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A new tin-based O3-Na_(0.9)[Ni_(0.45-x/2)Mn_xSn_(0.55-x/2)]O_2 as sodium-ion battery cathode

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Journal of Energy Chemistry 2019年第4期28卷 132-137页

作者： Xiaohui Rong Xingguo Qi Yaxiang Lu Yuesheng Wang Yunming Li Liwei Jiang Kai Yang Fei Gao Xuejie Huang Liquan Chen Yong-Sheng Hu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences

Recently,sodium-ion batteries(SIBs),regarded as promising supplements for lithium-ion batteries(LIBs),especially in the large-scale energy storage field,are attracting more and more ***,the limited suitable cathode materials hinder the wide commercialization of *** this aspect,in this work,a new layered oxide with 4d metal tin was synthesized and investigated as cathode material for *** optimized sodium-deficient O3-Na_(0.9)Ni_(0.45)Sn_(0.55)O_2and O3-Na_(0.9)Ni_(0.4)Mn_(0.1)Sn_(0.5)O_2were selected for comprehensive investigation,both of which exhibited high operating voltage of around 3.45 V with smooth charge/discharge *** comparison,O3-Na_(0.9)Ni_(0.4)Mn_(0.1)Sn_(0.5)O_2shows a higher reversible capacity(65 m A h/g,0.1 C),better rate capability and cycling stability than that of O3-Na_(0.9)Ni_(0.45)Sn_(0.55)O_2(50 mA h/g,0.1 C),indicating that a small amount of Mn-substitution can improve the electrochemical *** work presents a new possibility of discovering potential cathode candidates by exploring the tin-based layered oxides.

关键词： Sodium-ion batteries Layered oxide cathode tin-based cathode

Interface microstructure and properties of submerged arc brazing tin-based babbit

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China Welding 2019年第2期28卷 45-49页

作者： Zhou Fangming Li Jing Xu Donghao Shi Mingxiao Jiangsu Province Key Laboratory of Advanced Welding Technology Jiangsu University of Science and TechnologyZhenjiang 212003China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The submerged arc brazing method was used to connect the tin-based babbit alloy with the steel *** microstructure of the submerged arc brazed Babbitt interface layer on the surface of Q235 B steel was analyzed by OM,SEM and EDS and the hardness properties of the joint interface layer were tested by MH-5 microhardness *** result of research shows that a layer of canine-shaped intermetallic compound with uneven thickness is formed at the interface,and the thickness is 10-20 μ*** interface layer includes two kinds of compound layers,namely the Fe Sn layer near the side of the steel substrate and FeSn layer near the side of the *** the interfacial reaction process,Fe atoms in the steel matrix dissolve into the liquid babbit alloy and form a certain concentration gradient at the *** farther from the interface,the lower the Fe atom *** growth of Gibbs free energy of Fe Sn is lower when the temperature is above 780.15 K,and the temperature during the welding process is much higher than 780.15 K,moreover the precipitation temperature of Fe Sn is ***,in the subsequent cooling process,Fe Sn is first precipitated from the interface near the side of steel matrix and then FeSn is precipitated from the interface near the side of babbit *** test showed that the intermetallic compound at the interface layer significantly improved the hardness properties.

关键词： tin-based babbitt alloy submerged arc brazing interfacial structure intermetallic compound hardness

Triple effects of Sn-substitution on Na0.67Ni0.33Mn0.67O2

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Journal of Materials Science & Technology 2019年第7期35卷 1250-1254页

作者： Xiaohui Rong Fei Gao Feixiang Ding Yaxiang Lu Kai Yang Hong Li Xuejie Huang Liquan Chen Yong-Sheng Hu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research InstituteBeijing 100192China Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China

Layered oxides are one of the most prom ising cathode materials for sodium ion batteries (NIBs), however, the relatively low working voltage hinders the increase of energy density thus limiting the application scenarios of NIBs. Here we prepared and investigated a series of Sn^4+ substituted NaO.67NiO.33M na67-xSnxO2 (x = 0.10, 0.20, 0.30, 0.33) and found that Sn-substitution can induce three effects: promoting O3-stack formation, sm oothing the voltage profile and increasing the working voltage to -3.6 V. This study would enrich the knowledge of Sn-substitution and give guide to the better design of high-voltage cathode materials for NIBs.

关键词： Sodium-ion batteries Layered oxide cathode tin-based Cathode

Electrodeposited Sn-based Catalysts for CO2 Electroreduction

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Chinese Journal of Structural Chemistry 2020年第2期39卷 206-213,183页

作者： YE Ke WANG Guo-Xiong BAO Xin-He State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

Electrochemical CO2 reduction reaction(CO2RR) has been considered as a feasible avenue for simultaneous conversion of renewable energy and CO2. Economic and technical analysis suggests that the production of valuable C1 chemicals such as formic acid and CO is the most economically practicable route for CO2RR. This perspective summarizes the performance of electrodeposited Sn-based catalysts for C1 chemicals production and the relative mechanism of CO2RR. Further fundamental understanding and industrial applications of electrodeposited Sn-based catalysts in CO2 electrolyzer device are also discussed.

关键词： tin-based catalysts electrodeposition technology alloy interface electrochemical carbon dioxide reduction reaction

Environment friendly halide perovskites for the highest efficient solar energy conversion

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Environment friendly halide perovskites for the highest effi...