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High loading FeS2 nanoparticles anchored on biomass-derived carbon tube as low cost and long cycle anode for sodium-ion batteries

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Green Energy & Environment 2020年第1期5卷 50-58页

作者： kongyao chen Gaojie Li Yanjie Wang Weihua chen Liwei Mi Center for Advanced Materials Research Zhongyuan University of TechnologyHenan450007China College of Chemistry and Molecular Engineering Zhengzhou UniversityHenan450001China

In recent years, the sodium storage mechanism and performance optimization of FeS2 have been studied intensively. However, before the commercial application of FeS2, preconditions of low-cost, simple craft and scale production of nanoscale FeS2 are also essential. Based on above challenges, mesh-like FeS2/carbon tube/FeS2 composites are prepared simply from green, low-cost and renewable natural herb in this work. With the assistance of protogenetic interconnected carbon tube network(only 5.3 wt%), FeS2/carbon tube/FeS2 composites show high capacity(542.2 mA h g^-1), good stability(< 0.005% per cycle over 1000 cycles), and excellent rate performance(426.2 mA h g^-1 at 2 A g^-1).The outstanding electrochemical performance of FeS2/carbon tube/FeS2 composites may be attributed to the unique interconnected reticular structure, meaning that FeS2 nanoparticles are effectively immobilized by carbon tube network via physical encapsulation and chemical *** importantly, this work may provide green and low cost preparation method for specially structured metal sulfides/carbon composites,which promotes their commercial utilization in environmentally friendly energy storage system.

关键词： FeS2 Biomass-drived carbon Mesh-like structure Low cost Sodium-ion batteries

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“Zincophilic‑Hydrophobic”PAN/PMMA Nanofiber Membrane Toward High‑Rate Dendrite‑Free Zn Anode

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Advanced Fiber Materials 2023年第6期5卷 2002-2015页

作者： Yanjie Wang Ning Li Huiyan Liu Juan Shi Yuequn Li Xukai Wu Zhuo Wang Chao Huang kongyao chen Dianbo Zhang Tianyu Wu Ping Li Cuixia Liu Liwei Mi Henan Key Laboratory of Functional Salt Materials Center for Advanced Materials ResearchZhongyuan University of Technology450007 ZhengzhouPeople’s Republic of China School of Energy and Environment Zhongyuan University of Technology45

Uncontrollable Zn dendrites and side reactions seriously downgrade the cycling stability of the Zn anode,and restrict the commercialization of aqueous zinc ion ***,PAN-based(PAN,PAN/PMMA)nanofiber membranes with uniform“zincophilic-hydrophobic”sites have been in-situ electrospun on Zn to effectively prevent harmful side reactions and control Zn plating/stripping *** abundant highly-negative functional groups(C≡N and C=O)of PAN/PMMA have strong coordination interactions with Zn2+,which can accelerate Zn2+desolvation and increase the Zn2+migration ***,the even distribution of zincophilic sites can help create a uniform Zn deposition environment and enable horizontal Zn ***,the inherent“hydrophobicity”of the nonpolar carbon skeleton in PAN/PMMA can prevent Zn corrosion and hydrogen evolution reaction(HER)side reactions,thus improving the cycling stability of the Zn *** a result,PAN/PMMA@Zn symmetric cells demonstrated remarkable rate performance and long cycling stability,sustaining efficient operation for over 2000 cycles at 10 mA cm^(−2)with a low polarization voltage below 65 *** Zn anode modification strategy by in-situ constructed PAN-based nanofiber membrane has the advantages of simple-preparation,one-step membrane construction,binder-free,uniform distribution of functionalized units,which not only provides a specific scheme for developing advanced Zn anode but also lays a certain research foundation for developing“separator-anode”integrated Zn-based batteries.

关键词： Zincophilic-hydrophobic Electrospun nanofiber membrane PAN/PMMA Dendrite-free Zn anode High-rate performance

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Multilayer Co3O4@C@MnO2 Nanowire Heterostructures For High-Performance Asymmetry Supercapacitor with Long Cycle Life

Multilayer Co3O4@C@MnO2 Nanowire Heterostructures For High-P...

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2018年中西部地区无机化学化工学术研讨会

作者： Yin Lu Yanjie Wang kongyao chen Weihua chen Shizhong Cui Liwei Mi Center for Advanced Materials Research Zhongyuan University of Technology College of Chemistry and Molecular Engineering Zhengzhou University

Heterostructures show excellent performance in energy and environment fields due to the unique interface structure and the advantages of ***,we introduce a facile and stepwise method to prepare multi-element CoO@C@MnO heterostructures on nickel foam as binder-free supercapacitor electrode materials,which crystalline CoO acting as intimal"core"and wrinkled ultrathin MnO nanosheets as the outer"shell".In three-electrode mode,CoO@C@MnO shows excellent electrochemical performances with a high specific capacitance of 1335.3 F g at 20 A g as well as long-term cycling ***,the asymmetry supercapacitor assembled with CoO@C@MnO heterostructures and active carbon shows excellent rate performance and long life (70 F g at 20 A g after 10000 cycles,even 61 F g at 20 A g after 30000 cycles).Compared with CoO@MnO or C@MnO,the improved performance of CoO@C@MnO heterostructures is proposed to be attributed to the synergistic effect in ***,the introduction of C between CoO and MnO could promote the electron transfer,reduce the impedance and thus improve the electrochemical performance of the heterostructures..

关键词： Heterostructures Asymmetry Supercapacitor Long Cycle Life

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陶粒改性对生物膜特性及除污效能的影响

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环境科学与技术 2016年第3期39卷 56-59,67页

作者：江子建陈秀荣许孔耀吴健华东理工大学资源与环境工程学院上海200237

为改善陶粒的除磷性能,该实验分别用FeCl_3和CaCl_2对普通陶粒进行改性,并考察了表面改性对陶粒表面的生物膜特性和除污特性的改善。结果表明,经FeCl_3和CaCl_2改性的陶粒对TP的去除率更高,但吸附效能随运行时间延长有下降趋势;陶粒经... 详细信息

为改善陶粒的除磷性能,该实验分别用FeCl_3和CaCl_2对普通陶粒进行改性,并考察了表面改性对陶粒表面的生物膜特性和除污特性的改善。结果表明,经FeCl_3和CaCl_2改性的陶粒对TP的去除率更高,但吸附效能随运行时间延长有下降趋势;陶粒经改性处理后表面生物膜多糖含量更多,脱氢酶活性更强,对TN和COD有较好的去除效果。

关键词：改性陶粒 TP TN COD 多糖脱氢酶活性

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超临界CO_2处理对乳状液稳定性的影响机理研究

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石油化工高等学校学报 2017年第4期30卷 32-37页

作者：李传宪刘亚洁杨爽阎孔尧陈亚群杨飞中国石油大学(华东)储运与建筑工程学院山东青岛266580 山东省油气储运安全省级重点实验室山东青岛266580 中国石化集团胜利石油管理局山东东营257002

超临界CO_2(scCO_2)混相驱在提高原油采收率的同时,也显著改变采出原油乳液的性质。利用自主研发的CO_2-原油混相装置在模拟地层条件下对长庆原油进行混相处理,分别使用流变仪、电导率仪和显微镜研究了混相处理前后长庆原油及其W/O乳液... 详细信息

超临界CO_2(scCO_2)混相驱在提高原油采收率的同时,也显著改变采出原油乳液的性质。利用自主研发的CO_2-原油混相装置在模拟地层条件下对长庆原油进行混相处理,分别使用流变仪、电导率仪和显微镜研究了混相处理前后长庆原油及其W/O乳液的流变性、稳定性和微观形貌。实验结果表明,scCO_2处理改变了长庆原油的组成,破坏了沥青质溶剂化层结构,使得失去保护的沥青质胶粒更易吸附于油水界面;scCO_2处理也使得析出的蜡晶尺寸更加细小,数量增加,这将导致乳液黏度显著增大。上述变化导致scCO_2处理后W/O原油乳液的水滴粒径变小、分布更加均匀,宏观表现为乳液体系的流动性恶化、稳定性增强。

关键词：超临界CO2 W/O原油乳液沥青质蜡晶稳定性 scCO2

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