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Lithium-site substituted argyrodite-type Li_(6)PS_(5)I solid electrolytes with enhanced ionic conduction for all-solid-state batteries

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science China(Technological sciences) 2023年第7期66卷 2059-2068页

作者： GAO Ling XIE YuLin TONG Yan XU Miao YOU JiaLe WEI HuiPing YU XiangXiang XU SiQi ZHANG Yi CHE Yong TANG Ya SUZUKI Kota KANNO Ryoji ZHAO GuoWei College of Chemistry and Chemical Engineering Huanggang Normal UniversityHuanggang 438000China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Shanghai Enpower Technology Co. Ltd.Shanghai 201802China Beijing Enpower Technology Co. Ltd.Beijing 102628China Department of Chemistry School of ScienceShanghai UniversityShanghai 200444China Research Center for All-Solid-State Battery Institute of Innovation ResearchTokyo Institute of TechnologyYokohama 226-8502Japan

Argyrodites,Li_(6)PS_(5)X(X=Cl,Br,I),have piqued the interest of researchers by offering promising lithium ionic conductivity for their application in all-solid-state batteries(ASSBs).However,other than Li_(6)PS_(5)Cl(651Cl)and Li_(6)PS_(5)Br(651Br),Li_(6)PS_(5)I(651I)shows poor ionic conductivity(10^(-7)S cm^(-1)at 298 K).Herein,we present Al-doped 651I with I^(-)/S^(2-)site disordering to lower activation energy(Ea)and improve ionic *** formed argyrodite-type solid solutions with a composition of(Li_(6–3x)Al_(x))PS_(5)I in 0≤x≤0.10,and structural analysis revealed that Al^(3+)is located at Li ***,the Al-doped samples contained anion I^(-)/S^(2-)site disorders in the crystal structures and smaller lattice parameters than the non-doped *** spectroscopy measurements indicated that Al-doping reduced the ionic diffusion barrier,Ea,and increased the ionic conductivity to 10^(-5)S cm^(-1);the(Li5.7Al0.1)PS5I had the highest ionic conductivity in the studied system,at 2.6×10^(-5)S cm^(-1).In a lab-scale ASSB,with(Li_(5.7)Al_(0.1))PS_(5)I functioned as a solid electrolyte,demonstrating the characteristics of a pure ionic conductor with negligible electronic *** evaluated ionic conduction is due to decreased Li+content and I^(-)/S^(2-)disorder ***-site cation doping enables an in-depth understanding of the structure and provides an additional approach to designing betterperforming SEs in the argyrodite system.

关键词： argyrodite Li6PS5I solid electrolytes ionic conductor ionic conductivity

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Strategic Bidding for Wind-PV-Storage power Station Clusters Participating in Day-ahead Energy Market Based on Conditional Value at Risk Under Dual Settlement Mode 11

Strategic Bidding for Wind-PV-Storage Power Station Clusters...

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11th China International Conference on Electricity Distribution, CICED 2024

作者： Du, Peng Sun, Haonan Liu, Nian Jia, Na Zhu, Xiaoyi North China Electric Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing China Science and Technology Research Institute China Three Gorges Corporation Beijing China

ISBN: (纸本)9798350368345

Nowadays, it is inevitable for renewable energy power stations to participate in market-oriented competition. In this paper, a strategic bidding model based on conditional value at risk (CVaR) and dual settlement mode (DSM) for wind-photovoltaic-energy storage power station clusters (WSSC) participating in the day-ahead energy market is expounded. To begin with, a new reporting method that adding the power of ESS to the bidding quantity of renewable energy is proposed. Then, considering CVaR and DSM simultaneously, a scenario-based strategic bidding model is put forward. In the end, case studies indicate the significance of energy storage system (ESS) in arbitrage, minimizing deviation assessment punishment and power curtailment punishment. Besides, decision maker can choose suitable risk weight factor according to their own degree of risk preference to make a perfect balance between profit and risk. Apart from that, numerical results also validate that bidding as a whole for WSSC owns more advantages than bidding independently over bid-winning quantity, profit and CVaR. © 2024 IEEE.

关键词： Windmill

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Intrinsic spin shielding effect in platinum-rare-earth alloy boosts oxygen reduction activity

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National science Review 2023年第9期10卷 136-145页

作者： Siyuan Zhu Mingzi Sun Bingbao Mei Liting Yang Yuyi Chu Zhaoping Shi Jingsen Bai Xian Wang Zheng Jiang Changpeng Liu Bolong Huang Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Shanghai Synchrotron Radiation Facility Zhangjiang National LaboratoryShanghai Advanced Research InstituteChinese Academy of Sciences Dalian National Laboratory for Clean Energy Chinese Academy of Sciences

Oxygen reduction reactions（ORRs） involve a multistep proton-coupled electron process accompanied by the conversion of the apodictic spin *** the role of spin configurations of metals in the adsorption and desorption of oxygen intermediates during ORRs is critical for the design of efficient ORR ***,a platinum-rare-earth-metal-based alloy catalyst,Pt2Gd,is introduced to reveal the role of spin configurations in the catalytic activity of *** catalyst exhibits a unique intrinsic spin reconfiguration because of interactions between the Gd-4f and Pt-5d *** adsorption and desorption of the oxygen species are optimized by modifying the spin symmetry and electronic structures of the material for increased ORR *** Pt2Gd alloy exhibits a half-wave potential of 0.95 V and a superior mass activity of 1.5 A·mgPt-1in a 0.1 M HClO4electrolyte,as well as higher durability than conventional Pt/C *** calculations have proven that the spin shielding effect of Gd pairs increases the spin symmetry of Pt-5d orbitals and adsorption preferences toward spin-polarized intermediates to facilitate *** work clarifies the impact of modulating the intrinsic spin state of Pt through the interaction with the local high spin 4f orbital electrons in rare-earth metals,with the aim of boosting the spin-related oxygen reduction reaction,thus fundamentally contributing to the understanding of new descriptors that control ORR activity.

关键词： oxygen reduction reaction intermetallic compound spin effect rare-earth metal electrocatalysis

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Assessment Method of Offshore Wind Resource Based on Multi-dimenssiional Indexes System

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CSEE Journal of power and Energy Systems 2024年第1期10卷 76-87页

作者： Xiaomei Ma Yongqian Liu Jie Yan Shuang Han Li Li Hang Meng Muhammet Deveci Konstanze Kolle Umit Cali the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China School of Physical and Electronic Information Engineering Qinghai Normal UniversityXiningQinghai 810016China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China the Royal School of Mines Imperial College London.London SW72AZUKand also with Department of Industrial EngineeringTurkish Naval AcademyNational Defence University34940IstanbulTurkey Department of Energy Systems SINTEF Energy ResearchTrondheimNO-7034 Norway Department of Electric Power Engineering Norwegian University of Science and TechnologyTrondheimNO-7491 Norway

Traditional assessment indexes could not fully describe offshore wind resources,for the meteorological properties of offshore are more complex than *** a result,the uncertainty of offshore wind power projects would be increased and final economic benefits would be ***,a study on offshore wind resource assessment is carried out,including three processes of“studying data sources,conducting multidimensional indexes system and proposing an offshore wind resource assessment method based on analytic hierarchy process(AHP).First,measured wind data and two kinds of reanalysis data are used to analyze the characteristics and reliability of data ***,indexes such as effective wind speed occurrence,affluent level occurrence,coefficient of variation,neutral state occurrence have been proposed to depict availability,richness,and stability of offshore wind resources,*** with existing parameters(wind power density,dominant wind direction occurrence,water depth,distance to coast),a multidimensional indexes system has been built and on this basis,an offshore wind energy potential assessment method has been ***,the proposed method is verified by the annual energy production of five offshore wind turbines and practical operating data of four offshore wind farms in *** study also compares the ranking results of the AHP model to two multi-criteria decision making(MCDM)models including weighted aggregated sum product assessment(WASPAS)and multi-attribute ideal real comparative analysis(MAIRCA).Results show the proposed method gains well in practical engineering applications,where the economic score values have been considered based on the offshore reasonable utilization hours of the whole life cycle in China.

关键词： Annual energyproduction aatmospheric stability data sources offshore wind resource wind power density

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Investigation on E-Band Hybrid-Serpentine slow-wave circuit 24

Investigation on E-Band Hybrid-Serpentine slow-wave circuit

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24th International Vacuum Electronics Conference, IVEC 2023

作者： Li, Fei Xiao, Liu Zhao, Jiandong Wang, Zicheng Yi, Hongxia Shang, Xinwen Sun, Yuhui Aerospace Information Research Institute Key Laboratory of Science and Technology on High Power Microwave Sources and Technologies Chinese Academy of Sciences Beijing100190 China

ISBN: (纸本)9781665473217

A new E-band hybrid-serpentine slow-wave circuit is investigated by theoretical analysis and numerical simulation. The results show that the hybrid-serpentine slow-wave circuit achieves higher coupling impedance than basic serpentine circuit with greater design flexibility. By allowing the vertical distances between the upper and lower centers of bend curvature for both the inner and outer bends to be different, this hybrid-serpentine circuit gains an additional degree of freedom that can be used to widen or narrow the stopband and to tailor the dispersion near the 2π point to avoid backward wave oscillations (BWO). These results predicted that the E-band traveling wave tube(TWT) with hybrid-serpentine slow-wave circuit will achieve a better performance, including high-electron efficiency, high gain and good stability. © 2023 IEEE.

关键词： Efficiency

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Design of a Ku band 400W radiation-cooled Space TWT 24

Design of a Ku band 400W radiation-cooled Space TWT

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24th International Vacuum Electronics Conference, IVEC 2023

作者： Yi, Hongxia Li, Fei Shang, Xinwen Zhao, Jiandong Wang, Zicheng Xiao, Liu Aerospace Information Research Institute Chinese Academy of Sciences Key Laboratory of Science and Technology on High Power Microwave Sources and Technologies Beijing100190 China

ISBN: (纸本)9781665473217

In order to meet high-capacity and wide band requirement of communication satellite, a ku-band 400W TWT is designed in this paper. A dual-anode electronic gun, double taper helix slow wave structure, output section of SWS with Couplers, and 4-stage depressed collector are designed. The simulated results show that output power reaches more than 400W, with the electronic efficiency of 36.7%, and collector efficiency of 80.48% at 1 GHz bandwidth. © 2023 IEEE.

关键词： Slow wave structures

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Superior stable high-voltage LiCoO_(2) enabled by modification with a layer of lithiated polyvinylidene fluoride-derived LiF

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Carbon Energy 2024年第10期6卷 28-38页

作者： Qihang Ding Zewen Jiang Kean Chen Hui Li Jingzhe Shi Xinping Ai Dingguo Xia Hubei Key Lab of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhanChina Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials College of EngineeringPeking UniversityBeijingChina State Key Laboratory of New Textile Materials&Advanced Processing Technologies Wuhan Textile UniversityWuhanChina Wuhan Britain-China School WuhanChina

High-voltage LiCoO_(2) (LCO) can deliver a high capacity and therefore significantly boost the energy density of Li-ion batteries (LIBs). However, its cyclability is still a major problem in terms of commercial applications. Herein, we propose a simple but effective method to greatly improve the high-voltage cyclability of an LCO cathode by constructing a surface LiF modification layer via pyrolysis of the lithiated polyvinylidene fluoride (Li-PVDF) coating under air atmosphere. Benefitting from the good film-forming and strong adhesion ability of Li-PVDF, the thus-obtained LiF layer is uniform, dense, and conformal;therefore, it is capable of acting as a barrier layer to effectively protect the LCO surface from direct exposure to the electrolyte, thus suppressing the interfacial side reactions and surface structure deterioration. Consequently, the high-voltage stability of the LCO electrode is significantly enhanced. Under a high charge cutoff voltage of 4.6 V, the LiF-modified LCO (LiF@LCO) cathode demonstrates a high capacity of 201 mA h g^(−1) at 0.1 C and a stable cycling performance at 0.5 C with 80.5% capacity retention after 700 cycles, outperforming the vast majority of high-voltage LCO cathodes reported so far.

关键词： cycling stability high-voltage LiCoO_(2) LiF layer lithiated polyvinylidene fluoride surface modification

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Revealing the solid electrolyte interface on calcium metal anodes

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Journal of Energy Chemistry 2022年第7期31卷 174-190,I0005页

作者： Yumeng Zhao Aoxuan Wang Libin Ren Xingjiang Liu Jiayan Luo Key Laboratory for Green Chemical Technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin UniversityTianjin 300072China Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China National Key Laboratory of Science and Technology on Power Sources Tianjin Institute of Power SourcesTianjin 300384China

Owing to its low potential, crustal abundances and environmental friendliness, calcium metal anode(CMA) is emerging as a powerful contender in post-lithium era. However, the passivation of CMA fatally hinders its development. Recently, several feasible electrolytes have been developed. Nevertheless, as a pivotal part, the solid electrolyte interface(SEI) formed on CMA has not been paid enough attention to. In this review, based on the passivation mechanism of CMA, the favorable composition of SEI is emphasized with the corresponding electrolytes. It is considered that boron-containing and organic–inorganic hybrid SEI might be preferred. By comparing electrolytes and SEI on CMA with lithium and magnesium metal anodes, the root causes of CMA passivation are further elaborated, enlightening rational design rules of suitable SEI. Furthermore, some noteworthy details when assembling secondary calcium metal batteries(CMBs) are put forward. It is expected that deeper understanding of SEI on CMA will promote the development of CMBs.

关键词： Solid electrolyte interface Calcium metal anode Reversible deposition Passivation mechanism

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Increasing ionic conductivity in Li_(0.33)La_(0.56)TiO_(3)thin-films via optimization of processing atmosphere and temperature

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Rare Metals 2022年第1期41卷 179-188页

作者： Shi-Pai Song Cheng Yang Chun-Zhi Jiang Yong-Min Wu Rui Guo He Sun Jing-Lei Yang Yong Xiang Xiao-Kun Zhang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Department of Mechanical and Aerospace Engineering Hong Kong University of Science and TechnologyHong Kong 999077China Advanced Energy Research Institute University of Electronic Science and Technology of ChinaChengdu 611731China Sichuan Provincial Engineering Research Center of Flexible Display Material Genome University of Electronic Science and Technology of ChinaChengdu 611731China

As a promising solid electrolyte for thin-film lithium batteries,the amorphous Li_(0.33)La_(0.56)TiO_(3)(LLTO)thin film has gained great ***,enhancing ionic conductivity remains challenging in the ***,a systematical study was performed to improve the ionic conductivity of sputter-deposited LLTO thin films via the optimization of processing atmosphere and *** combining the optimized oxygen partial pressure(30%),annealing temperature(300℃),and annealing atmosphere(air),an amorphous LLTO thin film with an ionic conductivity of 5.32910^(-5)·S·cm^(-1) at room temperature and activation energy of 0.26 eV was *** results showed that,first,the oxygen partial pressure should be high enough to compensate for the oxygen loss,but low enough to avoid the abusive oxygen scattering effect on lithium precursors that results in a lithium-poor *** oxygen partial pressure needs to achieve a balance between lithium loss and oxygen defects to improve the ionic ***,a proper annealing temperature reduces the oxygen defects of LLTO thin films while maintaining its amorphous state,which improves the ionic ***,the highest ionic conductivity for the LLTO thin films that were annealed in air(a static space without a gas stream)occurs because of the decreased lithium loss and oxygen defects during *** findings show that the lithium-ion concentration and oxygen defects affect the ionic conductivity for amorphous LLTO thin films,which provides insight into the optimization of LLTO thin-film solid electrolytes,and generates new opportunities for their application in thinfilm lithium batteries.

关键词： Li_(0.33)La_(0.56)TiO_(3) Thin film Ionic conductivity Lithium-ion concentration Oxygen defects

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Anion Defects Engineering of Ternary Nb-Based Chalcogenide Anodes Toward High-Performance Sodium-Based Dual-Ion Batteries

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Nano-Micro Letters 2023年第7期15卷 218-232页

作者： Yangjie Liu Min Qiu Xiang Hu Jun Yuan Weilu Liao Liangmei Sheng Yuhua Chen Yongmin Wu Hongbing Zhan Zhenhai Wen College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108People’s Republic of China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Materials and Techniques Toward Hydrogen EnergyFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002People’s Republic of China Fujian Normal University Fuzhou 350108People’s Republic of China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power Sources2965 Dongchuan RoadShanghai 200245People’s Republic of China

Sodium-based dual-ion batteries(SDIBs) have gained tremendous attention due to their virtues of high operating voltage and low cost, yet it remains a tough challenge for the development of ideal anode material of SDIBs featuring with high kinetics and long durability. Herein, we report the design and fabrication of N-doped carbon film-modified niobium sulfur–selenium(NbSSe/NC) nanosheets architecture, which holds favorable merits for Na^(+) storage of enlarged interlayer space, improved electrical conductivity, as well as enhanced reaction reversibility, endowing it with high capacity, high-rate capability and high cycling stability. The combined electrochemical studies with density functional theory calculation reveal that the enriched defects in such nanosheets architecture can benefit for facilitating charge transfer and Na+ adsorption to speed the electrochemical kinetics. The NbSSe/NC composites are studied as the anode of a full SDIBs by pairing the expanded graphite as cathode, which shows an impressively cyclic durability with negligible capacity attenuation over 1000 cycles at 0.5 A g^(-1), as well as an outstanding energy density of 230.6 Wh kg^(-1) based on the total mass of anode and cathode.

关键词： NbSSe Sodium-based dual-ion battery Anode Nanosheets architecture Anion defects engineering

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