Article
Chemistry, Physical
Zan Huang, Peifang Luo, Honghong Zheng, Zhaochun Lyu
Summary: A sulfur-doped graphene modified Li4Ti5O12@C nanocomposite (SG-T@C) was successfully fabricated via a sol-gel method assisted with solid-state route. The composite showed homogeneously dispersed Li4Ti5O12@C nanocrystals and the introduced sulfur-doped graphene acted as a conductive bridge, improving the electrical conductivity. The SG-T@C exhibited excellent high-rate performance and cycling stability, making it a promising electrode material for lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Ting-Yu Lee, Wei-Ren Liu
Summary: By introducing reduced graphene oxide, the study effectively buffered the volume expansion of CoIn2S4, leading to improved cycle performance in lithium ion batteries.
Article
Chemistry, Multidisciplinary
Ji-Hye Koo, Seung-Min Paek
Summary: A Ge/GeO2/graphene composite material was synthesized to address the volume expansion issue of germanium/germanium oxide nanoparticles during charge/discharge cycles. The material showed superior cycling stability by trapping Ge/GeO2 nanoparticles between graphene nanosheets to offset the volume expansion effect. Transmission electron microscopy images confirmed the distribution of Ge/GeO2 nanoparticles on graphene nanosheets.
Article
Engineering, Environmental
Zichen Xu, Jing Yang, Shengxian Hou, Hongtao Lin, Shuhai Chen, Qiang Wang, Hao Wei, Jin Zhou, Shuping Zhuo
Summary: In this study, TDPP-based polymer derivatives/RGO composites were synthesized and showed excellent electrochemical performance as anodes for lithium-ion batteries. The participation of RGO enhanced the electronic conductivity and improved the capacity retention, making them promising candidates for LIBs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Leichao Meng, Jianhong Peng, Yi Zhang, Yongfu Cui, Lingyun An, Peng Chen, Fan Zhang
Summary: In this paper, different methods were employed to prepare lithium vanadium oxide (LVO) samples. It was found that the LVO samples obtained by sol-gel method had uniform nanoparticle morphology. The LVO/graphene (GN) composite synthesized by sol-gel method showed outstanding cycling performance and rate performance, attributed to the improved distribution of LVO by flexible GN and the formation of a highly conductive network.
Article
Chemistry, Physical
Malcolm Lockett, Viviana Sarmiento, Matthew Gonzalez, Seungbae Ahn, Jiaying Wang, Ping Liu, Oscar Vazquez-Mena
Summary: A novel ultrathin binderless anode based on stacked reduced multilayer graphene oxide and silicon nanowires was developed, showing a high specific capacity and capacity retention after multiple cycles. This innovative approach of producing well-ordered graphene multilayers by chemical vapor deposition offers promise for enhancing the energy density and stability of lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Wenlu Min, Xianghong Chen, Shuhan Huang, Yunlong Liao, Zhiyong Liang, Yu Lei, Jiantie Xu
Summary: The synthesis of reduced holey graphene oxides with different structures is important for the development of advanced lithium ion batteries. The rhG-400 as cathode for LIBs delivers high reversible capacity, excellent rate capability, and maintains an ultra-long cycling life.
Review
Materials Science, Ceramics
Z. Nezamzadeh Ezhyeh, M. Khodaei, F. Torabi
Summary: Lithium-Ion Batteries (LIBs) are crucial for saving oil and reducing exhaust emissions in applications such as electric vehicles and electronic devices. Lithium titanate (LTO) is a promising anode material with reversible Li-ion extraction and low volume change during Li transmission. However, LTO has limitations that can be improved through doping. This report reviews the doping of LTO with various dopants and different fabrication methods.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Junaid Aslam, Yong Wang
Summary: The reduced graphene oxide/iron oxide and reduced graphene oxide/cobalt oxide composites were synthesized via a simple and scalable ball-milling method. The interaction between Fe2O3 and Co3O4 with the rGO matrix improves electronic conductivity and stabilizes volume variation during cycling, resulting in high specific capacities. The rGO/Fe2O3 and rGO/Co3O4 composites exhibit excellent electrochemical performance, with the rGO/Fe2O3T-5 and rGO/Co3O4T-5 composites showing higher reversible capacities and significant rate performance. These composites made by ball milling could be promising anode materials for LIBs due to their electrochemical efficiency, high capacity, and low cost. The findings may guide the development of other metal oxide-graphene composites for future applications.
Article
Chemistry, Physical
Jia-Lin Xu, Xue Zhang, Yu-Xin Miao, Man-Xi Wen, Wen-Jie Yan, Pai Lu, Zeng-Rong Wang, Qiang Sun
Summary: The study developed a lamellar Fe3O4-based electrode by growing carbon-coated Fe3O4 nanoparticles on reduced graphene oxide nanosheets, showing excellent cycle and rate performance in lithium/sodium-ion batteries.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yao Chen, Zhenyuan Ji, Xiaoping Shen, Huaiyang Chen, Ying Qi, Aihua Yuan, Jingxia Qiu, Baolong Li
Summary: This study synthesized Zn2GeO4/RGO composites by growing Zn2GeO4 hollow rods on reduced graphene oxide, addressing the issues of volume expansion and capacity fading in Germanium-based ternary oxides used as LIB anodes. By adjusting the size of the Zn2GeO4 hollow rods and the content of RGO, the optimized composite showed excellent lithium storage performance, with pseudocapacitance-dominated behavior, high reversible capacity, excellent rate capability, and good cycling stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Electrochemistry
Shengyang Huang, Xue Qin, Chanrong Lei, Xinyu Miao, Tianyu Wei
Summary: The novel rGO-coated Si@SiOx@beta-Bi2O3/Bi composite exhibits high specific capacity and cycling stability, mainly achieved through the structural integrity guarantee of Si-core by Bi2O3 shell and synergistic action with Bi nanodots to expedite Li+/e(-) transport kinetics.
ELECTROCHIMICA ACTA
(2021)
Article
Green & Sustainable Science & Technology
Min Zhong, Jiawei Yan, Lei Wang, Ye Huang, Li Li, Shenghui Gao, Yafei Tian, Wenzhuo Shen, Jiali Zhang, Shouwu Guo
Summary: In this study, porous graphite modified with graphene oxide was prepared, resulting in a hierarchical porous composite material. This unique structure not only facilitates the transfer and diffusion of electrons and ions, but also provides more active sites, greatly improving the electrochemical performance. The composite material exhibits excellent reversible capacity, capacity retention, and cycling stability.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
David Csik, Gabriela Baranova, Robert Dzunda, Dora Zalka, Ben Breitung, Maria Hagarova, Karel Saksl
Summary: A high entropy composite coating was synthesized by oxidizing a high entropy alloy, AlCrFeCoNi, at high temperatures in a pure oxygen atmosphere. The coating consisted of a spinel-structured high entropy oxide and a metallic phase with a face-centered cubic structure, improving the electrical conductivity and electrochemical performance. The material showed excellent regeneration efficiency and high discharge capacity in lithium-ion batteries, making it a promising anode active material.
Article
Chemistry, Physical
Rui Yu, Rongli Jiang, Zihan Zhou
Summary: To solve the problem of capacity attenuation in SiO2 during charge and discharge, a rGO@yolk-shell SiO2 structure was designed using reduced graphene oxide as the conductive network and loading carbon-coated SiO2 as the yolk-shell structure. The yolk-shell structure effectively mitigates volume change without damaging the carbon layer, and the combination of rGO and the carbon layer enables efficient electron transport. As an anode material for lithium-ion batteries, rGO@yolk-shell SiO2 exhibits stable cycling performance with a capacity of 616 mAh g-1 after 358 cycles at 0.1 A g-1. (c) 2022 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Huan Xie, Yangyang Wan, Xiaoming Wang, Jiashun Liang, Gang Lu, Tanyuan Wang, Guoliang Chai, Nadia Mohd Adli, Cameron Priest, Yunhui Huang, Gang Wu, Qing Li
Summary: Bi-Pd single atom alloy (SAA) nanodendrites (NDs) exhibit high CO production rates and Faradic efficiencies, attributed to the decreased reaction barriers for H-2 formation and reduced free energy for *COOH generation resulted from Bi doping.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Zhendong Li, Li Cheng, Ke Zhang, Zhenhua Wang
Summary: Y doping improves the photocatalytic performance of BiFeO3, with Bi0.95Y0.05FeO3 showing the best activity due to its smaller particle size and lower rate of recombination of photogenerated electron-hole pairs.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Nan Wang, Yongnan Chen, Gang Wu, Zhen Zhang, Zhicheng Wu, Jinheng Luo
Summary: The evolution of low angle grain boundaries and Taylor factor in dual-phase steel during prestraining was investigated, showing a transition from plastic deformation dominated by soft ferrite phases to interface deformation. The hardening of ferrite was attributed to the formation of stable dislocation subgrain structures, leading to reduced strain hardening ability, increased yield strength, and decreased uniform elongation. The stress drop observed after strain hardening completion initiated plastic deformation directly at the interface, resulting in a mixed mode of failure involving both cleavage brittle and dimple ductile fracture. This study provides insights and experimental evidence for ferrite hardening behavior after prestraining in dual-phase steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Yongnan Chen, Zhicheng Wu, Gang Wu, Nan Wang, Qinyang Zhao, Jinheng Luo
Summary: The study showed that increasing strain rates in dual-phase steel leads to an increase in GNDs and LAGBs in ferrite, resulting in higher hardness. At lower strain rates, strain localization was observed within ferrite grains, while at higher strain rates, significant strain localization occurred at the ferrite/bainite interface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Review
Chemistry, Multidisciplinary
Zhi Qiao, Chenyu Wang, Yachao Zeng, Jacob S. Spendelow, Gang Wu
Summary: The insufficient stability of current carbon supported Pt and Pt alloy catalysts poses a significant barrier for proton-exchange membrane fuel cells. Efforts have been made to develop durable carbon-based supports with innovative nanostructure design and synthesis in recent years. Strategies to tailor carbon structures and enhance metal-support interactions have been summarized to improve support stability and performance of Pt catalysts in fuel cells.
Article
Chemistry, Physical
Xiaohang Li, Xiaoxuan Yang, Liting Liu, He Zhao, Yawei Li, Haiyan Zhu, Yuanzhen Chen, Shengwu Guo, Yongning Liu, Qiang Tan, Gang Wu
Summary: A nitrogen/sulfur codoped single iron site catalyst (Fe-N/S-C) prepared through chemical vapor deposition (CVD) showed superior catalytic activity for the oxygen reduction reaction (ORR) in alkaline media. The tuning of optimal charge distribution of Fe sites by N and S codoping and the suppression of iron-carbide-containing iron clusters formation contributed to the high performance of the catalyst. Further studies demonstrated its promising performance as a cathode catalyst in direct methanol fuel cells.
Article
Chemistry, Physical
Xiaoyu Zhang, Jiang Deng, Max Pupucevski, Sarawoot Impeng, Bo Yang, Guorong Chen, Sanchai Kuboon, Qingdong Zhong, Kajornsak Faungnawakij, Lirong Zheng, Gang Wu, Dengsong Zhang
Summary: The addition of molybdenum was found to improve both the activity and coking resistance of traditional nickel catalysts by restraining nickel oxidation and a unique MoOx <-> MoCxOy redox cycle.
Article
Chemistry, Multidisciplinary
Yan Kong, Yan Li, Xiahan Sang, Bin Yang, Zhongjian Li, Sixing Zheng, Qinghua Zhang, Siyu Yao, Xiaoxuan Yang, Lecheng Lei, Shaodong Zhou, Gang Wu, Yang Hou
Summary: This study reports a novel NRR electrocatalyst with a single Zn(I) site supported on hollow porous N-doped carbon nanofibers, exhibiting outstanding NRR activity in alkaline media for high NH3 yield rate. The atomically dispersed Zn(I) sites are likely the active sites, and the nearby graphitic N site facilitates the NRR process. In-situ measurements and theoretical calculations reveal that the formation of initial *NNH intermediate is the rate-limiting step, and the graphitic N atoms adjacent to Zn-N-4 moieties lower the energy barrier to accelerate hydrogenation kinetics during NRR.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Megumi Ihara, Luxia Cui, Yuto Konishi, Yoshio Hisaeda, Toshikazu Ono
Summary: The study successfully controlled the aggregation state of two new covalently bonded dinuclear boron-based dye complexes to fabricate white-light-emitting materials that exhibit blue and orange emission. One of the complexes has a photoluminescence quantum yield of 16% in the solid state, highlighting the importance of molecular engineering through the control of dye aggregation for creating novel functional materials with interesting optical properties.
Article
Chemistry, Multidisciplinary
Luxia Cui, Hyuga Shinjo, Takafumi Ichiki, Koichi Deyama, Takunori Harada, Kohei Ishibashi, Takumi Ehara, Kiyoshi Miyata, Ken Onda, Yoshio Hisaeda, Toshikazu Ono
Summary: This study reports the synthesis of tetraboron difluoride complexes and their excellent optical properties. By altering the bending angle of the molecules, these complexes exhibit green-to-orange luminescence and the color can be controlled by the aggregation state.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Electrochemistry
Ying Wei, Yuwei Wu, Xiaoman Cao, Luxia Cui, Jiaqi Chen, Qiong Wu, Daliang Liu, Zhijia Sun, Qingguo Zhang
Summary: Precisely controlling the calcination temperature to adjust the porous architectures of ultrathin NiO nanosheets can significantly enhance the performance of supercapacitors.
Article
Chemistry, Physical
Luxia Cui, Momoka Maeda, Yoshio Hisaeda, Toshikazu Ono
Summary: In this study, rationally designed unsymmetric tri-BF2 red to near-infrared emitters were synthesized using a facile one-pot synthetic approach. The structures and properties of these emitters were characterized by single-crystal structures and density functional theory calculations. The results showed that the emitters exhibited high photoluminescence quantum yield at room temperature and intense fluorescence at low temperature, which can be attributed to increased molecular flexibility and enhanced intramolecular charge transfer interactions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Luxia Cui, Koichi Deyama, Takafumi Ichiki, Yuto Konishi, Ami Horioka, Takunori Harada, Kohei Ishibashi, Yoshio Hisaeda, Toshikazu Ono
Summary: In this study, novel axially chiral tetra-BF2 complexes with terthiophene modification were synthesized and their photophysical properties were investigated. The terthiophene modification played a crucial role in extending the pi-conjugation and improving intramolecular charge transfer interactions, resulting in different emission colors and high circularly polarized luminescence performance. This work provides a new strategy for developing organic circularly polarized luminescent materials with tunable emission colors and high efficiency.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Takashi Ikeda, Keishiro Tahara, Ryoichi Ishimatsu, Toshikazu Ono, Luxia Cui, Momoka Maeda, Yoshiki Ozawa, Masaaki Abe
Summary: This study presents a method for stabilizing electrogenerated radical ions by effectively decorating organic donor-acceptor diads with B(C6F5)(3). By employing the p-type organic semiconductor benzothienobenzothiophene (BTBT) as the donor, tetracoordinate boron complexes show improved solution electrochemiluminescence (ECL) intensity. The Lewis-pairing-induced ECL enhancement is attributed to the multiple roles of B(C6F5)(3) in redistributing frontier orbitals, facilitating electrochemical excitation, and restricting molecular motions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yi Li, Hemanth Somarajan Pillai, Teng Wang, Sooyeon Hwang, Yun Zhao, Zhi Qiao, Qingmin Mu, Stavros Karakalos, Mengjie Chen, Juan Yang, Dong Su, Hongliang Xin, Yushan Yan, Gang Wu
Summary: Low-temperature direct ammonia fuel cells (DAFCs) are promising with PtIrZn/CeO2-ZIF-8 as a catalyst for efficient ammonia oxidation reaction, improving the performance of the fuel cells.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
