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China Functional Material technology and Industry Forum, 2016

作者： Gu, Chun Luo, Guo-Qiang Zhang, Rui-Zhi Zhang, Jian Li, Yuan Li, Mei-Juan Shen, Qiang Zhang, Lian-Meng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783035710526

In this work, monodispersed silver nanoparticles with controllab.e size have been successfully in situ synthesized in PMMA matrix. NaHS, HCl and poly(vinyl pyrrolidone) (PVP) were used to optimize the nucleation and growth of silver nanocrystalline. UV-vis analysis and transmission electron microscopy (TEM) were used to characterize the size and dispersion of silver nanoparticles in the Ag/PMMA nanocomposites. The results show that silver nanoparticles homogeneously distribute in PMMA/DMF sol and the particle size of silver nanoparticles increase with the increasing of time. The nucleation of Ag atoms can be facilitated through the addition of a trace amount of NaHS to generate Ag2S clusters as heterogeneous nuclei. Introducing a trace amount of Cl- into the reaction system can effectively reduce the growth rate of the nanoparticles and thus generating more uniform silver nanoparticles in PMMA matrix. © 2017 Trans Tech Publications.

关键词： Silver nanoparticles

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Simplified synthesis and luminous mechanism of Eu2+-doped α-Si3N4 nanowires with strong green luminescent properties

Simplified synthesis and luminous mechanism of Eu2+-doped α...

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China Functional Material technology and Industry Forum, 2016

作者： Su, Rui Huang, Zhi-Feng Chen, Fei Shen, Qiang Zhang, Lian-Meng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783035710526

Ultra-long, single crystal, Eu-doped α-Si3N4 nanowires were prepared by a simple approach involving nitriding Eu-doped cryomilled nanocrystalline Si powder in NH3 flow at 1350°C for 4 h. Phases, chemical composition and microcosmic feature of cryomilled powders and as-prepared nanowires were tested by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), respectively. The results suggested that Eu was successfully introduced into Si lattice after the cryomilling process and then entered into the lattice of α-Si3N4 during the nitridation process. The as-synthesized Eu-doped α-Si3N4 nanowires had highly uniform dimension with 20-30 nm in diameter and ∼100 μm in length. The room temperature photoluminescence (PL) spectrum of as-synthesized nanowires showed a broad band emission center at 570 nm which was attributed to the transition from 4f65d to 4f7 in Eu2+. The transition from Eu3+ to Eu2+ during nitridation process was tested by X-ray photoelectron spectroscopy (XPS). © 2017 Trans Tech Publications.

关键词： Nanowires

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A TiSe2-Graphite Dual Ion Battery: Fast Na-Ion Insertion and Excellent Stability

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Angewandte Chemie 2021年第34期133卷

作者： Runtian Zheng Haoxiang Yu Xikun Zhang Yang Ding Maoting Xia Dr. Kangzhe Cao Prof. Jie Shu Prof. Alexandru Vlad Prof. Bao-Lian Su School of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 Zhejiang China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles 5000 Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China Henan Province Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan Xinyang Normal University Xinyang 464000 Henan China Institute of Condensed Matter and Nanosciences Université Catholique de Louvain Place Louis Pasteur 1L4.01.02 1348 Louvain-la-Neuve Belgium

The sodium dual ion battery (Na-DIB) technology is proposed as highly promising alternative over lithium-ion batteries for the stationary electrochemical energy-storage devices. However, the sluggish reaction kinetics of anode materials seriously impedes their practical implementation. Herein, a Na-DIB based on TiSe 2 -graphite is reported. The high diffusion coefficient of Na-ions (3.21×10 −11 –1.20×10 −9 cm 2 s −1 ) and the very low Na-ion diffusion barrier (0.50 eV) lead to very fast electrode kinetics, alike in conventional surface capacitive storage systems. In-situ investigations reveal that the fast Na-ion diffusion involves four insertion stage compositions. A prototype cell shows a reversible capacity of 81.8 mAh g −1 at current density of 100 mA g −1 , excellent stability with 83.52 % capacity retention over 200 cycles and excellent rate performance, suggesting its potential for next-generation large scale high-performance stationary energy storage systems.

关键词： dual-ion batteries graphite cathodes reaction mechanisms sodium TiSe2

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Frontispiz: A TiSe2-Graphite Dual Ion Battery: Fast Na-Ion Insertion and Excellent Stability

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Angewandte Chemie 2021年第34期133卷

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Frontispiece: A TiSe2-Graphite Dual Ion Battery: Fast Na-Ion Insertion and Excellent Stability

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Angewandte Chemie International Edition 2021年第34期60卷

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Polycyclic Aromatic Hydrocarbons as a New Class of Promising Cathode materials for Aluminum-Ion Batteries

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Angewandte Chemie 2021年第3期134卷

作者： Dr. Dongqing Kong Dr. Tonghui Cai Haodong Fan Dr. Haoyu Hu Xiaohui Wang Yongpeng Cui Dandan Wang Yesheng Wang Prof. Dr. Han Hu Mingbo Wu Prof. Dr. Qingzhong Xue Prof. Dr. Zifeng Yan Xuejin Li Lianming Zhao Wei Xing State Key Laboratory of Heavy Oil Processing China University of Petroleum Qingdao 266580 P. R. China Weifang Key Lab of Advanced Light Materials Manufacturing and Forming Weifang University of Science and Technology Weifang 262700 P. R. China Department of Materials Chemistry School of Materials Science and Engineering China University of Petroleum Qingdao 266580 P. R. China Department of Materials Physics School of Materials Science and Engineering China University of Petroleum Qingdao 266580 P. R. China

As an emerging post-lithium battery technology, aluminum ion batteries (AIBs) have the advantages of large Al reserves and high safety, and have great potential to be applied to power grid energy storage. But current graphite cathode materials are limited in charge storage capacity due to the formation of stage-4 graphite-intercalated compounds (GICs) in the fully charged state. Herein, we propose a new type of cathode materials for AIBs, namely polycyclic aromatic hydrocarbons (PAHs), which resemble graphite in terms of the large conjugated π bond, but do not form GICs in the charge process. Quantum chemistry calculations show that PAHs can bind AlCl 4 − through the interaction between the conjugated π bond in the PAHs and AlCl 4 − , forming on-plane interactions. The theoretical specific capacity of PAHs is negatively correlated with the number of benzene rings in the PAHs. Then, under the guidance of theoretical calculations, anthracene, a three-ring PAH, was evaluated as a cathode material for AIBs. Electrochemical measurements show that anthracene has a high specific capacity of 157 mAh g −1 (at 100 mA g −1 ) and still maintains a specific capacity of 130 mAh g −1 after 800 cycles. This work provides a feasible “theory guides practice” research model for the development of energy storage materials, and also provides a new class of promising cathode materials for AIBs.

关键词： Aluminum ion batteries Anthracene Cathode materials Conjugated π bond Polycyclic aromatic hydrocarbons

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FeSe2 clusters with excellent cyclab.lity and rate capabilityfor sodium-ion batteries

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Nano Research 2017年第9期10卷 3202-3211页

作者： Xiujuan Wei Chunjuan Tang Qinyou An Mengyu Yan Xuanpeng Wang Ping Hu Xinyin Cai Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Mathematics and Physics Luoyang Institute of Science and Technology Luoyang 471023 China Department of Chemistry University of Cafifornia Berkeley Cafifornia 94720 USA

Sodium-ion batteries (SIBs) have great promise for sustainable and economical energy-storage applications. Nevertheless, it is a major challenge to develop anode materials with high capacity, high rate capability, and excellent cycling stability for them. In this study, FeSe2 clusters consisting of nanorods were synthesized by a facile hydrothermal method, and their sodium-storage properties were investigated with different electrolytes. The FeSe2 clusters delivered high electrochemical performance with an ether-based electrolyte in a voltage range of 0.5–2.9 V. A high discharge capacity of 515 mAh·g–1 was obtained after 400 cycles at 1 A·g–1, with a high initial columbic efficiency of 97.4%. Even at an ultrahigh rate of 35 A·g–1, a specific capacity of 128 mAh·g–1 was achieved. Using calculations, we revealed that the pseudocapacitance significantly contributed to the sodium-ion storage, especially at high current rates, leading to a high rate capability. The high comprehensive performance of the FeSe2 clusters makes them a promising anode material for SIBs.

关键词： FeSe_2 clusters superior rate capability excellent cycling stability sodium-ion batteries pseudocapacitive behavior

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Engineering a Local Free Water Enriched Microenvironment for Surpassing Platinum Hydrogen Evolution Activity

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Angewandte Chemie 2022年第35期134卷

作者： Qunlei Wen Junyuan Duan Wenbin Wang Dr. Danji Huang Dr. Youwen Liu Dr. Yongliang Shi Prof. JiaKun Fang Prof. Anmin Nie Prof. Huiqiao Li Prof. Tianyou Zhai State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China Contribution: Conceptualization (equal) Investigation (lead) Writing - original draft (lead) Contribution: Formal analysis (equal) Investigation (equal) Contribution: Investigation (supporting) Writing - original draft (supporting) State Key Lab of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China Contribution: Formal analysis (supporting) Investigation (supporting) Contribution: Conceptualization (lead) Formal analysis (lead) Writing - review & editing (lead) Center for Spintronics and Quantum Systems State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an Shanxi 710049 P. R. China Contribution: Investigation (lead) Writing - review & editing (equal) Contribution: Conceptualization (supporting) Formal analysis (equal) Investigation (equal) Writing - review & editing (equal) Center for High Pressure Science State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao Hebei 066004 P. R. China Contribution: Formal analysis (equal) Contribution: Writing - review & editing (equal) Contribution: Conceptualization (supporting) Project administration (lead) Supervision (equal) Writing - review & editing (equal)

Manipulating the catalyst–electrolyte interface to push reactants into the inner Helmholtz plane (IHP) is highly desirable for efficient electrocatalysts, however, it has rarely been implemented due to the elusive electrochemical IHP and inherent inert catalyst surface. Here, we propose the introduction of local force fields by the surface hydroxyl group to engineer the electrochemical microenvironment and enhance alkaline hydrogen evolution activity. Taking a hydroxyl group immobilized Ni/Ni 3 C heterostructure as a prototype, we reveal that the local hydrogen bond induced by the surface hydroxyl group drags 4-coordinated hydrogen-bonded H 2 O molecules across the IHP to become free H 2 O and thus continuously supply reactants forcatalytic sites catalytic sites. In addition, the hydroxyl group coupled with the Ni/Ni 3 C heterostructure further lowers the water dissociation energy by polarization effects. As a direct outcome, hydroxyl-rich catalysts surpass Pt/C activity at high current density (500 mA cm −2 @ ≈276 mV) in alkaline medium.

关键词： Electrochemical Double Layer High Current Densities Hydrogen Evolution Local Hydrogen Bond Surface Hydroxyl

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Nonadiabatic Effects in Raman Spectra of AlCl4−-graphite Based Batteries

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Physical Review Applied 2019年第2期12卷 024016-024016页

作者： Dino Novko Qian Zhang Payam Kaghazchi Center of Excellence for Advanced Materials and Sensing Devices Institute of Physics Bijenička 46 Zagreb 10000 Croatia Donostia International Physics Center (DIPC) Paseo Manuel de Lardizabal 4 Donostia-San Sebastián 20018 Spain State Key Laboratory Base of Eco-chemical Engineering Qingdao University of Science and Technology Qingdao China College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao China Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK-1) Materials Synthesis and Processing Jülich 52425 Germany

Raman spectroscopy is one of the most valuable experimental techniques for quality assessment and structural characterization of sample materials. As such, it has been applied to understand the mechanism of the staging of anions and cations into graphite-based electrodes in a variety of energy storage devices such as Al batteries, dual-ion cells, and Li-ion batteries. However, the correlation between the Raman peaks and intercalation stages is still unclear in most of these systems. This is due to the fact that the modeling of electron-phonon coupling in highly doped graphite systems is beyond the standard Born-Oppenheimer approximation. Here, we simulate the Raman peaks for AlCl4−-intercalated graphite in Al batteries by using a nonadiabatic coupling theory. Specifically, we successfully correlate the Raman peaks of the G phonon in AlCl4−-doped graphite with experiment for intercalation stages 1, 2, and 4, while stage 3 appears to be absent. Stages 1 and 2 have not been observed in experimental XRD patterns. We therefore believe that the AlCl4−-graphite intercalation compound has a core-shell structure with a maximum stage of 4 or 3 in the core and 2 or 1 in the shell. In addition, the observed intense narrow Raman bands for the Al-ion battery cathode are due to the high level of graphite doping and are explained in terms of low electron-phonon decay rates.

关键词： Electrochemistry Electron-phonon coupling Ionic transport Batteries Carbon-based materials Energy materials Density functional calculations Raman spectroscopy

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In-Situ Growing Mesoporous CuO/O-Doped g-C3N4 Nanospheres for Highly Enhanced Lithium Storage

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ACS applied materials & interfaces 2019年第36期11卷 32957-32968页

作者： Hemdan S H Mohamed Liang Wu Chao-Fan Li Zhi-Yi Hu Jing Liu Zhao Deng Li-Hua Chen Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei P. R. China. Physics Department Faculty of Science Fayoum University El Gomhoria Street 63514 Fayoum Egypt. Nanostructure Research Centre (NRC) Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei P. R. China. Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium.

The development of lithium-ion batteries using transition metal oxides has recently become more attractive, due to their higher specific capacities, better rate capability, and high energy densities. Herein, the in situ growth of advanced mesoporous CuO/O-doped g-CN nanospheres is carried out in a two step hydrothermal process at 180 °C and annealing in air at 300 °C. When used as an anode material, the CuO/O-doped g-CN nanospheres achieve a high reversible discharge specific capacity of 738 mAhg and a capacity retention of ∼75.3% after 100 cycles at a current density 100 mAg compared with the pure CuO (412 mAhg, 47%) and O-doped g-CN (66 mAhg, 53%). Even at high current density 1 Ag, they exhibit a reversible discharge specific capacity of 503 mAhg and capacity retention ∼80% over 500 cycles. The excellent electrochemical performance of the CuO/O-doped g-CN nanocomposite is attributed to the following factors: (I) the in situ growing CuO/O-doped g-CN avoids CuO nanoparticle aggregation, leading to the improved lithium ion transfer and electrolyte penetration inside the CuO/O-doped g-CN anode, thus promoting the utilization of CuO; (II) the porous structure provides efficient space for Li transfer during the insertion/extraction process to avoid large volume changes; (III) the O-doping g-CN decreases its band gap, ensuring the increased electrical conductivity of CuO/O-doped g-CN; and (IV) the strong interaction between CuO and O-doped g-CN ensures the stability of the structure during cycling.

关键词： CuO g-CN in situ growth lithium-ion batteries reaction kinetics

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