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Long‐life lithium batteries enabled by a pseudo‐oversaturated electrolyte

Carbon Energy 2024年第4期6卷 115-127页

作者： Youchun Yu Simeng Wang Juyan Zhang Weiwei Qian Nana Zhang guangjie shao Haiyan Bian Yuwen Liu Lan Zhang Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdaoChina Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijingChina Haike Group Research Institute of Innovation&Technology DongyingChina Langfang Green Industrial Technology Center LangfangChina

The specific energy of Li metal batteries(LMBs)can be improved by using high‐voltage cathode materials;however,achieving long‐term stable cycling performance in the corresponding system is particularly challenging for the liquid ***,a novel pseudo‐oversaturated electrolyte(POSE)is prepared by introducing 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether(TTE)to adjust the coordination structure between diglyme(G2)and lithium bis(trifluoromethanesulfonyl)imide(LiTFSI).Surprisingly,although TTE shows little solubility to LiTFSI,the molar ratio between LiTFSI and G2 in the POSE can be increased to 1:1,which is much higher than that of the saturation state,1:*** and experimental results prove that TTE promotes closer contact of the G2 molecular with Li^(+)in the ***,it also participates in the formation of electrolyte/electrode *** electrolyte shows outstanding compatibility with both the Li metal anode and typical high‐voltage ***||Li symmetric cells show a long life of more than 2000 h at 1 mA cm^(−2),1 mAh cm^(−2).In the meantime,Li||LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cell with the POSE shows a high reversible capacity of 134.8 mAh g^(−1 )after 900 cycles at 4.5 V,1 C *** concept of POSE can provide new insight into the Li^(+)solvation structure and in the design of advanced electrolytes for LMBs.

关键词： high voltage lithium metal batteries pseudo‐oversaturated electrolyte solid electrolyte interphases(SEI) solvation structure

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Metal phosphides and borides as the catalytic host of sulfur cathode for lithium–sulfur batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 990-1002页

作者： Rui Gao Zhenyu Wang Sheng Liu guangjie shao Xueping Gao College of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Nankai UniversityTianjin 300350China

Lithium−sulfur batteries are one of the most competitive high-energy batteries due to their high theoretical energy density of _(2)600 W·h·kg^(−1).However,their commercialization is limited by poor cycle stability mainly due to the low intrinsic electrical conductivity of sulfur and its discharged products(Li_(2)S_(2)/Li_(2)S),the sluggish reaction kinetics of sulfur cathode,and the“shuttle effect”of soluble intermediate lithi-um polysulfides in ether-based *** address these challenges,catalytic hosts have recently been introduced in sulfur cathodes to en-hance the conversion of soluble polysulfides to the final solid products and thus prevent the dissolution and loss of active-sulfur *** this review,we summarize the recent progress on the use of metal phosphides and borides of different dimensions as the catalytic host of sulfur cathodes and demonstrate the catalytic conversion mechanism of sulfur cathodes with the help of metal phosphides and borides for high-en-ergy and long-life lithium-sulfur ***,future outlooks are proposed on developing advanced catalytic host materials to improve battery performance.

关键词： lithium–sulfur batteries sulfur cathode catalytic host metal phosphides metal borides

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Enhanced confinement synthesis of atomically dispersed Fe-N-C catalyst from resin polymer for oxygen reduction

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Journal of Energy Chemistry 2022年第2期31卷 630-636页

作者： Ailing Song Hao Tian Wang Yang Wu Yang Yuhan Xie Hao Liu Guoxiu Wang guangjie shao State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource ReuseCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyBroadwaySydneyNSW 2007Australia Joint International Laboratory on Environmental and Energy Frontier Materials School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China

Due to larger atom utilization,unique electronic properties and unsaturated coordination,atomically dispersed non-precious metal catalysts with outstanding performances have received great attention in *** the challenge of serious aggregation,rational synthesis of an atomic catalyst with good dispersion of atoms is paramount to the development of these ***,we report an enhanced confinement strategy to synthesize a catalyst comprised of atomically dispersed Fe supported on porous nitrogen-doped graphitic carbon from the novel and more cross-linkable Melamine-Glyoxal *** isolated grid trapping,excessive melamine restricting,and nitrogen anchoring are strongly combined to ensure the final atomic-level dispersion of metal *** studies revealed enhanced kinetics of the obtained catalyst towards oxygen reduction reaction(ORR).This catalytic activity originates from the highly active surface with atomically dispersed iron sites as well as the multi-level three-dimensional structure with fast mass and electron *** enhanced confinement strategy endows the resin-derived atomic catalyst with a great prospect to develop for commercialization in future.

关键词： Non-precious metal catalysts Atomic catalyst Oxygen reduction reaction Confinement synthesis

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Supercapacitor characteristic of La-doped Ni(OH)_2 prepared by electrodeposition

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Rare Metals 2009年第2期28卷 132-136页

作者： shao guangjie Yao Yue Zhang Shipin He Pei Yanshan Univ Coll Environm & Chem Engn State Key Lab Metastable Mat Sci & Technol Qinhuangdao 066004 Peoples R China

Samples of lanthanum-doped nickel hydroxide were prepared by electrodeposition method. The structure and electrochemical properties of the samples were studied by X-ray diffraction and a home-made open three-electrode cell system,respectively. The results show that the deposition process of Ni(OH)2 and La(OH)3 is mainly controlled by electrochemical polarization,which makes it easy to form uniform fine crystals. In addition,La(OH)3 is not a separate phase and lanthanum ions are doped into Ni(OH)2 crystal la...

关键词： nickel hydroxide lanthanum doping supercapacitor electrodeposition

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Influence of RE elements on the performances of Ni-P coelectrodeposi-tion bath

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Rare Metals 2005年第4期24卷 341-344页

作者： shao guangjie CHEN Ling QIN Xiujuan DONG Haifeng College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China

Through adding the chlorides of La and Ce into Ni-P coelectrodeposition bath, the effects of rare earth （RE） elements on the performances of the bath have been investigated by hull cell tests, far and near cathodes tests, and so on. It is shown that the optimum contents of CeCl3, LaCl3 and their mixture are all 2 g/L. The bright zones of the Ni-P coelectrodeposition bath are greatly widened by the addition of RE, and this effect is more obvious in the low current density range. By the addition of RE, the current efficiency of the Ni-P coelectrodeposition bath is greatly increased. The results also show that RE elements can improve the dispersing capacity of the bath. It can be theoretically deduced that RE ions improve the cathodic polarization degree of Ni-P codeposition. This deduction has been confirmed by the cathodic polarization curves measured in the baths.

关键词： electrodeposition Ni-P alloys coelectrodeposition bath rare earth

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Microstructure and mechanical properties of hypereutectic Al-Si alloy modified with Cu-P

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Rare Metals 2008年第1期27卷 59-63页

作者： ZHANG Henghua DUAN Haili shao guangjie XU Luoping School of Materials Science and Engineering Shanghai University Shanghai 200072 China

The microstructure and mechanical properties of Al-14.6Si castings modified by Cu-P master alloy under different conditions were studied with optical microscope（OM） and mechanical testing and simulation（MTS）.The results indicate that the Cu-P master alloy possesses not only obvious modification effect,but also longevity effect with more than 8 h on the hypereutectic Al-Si *** is shown from thermal calculation,scanning electron microscope（SEM）,and energy dispersive analysis of X-rays（EDAX） that the modification mechanism of Cu-P on primary silicon in the castings is heterogeneous nucleation around AlP *** Cu-P master alloy has no or little modifying effect on eutectic silicon,even though it has obvious modification on primary silicon in the *** may be because of the fast transformation of eutectic silicon at a very narrow temperature,which will notably weaken the role of AlP particles as heterogeneous nuclei for eutectic silicon.

关键词： hypereutectic Al-Si alloy microstructure mechanical properties Cu-P master alloy modification

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Nitrogen-doped carbon black supported Pd nanoparticles as an effective catalyst for formic acid electro-oxidation reaction

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Frontiers in Energy 2017年第3期11卷 310-317页

作者： Na SUN Minglei WANG Jinfa CHANG Junjie GE Wei XING guangjie shao State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Laboratory of Advanced Power Sources Changchun 130022 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

Pd nanoparticles supported on nitrogen doped carbon black （Vulcan XC-72R） with two different levels of doping were prepared by the microwave-assisted ethylene glycol reduction process and used as catalyst for the formic acid electro-oxidation （FAEO）. The results indicate that the different nitrogen doping contents in Pd/N-C catalysts have a significant effect on the performance of FAEO. A higher N content facilitates the uniform dispersion of Pd nanoparticles on carbon black with narrow particle size distribution. Furthermore, the electrochemical results show that the catalyst with a higher N-doping content possesses a higher catalytic activity and a long-term stability for FAEO. The peak current density of the Pd/N-C （high） catalyst is 1.27 and 2.31 times that of the Pd/N-C （low） and homemade Pd/C-H catalyst. The present paper may provide a simple method for preparation of high-performance anode catalyst for direct formic acid fuel cells （DFAFCs）.

关键词： formic acid electro-oxidation nitrogen doped oxidized carbon nitrogen content

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Preparation of nanometer perovskite-type oxide La_(0.8)Sr_(0.2)MnO_3 by organic solvent sol-gel method and capability testing

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Rare Metals 2008年第2期27卷 131-133页

作者： HU Jie shao guangjie HUANG Hao XING Guangzhong State Key Laboratory of Metastable Materials Science ＆ Technology Yanshan University Qinhuangdao 066004 China Department of Environment and Chemistry Yanshan University Qinhuangdao 066004 China

A perovskite-type oxide, La0.8Sr0.2MnO3, was synthesized by the organic solvent sol-gel method. The desired metal cations were chelated in a solution by using citric acid as the chelating agent and absolute ethanol as the solvent. The thermal decomposition of the metal carboxylate precursor gels was studied by thermogravimetric/differential thermal analyzer （TG/DTA） and the products derived from calcining the gels were characterized by X-ray diffraction （XRD） and transmission electronic microscope （TEM）. The polarization curves were acquired on an electrochemical workstation （LK98） and the discharge curves were acquired on a testing instrument of batteries （DC-5）, with a constant current discharge, less than 120 mA/cm^2. The results revealed that the nanometer perovskite-type powder with lesser particle size could be achieved with an organic solvent and had a better catalytic activity.

关键词： nanometer-materials perovskite organic solvent catalytic activity

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Modification mechanism of cerium on the Al-18Si alloy

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Rare Metals 2006年第1期25卷 11-15页

作者： ZHANG Henghua DUAN Haili shao guangjie XU Luoping YIN Junlin YAN Biao School of Materials Science and Engineering Shanghai University Shanghai 200072 China School of Materials Science and Engineering Tongji University Shanghai 200092 China

The effect of the rare earth cerium （Ce） on the hypereutectic Al-Si alloy under different casting states have been studied by optical microscope and quantitative image analysis. It is found that the size and the quantity of primary silicon in castings decrease with the increase of added Ce in the melt. Meanwhile primary silicon changes from branched shape to fine facetted shape. Although the modification on eutectic silicon in castings also improves with the increase of added Ce in the melt, the effect of modification on eutectic silicon away from primary silicon is more obvious than that on eutectic silicon close to primary silicon. The modification mechanism was analyzed in detail by means of scanning electron microscope equipped with energy dispersive analysis of X-ray and thermodynamics analysis, which included the analysis on the change in standard Gibbs energy of reaction and reaction equilibrium.

关键词： metal material modification mechanism thermodynamics analysis rare earth element hypereutectic Al-Si alloy

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Development on transparent conductive ZnO thin films doped with various impurity elements

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Rare Metals 2011年第2期30卷 175-182页

作者： ZHAO Lin shao guangjie SONG Shitao QIN Xiujuan HAN Sihuizhi School of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China Hebei Normal University of Science and Technology Qinhuangdao 066004 China

A general review of recent research progress in fabricating transparent conductive ZnO thin films by means of intentional doping and codoping with In, Ga, A1, Mg, Li, F, H, N, and P, divided into metals and nonmetals, is presented in this article. The main emphasis is placed on introducing and discussing the recent research achievements on the mechanisms of the incorporation of these impurities, and their effects on the electrical and optical properties. Lastly, this article concludes with a summary of the present state of investigations on doping elements in fabricating functional ZnO thin films for photoelectric applications, and with our personal view of the perspective of future studies on doped ZnO thin films.

关键词： thin films conductive films zinc oxide doping electric properties optical properties

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