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Wuhan University Journal of Natural Sciences 2024年第4期29卷 297-300页

作者： chen Long chen Ming chen zhongxue Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan 430072HubeiChina School of Energy and Power Engineering Huazhong University of Science&TechnologyWuhan 430074HubeiChina

Carbonate-based electrolytes still retain their top preference in sodium-ion battery(SIB)as in lithium-ion battery(LIBs)owing to their cost-effectiveness and ***,extensive studies have consistently demonstrated a mismatch between the hard carbon(HC)anode and carbonate-based electrolytes[1,2].Specifically,as for lowconcentration carbonate-based electrolytes(LCEs).

关键词： battery carbonate Helmholtz

Extending the solid solution range of sodium ferric pyrophosphate:Off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)as a novel cathode for sodium‐ion batteries

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Carbon Energy 2024年第4期6卷 128-139页

作者： Xiang jun Pu Kunran Yang Zibing Pan Chunhua Song Yangyang Lai Renjie Li Zheng‐Long Xu zhongxue chen Yuliang Cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhanChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhouJiangsuChina Zonergy Corporation ZigongSichuanChina Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina

Iron‐based pyrophosphates are attractive cathodes for sodium‐ion batteries due to their large framework,cost‐effectiveness,and high energy ***,the understanding of the crystal structure is scarce and only a limited candidates have been reported so *** this work,we found for the first time that a continuous solid solution,Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2)(0≤α≤1,could be obtained by mutual substitution of cations at center‐symmetric Na3 and Na4 sites while keeping the crystal building blocks of anionic P_(2)O_(7) *** particular,a novel off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)is thus proposed,and its structure,energy storage mechanism,and electrochemical performance are extensively investigated to unveil the structure–function *** as‐prepared off‐stoichiometric electrode delivers appealing performance with a reversible discharge capacity of 83 mAh g^(−1),a working voltage of 2.9 V(***^(+)/Na),the retention of 89.2%of the initial capacity after 500 cycles,and enhanced rate capability of 51 mAh g^(−1)at a current density of 1600 mA g^(−1).This research shows that sodium ferric pyrophosphate could form extended solid solution composition and promising phase is concealed in the range of Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2),offering more chances for exploration of new cathode materials for the construction of high‐performance SIBs.

关键词： extending solid‐solution range off‐stoichiometric Na_(3)Fe_(2.5)(P_(2)O_(7))_(2) sodium‐ion batteries structure-function relationship

Octylamine-Supporting Interlayer Expanded Molybdenum Diselenide as a High-Power Cathode for Rechargeable Mg Batteries

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Energy & Environmental Materials 2023年第6期6卷 191-198页

作者： Dong chen Xin Ren Ting Li zhongxue chen Yu liang Cao Fei Xu Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission&Ministry of Education College of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan 430074China Hubei Key Lab of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhan 430072China

Rechargeable Mg batteries(RMBs)are a promising large-scale energy-storage technology with low cost and high safety,but the performance is limited by the inferior kinetics of Mg-intercalation *** the present study,an octylamine-supporting interlayer expanded molybdenum diselenide(e-MoSe_(2))is synthesized and used as cathode for RMBs,in comparison with ordinary crystalline MoSe_(2).The octylamine molecules introduced show a strong interaction with the MoSe_(2)layers and increase the layer spacing significantly from 6.46 to 11.5Å.e-MoSe_(2)shows a high Mg-storage capacity of 238 mAh g^(-1)at 50 mA g^(-1)and a superior rate performance of 39 mAh g^(-1)at 10 A g1,far advantageous over crystalline MoSe_(2).e-MoSe_(2)also shows a considerably high structure stability during repeated magnesiation/demagnesiation,providing an outstanding cycling stability for 1000 *** electrochemical tests demonstrate the high Mg^(2+)diffusion coefficients in e-MoSe_(2).Theoretical computation indicates the interlayer expansion changes the Mg^(2+)diffusion paths from"hollow site→hollow site"to"hollow site→Se atom site→hollow site",largely decreasing the energy barrier and improving the Mg^(2+)diffusion *** present work highlights an efficient strategy for the improvement of Mg-storage performance for RMB cathodes.

关键词： batteries electrodes nanomaterials

基于活性炭‖Na_(0.44)MnO_(2)的低成本、高倍率和长寿命碱性钠离子电池电容器

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物理化学学报 2024年第2期40卷 87-88页

作者：薛晴李圣驿赵亚楠盛鹏徐丽李正曦张波李慧王博杨立滨曹余良陈重学北京智慧能源研究院北京102200 武汉大学化学与分子科学学院化学电源材料与技术湖北省重点实验室武汉430072 国网青海省电力公司经济技术研究院西宁810008 国网金华供电公司浙江金华321017 武汉大学动力与机械学院水力机械过渡过程教育部重点实验室武汉430072

水系钠离子电池电容器具有成本低、功率大、安全性好等优点,是下一代大规模储能系统的理想选择之一。本文采用Na_(0.44)MnO_(2)正极、活性炭(AC)负极、6mol·L^(-1)NaOH电解液和廉价的不锈钢集流体构建了可充电碱性钠离子电池电容器。由... 详细信息

水系钠离子电池电容器具有成本低、功率大、安全性好等优点,是下一代大规模储能系统的理想选择之一。本文采用Na_(0.44)MnO_(2)正极、活性炭(AC)负极、6mol·L^(-1)NaOH电解液和廉价的不锈钢集流体构建了可充电碱性钠离子电池电容器。由于Na_(0.44)MnO_(2)正极在碱性电解液中具有较高的过充耐受性,通过首次充电时的原位过充预活化过程可以解决半钠化Na_(0.44)MnO_(2)正极和AC负极初始库伦效率低的缺点。因此,AC‖Na_(0.44)MnO_(2)可充电碱性钠离子电池电容器具有优异的电化学性能,在功率密度为85 W·kg^(-1)时,能量密度达26.6 Wh·kg^(-1),循环10000次后容量保持率为89%。同时,在50℃的高温和-20℃的低温也具有良好的电化学性能。这些结果表明AC‖Na_(0.44)MnO_(2)可充电碱性钠离子电池电容器具备应用于大规模储能的潜力。

关键词：钠离子电池电容碱性电解液过充自保护低成本宽工作温程

Improved Initial Charging Capacity of Na-poor Na0.44MnO2 via Chemical Presodiation Strategy for Low-cost Sodium-ion Batteries

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Chemical Research in Chinese Universities 2021年第2期37卷 274-279页

作者： ZHOU Xi LAI Yangyang WU Xiangjiang chen zhongxue ZHONG Faping Al Xinping YANG Hanxi CAO Yuliang Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072P.R.China Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan430072P.R.China National Engineering Research Center of Advanced Energy Storage Materials Hunan410205P.R.China

Sodium-ion batteries(SIBs)are promising for grid-scale energy storage applications due to the natural abundance and low cost of *** various Na insertion cathode materials,Na0.44MnO2 has attracted the most attention because of its cost effectiveness and structural ***,the low initial charge capacity for Na-poor Na0.44MnO2 hinders its practical ***,we developed a facile chemical presodiated method using sodiated biphenly to transform Na-poor Na0.44MnO2 into Na-rich *** presodiation,the initial charge capacity of Na0.44MnO2 is greatly enhanced from 56.5 mA·h/g to 115.7 mA·h/g at 0.1 C(1 C=121 mA/g)and the excellent cycling stability(the capacity retention of 94.1%over 200 cycles at 2 C)is *** presodiation strategy would open a new avenue for promoting the practical applications of Na-poor cathode materials in sodium-ion batteries.

关键词： Sodium-ion battery Na0.44MnO2 Chemical presodiation Sodium biphenyl Initial charge capacity

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无运放高阶温度补偿的基准电路设计

固体电子学研究与进展 2016年第2期36卷 159-164页

作者：陈忠学唐杰章国豪广东工业大学信息工程学院广州510006

基于带隙基准源的工作原理以及如何提高温度特性的思想,设计了一种无运算放大器且具有新型高阶温度补偿的带隙基准电路。通过对传统带隙基准电路结构的改进,提出一种新的高阶温度补偿方法。该电路在不使用运放的情况下,分别产生较为精... 详细信息

基于带隙基准源的工作原理以及如何提高温度特性的思想,设计了一种无运算放大器且具有新型高阶温度补偿的带隙基准电路。通过对传统带隙基准电路结构的改进,提出一种新的高阶温度补偿方法。该电路在不使用运放的情况下,分别产生较为精准的正、负温度系数电流,通过共源-共栅电流镜将负温度系数电流降阶,并对其一阶、二阶温度系数进行补偿。电路采用0.18μm CMOS工艺实现,芯片尺寸为240μm×220μm,电源抑制比(PSRR)-64dB。测试结果表明:输出基准电压均值为580.6 mV,在-45~120℃范围内温度系数为7.5×10-6/℃,整个电路的功耗为45μW。

关键词：无运放高阶补偿温度系数带隙基准源

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桩基非线性轴向振动的多时间尺度分析

振动与冲击 2007年第5期26卷 54-59页

作者：胡春林程昌钧陈中学上海大学上海市应用数学与力学研究所力学系上海200072 武汉理工大学土木工程与建筑学院武汉430070

假定桩基及桩周土的材料满足非线性弹性和线性粘弹性本构关系,给出了分析桩基轴向振动的非线性偏微分方程。用多时间尺度法推导出一端固定、另一端自由的桩基非线性轴向自由振动的n-阶主频率和位移的近似表达式,给出了数值算例,考察了... 详细信息

假定桩基及桩周土的材料满足非线性弹性和线性粘弹性本构关系,给出了分析桩基轴向振动的非线性偏微分方程。用多时间尺度法推导出一端固定、另一端自由的桩基非线性轴向自由振动的n-阶主频率和位移的近似表达式,给出了数值算例,考察了参数的影响。研究结果表明:非线性系统的n-阶主频率不仅与线性系统的n-阶固有频率有关,而且也与振幅、阻尼系数和材料的非线性特征量有关;系统的响应中除含有主频率的谐波外,还含有2倍、3倍的主频率的高次谐波和二个或三个主频率的和或差的谐波存在。

关键词：桩的非线性轴向自由振动主频率和响应的近似表达式多时间尺度法参数的影响

Profile of Dr. Songlin chen

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Science China Life Sciences 2024年第10期67卷 2062-2063页

作者： chen, Songlin Yellow Sea Fisheries Res Inst Qingdao Peoples R China

For decades, Dr. chen has been engaged in fish germplasm preservation, sex control and research focusing on molecular breeding for disease resistance. He discovered the first sex-specific molecular marker of fish(chen et al., 2007),deciphered the first fish genome(Chinese tongue sole) in China, revealed the sex determination mechanism in fish(chen et al., 2014), and created molecular sex control technology. He also discovered the molecular mechanism of metamorphosis in flatfish(Shao et al., 2017) and developed China's first fish disease-resistant breeding gene chip, “YUXIN No.1”.

关键词： TURBOT SCOPHTHALMUS-MAXIMUS GENOMIC SELECTION JAPANESE FLOUNDER SEX-CHROMOSOME CELL-LINE CRYOPRESERVATION EVOLUTION EMBRYOS

Effect of Reclamation on the Groundwater-Lake Water Interaction in chen Lake

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Journal of Earth Science 2024年第3期35卷 1083-1086页

作者： Kun Lei Teng Ma Liuzhu chen Zhenxing Li Yu chen School of Environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China

0 INTRODUCTION To relieve the short supply of suitable land for residing,cultivating,and commerce,it is accepted to reclaim land from lakes,river estuaries,and coastal regions in many countries(Mancini et al.,2020).The large-scale reclamation activities have an irreversible effect on the mico-geomorphology and hydrodynamic system of seasonally flooded areas(Zhang et al.,2019;Yu et al.,2018).For example,coastal regions reclaimed extended the groundwater flow paths,as well as created groundwater level rise,resulting in water-logging in the reclaimed area(Hu et al.,2008).Similar changes in groundwater flow systems may alter groundwater-lake water interactions,and it can ultimately affect the water cycle in the lake ***,such detailed studies are presently *** addition,natural exchanges between the lake and groundwater systems can be strongly affected by physical hydrological processes(Javadzadeh et al.,2020),chemical properties(Kamtchueng et al.,2015),and bioto behavior(Hancock et al.,2005).

关键词： groundwater coastal logging

Meridional deflection of global eddy propagation derived from tandem altimetry: Mechanism and implication

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Science China Earth Sciences 2024年第3期67卷 811-825页

作者： Ge chen Xiaoyan chen Frontiers Science Center for Deep Ocean Multispheres and Earth System School of Marine TechnologyOcean University of ChinaQindao 266100China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQindao 266237China

A common view on meridional deflection of eddy propagation is poleward for cyclones and equatorward for anticyclones. This widely accepted polarity-sensitive pattern has been increasingly undermined given that it is systematically violated on both zonal and regional scales as recently reported. Here, we approach the problem by exploring these violations in terms of eddy effects of spatiotemporal geostrophy, thermal fading, and flow dragging, yielding the following main conclusions.(1) The polarity-dependent deflection discrepancy is a pseudo feature resulting from a biased fit to the normalized eddy tracks which are spatially asymmetric(though azimuthally symmetric) between the two signs;Instead, the primary pattern of eddy deflection appears to be geographically correlated and polarity independent.(2) Geostrophic adjustment plays a critical role in defining the meridional movement of an eddy. Specifically, a consistent poleward(equatorward) trajectory bending of spatially(temporally) ageostrophic eddies is observed irrespective of their polarity.(3) The mechanism of eddy deflection is also determined by its zonal propagation direction. Westward propagating eddies are substantially affected by thermal fading, while opposite ones by flow dragging. A realistic and comprehensive understanding of eddy deflection mechanisms serves as a significant contribution to the prediction of eddy trajectory, and the protection of ocean environment.

关键词： Mesoscale eddies Eddy propagation Eddy meridional deflection Satellite observation Geostrophic adjustment