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Energy & Environmental Materials 2024年第3期7卷 72-83页

作者： Sheng Liu Chaozhu Shu Yu Yan dayue du Longfei Ren Ting Zeng Xiaojuan Wen Haoyang Xu Xinxiang Wang Guilei Tian Ying Zeng College of Materials and Chemistry&Chemical Engineering Chengdu University of Technology1#DongsanluErxianqiaoChengdu 610059China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Polymer Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610065China

The interfacial chemistry of solid electrolyte interphases(SEI)on lithium(Li)electrode is directly determined by the structural chemistry of the electric double layer(EDL)at the ***,a strategy for regulating the structural chemistry of EDL via the introduction of intermolecular hydrogen bonds has been proposed(p-hydroxybenzoic acid(pHA)is selected as proof-of-concept).According to the molecular dynamics(MD)simulation and density functional theory(DFT)calculation results,the existence of hydrogen bonds realizes the anion structural rearrangement in the EDL,reduces the lowest unoccupied molecular orbital(LUMO)energy level of anions in the EDL,and the number of free solvent molecules,which promotes the formation of inorganic species-enriched SEI and eventually achieves the dendrite-free Li *** on this strategy,Li‖Cu cells can stably run over 185 cycles with an accumulated active Li loss of only 2.27 mAh cm^(-2),and the long-term cycle stability of Li‖Li cells is increased to 1200 *** addition,the full cell pairing with the commercial LiFePO_(4)(LFP)cathodes exhibits stable cycling performance at 1C,with a capacity retention close to 90%after 200 cycles.

关键词： electric double layer electrolyte additives intermolecular hydrogen bonds Li metal batteries p-Hydroxybenzoic acid

Long-cycling lithium-oxygen batteries enabled by tailoring Li nucleation and deposition via lithiophilic oxygen vacancy in Vo-TiO_(2)/Ti_(3)C_(2)Tx composite anodes

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Journal of Energy Chemistry 2022年第2期31卷 654-665页

作者： Yu Yan Chaozhu Shu Ruixin Zheng Minglu Li Zhiqun Ran Miao He Longfei Ren dayue du Ying Zeng College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059SichuanChina

Uncontrollable Li dendrite growth and infinite volume fluctuation during durative plating and stripping process gravely hinder the application of metallic Li electrode in lithium-oxygen ***,oxygen vacancy-rich TiO_(2)(Vo-TiO_(2))nanoparticles(NPs)uniformly dispersing on Ti_(3)C_(2)T_(x)(Vo-TiO_(2)/Ti_(3)C_(2) T_(x))with excellent lithiophilicity feature are presented as effective composite anodes,on which a dense and uniform Li growth behavior is *** on electrochemical studies,mutiphysics simulation and theoretical calculation,it is found that Vo-TiO_(2) coupling with three dimensional(3 D)conductive Ti_(3)C_(2) T_(x) MXene forms highly ordered lithiophilic sites which succeed in guiding Li ions flux and adsorption,thus modulating the uniform Li nucleation and *** a result,this composite electrode is capable of preserving Li with high areal capacity of~10 mAh cm^(-2) without the presence of dendrites and large volume ***,the as-prepared Vo-TiO_(2)/Ti_(3)C_(2) T_(x)@Li anode shows outstanding performance including low voltage hysteresis(~19 mV)and superior durability(over 750 h).When assembling with the Vo-TiO_(2)/Ti_(3)C_(2) T_(x)@Li anodes,lithium-oxygen batteries also deliver enhanced cycling stability and improved rate *** work demonstrates the effectiveness of oxygen vacancies in guiding Li nucleating and plating behavior at initial stage and brings a promising strategy for promoting the development of advanced Li metal-based batteries.

关键词： Lithium-oxygen batteries Electrode materials Vo-TiO_(2)/Ti_(3)C_(2)Tx composite Oxygen vacancies Adsorption energy

Cationic vanadium vacancy-enriched V_(2−x)O_(5)on V_(2)C MXene as superior bifunctional electrocatalysts for Li-O_(2) batteries

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Science China Materials 2022年第7期65卷 1761-1770页

作者： Haoyang Xu Ruixin Zheng dayue du Longfei Ren Runjing Li Xiaojuan Wen Chuan Zhao Ting Zeng Bo Zhou Chaozhu Shu College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China

The development of cationic vacancies has been extensively examined as an effective strategy to improve the activity of ***,it is a challenge to effectively introduce cationic vacancies on the material *** specific effects on the electrochemical performance of lithium-oxygen(Li-O_(2))batteries are rarely *** this work,vanadium pentoxide with abundant vanadium vacancies(V_(2-x)O_(5))is in situ prepared on the V_(2)C MXene(V_(2-x)O_(5)@V_(2)C MXene)surface,and their bifunctional catalytic activity toward the oxygen electrode reaction in Li-O_(2)batteries is systematically *** results show that the V_(2-x)O_(5)@V_(2)C MXene-based Li-O_(2)battery exhibits excellent *** delivers a high energy efficiency of 83.4%at 100 mA g^(-1) and excellent cycling performance of more than 500 ***,density functional theory calculations confirm that the presence of cationic vanadium vacancies can provide abundant active sites to reduce the reaction barrier and optimize the adsorption of reactants,increasing the oxygen electrode reactions in the Li-O_(2)*** work provides a meaningful view that modulating the electronic structure by creating cationic metal vacancies can improve the electrocatalytic activity of transition metal oxides.

关键词： Li-O_(2)batteries oxygen electrode electrocatalyst transition metal oxide vanadium vacancy

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周原甲骨释字三则

考古与文物 2024年第6期 119-122页

作者：刘大月吉林大学考古学院古籍研究所

周原甲骨在历史学和文字学上均有重要价值。其文字多已释出,不过,有三个字为过去所误解。经过考证,周原甲骨H11:28中的“”字左从玉,右从“柲”之初文,左上一笔为饰笔,可释为“珌”,读作“玭”,表珠玉,用来祭祀。H11:41中的“■”字即... 详细信息

周原甲骨在历史学和文字学上均有重要价值。其文字多已释出,不过,有三个字为过去所误解。经过考证,周原甲骨H11:28中的“”字左从玉,右从“柲”之初文,左上一笔为饰笔,可释为“珌”,读作“玭”,表珠玉,用来祭祀。H11:41中的“■”字即《说文》的“[列马]”字。H11:87中的“■”字从鼎異声,读作“[钅弋]”,是鼎的一种。

关键词：周原甲骨珌 [列马] [钅弋]

具有可调界面电子结构的金属硫化物异质结构作为锂-氧气电池的高效催化剂

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Science China Materials 2023年第4期66卷 1341-1351页

作者：田桂雷任龙飞徐浩洋曾婷王鑫翔温晓娟杜大越严羽刘盛舒朝 College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China

设计和制备具有优异稳定性和高活性的催化剂对于提高锂-氧气电池的性能至关重要.由于其可调节的结构及促进氧还原反应和析氧反应动力学的有效性,异质结构催化剂引起了广泛的研究兴趣.在这项工作中,CuCo_(2)S_(4)/CoS_(1.097)多元金属硫... 详细信息

设计和制备具有优异稳定性和高活性的催化剂对于提高锂-氧气电池的性能至关重要.由于其可调节的结构及促进氧还原反应和析氧反应动力学的有效性,异质结构催化剂引起了广泛的研究兴趣.在这项工作中,CuCo_(2)S_(4)/CoS_(1.097)多元金属硫化物被证明是锂-氧气电池氧电极反应的有效电催化剂.密度泛函理论计算表明,CuCo_(2)S_(4)/CoS_(1.097)的电子结构在异相界面处受到调控,有利于优化氧电极反应过程中间体的吸附,最终加速氧电极反应动力学.实验结果表明,基于CuCo_(2)S_(4)/CoS_(1.097)的锂-氧气电池在100 m A g^(-1)下具有26,727.8 m A h g^(-1)的高比容量和超过267次循环的出色耐久性.该工作为锂-氧气电池高性能正极材料的设计和构造提供了新视角.

关键词：氧还原反应氧电极电催化剂正极材料异质结构密度泛函理论计算金属硫化物高比容量

加氢抽提装置机泵机械密封冷却器泄漏分析及处理

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山东化工 2024年第17期53卷 206-208页

作者：胡大月中海石油宁波大榭石化有限公司

介绍了机泵集装式机械密封系统中机械密封、冲洗方式及冷却器结构，加氢抽提装置中高温热油泵集装式机械密封系统中冷却器盘管泄漏的情况，通过腐蚀机理、腐蚀类型、影响盘管腐蚀因素等方面分析了高温热油泵冷却器盘管泄漏的原因，并列... 详细信息

介绍了机泵集装式机械密封系统中机械密封、冲洗方式及冷却器结构，加氢抽提装置中高温热油泵集装式机械密封系统中冷却器盘管泄漏的情况，通过腐蚀机理、腐蚀类型、影响盘管腐蚀因素等方面分析了高温热油泵冷却器盘管泄漏的原因，并列举了冷却器盘管材质升级，由304奥氏体不锈钢改为2205双向钢、将循环水改为除盐水、冷却器盘管出厂前进行热处理、定期将冷却器进行反冲洗预防盘管发生泄漏的措施及实施后的效果。

关键词：集装式机械密封冷却器盘管应力腐蚀泄漏奥氏体不锈钢

鹰咀石电站进水口回旋式清污机械平台优化改造

同方期刊数据库博看期刊评论

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云南水力发电 2024年第4期40卷 180-183页

作者：蒋大粤韶关市利源工程建设有限公司广东韶关512000

鹰咀石电站运行期间由于污物聚集在拦污栅前造成过流减小,严重影响机组出力,严重时会压垮拦污栅,造成生产事故,威胁机组安全。人工清污费时费力,易引发落水事故,清污不及时还会影响经济效益,因此对进水口回旋式清污机平台进行了优化改... 详细信息

鹰咀石电站运行期间由于污物聚集在拦污栅前造成过流减小,严重影响机组出力,严重时会压垮拦污栅,造成生产事故,威胁机组安全。人工清污费时费力,易引发落水事故,清污不及时还会影响经济效益,因此对进水口回旋式清污机平台进行了优化改造。工作台桥紧邻厂房布置,通过复核计算,得到清污机工作台满足水库大坝的防洪安全要求;对清污机工作台进行稳定分析计算,清污机工作台不均匀系数及抗滑稳定安全系数均满足规范要求。

关键词：引水电站回旋式清污机优化改造工作台

南雄农业电灌站集群复核重建规划整治提升实践

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云南水力发电 2024年第3期40卷 171-174页

作者：蒋大粤韶关市利源工程建设有限公司广东韶关512000

提高水利工程的发展速度,为农业产业结构的调整和农民增收起到了重要的支持和保障作用。需要积极开展电灌站的改造维护工作,及时调整电灌站的规划,更新机电设备。以南雄市农业电灌站集群重建工程为背景,针对目前面对的工程现状进行分析... 详细信息

提高水利工程的发展速度,为农业产业结构的调整和农民增收起到了重要的支持和保障作用。需要积极开展电灌站的改造维护工作,及时调整电灌站的规划,更新机电设备。以南雄市农业电灌站集群重建工程为背景,针对目前面对的工程现状进行分析,提出了规划整治提升设计方案,包括灌溉设计流量、扬程设计等,并采取了相应的工程布置措施。由于施工期产生的噪声、粉尘等将对周围环境造成的影响,通过一定的工程措施和环境治理措施进行防治。既满足了电灌站的功能性要求,又将施工期间对环境的影响控制在可控范围内,对促进南雄市经济的高速发展发挥巨大作用,社会经济效益显著。

关键词：农业电灌站整治提升扬尘设计机电设备

Voter model in a random environment in Zd

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Frontiers of Mathematics in China 2012年第5期7卷 895-905页

作者： Zhichao SHAN dayue CHEN School of Mathematical Sciences Peking University Beijing 100871 China Center for Statistical Science Peking University Beijing 100871 China

We consider the voter model with flip rates determined by {ue, e ∈ Ed}, where Ed is the set of all non-oriented nearest-neighbour edges in the Euclidean lattice Zd. Suppose that {ue, e ∈ Ed} are independent and identically distributed （i.i.d.） random variables satisfying ue ≥ 1. We prove that when d = 2, almost surely for all random environments, the voter model has only two extremal invariant measures： δ0 and δ1.

关键词： Voter model random walk random environment duality

风热感冒临床表型组及药物表型组的构建与表型组学研究

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中药药理与临床 2024年第1期40卷 103-106页

作者：刘子渝高晨皓叶玲玉段大跃西南医科大学附属中医医院泸州646099 西南医科大学中医药表型组学研究中心泸州646000

随着中医药现代化的深入发展,新兴科学表型组学(Phenomics)已成为传统中医药融合现代医学的新研究范式。本文提出以中医证候为框架,结合现代医学对证候相关临床表型特征的共识,构建风热感冒临床表型组,并根据方证相应原则,建立大型“病... 详细信息

随着中医药现代化的深入发展,新兴科学表型组学(Phenomics)已成为传统中医药融合现代医学的新研究范式。本文提出以中医证候为框架,结合现代医学对证候相关临床表型特征的共识,构建风热感冒临床表型组,并根据方证相应原则,建立大型“病证方”相结合的风热感冒临床表型组及银翘散药物表型组队列,进行多组学集合的表型组学研究的理论和方法。为中医证候的量化诊断和治疗以及临床疗效评价提供客观科学依据,最终实现风热感冒的精准防治。

关键词：银翘散风热感冒表型组学中医药代谢组学精准医学