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Progress in Gel Polymer Electrolytes for Sodium-Ion Batteries

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Energy & Environmental Materials 2023年第4期6卷 355-383页

作者： jinyun zheng Wenjie Li Xinxin Liu Jiawei Zhang Xiangming Feng Weihua Chen Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China

Sodium-ion battery is a potential application system for large-scale energy storage due to the advantage of higher nature abundance and lower production cost of sodium-based materials.However,there exist inevitably the safety problems such as flammability due to the use of the same type of organic liquid electrolyte with lithium-ion battery.Gel polymer electrolytes are being considered as an effective solution to replace conventional organic liquid electrolytes for building safer sodium-ion batteries.In this review paper,the authors present a comprehensive overview of the research progress in electrochemical and physical properties of the gel polymer electrolyte-based sodium batteries.The gel polymer electrolytes based on different polymer hosts namely poly(ethylene oxide),poly(acrylonitrile),poly(methyl methacrylate),poly(vinylidene fluoride),poly(vinylidene fluoride-hexafluoro propylene),and other new polymer networks are summarized.The ionic conductivity,ion transference number,electrochemical window,thermal stability,mechanical property,and interfacial issue with electrodes of gel polymer electrolytes,and the corresponding influence factors are described in detail.Furthermore,the ion transport pathway and ion conduction mechanism are analyzed and discussed.In addition,the advanced gel polymer electrolyte systems including flame-retardant polymer electrolytes,composite gel polymer electrolytes,copolymerization,single-ion conducting polymer electrolytes,etc.with more superior and functional performance are classified and summarized.Finally,the application prospects,development opportunities,remaining challenges,and possible solutions are discussed.

关键词： cycling performance gel polymer electrolyte ion conduction safety sodiumion battery

Green synthesis of novel conjugated poly(perylene diimide)as cathode with stable sodium storage

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Nano Research 2023年第7期16卷 9538-9545页

作者： jinyun zheng Xinxin Liu Wenbin Li Wenjie Li Xiangming Feng Weihua Chen College of Chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001China

Conjugated polymers of organic carbonyl compounds are promising electrode materials for energy storage devices owing to the renewable development prospects,structural variability,and better insolubility in electrolyte.However,the synthesis methods in solution are cumbersome and complicated in separation and purification,and require the introduction of functional groups and use of expensive catalysts.In this work,a novel conjugated poly(3,4,9,10-perylenetetracarboxylic diimide)(PPI)with superior thermal stability and lower solubility was prepared successfully by a green facile mechanical ball milling strategy.The PPI exhibits enhanced electrochemical dynamics performance,preferable rate capability,higher discharge capacity,and excellent cycling stability of 450 cycles at 0.2 C with higher capacity retention of 85.7%when used as cathode material for sodium-ion battery.Furthermore,the in-situ X-ray diffraction(XRD)and in-situ Raman investigations combined with the Fourier transform infrared(FT-IR)and X-ray photoelectron spectroscopy(XPS)were carried out to investigate the sodium storage mechanism.The results indicate that only two sodium ions are bound to two opposite carbonyl groups of PPI monomer to form sodium enolates during normal charging and discharging and to deliver available reversible capacity.

关键词： sodium-ion battery organic cathode carbonyl compound stability green synthesis

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长江中游通江湖泊对干流顶托作用变化规律

水科学进展 2024年第1期35卷 98-111页

作者：杨春瑞邓金运陈立郑柠辉赵晋武汉大学水资源工程与调度全国重点实验室湖北武汉430072

长江中游通江湖泊(洞庭湖和鄱阳湖)对干流的顶托作用直接关系到区域防洪安全。通过构造支流顶托强度指标并结合Copula函数,分析三峡水库蓄水前后两湖出流对长江干流顶托强度的变化和异同,讨论干支流流量分布和地形变化对两湖顶托强度变... 详细信息

长江中游通江湖泊(洞庭湖和鄱阳湖)对干流的顶托作用直接关系到区域防洪安全。通过构造支流顶托强度指标并结合Copula函数,分析三峡水库蓄水前后两湖出流对长江干流顶托强度的变化和异同,讨论干支流流量分布和地形变化对两湖顶托强度变化的贡献。研究结果表明:①三峡水库蓄水后,对干流顶托强度变化方面,汛期洞庭湖变化不大、鄱阳湖明显减弱;枯水期洞庭湖略有增强、鄱阳湖变化不大。②干支流流量分布导致的汇流比变化和江湖交汇区地形调整综合影响导致了两湖蓄水后顶托强度变化的差异;三峡水库蓄水后,干支流流量分布变化使洞庭湖、鄱阳湖对干流平均顶托强度分别减弱5.11%和13.45%;干流河床冲刷加剧导致的交汇区干支流河床高程差增大使洞庭湖、鄱阳湖对干流平均顶托强度分别增强6%和0.9%。

关键词：顶托作用汇流比 Copula函数长江中游洞庭湖鄱阳湖

Hierarchical porous onion-shaped LiMn204 as cathode material for lithium ion batteries

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Nano Research 2018年第8期11卷 4038-4048页

作者： Zihe Li Xiangming Feng Liwei Mi jinyun zheng Xiaoyang Chen Weihua Chen College of Chemistry and Molecular Engineering Zhengzhou University Zhengxhou 45000 I China Center for Advanced Materials Research Zhongyuan University of Technology Zhengzhou 450007 China National Engineering and Research Center for Adv. Polymer Processing Technology Zhengzhou University Zhengzhou 450001 China

Spinel niMn2O4 is a widely utilized cathode material for Li-ion batteries. However, its applications are limited by its poor energy density and power density. Herein, a novel hierarchical porous onion-like LiMn204 （LMO） was prepared to shorten the Li diffusion pathway with the presence of uniform pores and nanosized primary particles. The growth mechanism of the porous onion-like LiMn204 was analyzed to control the morphology and the crystal structure so that it forms a polyhedral crystal structure with reduced Mn dissolution. In addition, graphene was added to the cathode （LiMn2Odgraphene） to enhance the electronic conductivity. The synthesized LiMn2O4/graphene exhibited an ultrahigh-rate performance of 110.4 rnAh.g-1 at 50 C and an outstanding energy density at a high power density maintaining 379.4 Wh.kg-1 at 25,293 W.kg-L Besides, it shows durable stability, with only 0.02% decrease in the capacity per cycle at 10 C. Furthermore, the （LiMn2O4/graphene）/graphite full-cell exhibited a high discharge capacity. This work provides a promising method for the preparation of outstanding, integrated cathodes for potential applications in lithium ion batteries.

关键词： KEYWORDSLiMn2O4 hierarchical porous shape cathode rate performance Li-ion batteries

The role of magmatism in the thinning and breakup of the South China Sea continental margin

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National Science Review 2019年第5期6卷 871-876页

作者： Zhen Sun Jian Lin Ning Qiu Zhimin Jian Pin Xian Wang Xiong Pang jinyun zheng Benduo Zhu CAS Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of Sciences Innovation Academy of South China Sea Ecology and Environmental Engineering Chinese Academy of Sciences Department of Geology and Geophysics Woods Hole Oceanographic Institution School of Ocean and Earth Science Tongji University East South China Sea Petroleum Research Institute Shenzhen branch of China National Offshore Oil Corporation Guangzhou Marine Geological Survey Ministry of Natural Resources

INTRODUCTION Magmatism plays a key role in the process of continental margin breakup and ocean formation.Even in the extremely magma-poor Iberia and Newfoundland margin, studies of field outcrops have shown that syn-r... 详细信息

关键词： SCS The role of magmatism in the thinning and breakup of the South China Sea continental margin China

Facile synthesis of hierarchical Na2Fe(SO4)2@rGO/C as high-voltage cathode for energy density-enhanced sodium-ion batteries

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Journal of Energy Chemistry 2020年第11期29卷 387-394页

作者： Ge Yao Xixue Zhang Yongliang Yan Jiyu Zhang Keming Song Juan Shi Liwei Mi jinyun zheng Xiangming Feng Weihua Chen Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina Center for Advanced Materials Research Zhongyuan University of TechnologyZhengzhou 450007HenanChina

Fe-based sulfates are ideal cathode candidates for sodium-ion batteries(SIBs) owing to their high operating voltage and low cost but suffer from the nature of poor power performance. Herein, a hierarchical porous Na2Fe(SO4)2@reduced graphene oxide/carbon dot(Na2Fe(SO4)2@rGO/C) with low carbon content(4.12 wt%) was synthesized via a facile homogeneous strategy benefiting for engineering application,which delivers excellent sodium storage performance(high voltage plateau of 3.75 V, 85 m Ah g-1 and330 Wh kg-1 at 0.05 C;5805 W kg-1 at 10 C) and high Na+diffusion coefficient(1.19 × 10-12 cm2 s-1).Moreover, the midpoint voltage of assembled full cell could reach 3.0 V. The electron transfer and reaction kinetics are effectively boosted since the nanoscale Na2Fe(SO4)2 is supported by a robust crosslinked carbon matrix with rGO sheets and carbon dots. The slight rGO sheets sufficiently enhance the electron transfer like a current collecter and restrain the aggregation, as well as ensure smooth ion channels. Meanwhile, the carbon dots in the whole space connect with Na2Fe(SO4)2 and help rGO to promote the conductivity of the electrode. Ex-situ X-ray powder diffraction and X-ray photoelectron spectrometry analysis confirm the high reversibility of this sodiation/desodiation process.

关键词： Sodium ion batteries High-voltage cathode Fe-based sulfates Full cell Hierarchical structure

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外语课程思政的超语实践理据

外语教育研究 2024年第1期12卷 8-14页

作者：郑丽钦李金云福州大学外国语学院福州350108

课程思政建设为我国外语教育教学改革指引了新的方向和目标,也是外语教育教学进行反思和重构理念的契机。以单语主义为理念的传统外语教学存在重目标语轻母语、重语言轻育人等弊端,有碍外语课程思政建设。超语实践是多语主义理念下的语... 详细信息

课程思政建设为我国外语教育教学改革指引了新的方向和目标,也是外语教育教学进行反思和重构理念的契机。以单语主义为理念的传统外语教学存在重目标语轻母语、重语言轻育人等弊端,有碍外语课程思政建设。超语实践是多语主义理念下的语言理论和实践,其行动语言观、动态双语观和整合语库观为外语课程思政教学提供语言教育理论依据。

关键词：外语课程思政建设多语主义超语实践

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南海北部中生界地震成像制约因素分析

石油物探 2024年第2期63卷 318-335页

作者：曾婷郑金云张青林李洪博陶文芳李杰马艺璇中海石油(中国)有限公司深圳分公司广东深圳518054

南海北部中生界油气勘探积累了多个年度、多次采集、多种处理方案的地震资料,但地震成像品质总体上仍难以满足目前中生界油气勘探研究需求,对制约地震成像的影响因素认识不一,缺乏系统对比论证。通过对地质背景及沉积特征的分析,以现有... 详细信息

南海北部中生界油气勘探积累了多个年度、多次采集、多种处理方案的地震资料,但地震成像品质总体上仍难以满足目前中生界油气勘探研究需求,对制约地震成像的影响因素认识不一,缺乏系统对比论证。通过对地质背景及沉积特征的分析,以现有二维地震资料为基础,建立典型地质结构模型并正演模拟,对制约中生界地震成像品质的地质、地球物理因素进行剖析对比和论证,从定性和定量的角度明确了不同地质条件下造成现有地震资料品质差的主控因素。研究表明,制约中生界地震成像的主要因素是海底及中新生界之间的两个强反射界面、中生界地层内部波阻抗差异小所导致的低信噪比;绕射波、多次波等各种干扰波异常发育使有效信号难以识别和成像;崎岖海底造成照明能量散射等。南海北部中生界制约地震成像因素的明确为后续中生界地震数据采集、处理提供了有效指导及技术支持,并进一步提出通过适当加大震源容量、提高覆盖次数、深沉放枪缆、高维度,获得更多深层有效反射波能量的采集建议;通过自适应鬼波压制、多域提高信噪比处理及基于频率谐振能量补偿等技术解决弱反射问题,宽频组合解决多次波发育问题,基于地质、折射波增强速度规律认识,沿层高密度速度拾取提高速度分析精度等处理建议。

关键词：南海北部中生界地震资料品质强反射界面波阻抗差异崎岖海底地震照明能量

珠江口盆地珠二坳陷中部“对向拆离型复合洼陷”结构特征及其成因探讨

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地球科学 2024年第4期49卷 1385-1399页

作者：彭光荣郑金云蔡嵩陈兆明韩晋阳王梓颐中海石油(中国)有限公司深圳分公司广东深圳518054 中海石油深海开发有限公司广东深圳518054

南海北部陆缘深水区始新世多发育单向拆离断层,而珠二坳陷中部处于珠江口盆地珠二与珠一、珠三坳陷衔接带的南倾单一拆离断裂与北倾多级拆离断裂系交汇区,形成特有的“对向拆离型复合洼陷”,然而其结构特征及成因机制有待深入研究.基于... 详细信息

南海北部陆缘深水区始新世多发育单向拆离断层,而珠二坳陷中部处于珠江口盆地珠二与珠一、珠三坳陷衔接带的南倾单一拆离断裂与北倾多级拆离断裂系交汇区,形成特有的“对向拆离型复合洼陷”,然而其结构特征及成因机制有待深入研究.基于最新高精度全覆盖三维地震数据和始新世全序列钻井数据,恢复始新世关键地质时期(T80/T83)洼陷构造地貌为窄深分隔型至宽浅汇聚型转换格局,沉积中心从两侧近源陡坡带向中央带拆离迁移,对向断裂交汇区隆升断块沿东西向长轴展布;构造演化序列揭示出对向拆离断裂系启动于始新世关键构造变革期(T83~43 Ma),响应远程太平洋板块俯冲方向的变化,区内地壳在伸展应力的作用下拆离减薄,拆离断面之上广泛发生断块翘倾与差异隆升现象,从而接受剥蚀成为动态源区,同时伴生强烈岩浆活动,重塑了对向分布的箕状断陷结构,形成对向拆离区内长轴动态供给模型.厘定对向拆离型复合洼陷长轴动态源区与沉积中心时空配置,可为深水区始新世裂陷期优质烃-储组合预测提供有力支撑.

关键词：珠江口盆地珠二坳陷中部始新世对向拆离型复合洼陷结构特征成因探讨石油地质学