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Polypyride intercalation boosting the kinetics and stability of V_(3)O_(7)·H_(2)O cathodes for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 361-370,I0007页

作者： Qingqing He Jie Bai Mengda Xue Yanxin Liao huayu wang Mujun Long Lingyun Chen Department of Applied Chemistry School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 41331China Laboratoryof Materials and Metallurgy Cllege of Materials Science and EngineeringChongqing UniversityChongqing 400044Chin

V_(3)O_(7)·H_(2)O(VO)is a high capacity cathode material in the field of aqueous zinc ion batteries(AZIBs),but it is limited by slow ion migration and low electrical *** this paper,polypyridine(PPyd)intercalated VO with nanoribbon structure was prepared by a simple in-situ pre-intercalation,which is noted *** total density of states(TDOS)shows that after the pre-intercalation of PPyd,an intermediate energy level appears between the valence band and conduction band,which provides a step that can effectively reduce the band gap and enhance the electron ***,the density functional theory(DFT)results found that Zn^(2+)is more easily de-intercalated from the V-O skeleton,which proves that the embeddedness of PPyd improves the diffusion kinetics of Zn^(2+).Electrochemical studies have shown that VO-PPyd cathode materials exhibit excellent rate performance(high specific capacity of 465 and 192 mA h g^(-1)at 0.2 and 10 A g^(-1),respectively)and long-term cycling performance(92.7%capacity retention rate after 5300 cycles),due to their advantages in structure and *** importantly,the energy density of VO-PPyd//Zn at 581 and 5806 W kg^(-1)is 375 and 247 W h kg^(-1),***-PPyd exhibits excellent electrochemical properties compared to previously reported vanadium based cathodes,which makes it highly competitive in the field of high-performance cathode materials of AZIBs.

关键词： V_(3)O_(7)·H_(2)O Polypyridine Ion migration Electrical conductivity Aqueous zinc ion batteries DFT calculation

Effect of High Temperature Curing on the Frost Resistance of Recycled Aggregate Concrete and the Physical Properties of Second-Generation Recycled Coarse Aggregate under Freeze-Thaw Cycles

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Journal of Renewable Materials 2023年第6期11卷 2953-2967页

作者： Xintong Chen Pinghua Zhu Xiancui Yan Lei Yang huayu wang Changzhou City Key Laboratory of Building Energy-Saving Technology Department of Civil EngineeringChangzhou UniversityChangzhou213164China

With the emphasis on environmental issues,the recycling of waste concrete,even recycled concrete,has become a hot spot in the field of *** the repeated recycling of waste concrete used in harsh environments is still a complex *** paper discusses the durability and recyclability of recycled aggregate concrete(RAC)as a prefabricated material in the harsh environment,the effect of high-temperature curing(60℃,80℃,and 100℃)on the frost resistance of RAC and physical properties of the second generation recycled coarse aggregate(RCA_(2))of RAC after 300 freeze-thaw cycles were *** frost resistance of RAC was characterized by compressive strength,relative dynamic elastic modulus,and mass *** the physical properties of RCA_(2),the apparent density,water absorption,and crushing value were *** the SEM images of RAC after 300 freeze-thaw cycles were *** results indicated that the frost resistance of RAC cured at 80℃ for 7 days was comparable to that cured in the standard condition(cured for 28 days at 20℃±2℃ and 95%humidity),and the RAC cured at 100℃ was slightly ***,the frost resistance of RAC cured at 60℃ deteriorated *** RAC cured at 80℃ for 7 days is the *** after the freeze-thaw cycle or not,the RCA that curd at 60℃,80℃,and 100℃ for 7 days can also meet the requirements of Grade III RCA and be used as the aggregate of non-bearing part of prefabricated concrete ***_(2) which is cured at 80℃ for 7 days had the best physical properties.

关键词： Freeze-thaw cycles curing condition recycled aggregate concrete second-generation recycled coarse aggregate

Two-dimensional porous zinc cobalt sulfide nanosheet arrays with superior electrochemical performance for supercapatteries

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Journal of Materials Science & Technology 2021年第30期89卷 199-208页

作者： Yang Li Ziyang Luo Shunfei Liang Huizhen Qin Xun Zhao Lingyun Chen huayu wang Shaowei Chen School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Department of Chemistry and Biochemistry University of CaliforniaSanta CruzCalifornia 95060United States

Unique two-dimensional(2D)porous nanosheets with overwhelmingly rich channels and large specific surface area exhibit superior electrochemical capacitance performance,as compared to the conventional zero-and one-dimensional *** ternary transition metal sulfides(TMSs)are well recognized for their high electrochemical activity and capacity,and the replacement of oxygen with sulfur may result in high stability and flexible properties of the nanomaterials,as compared to transition metal oxides,herein we report the synthesis of 2D porous nanosheet arrays of Zn_(x)Co_(1-x)S(x=0,0.25,0.5,0.75,and 1)via a facile hydrothermal *** to the synergistic effect of the metal components and a unique 2D porous structure,the Zn_(0.5)Co_(0.5)S electrode was found to stand out as the best among the series,with a high specific capacity of 614 C g^(-1)at 1 A g^(-1)and excellent cycle retention rate of 90%over 10,000 cycles at 10 A g^(-1).Notably,a supercapattery based on a Zn_(0.5)Co_(0.5)S positive electrode and an activated carbon(AC)negative electrode(Zn_(0.5)Co_(0.5)S//AC)was found to display a 1.6 V voltage window,a 61 mA h g^(-1)specific capacity at 1 A g^(-1),a 49 Wh kg^(-1)energy density at 957 W kg^(-1)power density,and excellent cycling performance(88%over 10,000 cycles),suggesting tremendous potential of Zn_(0.5)Co_(0.5)S in the development of high-performance supercapattery devices.

关键词： Two-dimensional materials Porous nanosheet Zinc cobalt sulfide Supercapattery Electrochemical energy storage

Probing component contributions and internal polarization in silicon-graphite composite anode for lithium-ion batteries with an electrochemical-mechanical model

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Chinese Physics B 2022年第7期31卷 595-605页

作者： Yue Chen Fuliang Guo Lufeng Yang Jiaze Lu Danna Liu huayu wang Jieyun Zheng Xiqian Yu Hong Li Beijing Advanced Innovation Center for Materials Genome Engineering Key Laboratory for Renewable EnergyBeijing Key Laboratory for New Energy Materials and DevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing WeLion New Energy Technology Co. Ltd.Beijing 100176China Li Auto Inc. Beijing 101399China Tianmu Lake Institute of Advanced Energy Storage Technologies Liyang 213300China

Silicon–graphite(Si–Gr)composite anodes are attractive alternatives to replace Gr anodes for lithium-ion batteries(LIBs)owing to their relatively high capacity and mild volume ***,it is difficult to understand electrochemical interactions of Si and Gr in Si–Gr composite anodes and internal polarization of LIBs with regular experiment ***,we establish an electrochemical-mechanical coupled model to study the effect of rate and Si content on the electrochemical and stress behavior in a Si–Gr composite *** results show that the composites of Si and Gr not only improve the lithiation kinetics of Gr but also alleviate the voltage hysteresis of Si and decrease the risk of lithium plating in the negative ***'s more,the Si content is a tradeoff between electrode capacity and electrode volume ***,various internal polarization contributions of cells using Si–Gr composite anodes are quantified by the voltage decomposition *** results indicate that the electrochemical polarization of electrode materials and the electrolyte ohmic over-potential are dominant factors in the rate performance of cells,which provides theoretical guidance for improving the rate performance of LIBs using Si–Gr composite anodes.

关键词： Si–Gr electrochemical interactions polarization rate performance

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北宋绍圣“逆案”新考

历史研究 2024年第6期 173-187,M0007页

作者：王化雨四川师范大学历史文化与旅游学院

北宋哲宗绍圣四年(1097),朝中接连出现司马光案、刘唐老案、同文馆狱三起涉及神哲之际皇位嬉递的“逆案”。论者认为,在这三起“逆案”之中,贯穿着新法派为彻底铲除旧法派而策划的政治阴谋,“逆案”所造成的最主要后果,是激化了新旧矛盾。

关键词：刘唐同文馆司马光逆案三起宋哲宗新旧矛盾

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宋朝的君臣夜对

四川大学学报（哲学社会科学版） 2010年第3期 52-61页

作者：王化雨四川大学历史文化学院四川成都610064

夜对,指的是宋代君主在夜间于宫城中,召见某些文臣,与自己讨论各方面事务的活动。夜对是一个十分特殊的君臣交流场合,君臣双方都利用夜对来实现自己的意图。透过夜对,我们可以对宋代皇权政治形成更全面深入的认识。

关键词：宋朝夜对君臣交流皇权政治

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化解新时代社会主要矛盾的财税法思维

法学杂志 2018年第3期39卷 51-58页

作者：王桦宇上海交通大学凯原法学院上海200030

新时代社会主要矛盾发生变化,是以人民为中心的发展思想对我国社会主要矛盾作出的新判断和新表述。财税法作为治国安邦之法,与共同富裕目标衔接紧密,是让改革发展成果更公平惠及全体人民的重要法律领域。财税法通过调整和规范政府间财... 详细信息

新时代社会主要矛盾发生变化,是以人民为中心的发展思想对我国社会主要矛盾作出的新判断和新表述。财税法作为治国安邦之法,与共同富裕目标衔接紧密,是让改革发展成果更公平惠及全体人民的重要法律领域。财税法通过调整和规范政府间财政关系、政府预算和税收制度,回应和化解新时代社会主要矛盾,为加快建立现代财政制度提供道路支撑。新时代财税法思维包括三个方面:一是立足现代化建设和改革发展,提高政府治理能力、法治思维能力并依法拓展财源,建设现代化经济体系;二是渐进推动民主、促进民生福祉,满足人民美好生活需要,建构预算规范、财力协调和区域均衡的财税体制;三是实现分配正义,通过区域、产业和群体之间的财税制度设计和规则安排,促进发展更加平衡更加充分。借助财税法思维化解新时代社会主要矛盾有利于加快国家治理现代化和迈向全面小康的步伐。

关键词：新时代社会主要矛盾现代财政制度依法治国财税法思维

论现代财政制度的法治逻辑——以面向社会公平的分配正义为中心

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法学论坛 2014年第3期29卷 40-49页

作者：王桦宇北京大学法学院北京100871

财政是国家治理的基础和重要支柱,科学的财税体制是实现国家长治久安的制度保障。现代财政制度的建立是财税体制改革和收入分配制度改革的突破口和着力点,其重点在于建立结构优化、社会公平的财税制度,并确保其法治化运行。在理念阐释上... 详细信息

财政是国家治理的基础和重要支柱,科学的财税体制是实现国家长治久安的制度保障。现代财政制度的建立是财税体制改革和收入分配制度改革的突破口和着力点,其重点在于建立结构优化、社会公平的财税制度,并确保其法治化运行。在理念阐释上,包括权利公平、机会公平、规则公平在内的社会公平是现代财政制度的逻辑起点;在目标设定上,现代财政制度对初次分配、再分配和三次分配分别有着不同的秩序诉求;在制度设计上,民生财政、均衡税制和正当程序构成了现代财政制度的基础性要素。当前,中国现代财政制度建立应以预算体制改革及其法治化为契机,构建面向社会公平的财税结构和规则安排,以实现法治框架下的分配正义。

关键词：现代财政制度法治逻辑社会公平分配正义

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领域法学研究的三个核心问题

法学论坛 2018年第4期33卷 107-115页

作者：王桦宇上海交通大学凯原法学院上海200030

自法学界开始提出领域法学的研究方法论以来,关于领域法学的探讨和争鸣愈加热烈。在这其中,有三个核心问题非常重要。第一个问题,领域法学是什么?领域法学是针对综合法律现象进行"类型化"研究的方法论,不是独立学科论,也并非弱化部门法... 详细信息

自法学界开始提出领域法学的研究方法论以来,关于领域法学的探讨和争鸣愈加热烈。在这其中,有三个核心问题非常重要。第一个问题,领域法学是什么?领域法学是针对综合法律现象进行"类型化"研究的方法论,不是独立学科论,也并非弱化部门法还是超越部门法论。第二个问题,领域法学为什么?领域法学在功能面向上"双轮驱动",在理论上顺应法学研究现代化和方法创新的需求,在实践上为深化改革和推动法治建设解决具体命题。第三个问题,领域法学做什么?领域法学并不主张"泛领域化"的法学研究,认为需要在国家改革发展的前瞻和重点领域进行"有的放矢",供给包括立法、执法和司法在内的理论资源和智识支撑。领域法学是一种立基于"问题意识"的研究方法,是新时期推动中国法学理论研究和法治建设事业的思维创新和重要力量。

关键词：法律现象领域法学部门法学财税法学研究范式