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Electrolyte Engineering Toward High-Voltage Aqueous Energy Storage Devices

Energy & Environmental materials 2021年第3期4卷 302-306页

作者： Jianfeng Tan Jinping Liu School of Chemistry Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China State Center for International Cooperation on Designer Low-carbon&Environmental Materials and School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Aqueous electrochemical energy storage(EES)devices are highly safe,environmentally benign,and inexpensive,but their operating voltage and energy density must be increased if they are to efficiently power multifunctional electronics,new-energy cars as well as to be used in smart *** Minireview summarizes the key breakthroughs and progress in expanding the electrochemical stability window(ESW)of aqueous EES devices over the past five *** briefly introducing the electrode engineering ways to widen ESW,we focus on four ground-breaking electrolyte engineering strategies and classify them into two kinds from the perspective of salts and exotic solutes/*** widening degree toward ESW of these emerging electrolytes is compared and the universal fundamental mechanism relating to the interactions between limited water molecules and high-concentration salts(or large amounts of exotic solutes/solvents)is *** challenges and perspectives for high-ESW electrolytes as well as recent advances in low-cost and other metal ion(sodium,potassium,zinc,etc.)-based electrolytes for expanding ESW are also outlined.

关键词： aqueous energy storage systems electrolyte engineering high voltage high-energy density water electrolysis

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Rational design of hierarchically porous Fe-N-doped carbon as efficient electrocatalyst for oxygen reduction reaction and Zn-air batteries

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Nano Research 2021年第12期14卷 4768-4775页

作者： Zihan Meng Neng Chen Shichang Cai Jiawei Wu Rui Wang Tian Tian Haolin Tang Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China School of Material Science and Engineering Henan University of TechnologyZhengzhou450001China

The rational design and construction of hierarchically porous nanostructure for oxygen reduction reaction (ORR) electrocatalysts is crucial to facilitate the exposure of accessible active sites and promote the mass/electron transfer under the gas-solid-liquid triple-phase condition. Herein, an ingenious method through the pyrolysis of creative polyvinylimidazole coordination with Zn/Fe salt precursors is developed to fabricate hierarchically porous Fe-N-doped carbon framework as efficient ORR electrocatalyst. The volatilization of Zn species combined with the nanoscale Kirkendall effect of Fe dopants during the pyrolysis build the hierarchical micro-, meso-, and macroporous nanostructure with a high specific surface area (1,586 m^(2)·g^(−1)), which provide sufficient exposed active sites and multiscale mass/charge transport channels. The optimized electrocatalyst exhibits superior ORR activity and robust stability in both alkaline and acidic electrolytes. The Zn-air battery fabricated by such attractive electrocatalyst as air cathode displays a higher peak power density than that of Pt/C-based Zn-air battery, suggesting the great potential of this electrocatalyst for Zn-air batteries.

关键词： hierarchically porous structure Fe-N-doped carbon electrocatalysts oxygen reduction reaction Zn-air batteries

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Operating conditions combination analysis method of optimal water management state for PEM fuel cell

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Green Energy and Intelligent Transportation 2023年第4期2卷 28-42页

作者： Wenxin Wan Yang Yang Yang Li Changjun Xie Jie Song Zhanfeng Deng Jinting Tan Ruiming Zhang School of Automation Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan430070China Department of Electrical Engineering Chalmers University of TechnologyGothenburg41258Sweden Modern Industry College of Artificial Intelligence and New Energy Vehicles Wuhan University of TechnologyWuhan430070China Global Energy Interconnection Research Institute Beijing102211China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Guangdong Hydrogen Energy Institute of Wuhan University of Technology Foshan528000China

The water content of proton exchange membrane fuel cells(PEMFCs)affects the transport of reactants and the conductivity of the *** water management measures can improve the performance and extend the lifespan of the fuel *** water management state of the stack is influenced by various external operating conditions,and optimizing the combination of these conditions can improve the water management state within the *** that the stack's internal resistance can reflect its water management state,this study first establishes an internal resistance-operating condition model that considers the coupling effect of temperature and humidity to determine the variation trend of total resistance and stack humidity with single-factor operating ***,the water management state optimization method based on the ANN-HGPSO algorithm is proposed,which not only quantitatively evaluates the influence weights of different operating conditions on the stack's internal resistance but also efficiently and accurately obtains the optimal combination of five operating conditions:working temperature,anode gas pressure,cathode gas pressure,anode gas humidity,and cathode gas humidity to achieve the optimal water management state in the stack,within the entire range of current ***,the response surface experimental results of the stack also validate the effectiveness and accuracy of the ANN-HGPSO *** method mentioned in this article can provide effective strategies for efficient water management and output performance optimization control of PEMFC stacks.

关键词： PEMFC Water management statue Internal resistance-operating condition model Operating condition optimization Response surface method

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Nitrogen‐doped tin oxide electron transport layer for stable perovskite solar cells with efficiency over 23%

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Interdisciplinary materials 2022年第2期1卷 309-315页

作者： Yanping Mo Chao Wang Xuntian Zheng Peng Zhou Jing Li Xinxin Yu Kaizhong Yang Xinyu Deng Hyesung Park Fuzhi Huang Yi‐Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanP.R.China Solar Hydrogen Production Lab Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanP.R.China International School of Materials Science and Engineering Wuhan University of TechnologyWuhanP.R.China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsanRepublic of Korea

Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition ***,tin oxide often contains pernicious defects,resulting in unsatisfactory ***,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar *** aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and ***,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalab.e strategy has shown great promise toward highly efficient and stable PSCs.

关键词： electron transport layer N doping perovskite solar cell SnO_(2)

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三维分级复合固态电解质用于增强全固态锂金属电池界面相容性

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Science China materials 2023年第2期66卷 522-530页

作者：吴梦君宋江平朱欣欣詹慧田甜王锐雷家珩唐浩林 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

复合固体电解质结合了聚合物固体电解质和无机固态电解质的优势,被认为是用于高能量密度全固态锂金属电池最有前景的电解质.但是,电极/电解质界面相容性差以及填料团聚阻碍了复合固态电解质的实用化进程.为解决上述问题,本文利用硅烷偶... 详细信息

复合固体电解质结合了聚合物固体电解质和无机固态电解质的优势,被认为是用于高能量密度全固态锂金属电池最有前景的电解质.但是,电极/电解质界面相容性差以及填料团聚阻碍了复合固态电解质的实用化进程.为解决上述问题,本文利用硅烷偶联剂(KH570)修饰Li_(6.4)La_(3)Zr_(2)Al_(0.2)O_(12)(KH@LLZO),通过原位聚合得到三维分级结构复合固态电解质.电解质中填料(KH@LLZO)含量高(80 wt%)的一侧提供刚性的屏障来抑制锂枝晶的生长;填料含量低(8 wt%)的一侧具有最优的离子电导率,赋予电池体系高效的锂离子传输.得益于电解质独特的分级结构,采用该电解质组装得到的对称锂电池具有0.9 mA cm^(-2)的临界电流密度,并且在0.3 mA h cm^(-2)的面容量下稳定循环超过600 h.组装的Li|LiFePO_(4)电池也展现了长循环稳定性(0.5 C电流密度下循环200圈,容量保持率为91.6%).此外,组装得到的软包电池表现出优异的柔韧性和安全性.本研究提出的采用表面修饰填料(KH@LLZO)构筑得到的分级结构复合固态电解质,为开发无枝晶、高性能全固态锂金属电池开辟了一条新途径.

关键词：固态电解质临界电流密度聚合物固体电解质分级结构离子电导率锂电池界面相容性复合固体电解质

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Ultra-small platinum nanoparticles segregated by nickle sites for efficient ORR and HER processes

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Journal of Energy Chemistry 2022年第2期31卷 48-54页

作者： Lvhan Liang Huihui jin Huang Zhou Bingshuai Liu Chenxi Hu Ding Chen Jiawei Zhu Zhe Wang Hai-Wen Li Suli Liu Daping He Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryXianhu Hydrogen ValleyFoshan 528200GuangdongChina Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070HubeiChina Platform of Inter/Transdisciplinary Energy Research International Research Center for Hydrogen EnergyInternational Institute for Carbon-Neutral Energy ResearchYushu UniversityFukuoka 819-0395Japan Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171JiangsuChina

In the electrochemical process,Pt nanoparticles(NPs)in Pt-based catalysts usually agglomerate due to Oswald ripening or lack of restraint,ultimately resulting in reduction of the active sites and catalytic *** to uniformly disperse and firmly fix Pt NPs on carbon matrix with suitable particle size for catalysis is still a big ***,to prevent the agglomeration and shedding of Pt NPs,Ni species is introduced and are evenly dispersed in the surface of carbon matrix in the form of Ni-N-C active sites(Ni ZIF-NC).The Ni sites can be used to anchor Pt NPs,and then effectively limit the further growth and agglomeration of Pt NPs during the reaction *** with commercial Pt/C catalyst,Pt@Ni ZIF-NC,with ultralow Pt loading(7 wt%)and ideal particle size(2.3 nm),not only increases the active center,but also promotes the catalysis kinetics,greatly improving the ORR and HER catalytic *** acidic conditions,its half-wave potential(0.902 V)is superior to commercial Pt/C(0.861 V),and the mass activity(0.38 A per mg Pt)at 0.9 V is 4.7 times that of Pt/C(0.08 A per mg Pt).Besides,it also shows outstanding HER *** 20 and 30 mV,its mass activity is even 2 and 6 times that of Pt/C,*** it is under ORR or HER conditions,it still shows excellent *** undoubtedly indicate the realization of dual-functional catalysts with low-Pt and high-efficiency properties.

关键词： Oxygen reduction reaction Hydrogen evolution reaction Zeolitic imidazolate frameworks Nickle site Pt nanoparticles

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Achieving High-Strength Porous Tungsten with Wide Porosity Range Via Selective Dissolution W-Ti-Fe Precursor

SSRN

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SSRN 2024年

作者： Jia, Hao Zhang, Jian Ge, Shuai Zhu, Bing Liu, Ruxia Wu, Dongshuang Luo, Guoqiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore

Porous tungsten with wide porosity variation is considered a candidate for high-energy X-ray flash radiography. This work combines tape casting and dealloying to selectively dissolve a W-Ti-Fe precursor, achieving high-strength porous tungsten with a wide porosity range. The PVB exists on the surface of particles in the form of an amorphous carbon film after pyrolysis, providing conditions for the W-Fe-C interface reaction. The porosity of porous tungsten is 50.7~80.4%. The compressive strengths of porous tungsten with porosity of 50.7% and 80.4% are 221.9 MPa and 10.6 MPa, respectively. The dissolution of the Ti located in the ligament can enhance the porosity of porous tungsten. The coating composed of the solid solution formed at the interface of W and Ti during heat treatment and Fe3W3C can enhance the ligament strength. This work provides a theoretical reference for preparing porous tungsten with a wide porosity range and high performance. © 2024, The Authors. All rights reserved.

关键词： Dissolution

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Vacancy-Based Defect Regulation for High Thermoelectric Performance in Ge9Sb2Te12-x Compounds

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ACS APPLIED materials & INTERFACES 2020年第17期12卷 19664-19673页

作者： Chen, Shuo Bai, Hui Li, Junjie Pan, Wenfeng Jiang, Xianyan Li, Zhi Chen, Zhiquan Yan, Yonggao Su, Xianli Wu, Jinsong Uher, Ctirad Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Physics University of Michigan Ann Arbor Michigan 48109 United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Defect engineering is the core strategy for improving thermoelectric properties. Herein, cation doping along with modulation of cation vacancy has been developed in GeTe-based materials as an effective method to induce vacancy-based defects to boost their thermoelectric performance. A series of ternary compounds of Ge9Sb2Te12-x (x = 0, 0.03, 0.06, 0.09, 0.12, 0.15) was prepared by vacuum-melting and annealing combined with the spark plasma sintering (SPS) process. The role of Sb doping and cation vacancy on thermoelectric properties was systematically investigated. It is found that alloying Sb2Te3 into GeTe increases the concentration of cation vacancies, which is corroborated by both positron annihilation measurements and theoretical calculations. The vacancies, stacking faults, and planar defect interactions determine the thermoelectric transport properties. Adjusting the deficiency of Te effectively tunes the concentration of cation vacancies and dopant defects in the structure. In turn, this tunes the carrier concentration close to its optimum. A high power factor of 32.6 mu W cm(-1) K-2 is realized for Ge9Sb2Te11.91 at 725 K. Moreover, large strains induced by the defect structures, including Sb dopant, vacancy, staking faults, as well as planar defects intensify phonon scattering, leading to a significant decrease in the thermal conductivity from 7.6 W m(-1) K-1 for pristine GeTe to Ge9Sb2Te11.85 at room temperature. All of the above contribute to a high ZT value of 2.1 achieved for the Ge9Sb2Te11.91 sample at 775 K.

关键词： GeTe-based compounds alloying with Sb2Te3 deficiency of Te stacking fault vacancy plane thermoelectric

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Multi-functional layered double hydroxides supported by nanoporous gold toward overall hydrazine splitting

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 61-69页

作者： Yongji Qin Huijie Cao Qian Liu Shaoqing Yang Xincai Feng Hao Wang Meiling Lian Dongxing Zhang Hua Wang Jun Luo Xijun Liu ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Institute for Advanced Study Chengdu UniversityChengdu 610106China China National Coal Group Corporation Beijing 100120China Tianjin Engineering Research Center of Civil Aviation Energy Environment and Green Development School of Transportation Science and EngineeringCivil Aviation University of ChinaTianjin 300300China

Layered double hydroxides have demonstrated great potential for the oxygen evolution reaction,which is a crucial half-reaction of overall water ***,it remains challenging to apply layered double hydroxides in other electrochemical reactions with high efficiency and ***,we report two-dimensional multifunctional layered double hydroxides derived from metalorganic framework sheet precursors supported by nanoporous gold with high porosity,which exhibit appealing performances toward oxygen/hydrogen evolution reactions,hydrazine oxidation reaction,and overall hydrazine *** as-prepared catalyst only requires an overpotential of 233 mV to reach 10 mA·cm^(-2) toward oxygen evolution *** overall hydrazine splitting cell only needs a cell voltage of 0.984 V to deliver 10 mA·cm^(-2),which is far more superior than that of the overall water splitting system(1.849 V).The appealing performances of the catalyst can be contributed to the synergistic effect between the metal components of the layered double hydroxides and the supporting effect of the nanoporous gold substrate,which could endow the sample with high surface area and excellent conductivity,resulting in superior activity and stability.

关键词： layered double hydroxide oxygen evolution reaction hydrazine oxidation reaction overall hydrazine splitting hydrogen production

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Structure and Tribological Evolution of Ta-N Layer by Controlling the Time of Microwave Plasma Nitriding

SSRN

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SSRN 2024年

作者： Li, Jiacheng Xu, Zhigang Peng, Jian Shen, Qiang Wang, Chuanbin State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Chaozhou521000 China

The Ta-N layer on the Ta matrix surface was synthesized using microwave plasma nitriding (MPN) to enhance its wear resistance. The effects of holding time on the phase composition, morphology, mechanical properties, friction, and wear of the nitriding layers were systematically examined. The results revealed that nanocrystalline Ta-N layers with a dense surface and low roughness were successfully fabricated. The thickness of the Ta-N layer increased from 0.87 μm to 4.23 μm with prolonged holding time. The hardness of the Ta-N layer increased first and then decreased with the extension of holding time, and reached the maximum at 4h. Friction and wear test results indicated that the Ta-N layer exhibited superior wear resistance at the holding time of 4 h, which was mainly attributed to the synergy of dense structure and the generation of the nanocrystal. In conclusion, the Ta-N layer with the desired hardness and wear resistance was obtained due to MPN treatment, which offered excellent surface protection for the Ta matrix in terms of wear resistance. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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