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Hydrogel-derived nitrogen-doped porous carbon framework with vanadium nitride decoration for supercapacitors with superior cycling performance

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Journal of Materials Science & Technology 2023年第24期155卷 167-174页

作者： Ziqiang Wu Qian Chen Changdian Li Lili zhu Yanan Huang Xiaoguang zhu xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 China University of Science and Technology of China Hefei 230026 China High Magnetic Field Laboratory HFIPS Chinese Academy of Sciences Hefei 230031 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Transition metal nitrides(TMNs)and their composites with carbon materials hold tremendous potential for supercapacitor(SC)electrodes because of their excellent electronic conductivity and electrochemical ***,realizing cycling stable TMN/carbon-based supercapacitors with economically viable and environmentally-friendly approaches remains a significant ***,polyacrylamide(PAM)hydrogel,as a water-soluble linear polymer electrolyte,is expected to be a remarkable candidate precursor for preparing N-doped porous carbon(NPC)due to the high contents of carbon and nitrogen *** this study,vanadium nitride(VN)embedded in PAM hydrogel-derived NPC was fabricated successfully via an ammonia-free *** VN/NPC delivers a high specific capacitance of 198.3 F g^(−1)at a current density of 1 A g^(−1),with a remarkable cycling stability of 107%after 16,000 *** electrochemical performances of VN/NPC compared to bare VN nanoparticles are strongly improved due to the composite ***,the VN/NPC-based solid-state symmetric device delivers an excellent energy density of 21.97µWh cm^(−2)at a power density of 0.5 mW cm^(−2),and an outstanding cycling durability of 90.9%after 18,000 *** work paves the way to design metal nitride/porous carbon materials,which also opens up unique horizons for the recovery of hydrogel electrolyte.

关键词： Vanadium nitride Nitrogen-doped porous carbon Polyacrylamide Hydrogel Supercapacitor

Realization of high-purity 1T-MoS_(2)by hydrothermal synthesis through synergistic effect of nitric acid and ethanol for supercapacitors

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Journal of Materials Science & Technology 2022年第28期123卷 34-40页

作者： Han Li Hui Li Ziqiang Wu Lili zhu Changdian Li Shuai Lin xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China High Magnetic Field Laboratory HFIPSChinese Academy of SciencesHefei 230031China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Phase engineering of molybdenum disulfide(MoS_(2))can achieve phase transformation from the semiconducting phase(2H-MoS_(2))with poor conductivity to the metallic phase(1T-MoS_(2))with superior electrochemical ***,it is desirable to prepare high concentration 1T-MoS_(2)by simple and facile *** this work,MoS_(2)with high concentration of 1T phase is successfully prepared by one-pot hydrothermal synthesis through the synergistic effect of HNO_(3)and CH_(3)CH_(2)OH,which is stable for more than half of a *** as-synthesized MoS_(2)shows high capacitance of 392Fg^(-1)at 1A g^(-1)as used for supercapacitors electrodes,and displays excellent capacitance retention(83%after 10,000 cycles).Asymmetric supercapacitors(ASCs)devices assembled by the as-synthesized MoS_(2)and MnO_(2)on carbon cloths,exhibit high energy and power densities(0.194 m Wh cm^(-2)and 13.466 mW cm^(-2)).These results shed a light to realize 1T phase MoS_(2)through the synergistic effect in hydrothermal processing.

关键词： MoS_(2) Metallic phase Synergistic effect Hydrothermal synthesis Supercapacitor

Metal/antiperovskite metal nitride composites Ag/AgNNi_(3)as novel efficient electrocatalysts for hydrogen evolution reaction in alkaline media

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Journal of Materials Science & Technology 2022年第17期112卷 222-229页

作者： Lili zhu Bingbing Yang Ziqiang Wu Changdian Li Han Li Hui Li Yanan Huang Xiaoguang zhu xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China High Magnetic Field Laboratory HFIPSChinese Academy of SciencesHefei 230031China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Searching for effective hydrogen evolution reaction(HER)electrocatalysts is crucial for water *** metal nitrides(TMNs)are very attractive potential candidates since of high electrical conductivity,robust stability,element rich and high *** metal nitrides provide chemical flexibility since two different types of transition metal elements are contained,allowing partial substitution both for A-and ***,we report a novel antiperovskite metal nitride Ag_(x)Ni_(1-x)NNi_(3)(0≤x≤0.80)thin film used as highly effective HER *** phase antiperovskite nitride can be successfully obtained for Ag_(x)Ni_(1-x)NNi_(3)with x less than *** Ag_(0.76)Ni_(0.24)NNi_(3) towards HER shows an overpotential of 122 mV at 10 mA cm^(-2)in alkaline ***,considering the role of Ag for adsorbing hydroxyl groups,chemical engineering has been carried out for designing metal/antiperovskite nitride Ag/Ag_(x)Ni_(1-x)NNi_(3)composite *** 0.18 Ag/Ag_(0.80)Ni_(0.20)NNi_(3)electrocatalyst shows a mere 13 and 81 mV of overpotential to reach 1 and 10 mA cm^(-2),respectively,showing high durability in alkaline *** results will provide a novel type of HER catalysts based on antiperovskite metal nitrides and a strategic design for metal/antiperovskite metal nitride composite electrocatalysts for HER in alkaline media.

关键词： Hydrogen evolution reaction Antiperovskite Metal nitride Composite catalyst

Preparation and Characterization of Ca_3Co_4O_9 Thin Films on Polycrystalline Al_2O_3 Substrates by Chemical Solution Deposition

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Journal of Materials Science & Technology 2013年第1期29卷 13-16页

作者： Yankun Fu Xianwu Tang Jie Yang Hongbin Jian xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences College of Science Shandong University of Science and Technology

Ca3Co409 thin films have been first prepared on polycrystalline AI203 substrates using chemical solution deposition method by multiple annealing processing. It is observed that the derived thin films are c-axis oriented although the substrates are polycrystalline AI203 substrates, suggesting the self-assembled c-axis orientation. The annealing temperature effects on the properties are investigated and discussed. The best performances are attributed to the 850 ℃-annealed sample, whose resistivity, Seebeck coefficient and power factor at 300 K are 7.4 mΩ cm, 117 μV/K and 0.18 mW/m K-2 respectively, which is even better than those of the thin films deposited on single crystal substrates. The results will provide an effective route to optimize the properties of Ca3Co409 thin films using chemical solution deposition by multiple annealing processing even the substrates are polycrystalline.

关键词： Chemical solution deposition Thermoelectric Cobaltate

Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries

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Journal of Materials Science & Technology 2019年第6期35卷 994-1002页

作者： Bozhou Chen Bangchuan Zhao Jiafeng Zhou Zhitang Fang Yanan Huang xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China University of Science and Technology of China Hefei 230026 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China

A couple of layered Li-rich cathode materials Li1.2Mn0.54Ni0.13Co0.13O2 without any carbon modification are successfully synthesized by solvothermal and hydrothermal methods followed by a calcination process. The sample synthesized by the solvothermal method(S-NCM) possesses more homogenous microstructure, lower cation mixing degree and more oxygen vacancies on the surface, compared to the sample prepared by the hydrothermal method(H-NCM). The S-NCM sample exhibits much better cycling performance, higher discharge capacity and more excellent rate performance than H-NCM. At 0.2 C rate,the S-NCM sample delivers a much higher initial discharge capacity of 292.3 mAh g^-1 and the capacity maintains 235 m Ah g^-1 after 150 cycles(80.4% retention), whereas the corresponding capacity values are only 269.2 and 108.5 m Ah g^-1(40.3% retention) for the H-NCM sample. The S-NCM sample also shows the higher rate performance with discharge capacity of 118.3 mAh g^-1 even at a high rate of 10 C, superior to that(46.5 m Ah g^-1) of the H-NCM sample. The superior electrochemical performance of the S-NCM sample can be ascribed to its well-ordered structure, much larger specific surface area and much more oxygen vacancies located on the surface.

关键词： Li-rich cathode oxide material Oxygen vacancy Solvothermal method Electrochemical performance

Magnetic and microwave absorption properties of Ni_(1-x)Zn_xFe_2O_4 nanocrystalline synthesized by sol-gel method

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Science China(Technological Sciences) 2013年第1期56卷 13-19页

作者： ZHANG Min LIU QiangChun ZI ZhenFa DAI YuQiang zhu xuebin SUN YuPing DAI JianMing Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of Sciences School of Physics and Electronics Information Huaibei Normal University

Ni1-xZnxFe2O4(0≤x≤1,in steps of 0.1) nanocrystallines were synthesized by sol-gel *** doping effects of zinc on structural,magnetic and microwave absorption properties were investigated in detail.X-ray diffraction(XRD) results show that all the samples are single-phase spinel *** magnetic and microwave absorption properties are strongly dependent on the zinc content,which can be understood in terms of the cations redistribution in spinel tetrahedral and octahedral sites with the increase of zinc *** magnetic measurement shows the antiferromagnetic nature of the samples for x=0.9 and x=*** saturation magnetization reaches the maximum of 3.35μB/*** x=*** optimal reflection loss(RL) of-29.6 dB is found at 6.5 GHz for an absorber thickness of 5 *** RL values exceeding 10 dB are obtained for the absorber in the range of 3.9-8.9 *** Ni1-xZnxFe2O4 nanocrystallines may be attractive candidates for electromagnetic wave absorption materials.

关键词： Ni-Zn ferrite magnetic measurement microwave absorption properties

One-step hydrothermal synthesis of few-layered metallic phase MoS2 for high-performance supercapacitors

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Progress in Natural Science:Materials International 2024年第2期34卷 429-436页

作者： Jing Xu Xulong Yuan Yujie Zhao Shaoqi Rui Qingling Jia Han Li Shun Lu Bing Li Yongxing Zhang xuebin zhu Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Anhui Province Key Laboratory of Intelligent Computing and Applications Anhui Province Industrial Generic Technology Research Center for Alumics Materials Huaibei Normal University Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Key Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences

In recent years,molybdenum disulfide（MoS2） has gained significant attention in the scientific *** MoS2demonstrates unique properties and potential ***,the synthesis of few-layered and high-purity 1T-MoS2is still a *** this study,we successfully employed a hydrothermal method to synthesize few-layered and high-purity *** purity of the material is controlled by a combination of sodium borohydride and ***,the few-layered 1T-MoS2exhibits exceptional performance as a supercapacitor,including the high specific capacitance(250.3 F g-1at a current density of 1 A g-1) and excellent long-trem cycling stability（90.7 % after 5000 cycles）.Meanwhile,the asymmetric device assembled by 6-FL-1TMoS2and active carbon on carbon cloths exhibits excellent flexibility and high energy and power density(23.1μWh cm-2at 600 μW cm-2,55 μWh cm-2at 12000 μW cm-2).This work provides valuable insights into the synthesis of few-layered and high-purity 1T-MoS2,opening up new avenues for further research and applications.

关键词： 1T-MoS2 Few-layered High-purity One-pot hydrothermal method Supercapacitor

Design of flexible inorganic BiFe_(0.93)Mn_(0.07)O_(3) ferroelectric thin films for nonvolatile memory

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Journal of Materiomics 2020年第3期6卷 600-606页

作者： Bingbing Yang Chenhui Li Miao Liu Renhuai Wei Xianwu Tang Ling Hu Wenhai Song xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei230031China University of Science and Technology of China Hefei230026China High Magnetic Field Laboratory Chinese Academy of SciencesHefei230031China

Flexible ferroelectric memories,endowing with high data storage density,provide a chance for the nextgeneration wearable ***,flexible inorganic Mn-doped BiFeO_(3) thin films were directly integrated on fluorophlogopite mica(F-Mica)substrates by an easy and low-cost all solution chemical solution deposition(AS-CSD)*** integration of LaNiO_(3) buffer layer can improve the film surface density and *** flexible characteristic can be achieved by reducing the thickness of F-Mica substrates for the ferroelectric thin *** contrast to BiFe_(0.93)Mn_(0.07)O_(3)/LaNiO_(3)/Si thin film deposited on rigid substrates(Si),the BiFe_(0.93)Mn_(0.07)O_(3)/LaNiO_(3)/F-mica fabricated on F-Mica show better ferroelectric performances due to the improved crystal growth and less *** importantly,the obtained BiFe_(0.93)Mn_(0.07)O_(3)/LaNiO_(3)/F-mica ferroelectric thin films still show large remnant polarization of Pr ~64 μC/cm^(2)(deterioration of ~7.2%),good antifatigue properties up to 1.2×10^(8) cycles and outstanding retention behaviors for 1.6×10^(4) s after continuous *** work will provide a feasible route to fabricate flexible inorganic ferroelectric thin films through low-cost solution method and show attractive comprehensive performances in next-generation wearable smart devices.

关键词： Inorganic ferroelectric Flexible electronics Lead-free BiFe_(0.93)Mn_(0.07)O_(3)

Design Rules Discussion for Improving Multi-axle Vehicle Stability

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计算机辅助工程 2006年第B9期15卷 1-3页

作者： zhu xuebin JIANG Yingquan GAO Feng Beijing Institute of Special Eng. Machinery Beijing 100076 China Beihang Univ. Beijing 100083 China

A whole vehicle dynamic model is built, and the modeling method of connected hydragas spring suspension and multi-axle grouping steer system is also explained. Firstly, a kinematical analysis of suspension is implemented to achieve optimized suspension geometry parameters according to the stable requirement. Then, based on the evaluation of whole vehicle handling character with regard to various tire characters, driving configurations and super structures, the design rules are summarized to improve the stability of multi-axle vehicle.

关键词： multi-axle vehicle stability MSC Adams