim, Guannan Qian, Chenliang Ye, Lin Chen, Yiyao Ge, Qinbai Yun, Xixi Wang, Xichen Zhou, Gang Wang, Kedi Li, Pengyi Lu, Yangbo Ma, Yuecheng Xiong, Tianshuai Wang, Long Zheng, Shengqi Chu, Ye Chen, Bin Wang, Chun-Sing Lee, Yijin Liu, Qianfan Zhang, Zhanxi Fan
Summary: This work presents a facile one-pot solvothermal method for the synthesis of ultrathin 2D Ru-M (M = Co, Ni, and Cu) nanosheets, which can be used as cathode catalysts for Li-CO2 batteries. The RuCo nanosheets demonstrate excellent catalytic performance with low charge voltage, small overpotential, and high energy efficiency. The study indicates the feasibility of improving the electrochemical performance of Li-CO2 batteries through the in-plane metal alloy sites of ultrathin 2D alloy nanomaterials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jiran Dong, Jinsong Zeng, Jinpeng Li, Pengfei Li, Bin Wang, Jun Xu, Wenhua Gao, Kefu Chen
Summary: This study successfully synthesized 2D carbon nanosheets with hierarchical architecture and irregular structure using prehydrolysis liquor, an industrial byproduct of the pulping industry, through a simple hydrothermal carbonization technique. The activated carbon nanosheets showed an ultrathin structure and high specific surface area, enabling them to be used as both electroactive materials and structural support materials in nanocomposites. The nanocomposite exhibited impressive capacitance properties and the all-solid-state symmetric supercapacitor demonstrated satisfactory energy storage ability. Overall, this work provides a new approach for sustainable and scalable synthesis of carbon nanosheets and offers a double profits strategy for the energy storage and biorefinery industry.
Article
Electrochemistry
Toshihiko Mandai, Ayaka Kutsuma, Masashi Konya, Yukihiro Nakabayashi, Kiyoshi Kanamura
Summary: The current global energy problems call for the development of highly efficient and environmentally friendly energy storage technologies. Rechargeable batteries based on magnesium (Mg) metal anodes are considered promising due to their high capacities and cost-effectiveness. Extensive research has focused on the development of cathode and electrolyte materials for practical Mg batteries. Defect spinel oxides, such as ZnMnO3, have shown great potential as cathode materials with superior cycling performance. Hydrothermal treatment has been used to synthesize fine ZnMnO3 nanoparticles with a large surface area, leading to improved electrochemical performance. The combination of hydrothermally treated ZnMnO3, efficient electrolyte, and shortened diffusion path enables stable battery cycling even at elevated temperatures.
Article
Electrochemistry
Yasushi Idemoto, Ren Okada, Naoya Ishida, Chiaki Ishibashi, Toshihiko Mandai, Naoto Kitamura
Summary: In this study, α-MgCo1.5Mn0.5O4-(1 - alpha)Mg1.33V1.57Ni0.1O4 was successfully synthesized and characterized. The compound showed good discharge capacity and cycling performance, making it a promising material for energy storage applications.
Article
Nanoscience & Nanotechnology
Tjasa Pavcnik, Matic Lozinsek, Klemen Pirnat, Alen Vizintin, Toshihiko Mandai, Doron Aurbach, Robert Dominko, Jan Bitenc
Summary: High-performance electrolytes are crucial for the development of magnesium batteries. This study provides a comprehensive characterization of the novel Mg[Al(hfip)(4)](2) salt in various glyme-based electrolytes, emphasizing the influence of water content and additives. The results highlight the high tolerance of Mg[Al(hfip)(4)](2)-based electrolytes to water and the beneficial effect of additives under challenging cycling conditions. A comparison with the state-of-the-art Mg[B(hfip)(4)](2) salt demonstrates the improved performance of electrolytes containing Mg[Al(hfip)(4)](2) and establishes it as a new standard salt for future magnesium battery research.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Hayato Takemitsu, Yoshihiro Hayashi, Hiroto Watanabe, Toshihiko Mandai, Shunsuke Yagi, Yuya Oaki, Hiroaki Imai
Summary: This study prepared conductive mixtures as positive electrode active materials in rechargeable Mg batteries. High specific surface area and high conductivity are key parameters for practical room-temperature operation.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Naoto Kitamura, Yoichiro Konishi, Wenli Ma, Naoya Ishida, Toshihiko Mandai, Chiaki Ishibashi, Yasushi Idemoto
Summary: In this study, Mg-Fe-O and Mg-Ni-O were investigated as positive-electrode materials for magnesium rechargeable batteries. The crystal structures and electrochemical properties of these materials were studied. The results showed that Mg-Fe-O exhibited higher discharge capacity and good cycle performance, which might be attributed to its specific crystal structure.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Xiatong Ye, Hongyi Li, Takuya Hatakeyama, Hiroaki Kobayashi, Toshihiko Mandai, Norihiko L. Okamoto, Tetsu Ichitsubo
Summary: Rechargeable magnesium batteries are promising candidates for future batteries due to their abundant resources and high energy density. This study compares the reaction behavior of different MnO2 cathodes in two electrolytes and highlights the importance of interfacial stability for practical applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Hiroaki Kobayashi, Yu Fukumi, Hiroto Watanabe, Reona Iimura, Naomi Nishimura, Toshihiko Mandai, Yoichi Tominaga, Masanobu Nakayama, Tetsu Ichitsubo, Itaru Honma, Hiroaki Imai
Summary: Ultraporous and ultrasmall cubic spinel MgMn2O4 (MMO) is fabricated through a freeze-dry assisted room-temperature alcohol reduction process. Heat-treatment removes surface hydroxy groups and activates MMO, increasing its discharge capacity from 160 mAh g(-1) to 270 mAh g(-1), close to the theoretical value. The ultraporous, ultrasmall particles stabilize the metastable cubic spinel phase, promoting Mg2+ insertion/deintercalation and reversible transformation between cubic spinel and cubic rock-salt phases.
Article
Chemistry, Analytical
Yasushi Idemoto, Mina Takamatsu, Chiaki Ishibashi, Naoya Ishida, Toshihiko Mandai, Naoto Kitamura
Summary: Mg1.33V1.67-xMnxO4 (x= 0.1 to 0.4) was synthesized for the first time using a solid-phase method under high vacuum conditions. The crystal structures were confirmed to be spinel with Fd3(-)m space group through powder X-ray diffraction analysis, and the chemical compositions were found to be uniform through STEM observation and elemental analysis. Charge and discharge cycle tests revealed that the discharge capacity depended on the cycle number, Mn composition, and working temperature. Among them, Mg1.33V1.57Mn0.1O4 (x=0.1) exhibited the highest discharge capacity of 256 mAh g(-1) at the 13th cycle, while the initial capacity was only 73 mAh g(-1) at 90 degrees C. The local structure was analyzed using EXAFS spectra, which showed that Mg1.33V1.57Mn0.1O4 had the smallest lattice distortion due to Mn at 16d sites, and XAFS spectra indicated a significant change in the oxidation state of V during the charge/discharge cycles. The particularly stable crystal structure and large contribution of charge compensation by V may contribute to the excellent charge-discharge performance of Mg1.33V1.57Mn0.1O4.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Toshihiko Mandai, Hiroko Naya, Hyuma Masu
Summary: The electrolyte material for high-energy-density rechargeable batteries should have sufficient stability against metallic negative electrodes. Weakly coordinating anion (WCA)-based electrolytes have shown excellent performance due to their strong interaction with metal cations. In this study, the valency of paired cation species was found to affect the transport properties and electrochemical characteristics of the electrolytes, with divalent electrolytes exhibiting higher conductivity than monovalent electrolytes. The combination of magnesium cations and [B(HFIP)4]- anion showed outstanding performance in ethereal solutions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Toshihiko Mandai, Masaru Yao, Keitaro Sodeyama, Akiko Kagatsume, Yoshitaka Tateyama, Hiroaki Imai
Summary: Rechargeable magnesium batteries (RMBs) have the potential to be a sustainable energy storage technology due to the abundance of magnesium metal and its excellent energy storage properties. However, to compete with lithium-ion batteries, their energy density needs to be improved. This study explores the use of different organic solvent-based electrolytes to design anodically stable ether-based electrolyte solutions for RMB applications. Anodically stable electrolytes were successfully developed by combining suitable fluorinated glyme-based solvents with appropriate conducting salts, achieving a remarkable anodic limit and suppressing corrosion of current collectors. However, these electrolytes were not suitable for RMBs with high-voltage oxide-based cathodes due to catalytic decomposition during charging.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Naomi Nishimura, Kazumasa Masaki, Wei Tan, Reona Iimura, Hiroaki Kobayashi, Kei Nishikawa, Toshihiko Mandai, Hidetoshi Somekawa, Yoichi Tominaga
Summary: To improve the cycle performance of Mg metal batteries, a polymer coating (PSTFSI-Mg) was applied on the surface of spinel-type MgMn2O4 cathode. The polymer coating promoted electron transfer between particles, as confirmed by transmission electron microscopy. Density functional theory calculations revealed that the polymer reduced the energy gap between the valence band maximum of MgMn2O4 and the highest occupied molecular orbital level of the electrolyte, thus suppressing electrolyte degradation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Energy & Fuels
Chao Zhang, Jun Cheng, Yiming Chen, Maria K. Y. Chan, Qiong Cai, Rodrigo P. Carvalho, Cleber F. N. Marchiori, Daniel Brandell, C. Moyses Araujo, Ming Chen, Xiangyu Ji, Guang Feng, Kateryna Goloviznina, Alessandra Serva, Mathieu Salanne, Toshihiko Mandai, Tomooki Hosaka, Mirna Alhanash, Patrik Johansson, Yun-Ze Qiu, Hai Xiao, Michael Eikerling, Ryosuke Jinnouchi, Marko M. Melander, Georg Kastlunger, Assil Bouzid, Alfredo Pasquarello, Seung-Jae Shin, Minho M. Kim, Hyungjun Kim, Kathleen Schwarz, Ravishankar Sundararaman
Summary: New materials for electrochemical energy storage and conversion play a crucial role in the electrification and sustainable development of modern societies. Molecular modelling, based on the principles of quantum mechanics and statistical mechanics and empowered by machine learning techniques, allows us to understand, control, and design electrochemical energy materials with atomic precision.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Chemistry, Physical
Takahiro Okuo, Toshihiko Mandai, Hiroyasu Masunaga, Noboru Ohta, Hidetoshi Matsumoto
Summary: In this study, magnesiated perfluorosulfonated ionomer (Nafion-Mg) gel electrolytes swollen in magnesium bis(trifluoromethanesulfonyl)amide/triglyme (Mg(TFSA)(2)/G3) solutions were prepared and characterized. The swollen Nafion gel electrolytes exhibited good ionic conductivity and reversible Mg deposition/dissolution behavior. This is the first study on the structural and electrochemical characterization of magnesium ion-exchanged Nafion swollen in a Mg(TFSA)(2)/glyme solution.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Toshihiko Mandai, Mariko Watanabe
Summary: The compatibility of rechargeable magnesium batteries with atmospheric conditions (except moisture) has not been thoroughly studied. In this study, we investigated the impact of atmospheric conditions on the electrochemical dissolution-deposition behavior of magnesium in non-aqueous electrolytes. Oxygen, even in trace amounts in the electrolyte, was found to be a detrimental impurity for reversible magnesium electrochemistry.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Electrochemistry
Toshihiko Mandai, Hidetoshi Somekawa
Summary: The practical energy density of batteries incorporating elemental metals as anode active materials is largely influenced by the thickness of the metal anodes. However, the use of ultrathin magnesium foils is challenging due to the brittleness and unworkability of magnesium. This study successfully fabricated crack-free ultrathin magnesium foils with favorable microstructure by controlling the initial microstructure and rolling temperature, and demonstrated their excellent electrochemical characteristics as anode materials.
BATTERIES & SUPERCAPS
(2022)