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Synergistic Co-doping effect of CNTs and PvP in Na_(4)MnCr(PO_(4))3 cathode as a strategy for improving the electrochemical performance of SIBs

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Chinese Chemical Letters 2024年第2期35卷 539-543页

作者： Ruoyu Chen Denys S.Butenko Shilin li Xinyu Zhang guangshe li.igor v.zatovsky Wei Han College of Physics State Key Laboratory of Inorganic Synthesis and Preparative ChemistryInternational Center of Future ScienceJilin UniversityChangchun 130012China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China F.D.Ovcharenko Institute of Biocolloidal Chemistry NAS UkraineKyiv 03142Ukraine

In order to solve the contradiction between the rapidly growing energy demand and the excessive exploitation of fossil fuels,it is urgent to research and develops more environmentally friendly and efficient energy storage ***,the development of high-performance cathode materials to enhance the energy density of SIB is currently one of the most important topics of scientific *** high-voltage and low-cost cathode material for SIBs,a composite of carbon-coated Na_(4)MnCr(PO_(4))_(3)(NASICON-type),polyvinylpyrrolidone(PvP),and modified carbon nanotubes(CNTs)is prepared by sol-gel and freeze-drying *** to the high conductivity of CNTs,the conductivity of the composite is significantly improved,and its initial capacity is increased to 114 mAh/g at 0.5 C and 96 mAh/g at 5 C(Mn^(2+)/Mn^(4+)conversion for voltage windows 1.4-4.3 v).Moreover,the multi-electrons transfer of Cr^(3+)/Cr^(4+) and Mn^(2+)/Mn^(4+) can provide a high capacity of 165 mAh/g at 0.1 C and 102 mAh/g at 5 C in the high voltage window of 1.4-4.6 ***,PvP can effectively inhibit the Jahn-Teller effect caused by Mn ion,making the composite have more excellent high-rate performance and *** addition,GITT,EIS and Cv curves were drawn to better reveal the excellent kinetic properties of Na_(4)MnCr(PO_(4))_(3)@C@PvP@CNT cathode,and the mechanism of its performance improvement is deeply studied and ***,the co-doping of CNTs and PvP is a simple way to high conductivity and fast charging of cathode materials for SIBs.

关键词： Sodium-ion batteries Na_(4)MnCr(PO_(4))_(3) Carbon nanotubes Polyvinylpyrrolidone Synergistic effect

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Hybrid bimetallic cluster ZrO2/Rh@N,S co-doped porous carbon nanosheets for efficient hydrogen evolution in acid electrolytes

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Tungsten 2024年第4期6卷 657-662页

作者： Xin-Yi Zhang igor v.zatovsky Jun-Ming Cao Xing-Long Wu Faculty of Chemistry Northeast Normal University F.D.Ovcharenko Institute of Biocolloidal Chemistry NAS Ukraine MOE Key Laboratory for Uv light-Emitting Materials and Technology Northeast Normal University

Acid hydrogen evolution reaction (HER) is a critical energy conversion process,which is significantly important in hydrogen energy manufacturing and storage [1].Although the performance of noble metal platinum (Pt)-based catalysts in acidic HER is well known,the challenges are high cost,limited reserves,poor stability,and susceptibility to toxic substances [2].Therefore,it is urgent to design and manufacture acidic HER catalysts with high reactivity,high stability,and low cost.

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熵增工程在电催化反应中的研究进展

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物理化学学报 2024年第7期40卷 36-42页

作者：张新义任楷刘妍宁谷振一黄志雄郑硕航王晓彤郭晋芝 igor v.zatovsky 曹峻鸣吴兴隆东北师范大学化学学院长春130024 东北师范大学紫外光发光材料与技术教育部重点实验室长春130024 乌克兰国家科学院生物胶体化学研究所乌克兰基辅03142

目前对高性能与高稳定性的电催化剂进行精准合成仍然是亟待解决的问题。熵作为是最重要的热力学参数之一,是描述体系无序程度的物理量,其数值主要由材料的结构、磁矩、原子和电子振动共同决定。根据体系的构型熵值,我们通常将材料分为... 详细信息

目前对高性能与高稳定性的电催化剂进行精准合成仍然是亟待解决的问题。熵作为是最重要的热力学参数之一,是描述体系无序程度的物理量,其数值主要由材料的结构、磁矩、原子和电子振动共同决定。根据体系的构型熵值,我们通常将材料分为低熵材料(ΔS_(mix)1.5R)。随着熵值的增加,材料本征的物理与化学性质也会随之发生相应的变化。得益于不同金属元素的共存,在界面处原子级的多组分排列,所产生的协同性高熵效应能够有效地提升电催化反应的活性,因此在电催化领域中得到了广泛的研究关注。本综述对高熵电催化剂的基本概念、合成路线(“自上而下”与“自下而上”)以及在不同电催化反应类型中的高熵材料结构与性能之间的构效关系进行了系统总结,主要包括析氢(HER)、析氧(OER)、氧还原(ORR)、醇氧化(AOR)、氮还原(NRR)和二氧化碳还原反应(CO_(2)RR)等,从而阐明熵增工程对高性能电催化剂设计与应用的优势与潜力。同时,针对目前高熵催化剂研究所面临的主要问题与挑战,对未来基于熵增工程的高熵电催化剂的设计思路与合成方法进行展望。

关键词：熵增合成电化学高熵催化剂电催化

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Partial surface phase transformation of li_(3)vO_(4) that enables superior rate performance and fast lithium-ion storage

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Tungsten 2019年第4期1卷 276-286页

作者： Xiaoqing liu liping li guangshe li State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

li_(3)vO_(4) is a promising electrode material for next-generation lithium-ion batteries(liBs)due to its excellent specific capac-ity(592 mAh g^(−1)),suitable discharge voltage(0.5-1.0 v),and moderate volume change upon charge/discharge,while it still suffers from low electronic conductivity that usually gives a poor rate capability,low initial coulombic efficiency,and large polarization,imposing a challenge on its practical *** this work,a partial surface phase transformation of li_(3)vO_(4) was initiated via a freeze-drying method followed by a heat treatment in inert *** this method,li_(3)vO_(4) was integrated with a conductive layer livO_(2) and carbon *** synergistic effect among li_(3)vO_(4),livO_(2) layer,and carbon matrix was systematically studied by optimizing the treatment *** treated at 600°C in Ar,li_(3)vO_(4)-based composite delivered outstanding electrochemical properties,as expressed by a specific capacity(689 mAh g^(−1) at 0.1 A g^(−1) after 100 cycles),rate performance(i.e.,448 mAh g^(−1) at 2 A g^(−1)),and longtime cycle stability(523 mAh g^(−1) after 200 cycles at 0.2 A g^(−1)),which are superior to those without livO_(2) conductive layer when treated at the same temperature in *** findings reported in this work may offer novel hints of preparing more advanced anodes and promote the applications of vanadate materials such as li_(3)vO_(4) for next-generation lithium-ion batteries.

关键词： li_(3)vO_(4) livO_(2) Rate performance Electronic conductivity li^(+)diffusion

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A facile finger-paint physical modification for bilateral electrode/electrolyte interface towards a stable aqueous Zn battery

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Journal of Energy Chemistry 2023年第6期81卷 101-109,I0004页

作者： Hang Yang Duo Chen Yicheng Tan Hao Xu li li Yiming Zhang Chenglin Miao guangshe li Wei Han College of Physics the State Key Laboratory of Inorganic Synthesis and Preparative ChemistryInternational Center of Future ScienceJilin UniversityChangchun 130012JilinChina Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuChina State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina

Since the electrode/electrolyte interface(EEI)is the main redox center of electrochemical processes,proper manipulation of the EEI microenvironment is crucial to stabilize interfacial ***,a finger-paint method is proposed to enable quick physical modification of glass-fiber separator without complicated chemical technology to modulate EEI of bilateral electrodes for aqueous zinc-ion batteries(ZIBs).An elaborate biochar derived from Aspergillus Niger is exploited as the modification agent of EEI,in which the multi-functional groups assist to accelerate Zn^(2+)desolvation and create a hydrophobic environment to homogenize the deposition behavior of Zn ***,the finger-paint interface on separator can effectively protect cathodes from abnormal capacity fluctuation and/or rapid attenuation induced by H_(2)O molecular on the interface,which is demonstrated in modified MnO_(2),v_(2)O_(5),and KMn HCF-based *** as-proposed finger-paint method opens a new idea of bilateral interface engineering to facilitate the access to the practical application of the stable zinc electrochemistry.

关键词： Aqueous Zinc battery Electrode/electrolyte interface Interface modification MnO_(2) v_(2)O_(5) KMnHCF

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Nitrogen/sulphur dual-doped hierarchical carbonaceous fibers boosting potassium-ion storage

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Journal of Energy Chemistry 2021年第4期30卷 420-427页

作者： Junzhi li Junming Cao Xifei li Junhua Hu Yaohui Zhang Hirbod Maleki Kheimeh Sari Chunxiao Lv igorvzatovsky Wei Han Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology College of PhysicsJilin UniversityChangchun 130012JilinChina Xi'an Key Laboratory of New Energy Materials and Devices Institute of Advanced Electrochemical Energy&School of Materials Science and EngineeringXi’an University of TechnologyXi’an 710048ShaanxiChina State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001HenanChina School of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong ProvinceSchool of Environmental Science and EngineeringQingdao UniversityQingdao 266071ShandongChina International Center of Future Science Jilin UniversityChangchun 130012JilinChina

The carbon materials as anode electrodes have been widely studied for potassium ion batteries(PIBs).However,the large size of potassium ions prevents their intercalation/deintercalation,resulting in poor storage ***,a novel design of N/S codoped hierarchical carbonaceous fibers(NSHCF)formed from nanosheets self-assembled by catalyzing Aspergillus niger with Sn is *** asprepared NSHCF at 600℃(NSHCF-600)exhibits a high reversible capacity of 345.4 m Ah g^(-1) at 0.1 A g^(-1) after 100 cycles and an excellent rate performance of 124.5 m Ah g^(-1) at 2 A g^(-1).The excellent potassium storage performance can be ascribed to the N/S dual-doping,which enlarges interlayer spacing(0.404 nm)and introduces more *** larger interlayer spacing and higher pyridinic N active sites can promote K ions diffusion and *** addition,the ex situ transmission electron microscopy reveals the high reversibility of potassiation/depotassiation process and structural stability.

关键词： Carbonaceous fibers Large interlayer spacing Nitrogen/sulphur dual-doping Potassium-ion batteries

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液压动力卡瓦技术现状与发展趋势研究

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石油机械 2014年第11期42卷 41-45页

作者：赵磊马广蛇李洪波董毅军刘江何俊杰国家油气钻井装备工程技术研究中心宝鸡石油机械有限责任公司

自动液压动力卡瓦是井口机械自动化的重要一环。介绍了液压动力卡瓦的产品分类及特点,概述了液压动力卡瓦技术发展现状,尤其对当前NOv、B+v以及Weatherford公司的典型液压动力卡瓦的结构参数和性能特点进行了重点分析研究。最后指出了... 详细信息

自动液压动力卡瓦是井口机械自动化的重要一环。介绍了液压动力卡瓦的产品分类及特点,概述了液压动力卡瓦技术发展现状,尤其对当前NOv、B+v以及Weatherford公司的典型液压动力卡瓦的结构参数和性能特点进行了重点分析研究。最后指出了液压动力卡瓦的发展趋势:1向承载多样化,夹持多元化方向发展;2向高安全性、高可靠性方向发展;3向控制操作智能化、集成化方向发展。

关键词：液压动力卡瓦技术现状发展趋势

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介孔过渡金属钼酸盐纳米棒的制备及其高效电催化水氧化性能

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黑龙江大学自然科学学报 2018年第5期35卷 584-590页

作者：王江浩李莉萍王丽萍刘屹枫孙文港李文文李广社中国科学院大学福建物质结构研究所福州350002 吉林大学化学学院无机合成与制备化学国家重点实验室长春130012

采用两步法制备了过渡金属Fe、Co、Ni不同比例的介孔钼酸盐纳米棒。通过X-射线粉末衍射仪、扫描电子显微镜、透射电子显微镜、能谱仪以及氮气吸脱附测试系统等对其物相、形貌、结构、孔尺寸等性质进行了表征。结果表明,所合成出的不同Fe... 详细信息

采用两步法制备了过渡金属Fe、Co、Ni不同比例的介孔钼酸盐纳米棒。通过X-射线粉末衍射仪、扫描电子显微镜、透射电子显微镜、能谱仪以及氮气吸脱附测试系统等对其物相、形貌、结构、孔尺寸等性质进行了表征。结果表明,所合成出的不同Fe、Co、Ni比例的钼酸盐都呈现纳米棒状的形貌,并且在纳米棒上具有丰富的介孔,这些介孔可以提供更多的活性位点。通过调节催化剂中Fe、Co、Ni元素的比例,增强催化剂中多金属之间的协同作用,从而提高催化过程中的电荷转移速率,优化了析氧反应催化性质。催化性能测试结果显示,当Fe∶Co∶Ni=1∶1∶1时,样品具有最好的催化活性,电流密度为10 m A·cm^(-2)时的过电位仅为330 m v,该性能可以与商业用的贵金属催化剂Ir O2聘美。

关键词：钼酸盐纳米棒介孔析氧反应

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