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In Situ Monitoring the Potassium‑Ion Storage Enhancement in Iron Selenide with Ether‑Based Electrolyte

Nano-Micro Letters 2021年第11期13卷 294-307页

作者： Xiaodan Li Jinliang Li wenchen zhuo Zhibin Li Liang Ma Zhong Ji Likun Pan Wenjie Mai Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632People’s Republic of China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241People’s Republic of China

As one of the promising anode materials,iron selenide has received much attention for potassium-ion batteries(KIBs).Nevertheless,volume expansion and sluggish kinetics of iron selenide result in the poor reversibility and stability during potassiation–depotassiation *** this work,we develop iron selenide composite matching ether-based electrolyte for KIBs,which presents a reversible specific capacity of 356 mAh g^(−1) at 200 mA g^(−1) after 75 *** to the measurement of mechanical properties,it is found that iron selenide composite also exhibits robust and elastic solid electrolyte interphase layer in ether-based electrolyte,contributing to the improvement in reversibility and stability for *** further investigate the electrochemical enhancement mechanism of ether-based electrolyte in KIBs,we also utilize in situ visualization technique to monitor the potassiation–depotassiation *** comparison,iron selenide composite matching carbonate-based electrolyte presents vast morphology change during potassiation–depotassiation *** changing to ether-based electrolyte,a few minor morphology changes can be *** phenomenon indicates an occurrence of homogeneous electrochemical reaction in ether-based electrolyte,which results in a stable performance for potassium-ion(K-ion)*** believe that our work will provide a new perspective to visually monitor the potassium-ion storage process and guide the improvement in electrode material performance.

关键词： Iron selenide Ether-based electrolyte In situ visualization technique Potassium-ion batteries

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Insights on the mechanism of Na-ion storage in expanded graphite anode

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Journal of Energy Chemistry 2021年第2期30卷 56-62,I0003页

作者： Xiaodan Li Zhibin Liu Jinliang Li Hang Lei wenchen zhuo Wei Qin Xiang Cai Kwun Nam Hui Likun Pan Wenjie Mai Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongChina Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China Department of Chemistry Jinan UniversityGuangzhou 510632GuangdongChina College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114HunanChina Department of Light Chemical Engineering Guangdong PolytechnicFoshan 528041GuangdongChina Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078China

Currently,Na-ion battery(NIB) has become one of the most potential alternatives for Li-ion batteries due to the safety and low *** a promising anode for Na-ion storage,expanded graphite has attracted considerable ***,the sodiation-desodiation process is still *** our work,we obtain expanded graphite through slight modified Hummer's method and subsequent thermal treatment,which exhibits excellent cycling *** at a high current density of 1 A g^(-1),our expanded graphite still remains a high reversible capacity of 100 mA h g^(-1) after 2600 ***,we also investigate the electrochemical mechanism of our expanded graphite for Na-ion storage by operando Raman technique,which illuminate the electrochemical reaction during different sodiation-desodiation processes.

关键词： Expanded graphite Sodiation-desodiation process Operando Raman spectroscopies Na-ion batteries

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Ultrahigh “Relative Energy Density” and Mass Loading of Carbon Cloth Anodes for K-Ion Batteries

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CCS Chemistry 2021年第2期3卷 791-799页

作者： Junpeng Xie Jinliang Li Xiaodan Li Hang Lei wenchen zhuo Xibo Li Guo Hong Kwun Nam Hui Likun Pan Wenjie Mai Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632 Institute of Applied Physics and Materials Engineering(IAPME) University of Macao.Department of Physics and ChemistryFaculty of Science and TechnologyUniversity of MacaoMacao SAR 999078 Department of Chemistry Jinan UniversityGuangzhou 510632 Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062

Mass loading and potential plateau are the two most important issues of potassium(K)-ion batteries(KIBs),but they have long been ignored in previous ***,we report a simple and scalable method to fabricate acidized carbon clothes(A-CC)as high mass loading(13.1 mg cm−2)anode for KIBs,which achieved a reversible areal-specific capacity of 1.81 mAh cm−2 at 0.2 mA cm−***,we have proposed the concept of“relative energy density”to reasonably evaluate the electrochemical performance of the *** to our calculation method,the A-CC electrode exhibited an ultrahigh relative energy density of 46 Wh m−2 in the initial charge process and remained at 40 Wh m−2 after 50 ***,we performed the operando Raman spectroscopy(ORS)to investigate the K-ion storage *** believe that our work might provide a new guideline for the evaluation of anode performance,thereby,opening an avenue for the development of commercial anode.

关键词： acidized carbon clothes relative energy density high mass loading operando Raman spectra,K-ion batteries

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H62黄铜超薄板微搅拌摩擦焊接热机特征与接头组织性能研究

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机械工程学报 2020年第12期56卷 65-72页

作者：张昌青秦卓荣琛师文辰王树文王希靖兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050

铜及铜合金的微连接可在航空技术、电子技术及能源技术等方面广泛应用,但材料的软化温度高、薄板焊缝区塑性金属减少带来的摩擦产热减少、薄板比表面积增大带来的传热速度快等问题,使得微搅拌摩擦焊接(Micro friction stir welding,μF... 详细信息

铜及铜合金的微连接可在航空技术、电子技术及能源技术等方面广泛应用,但材料的软化温度高、薄板焊缝区塑性金属减少带来的摩擦产热减少、薄板比表面积增大带来的传热速度快等问题,使得微搅拌摩擦焊接(Micro friction stir welding,μFSW)工艺过程易产生焊接缺陷而不利于接头成形。以0.6mm厚的超薄板H62黄铜为研究对象,开展对接焊接试验研究,深入研究不同工艺参数下接头的微观组织、力学性能及断口形貌,进而优化工艺参数;在此基础上,分析该工艺过程中温度、轴向力和横向力的变化规律。研究表明:工艺优化后的焊缝成形良好,接头最大抗拉强度达370MPa,约母材(Basemetal,BM)的92.5%;焊缝处的热影响区(Heataffectedzone,HAZ)、热机影响区(Thermo-mechanically affected zone,TMAZ)、焊核区(Nugget zone,NZ)存在明显的分界线,且NZ在横向和纵向上晶粒形状和尺寸存在不均匀性,NZ硬度最高约为155.4HV(约BM的119.5%),断裂失效易发生在硬度最小的位置(Advancingsideoftheweld,AS),其失效机理为韧性断裂。在μFSW过程,稳定的轴向力和横向力可提供适当的热输入量以及更好的挤压和搅拌作用,从而得到性能良好的焊缝。通过对高熔点铜及其合金超薄板的搅拌摩擦焊的基础研究,从而为微连接技术的材料推广提供技术支撑。

关键词： H62黄铜微搅拌摩擦焊过程分析显微组织抗拉强度

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厌氧+两级AO工艺处理奶牛养殖场废水

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山东化工 2022年第9期51卷 215-217页

作者：李卓潘文琛余倍湖南中车环境工程有限公司湖南长沙410000 郑州财经学院河南郑州450044

采用厌氧+两级AO工艺处理奶牛养殖场废水,工程实践表明该工艺对奶牛场废水处理效果好,运行稳定,大幅度削减了废水中的有机物含量,处理出水的COD,BOD,NH3-N等指标均能达到《污水综合排放标准》(GB 8978—1996)一级标准的排放要求。

关键词：厌氧+两级AO工艺奶牛场养殖废水

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地埋式一体化AO工艺处理锂离子电池电解液生产废水工程实例

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山东化工 2018年第6期47卷 153-155页

作者：潘文琛李桂荣李卓郑州财经学院土木工程学院河南郑州450044 郑州大学水利与环境学院河南郑州450002 湖南先科环保有限公司湖南长沙410000

针对废水有机成分复杂,且石油及氨氮浓度比较高等特点,某公司采用选用"地埋式一体化AO工艺"的方式进行处理。运行结果表明,在进水COD浓度为2000~5500 mg/L、进水石油类浓度为3300~8200mg/L时,其出水效果显著且各项指标均达到《污水综合... 详细信息

针对废水有机成分复杂,且石油及氨氮浓度比较高等特点,某公司采用选用"地埋式一体化AO工艺"的方式进行处理。运行结果表明,在进水COD浓度为2000~5500 mg/L、进水石油类浓度为3300~8200mg/L时,其出水效果显著且各项指标均达到《污水综合排放标准》(GB 8978-1996)的三级排放标准。

关键词：锂离子电池电解液废水地埋式一体化 AO工艺

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