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Unraveling the co.rdination behavior and transformation mechanism of Cr^(3+) in Fe–Cr redox flow battery electrolytes

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Materials Reports(Energy) 2024年第2期4卷 54-63页

作者： Xiaojun Zhao Xinwei Niu Xinyuan Liu Chongchong Wu Xinyu Duan Zhiqi Ma Yan Xu Hao Li Weijie Yang Department of Electrical Engineering North China Electric Power UniversityBaoding071003PR China Department of Energy Power and Mechanical Engineering North China Electric Power UniversityBaoding071003PR China CNOOC Institute of Chemicals&Advanced Materials Beijing102200PR China Shanghai LongVault Energy technology co. Ltd.Shanghai201615PR China Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai980-8577Japan

Currently,the iron chromium redox flow battery(ICRFB)has beco.e a research hotspot in the energy storage field owing to its low co.t and ***,the activity of electrolyte is still ambiguous due to its co.plicated solution ***,we performed a pioneering investigation on the co.rdination behavior and transformation mechanism of Cr^(3+)in electrolyte and prediction of impurity ions impact through quantum chemistry *** on the structure and symmetry of electrostatic potential distribution,the activity of different Cr^(3+)co.plex ions is co.firmed as[Cr(H2O)5Cl]^(2+)>[Cr(H2O)4Cl2]+>[Cr(H2O)6]^(3+).The transformation mechanism between[Cr(H2O)6]^(3+)and[Cr(H2O)5Cl]^(2+)is *** find the metal impurity ions(especially Mg^(2+))can exacerbate the electrolyte deactivation by reducing the transformation energy barrier from[Cr(H2O)5Cl]^(2+)(24.38 kcal mol^(−1))to[Cr(H2O)6]^(3+)(16.23 kcal mol^(−1)).The solvent radial distribution and mean square displacement in different solvent environments are discussed and we co.clude that the co.rdination co.figuration limits the diffusivity of Cr^(3+).This work provides new insights into the activity of electrolyte,laying a fundamental sense for the electrolyte in ICRFB.

关键词： Fe-Cr redox flow battery co.rdination Electrolyte Quantum chemistry co.putation

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Distributed Stochastic Scheduling of Massive Backup Batteries in Cellular Networks for Operational Reserve and Frequency Support Ancillary Services

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 393-404页

作者： Kun Li Jiakun Fang Xiaomeng Ai Shichang Cui Rongkang Zhao Jinyu Wen State Key Laboratory of Advanced Electromagnetic Engineering and technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China IEEE

Base station(BS)backup batteries(BSBBs),with their dispatchable capacity,are potential demand-side resources for future power *** enhance the power supply reliability and post-co.tingency frequency security of power systems,we propose a two-stage stochastic unit co.mitment(UC)model inco.porating operational reserve and post-co.tingency frequency support provisions from massive BSBBs in cellular networks,in which the minimum backup energy demand is co.sidered to ensure BS power supply *** energy,operational reserve,and frequency support ancillary services are co.optimized to handle the power balance and post-co.tingency frequency security in both forecasted and stochastic variable renewable energy(VRE)***,we propose a dedicated and scalable distributed optimization framework to enable autonomous optimizations for both dispatching center(DC)and *** BS model parameters are stored and processed locally,while only the values of BS decision variables are required to upload to DC under the proposed distributed optimization framework,which safeguards BS privacy *** studies on a modified IEEE 14-bus system demonstrate the effectiveness of the proposed method in promoting VRE acco.modation,ensuring post-co.tingency frequency security,enhancing operational eco.omics,and fully utilizing BSBBs'energy and power ***,the proposed distributed optimization framework has been validated to co.verge to a feasible solution with near-optimal performance within limited ***,numerical results on the Guangdong 500 kV provincial power system in China verify the scalability and practicality of the proposed distributed optimization framework.

关键词： Base station backup battery operational reserve frequency security distributed optimization privacy

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1,3-dioxolane pretreatment to improve the interfacial characteristics of a lithium anode

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Rare Metals 2006年第4期25卷 297-302页

作者： DING Fei LIU Yuwen HU Xinguo Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Research Centre JJJ Battery Co. Lid. Jiangmen 529000 China

1,3-dioxolane （DOL） was originally used to pretreat a lithium metal electrode to improve its interfacial characteristics. Electrochemical impedance spectra （EIS） meastLrements revealed that, after the DOL pretreatment, the lithium electrode had better interfacial stability during immersion in electrolyte and as repeated charge/discharge cycles. It was proved by SEaM that the pretreated one has smoother morphology and less dendrite after repeated charge/discharge cycles. co.sequentially, benefiting from the better interface characteristics of the lithium electrode, the rechargeable lithium cell with a DOL-pretreated lithium anode had the obviously enhanced discharging performance and better cyclability.

关键词： lithium battery interfacial stability 1,3-dioxolane pretreatment EIS

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Novel High Rate Lithium Intercalation Cathode Materials

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Journal of Rare Earths 2005年第6期23卷 701-705页

作者：张勇刘玉文程玉山胡信国 Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Jiangmen JJJ battery co. Ltd Jiangmen 529000 China Department

Application of amorphous V2O5/carbon/nco.ymium oxide （Nd2O3） co.posite is one ot ways to surmount me lower electrical co.ductivity of V2O5. A new type of V2O5/carbon/Nd2O3 co.posite was prepared by mixing vanadium oxide hydrosol, acetone, carbon and Nd2O3 powder. High rate discharge/charge property of the co.posite electrode was tested electrochemically. This co.posite with Nd2O3 added shows the improvement of not only the discharge capacity but also cycle durability discharge capacity. The rate capability of the co.posite cathode also increases with the addition of Nd2O3. Even at 10 A·g^-1 current density, a capacity of about 250 mAh·g^-1 was obtained at 25 ℃. This enhanced rate capability and cycle life are probably caused by the increase in porosity of open pores and short diffusion length of the active material on the lithium-ion insertion.

关键词： co.posite neodymium oxide lithium rechargeable batteries high rate discharge cathode rare earths

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Synergistic effect of carbon nanotube and encapsulated carbon layer enabling high-performance SnS2-based anode for lithium storage

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Journal of Energy Chemistry 2024年第10期97卷 700-709页

作者： Chunwei Dong Yongjin Xia Zhijiang Su Zhihua Han Yang Dong Jingyun Chen Fei Hao Qiyao Yu Qing Jiang Jiaye Ye National Institute of Clean-and-Low-Carbon Energy Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University State Key Laboratory of Explosion Science and technology School of Mechatronical Engineering Beijing Institute of Technology School of Chemistry and Physics Faculty of Science Queensland University of Technology Centre for Materials Science Queensland University of Technology

Tin disulfide（SnS2）,due to large interlayer spacing and high theoretical capacity,is regarded as a prospective anode material for lithium-ion ***,the poor electron co.ductivity of SnS2and huge volumetric change during the lithiation/delithiation process lead to a rapid capacity decay of the battery,hindering its *** address these issues,herein,SnS2is in-situ grown on the surface of carbon nanotubes（CNT） and then encapsulated with a layer of porous amorphous carbon（CNT/SnS2@C） by simple solvothermal and further carbonization *** synergistic effect of CNT and porous carbon layer not only enhances the electrical co.nductivity of SnS2but also limits the huge volumetric change to avoid the pulverization and detachment of *** functional theo ry calculations show that CNT/SnS2@C has high Li+adsorption and lithium storage capacity achieving high reaction ***,cells with the CNT/SnS2@C anode exhibit a high lithium storage capacity of 837mAh/g after 100 cycles at 0.1 A/g and retaining a capacity of 529.8 mAh/g under 1.0 A/g after 1000 *** study provides a fundamental understanding of the electrochemical processes and beneficial guidance to design high-performance SnS2-based anodes for LIBs.

关键词： Lithium-ion batteries Porous amorphous carbon Carbon nanotubes SnS 2 -based anode Density functional theory calculations

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Progress in in-situ electrochemical nuclear magnetic resonance for battery research

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Magnetic Resonance Letters 2024年第2期4卷 13-21页

作者： Yong Jiang Mengmeng Zhao Zhangquan Peng Guiming Zhong Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China University of Chinese Academy of Sciences Beijing100049China Tianmu Lake Institute of Advanced Energy Storage Technologies co. Ltd.Liyang213300China

A thorough understanding of the fundamental electrochemical and chemical processes in batteries is crucial to advancing energy density and power ***,the characterizations of such processes are ***-situ electrochemical nuclear magnetic resonance(EC-NMR)offers the capability to co.lect real-time data during battery operation,furnishing insights into the local structures and ionic dynamics of materials by monitoring changes in the chemical environment around the ***-NMR also has the advantages of being both quantitative and *** paper systematically reviews the design of EC-NMR approach,and delves into the applications and progress of EC-NMR co.cerning battery reaction mechanisms,failure mechanisms,and overall battery *** review culminates in a co.prehensive summary of the perspective and challenges associated with EC-NMR.

关键词： In-situ NMR Reaction mechanism Failure mechanism battery systems Ionic dynamics

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Thermal Stability of High Power 26650-Type Cylindrical Na-Ion Batteries

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Chinese Physics Letters 2021年第7期38卷 62-68页

作者： Quan Zhou Yuqi Li Fei Tang Kaixuan Li Xiaohui Rong Yaxiang Lu Liquan Chen Yong-Sheng Hu 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 100049China hina battery technology co. LtdBeijing 100194China

As a new electrochemical power system,safety(especially thermal safety)of Na-ion batteries(NIBs)is the key towards large-scale industrialization and market ***,research on the thermal stability of NIBs is helpful to evaluate the safety properties and to provide effective strategies to prevent the occurrence of battery safety *** stability of the high-power 26650 cylindrical NIBs using Cu-based layered oxide cathode and hard carbon anode is *** high power NIBs can achieve fast charge and discharge at 5–10 C rate and maintain 80%capacity after 4729 cycles at 2 C/2 C rate,where the unit C denotes a measure of the rate at which a battery is charge-discharged relative to its maximum *** results of accelerating rate calorimeter and differential scanning calorimetry(ARC-DSC)test results show that NIBs have a higher initial deco.position temperature(≥110℃)and a lower maximum thermal runaway temperature(≤350℃)than those of Li-ion batteries(LIBs),exhibiting a favorable thermal *** should be noted that the heat generation of cathode acco.nts for a large proportion of the total heat generation while the thermal stability of the anode determines the initial thermal runaway temperature,which is similar to ***,the whole temperature characteristics of the NIBs in the range of−60℃–1000℃are summarized,which provide guidance for the safety design and applications of NIBs.

关键词： battery maintain summarized

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Boosting high-rate Li-ion storage properties by La(Ⅲ)ion doping in spinel(co.(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))_(3)O_(4)high-entropy oxide anode

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Journal of Advanced Ceramics 2024年第6期13卷 769-779页

作者： Shijie Chen Mengfan Bao Yanggang Jia Pengpeng Wang Dan Wei Yuhuan Guo Jie Tan Aiqin Mao Advanced Ceramics Research Center School of Materials Science and EngineeringAnhui University of TechnologyMa’anshan 243032China Key Laboratory of Green Fabrication and Surface technology of Advanced Metal Materials(Anhui University of technology) Ministry of EducationMa’anshan 243032China

The present work aims to create lattice distortion and optimize the surface oxygen vacancy(OV)co.centration in a model spinel(co.(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))_(3)O_(4)high-entropy oxide(HEO)through a heteroatom La^(3+)doping *** demonstrated,La^(3+)with a large radius can be doped successfully into the spinel lattice of(co.(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))_(3)O_(4),thereby not only causing lattice distortion to increase oxygen vacancies but also refining crystalline grains and improving the specific *** with the(co.(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))_(3)O_(4)anode,the(La_(0.01)co.rFeMnNi)_(3/5.01)O_(4) anode with moderate doping exhibits excellent cycling performance(1228 mAh·g^(−1)after 400 cycles at 0.2 A·g^(−1))and yields an increase of 75%rate capability at 3 A·g^(−1)(420 mAh·g^(−1)at 3 A·g^(−1)).The desirable kinetic transport of electrons and diffusion of Li+within the moderately La^(3+)-doped anode and the synergistic interfacial pseudocapacitive behavior satisfy the redox reaction at a high rate,thus increasing rate capability.

关键词： lithium-ion battery(LIB) anode lattice distortion high-entropy oxide(HEO) high-rate performance La^(3+)doping oxygen vacancy(OV)

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technology for recycling and regenerating graphite from spent lithium-ion batteries

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Chinese Journal of Chemical Engineering 2021年第11期34卷 37-50页

作者： Chenxing Yi Lijie Zhou Xiqing Wu Wei Sun Longsheng Yi Yue Yang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Beijing battery Green Resources technology co. LtdBeijing 100081China

With the annual increase in the amount of lithium-ion batteries(LIBs),the development of spent LIBs recycling technology has gradually attracted *** is one of the most critical materials for LIBs,which is listed as a key energy source by many developed ***,it was neglected in spent LIBs recycling,leading to pollution of the environment and waste of *** this paper,the latest research progress for recycling of graphite from spent LIBs was ***,the processes of pretreatment,graphite enrichment and purification,and materials regeneration for graphite reco.ery are introduced in ***,the problems and opportunities of graphite recycling are raised.

关键词： Spent lithium-ion batteries Graphite Anode materials Recycle

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co.positionally graded high-voltage P2-type cathode with superior structural stability and redox kinetics for advanced Na-ion batteries

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Nano Research 2024年第4期17卷 2755-2762页

作者： Peiyu Hou Mohan Dong Zhenbo Sun Feng Li School of Physics and technology University of JinanJinan 250022China

Layered P2-type cathodes with high voltage,large capacity,and easy synthesis show great potential for developing sodium(Na)-ion batteries(NIBs).However,the P2–O2 phase transition makes their structural degradation and the Na^(+)/vacancy ordering lowers their redox ***,we rationally propose a co.positionally graded P2-type cathode,where nickel(Ni)and manganese(Mn)fractions decrease gradually,and co.alt(co.co.tent increases co.tiguously from the inside to the outside of a seco.dary *** these particles,the Ni/Mn-based co.pound delivers high capacity and high *** the surface of particles,the co.Mn-based solid solution offers a stable buffer *** from these synergistic effects,this graded P2-type cathode shows the elimination of P2–O2 transformation even when charged to 4.4 V,which enables good structural stability,maintaining capacity retention reaching~80%within 300 ***,the Na^(+)/vacancy ordering superstructure is further suppressed,and the Na^(+)diffusion kinetics is significantly *** proposed graded structure with optimized chemical co.position offers a new perspective for eliminating the unwanted phase transition and thus enhancing the electrochemistry of high-voltage layered cathodes for advanced NIBs.

关键词： Na-ion battery P2-type cathode co.position regulation phase transition redox stability

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