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Room-temperature extraction of individual elements from charged spent LiFePO_(4)batteries

Rare Metals 2022年第5期41卷 1595-1604页

作者： Mei-Cen Fan yun Zhao yu-Qiong kang John Wozny Zheng Liang Jun-Xiong Wang Guang-Min Zhou Bao-Hua Li Naser Tavajohi fei-yu kang Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School(SIGS)Shenzhen 518055China Department of Chemistry and Biochemistry Northern Illinois UniversityDekalb 60115USA School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Chemistry Umea UniversityUmeii 90187Sweden

Recycling millions of metric tons of spent LiFePO_(4) batteries would benefit human health while reducing resource depletion and environmental ***,recovering individual elements from the spent batteries without generating waste is ***,we present a distinctive approach for recycling spent LiFePO_(4) batteries at room temperature,where water is the only leaching agent ***_(4) and lithium intercalated graphite act as a precursor material for selectively extracting lithium,iron,and phosphorus through charging the LiFePO_(4) batteries to the delithiated *** solution extracted Fe from FePO_(4) within 30 min and regenerated without consumption,similar to a *** the optimal leaching conditions(1 mol·L^(-1) NaOH,0.5 h,NaOH/Fe molar ratio of 4.5),Fe and P leaching efficiencies achieved 89.1%and 99.2%,*** methodology reflected in this research reduced the material cost per kg cathode material to a fraction of previously published reports,only occupies 6.13%of previous *** addition,the method improved the battery recycling revenue calculated by the EverBatt model by 2.31 times and 1.94 times over pyrometallurgical and hydrometallurgical *** proposed method allows for the convenient recovery of the elemental components of spent LiFePO_(4) batteries.

关键词： Battery recycling Spent LiFePO_(4)batteries Charged batteries FePO_(4) Lithiated anode

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Lithium metal recycling from spent lithium-ion batteries by cathode overcharging process

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Rare Metals 2022年第6期41卷 1843-1850页

作者： Mei-Cen Fan John Wozny Jue Gong yu-Qiong kang Xian-Shu Wang Zhe-Xu Zhang Guang-Min Zhou yun Zhao Bao-Hua Li fei-yu kang Shenzhen Key Laboratoryon Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School(SIGS)Shenzhen518055.China Department of Chemistryand Biochemistry Northern Iinois UniversityDekalb 60115.USA School of Materials and Energy and Center for Applied Chemistry University of Electronic Science and Technology of ChinaChengdu 611731China Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

The burgeoning growth of lithium-ion batteries(LIBs)has caused great concern for the uninterrupted supply of *** spent LIBs are a richer source of lithium than the natural resources from ore,salt lake brine,or seawater,traditional methodology for recycling of lithium in spent LIBs suffers from costly energy consumption and the generation of unfriendly environmental pollutants.

关键词： lithium charging process

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Swelling behaviors of heterogeneous red-bed mudstone subjected to different vertical stresses

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1847-1863页

作者： kang Huang Zhangjun Dai Chengzeng Yan fei yu Wei Zhang Shanxiong Chen State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China Faculty of Engineering China University of GeosciencesWuhanChina International Joint Research Center for Deep Earth Drilling and Resource Development China University of GeosciencesWuhan430074China

In this study,the axial swelling strain of red-bed mudstone under different vertical stresses are measured by swell-under-load method,and the microstructure of mudstone after hygroscopic swelling is studied by mercury intrusion porosimetry(MIP).The weakening coefficient and Weibull distribution function are introduced into the coupling model of mudstone moisture diffusion-swelling deformation-fracture based on finite-discrete element method(FDEM).The weakening effect of moisture on mudstone's mechanical parameters,as well as the heterogeneity of swelling deformation and stress distribution,is *** microcrack behavior and energy evolution of mudstone during hygroscopic swelling deformation under different vertical stresses are *** results show that the axial swelling strain of mudstone decreases with increase of the vertical *** low vertical stresses,moisture absorption in mudstone leads to formation of cracks caused by hydration-induced *** high vertical stresses,a muddy sealing zone forms on the mudstone surface,preventing further water *** simulation results of mudstone swelling deformation also demonstrate that it involves both swelling of the mudstone matrix and swelling caused by crack ***,crack expansion plays a dominant role in mudstone *** increasing vertical stress,the cracks in mudstone change from tensile cracks to shear cracks,resulting in a significant reduction in the total number of *** the evolution of mudstone kinetic energy shows similarities under different vertical stresses,the evolution of strain energy varies significantly due to the presence of different types of cracks in the *** findings provide a theoretical basis for understanding the hygroscopic swelling deformation mechanism of red-bed mudstone at various depths.

关键词： Heterogeneous red-bed mudstone Self-sealing band Matric swelling and crack expansion FDEM Microcracks Energy evolution

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Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative

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Petroleum Science 2024年第2期21卷 1429-1443页

作者： Bao-Jun Tang Chang-Jing Ji yu-Xian Zheng kang-Ning Liu Yi-fei Ma Jun-yu Chen Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing100081China School of Management and Economics Beijing Institute of TechnologyBeijing100081China Collaborative Innovation Center of Electric Vehicles in Beijing BeijingChina Sustainable Development Research Institute for Economy and Society of Beijing BeijingChina Institute of Carbon Neutrality ShanghaiTech UniversityShanghai201210China

With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative.

关键词： Belt and Road Initiative Oil and Gas Investment Risk assessment

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Tuning hybrid liquid/solid electrolytes by lowering Li salt concentration for lithium batteries

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Chinese Physics B 2018年第6期27卷 488-495页

作者： Wei Yang Qi-Di Wang yu Lei Zi-Pei Wan Lei Qin Wei yu Ru-Liang Liu Deng-yun Zhai Hong Li Bao-Hua Li fei-yu kang Advanced Materials Institute Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China Materials Science Institute PCFM Laboratory and GDHPPC Laboratory School of Chemistry Sun Yat-sen University Guangzhou 510275 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Hybrid liquid/solid electrolytes（HLSEs） consisting of conventional organic liquid electrolyte（LE）, polyacrylonitrile（PAN）, and ceramic lithium ion conductor Li（1.5）Al（0.5）Ge（1.5）（PO4）3（LAGP） are proposed and investigated. The HLSE has a high ionic conductivity of over 2.25 × 10^（-3） S/cm at 25？C, and an extended electrochemical window of up to 4.8 V versus Li/Li＋. The Li｜HLSE｜Li symmetric cells and Li｜HLSE｜Li FePO4 cells exhibit small interfacial area specific resistances（ASRs） comparable to that of LE while much smaller than that of ceramic LAGP electrolyte, and excellent performance at room temperature. Bis（trifluoromethane sulfonimide） salt in HLSE significantly affects the properties and electrochemical behaviors. Side reactions can be effectively suppressed by lowering the concentration of Li salt. It is a feasible strategy for pursuing the high energy density batteries with higher safety.

关键词： lithium battery hybrid liquid/solid electrolyte interfacial resistance salt concentration

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Breakthrough in Li-mediated continuous electrosynthesis of ammonia

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Science China Chemistry 2024年第10期67卷 3191-3192页

作者： fei Zhan Chang yu State Key Laboratory of Chemical Resource Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Fine Chemicals Liaoning Key Lab for Energy Materials and Chemical EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

Ammonia(NH3)ranks among the manufactured chemicals,with an annual production surpassing 182 million tons[1],which is an indispensable raw material for fertilizer industry and has been recognized as a promising carbon-... 详细信息

关键词： ammonia Ammonia suppl

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Partial Linear Model Averaging Prediction for Longitudinal Data

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Journal of Systems Science & Complexity 2024年第2期37卷 863-885页

作者： LI Na fei yu ZHANG Xinyu Faculty of Science Kunming University of Science and TechnologyKunming 650500China School of Statistics and Mathematics Yunnan University of Finance and EconomicsKunming 650221China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

Prediction plays an important role in data *** averaging method generally provides better prediction than using any of its *** though model averaging has been extensively investigated under independent errors,few authors have considered model averaging for semiparametric models with correlated *** this paper,the authors offer an optimal model averaging method to improve the prediction in partially linear model for longitudinal *** model averaging weights are obtained by minimizing criterion,which is an unbiased estimator of the expected in-sample squared error loss plus a *** properties,including asymptotic optimality and consistency of averaging weights,are established under two scenarios:(i)All candidate models are misspecified;(ii)Correct models are available in the candidate *** studies and an empirical example show that the promise of the proposed procedure over other competitive methods.

关键词： Asymptotic optimality longitudinal data model averaging estimator partially linear model prediction

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Genetic insights into adaptation of alfalfa

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Molecular Plant 2024年第8期17卷 1170-1171页

作者： Yafei Guo Lipeng kang fei Lu State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChineseAcademyof SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina CAS-JIC Centre of Excellence for Plant and Microbial Science(CEPAMS) Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina

Climate change is increasingly affecting agricultural outputs,as evidenced by the changing global temperature and extreme weather events that significantly impact crop yields(Lesk et al.,2016).To address this challenge,there is a growing interest in developing crops that can endure these adverse conditions to ensure food *** examples in nature show how crops have adapted to diverse environments(Gutaker and Purugganan,2023),leaving behind a rich genomic *** genomics has started to provide insights into these adaptive processes from evolutionary and genetic perspectives(Savolainen et al.,2013;Aguirre-Liguori et al.,2021;Sang et al.,2022).Recently,Zhang et al.(Zhang et al.,2024)investigated alfalfa(Medicago sativa ***),known as the"queen of forages,"for its broad *** analyzing whole-genome sequencing data of 702 accessions from 24 Medicago species,this study enriches our understanding of how to develop crops and meet the challenges of climate change.

关键词： sativa crops environments

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Parallel Light Fields: A Perspective and A Framework

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 542-544页

作者： fei-yue Wang yu Shen IEEE State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of ScienceBeijing 100049

Dear Editor,Light fields give relatively complete description of scenes from perspective of angles and positions of rays. At present time, most of the computer vision algorithms take 2D images as input which are simplified expression of light fields with depth information discarded. In theory, computer vision tasks may achieve better performance as long as complete light fields are acquired.

关键词： computer Framework simplified

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Reduction of unactivated alkyl chlorides enabled by light-induced single electron transfer

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Science China Chemistry 2024年第2期67卷 471-481页

作者： Lei Dai Zhao-fei Zhang Xiang-yu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing100049China Institute of Chemistry Chinese Academy of SciencesBeijing100190China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou256606China

Alkyl chlorides are abundant and easily accessible starting ***,due to the high reduction potentials associated with unactivated alkyl chlorides,achieving their single electron reduction remains a persistent *** challenge has spurred the exploration of efficient activation methods to overcome this *** recent years,photocatalysis has emerged as a mild and potent tool for the single electron reduction of unactivated alkyl chlorides,opening up new possibilities in this *** the rapid advancements in this area,a comprehensive review that provides a conceptual understanding of this emerging field,with a specific focus on reaction design and catalytic mechanisms,would be timely and highly ***,we present an overview of various synthetic techniques for photoinduced single electron reduction of unactivated alkyl ***,we also discuss the limitations of the present methods and future directions that lie ahead in this field.

关键词： photocatalysis unactivated alkyl chlorides single electron transfer radical reactions

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