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Interfacial/bulk synergetic effects accelerating charge transferring for advanced lithium-ion capacitors

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Chinese Chemical Letters 2024年第6期35卷 168-175页

作者： Chang Liu Zirui Song Xinglan Deng Shihong Xu Renji zheng Wentao Deng hongshuai Hou Guoqiang Zou Xiaobo Ji School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China

The exploration of advanced materials through rational structure/phase design is the key to develop highperformance lithium-ion capacitors(LICs).However,high complexity of material preparation and difficulty in quantity production largely hinder the further ***,Cu_(5)FeS_(4-x)/C(CFS@C)heterojunction with rich sulfur vacancies has successfully achieved from natural bornite,presenting low costeffective and bulk-production *** functional theory(DFT)calculations indicate that rich vacancies in bulk phase can decrease band gap of bornite and thus improve its intrinsic electron conductivity,as well as the heterojunction spontaneously evokes a built-in electric field between its interfacial region,largely reducing the migration barrier from 1.27 e V to 0.75 e *** from these merits,the CFS@C electrodes deliver outperformed lithium storage performance,e.g.,high reversible capacity(822.4m Ah/g at 0.1 A/g),excellent cycling stability(up to 820 cycles at 2 A/g and 540 cycles at 5 A/g with respective capacity retention of over or nearly 100%).With CFS@C as anode and porous carbon nanosheets(PCS)as cathode,the assembled CFS@C//PCS LIC full cells exhibit high energy/power density characteristics of 139.2 Wh/kg at 2500 W/*** work is expected to offer significant insights into structure modifications/devising toward natural minerals for advanced energy-storage systems.

关键词： Bulk/interfacial modification Heterostructure Sulfur vacancies Lithium ion capacitors Capacitors

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粘性土剪切波速不确定性的统计分析

世界地震工程 2010年第S1期26卷 99-103页

作者：刘红帅郑桐薄景山刘德东齐文浩中国地震局工程力学研究所黑龙江哈尔滨150080

土体剪切波速具有显著的不确定性。基于全国地震安全性评价工作实测的粘性土的大量剪切波速数据,采用2χ检验方法研究了粘性土不同埋深的剪切波速的概率分布。依据所获得的概率分布,采用相应的统计方法给出了粘性土不同埋深的剪切波速... 详细信息

土体剪切波速具有显著的不确定性。基于全国地震安全性评价工作实测的粘性土的大量剪切波速数据,采用2χ检验方法研究了粘性土不同埋深的剪切波速的概率分布。依据所获得的概率分布,采用相应的统计方法给出了粘性土不同埋深的剪切波速的平均值、最大值、最小值、标准差和变异系数,并给出了95%参考值下限和上限,所获得的结果可用于检验场地剪切波速测试结果的可靠性和粗略估计无实测资料场地土的剪切波速。

关键词：粘性土剪切波速不确定性统计分析

厦门白城海滩地貌季节性变化的沉积物粒度响应

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应用海洋学学报 2024年第3期43卷 533-544页

作者：郑威乐曹超蔡锋戚洪帅何岩雨李元刘根赵绍华福州大学先进制造学院福建泉州362251 自然资源部第三海洋研究所海洋与海岸地质研究室福建厦门361005 自然资源部海洋生态保护修复重点实验室福建厦门361005 福建省海洋生态保护与修复重点实验室福建厦门361005 河海大学水灾害防御全国重点实验室江苏南京210024

根据厦门白城海滩2022—2023年连续4个季节的海滩剖面形态测量和表层沉积物粒度分析,探讨非典型砂泥复合型海滩地貌的季节性变化规律及其主控因素,尝试揭示海滩表层沉积物粒度结构对海滩地貌季节变化的响应过程。研究结果表明:由2022年... 详细信息

根据厦门白城海滩2022—2023年连续4个季节的海滩剖面形态测量和表层沉积物粒度分析,探讨非典型砂泥复合型海滩地貌的季节性变化规律及其主控因素,尝试揭示海滩表层沉积物粒度结构对海滩地貌季节变化的响应过程。研究结果表明:由2022年秋季至冬季、再到2023年春季,白城海滩上风向强烈侵蚀、下风向淤积,受厦门环岛顺时针向的沿岸输沙作用控制;且随着季风转向和波浪减弱,沿岸输沙减弱,海滩侵蚀强度降低。而由2023年春季至夏季,沿岸输沙进一步减弱,但白城海滩各剖面均显示不同程度的侵蚀,滩砂流失加剧,与夏季强降水引起的滩砂横向顺坡向下搬运有关,并伴随着大量游客的涌入加剧了海滩的侵蚀。白城海滩侵蚀强度强-弱-强的季节阶段性变化与沿岸输沙-横向输沙的季节性转变有关,海滩表层沉积物粒度也随之产生明显的联动变化。白城海滩在秋-冬-春-夏的季节时间尺度上,剖面坡度和沉积物粒径数值均呈现先下降后上升的变化趋势,海滩侵蚀强度大、沉积物粒径增加、滩面变陡,主要与沿岸输沙-横向输沙的季节性转变过程有关。研究结果对于深入理解砂泥复合型海滩动力地貌过程具有重要意义。

关键词：海洋地质学海滩剖面粒度特征季节性变化敏感粒度组分砂泥复合型海滩

基于“立德树人”理念的公安院校课程思政建设研究

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武警学院学报 2021年第6期37卷 85-88页

作者：孙青辉侯晓娜董艳磊薛鹏郑宏帅孟宪法中国人民警察大学河北廊坊065000

深入推进课程思政建设是公安院校坚持立德树人根本任务,全面加强思想政治教育与人才培养工作融合的重要途径,有利于合理整合思想政治教育资源,形成育人合力。在分析“立德树人”与“课程思政”逻辑关联的基础上,探索公安院校课程思政的... 详细信息

深入推进课程思政建设是公安院校坚持立德树人根本任务,全面加强思想政治教育与人才培养工作融合的重要途径,有利于合理整合思想政治教育资源,形成育人合力。在分析“立德树人”与“课程思政”逻辑关联的基础上,探索公安院校课程思政的核心要素,提出完善课程思政教学体系、提高政教学能力和水平、打造课程思政建设资源平台、健全课程思政建设质量评价和督导考核机制的建设路径。

关键词：公安院校课程思政立德树人

Morphodynamics of an Artificial Cobble Beach in Tianquan Bay, Xiamen, China

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Journal of Ocean University of China 2019年第4期18卷 868-882页

作者： SHU Fangfang CAI Feng QI hongshuai LIU Jianhui LEI Gang zheng Jixiang College of Marine Geosciences Ocean University of China Qingdao 266100 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China Island Research Center Ministry of Natural Resources Pingtan 350400 China

By tracking and monitoring the profile configuration, topography, and hydrodynamic factors of an artificial cobble beach in Tianquan Bay, Xiamen, China over three consecutive years after its completion, we analyzed the evolution of its profile configura- tion and plane morphology, and its storm response characteristics. The evolution of the profile configuration of the artificial cobble beach in Tianquan Bay can be divided into four stages. The beach was unstable during the initial stage after the beach nourishment the profile configuration changed obviously, and an upper concave composite cobble beach formed gradually, which was character- ized by a steep upper part and a gentle lower part. In the second stage, the cobble beach approached dynamic equilibrium with minor changes in the profile configuration. At the third stage the beach was in a high-energy state under the influence of Typhoon Meranti, and the response of the artificial cobble beach differed significantly from that of the low-tide terrace sandy beach. Within a short time, there was net onshore transport of cobbles in the cross-shore direction. The beach face was eroded, the beach berm was accumulated, and the slope of the beach was steepened considerably. In the alongshore direction, there was notable transport of cobbles on the beach from east to west along the shore, and the total volume of the beach decreased by 4.5×103 m 3, which accounted for 50% of the total amount of beach volume lost within three years. The fourth stage was the restoration stage after the typhoon, characterized by a little gentler profile slope and the increase in width and the decrease in height of beach berm. Because of the action of waves and the wave-driven longshore current caused by the specific terrain and landform conditions along the coast (e.g., coastal headlands, near-shore artificial structures, and reefs), the coastline of the artificial cobble beach gradually evolved from being essentially parallel to the artifi

关键词： beach nourishment cobble beach morphologic evolution erosion hotspot storm response

Using video imagery to reconstruct the 3D intertidal terrain along a beach with multiple cusps

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Acta Oceanologica Sinica 2023年第7期42卷 1-9页

作者： Feng Cai Hang Yin hongshuai Qi Jixiang zheng Yuwu Jiang Zhubin Cao Yanyu He Laboratory of Ocean and Coast Geology Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China College of Ocean and Earth Sciences Xiamen UniversityXiamen 361104China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

A high-frequency,high-resolution shore-based video monitoring system(VMS)was installed on a macrotidal(tidal amplitude>4 m)beach with multiple cusps along the Quanzhou coast,***,we propose a video imagery-based method that is coupled with waterline and water level observations to reconstruct the terrain of the intertidal zone over one tidal ***,the beach cusp system(BCS)was precisely processed and embedded into the digital elevation model(DEM)to more effectively express the microrelief and detailed characteristics of the intertidal *** a field experiment conducted in January 2022,the reconstructed DEM was deemed *** DEM was verified by RTK-GPS and had an average vertical root mean square error along corresponding RTK-GPS-derived intertidal profiles and corresponding BCS points of 0.134 m and 0.065 m,*** results suggest that VMSs are an effective tool for investigating coastal geomorphic processes.

关键词： intertidal terrain beach cusp video monitoring system waterline method feature embedment

High-yield red phosphorus sponge mediated robust lithium-sulfur battery

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Nano Research 2023年第6期16卷 8329-8337页

作者： zheng Luo Shusheng Tao Ye Tian Hanyu Tu Laiqiang Xu Wentao Deng Guoqiang Zou hongshuai Hou Xiaobo Ji State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China

Although lithium-sulfur(Li-S)batteries with high specific energy exhibit great potential for next-generation energy-storage systems,their practical applications are limited by the growth of Li dendrites and lithium polysulfides(LiPSs)***,a highly porous red phosphorus sponge(HPPS)with well distributed pore structure was efficiently prepared via a facile and largescale hydrothermal process for polysulfides adsorption and dendrite *** experimental demonstrated,the porous red phosphorus modified separator with increased active site greatly promotes the chemisorption of LiPSs to efficiently immobilize the active sulfur within the cathode section,while Li metal anode activated by Li_(3)P interlayer with abundant ionically conductive channels significantly eliminates the barrier for uniform Li^(+)permeation across the interlayer,contributing to the enhanced stability for both S cathode and Li *** by the HPPS,long-term stability of 1,200 h with minor voltage hysteresis is achieved in symmetric cells with Li_(3)P@Li electrode while Li-S half-cell based on HPPS modified separator delivers an outperformed reversibility of 783.0 mAh·g^(−1)after 300 cycles as well as high-rate performance of 694.5 mAh·g^(−1)at 3 C,which further boosts the HPPS tuned full cells in practical S loading(3 mg·cm^(−2))and thin Li3P@Li electrode(100μm)with a capacity retention of 71.8%after 200 cycles at 0.5 *** work provides a cost-effective and metal free mediator for simultaneously alleviating the fundamental issues of both S cathode and Li anode towards high energy density and long cycle life Li-S full batteries.

关键词： lithium-sulfur battery red phosphorus sponge separator chemical adsorption Li dendrite

Recent advances of composite electrolytes for solid-state Li batteries

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Journal of Energy Chemistry 2022年第4期31卷 524-548页

作者： Laiqiang Xu Jiayang Li Honglei Shuai zheng Luo Baowei Wang Susu Fang Guoqiang Zou hongshuai Hou Hongjian Peng Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083HunanChina

All-solid-state lithium batteries(ASSLBs)are recognized as high energy density batteries system without safety issues within the next generation of *** development of solid electrolytes is the crucial step of *** composite electrolyte has stable physical and electrochemical characteristics,and its comprehensive performance surpasses the individual solid electrolyte,bringing unique vitality to the solid ***,their intrinsic weakness limits the development of composite *** this review,we provide a comprehensive and in-depth understanding of the challenges and opportunities of composite electrolytes,with special focus on mechanisms of ion transport,nanostructure design towards high ionic conductivity,interfacial issues within electrolytes and ***,future development is prospected,which can shed light on researchers in this field and accelerate the industrial production of composite electrolytes.

关键词： High energy density Composite electrolytes Ion transport High ionic conductivity Interfacial issues

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基于后量子密码算法的安全SoC芯片设计

集成电路与嵌入式系统 2024年第9期24卷 36-41页

作者：张跃军魏红帅汪玚郑韦芳张会红宁波大学信息科学与工程学院宁波315211

后量子密码算法已经成为当前安全领域的研究热点。本文通过对NIST后量子密码算法竞赛候选的Saber算法进行研究,提出一种基于后量子密码算法的安全SoC芯片设计方案。该方案首先分析算法的硬件架构,优化矩阵运算和数值拼接等操作提升硬件... 详细信息

后量子密码算法已经成为当前安全领域的研究热点。本文通过对NIST后量子密码算法竞赛候选的Saber算法进行研究,提出一种基于后量子密码算法的安全SoC芯片设计方案。该方案首先分析算法的硬件架构,优化矩阵运算和数值拼接等操作提升硬件效率,采用二次验证方式加强算法解密过程的安全性;然后,设计Hash随机数拓展生成模块、加解密模块和数据存储器以及随机数种子生成器,完成Saber算法的硬件IP核;其次,在RISC V处理器、总线和接口电路的基础上,结合时钟门控技术降低功耗,设计基于后量子密码算法的安全SoC芯片。实验结果表明,所设计的安全SoC芯片面积为2.6 mm^(2),等效逻辑门数为90k,芯片内核面积占比为75.2%,PAD面积占比为24.8%,芯片功耗为9.467 mW。

关键词：后量子算法密码算法安全SoC 硬件安全

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