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Electron delocalization-enhanced sulfur reduction kinetics on an MXene-derived heterostructured electrocatalyst

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Nano Research 2024年第8期17卷 7153-7162页

作者： Yunmeng Li yinze zuo Xiang Li Yongzheng Zhang Cheng Ma Xiaomin Cheng Jian Wang Jitong Wang Hongzhen Lin Licheng Ling State Key Laboratory of Chemical Engineering Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education)East China University of Science and TechnologyShanghai 200237China Institute of New Energy Materials and Engineering College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education) School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China i-Lab&CAS Key Laboratory of Nanophotonic Materials and Device Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China Helmholtz Institute Ulm(HIU) D89081 UlmGermany

Lithium-sulfur(Li-S)batteries mainly rely on the reversible electrochemical reaction of between lithium ions(Li^(+))and sulfur species to achieve energy storage and conversion,therefore,increasing the number of free Li^(+)and improving the Li^(+)diffusion kinetics will effectively enhance the cell ***,Mo-based MXene heterostructure(MoS_(2)@Mo_(2)C)was developed by partial vulcanization of Mo_(2)C MXene,in which the introduction of similar valence S into Mo-based MXene(Mo_(2)C)can create an electron delocalization *** theoretical simulations and electrochemical characterisation,it is demonstrated that the MoS_(2)@Mo_(2)C heterojunction can effectively promote ion desolvation,increase the amount of free Li^(+),and accelerate Li^(+)transport for more efficient polysulfide *** addition,the MoS_(2)@Mo_(2)C material is also capable of accelerating the oxidation and reduction of polysulfides through its sufficient defects and vacancies to further enhance the catalytic ***,the Li-S battery with the designed MoS_(2)@Mo_(2)C electrocatalyst performed for 500 cycles at 1 C and still maintained the ideal capacity(664.7 mAh·g^(−1)),and excellent rate performance(567.6 mAh·g^(−1)at 5 C).Under the extreme conditions of high loading,the cell maintained an excellent capacity of 775.6 mAh·g^(−1)after 100 *** also retained 838.4 mAh·g^(−1)for 70 cycles at a low temperature of 0℃,and demonstrated a low decay rate(0.063%).These results indicate that the delocalized electrons effectively accelerate the catalytic conversion of lithium polysulfide,which is more practical for enhancing the behaviour of Li-S batteries.

关键词： delocalized electron lithium sulfur batteries MXene-based heterostructures catalytic desolvation multi-catalytic sites

Manipulating dielectric property of polymer coatings toward highretention-rate lithium metal full batteries under harsh critical conditions

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Nano Research 2023年第7期16卷 9240-9249页

作者： Qi Kang Zechao Zhuang Yong Li yinze zuo Jian Wang Yijie Liu Chaoqun Shi Jie Chen Hongfei Li Pingkai Jiang Xingyi Huang Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Chemistry Tsinghua UniversityBeijing 100084China Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of BremenBremen 28359Germany Institute for Sustainable Energy/College of Sciences Shanghai UniversityShanghai 200444China Helmholtz Institute Ulm(HIU) Ulm D89081Germany School of Electrical Engineering Xi’an Jiaotong UniversityXi’an 710049China

Lithium(Li)metal batteries(LMBs)can potentially deliver much higher energy density but remain plagued by uncontrollable Li plating with dendrite growth,unstable interfaces,and highly abundant excess Li(>50 mAh·cm^(-2)).Herein,different from the artificial layer or three-dimensional(3D)matrix host constructions,various dielectric polymers are initially well-comprehensively investigated from experimental characterizations to theoretical simulation to evaluate their functions in modulating Li ion *** a proof of concept,a 3D interwoven high dielectric functional polymer(HDFP)nanofiber network with polar C-F dipole moments electrospun on copper(Cu)foil is designed,realizing uniform and controllable Li deposition capacity up to 5.0 mAh·cm^(-2),thereby enabling stable Li plating/stripping cycling over 1400 h at 1.0 mA·cm^(-2).More importantly,under the highcathode loading(~3.1 mAh·cm^(-2))and only 0.6×excess Li(N/P ratio of 1.6),the full cells retain capacity retention of 97.4%after 200 cycles at 3.36 mA·cm^(-2)and achieve high energy density(297.7 Wh·kg^(-1)at cell-level)under lean electrolyte conditions(15μL),much better than ever-reported *** work provides a new direction for designing high dielectric polymer coating toward high-retention-rate practical Li full batteries.

关键词： high dielectric functional polymer nanofiber Li metal full cell low N/P ratio high-retention capacity

Facile carbon cloth activation strategy to boost oxygen reduction reaction performance for flexible zinc-air battery application

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Carbon Energy 2022年第5期4卷 762-775页

作者： Revanasiddappa Manjunatha Jingchao Yuan Li Hongwei Shu-Qi Deng Ejikeme R.Ezeigwe yinze zuo Li Dong Aijun Li Wei Yan Fangzhou Zhang Jiujun Zhang Institute for Sustainable Energy College of SciencesShanghai UniversityShanghaiChina Research Center for Composite Materials Shanghai UniversityShanghaiChina Zhaoqing Leoch Battery Technology Co.Ltd. Guangdong ProvinceChina College of Materials Science and Engineering Fuzhou UniversityFuzhouChina

Flexible and all-solid-state zinc-air batteries(ZABs)are highly useful and also in demand due to their theoretical high energy densities and special *** limitation in their performance arises due to their catalyst-coated cathode electrodes in terms of catalytic activity and stability as well as *** this paper,a novel and environmentally friendly activation strategy is developed to activate the carbon cloth(CC)for the *** activated CC serves as a catalyst-free air cathode with high conductivity,excellent mechanical strength,and flexibility,in addition to low *** strategy is performed by simply electro-oxidizing and electroreducing CC under ultrahigh direct current(DC)voltage in a diluted NH4Cl aqueous *** is found that the electro-oxidation not only results in the formation of a graphene-like exfoliated carbon layer on the surface of CC but also induces the incorporation of oxygen-containing groups and doping of nitrogen and chloride *** the electroreduction,theπ-conjugated carbon network of CC is partially restored,leading to the recovery of *** an electroactivated CC shows excellent oxygen reduction reaction *** aqueous flexibility and all-solid-state ZABs are assembled using such an electroactivated CC cathode without any catalyst *** ZABs can achieve good durability and deliver high peak power density and an energy density as high as 690 Wh kg^(−1),demonstrating the excellent potential of this electroactivated CC in practical devices.

关键词： carbon cloth,catalyst-free electroactivation nitrogen and chlorine co-doping oxygencontaining groups ultrahigh and ultralow direct current voltage

PFOA/硅烷偶联剂分子自组装膜对环氧带锈涂层性能影响

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中国腐蚀与防护学报 2017年第6期37卷 554-560页

作者：左银泽陈亮冯清高延敏江苏科技大学材料科学与工程学院镇江212003

使用全氟辛酸铵(PFOA)和KH550、KH560两种硅烷偶联剂的混合溶液对Q235钢表面进行预处理,明确PFOA/KH550、PFOA/KH560两种溶液在基材表面成膜,并对表面预处理钢进行接触角、CuSO_4点滴实验、极化曲线测试,然后在表面涂覆环氧涂料,通过对... 详细信息

使用全氟辛酸铵(PFOA)和KH550、KH560两种硅烷偶联剂的混合溶液对Q235钢表面进行预处理,明确PFOA/KH550、PFOA/KH560两种溶液在基材表面成膜,并对表面预处理钢进行接触角、CuSO_4点滴实验、极化曲线测试,然后在表面涂覆环氧涂料,通过对环氧涂层进行基本性能测试和电化学极化曲线实验,考察这两种表面处理剂在金属基材表面附着对环氧带锈涂层性能的影响。结果表明:经过PFOA/KH550和PFOA/KH560处理过的带锈表面的接触角分别增加了17.2%和11.7%,CuSO_4点滴实验的时间分别提高了64.7%和38.8%,腐蚀电流分别降低了93.5%和78.7%。不同环氧涂层的测试结果表明:PFOA/KH550混合溶液处理的带锈表面的环氧带锈涂层效果最好,各项性能明显提升,其中附着力和耐冲击强度分别提升14.3%和11%,腐蚀电流比原锈层表面涂层降低96.2%,耐盐水浸泡62 d无明显变化。

关键词：表面处理硅烷偶联剂全氟辛酸铵带锈涂层腐蚀

改性2-氨基嘧啶型转锈剂的制备及其在带锈涂层中的防腐蚀效果

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腐蚀与防护 2019年第6期40卷 396-401页

作者：陈亮左银泽王玉高延敏江苏科技大学材料科学与工程学院

将接枝不同脂肪酸的2-氨基嘧啶作为转锈剂与环氧-聚乙烯醇缩丁醛(EP-PVB)配合制成带锈涂层,并通过扫描电镜(SEM)和电化学测试对涂层形貌和耐蚀性进行观察与测试。结果表明:转锈剂可在锈层表面形成一层自组装膜,膜层的形貌与接枝使用的... 详细信息

将接枝不同脂肪酸的2-氨基嘧啶作为转锈剂与环氧-聚乙烯醇缩丁醛(EP-PVB)配合制成带锈涂层,并通过扫描电镜(SEM)和电化学测试对涂层形貌和耐蚀性进行观察与测试。结果表明:转锈剂可在锈层表面形成一层自组装膜,膜层的形貌与接枝使用的脂肪酸碳链长度相关,用月桂酸接枝的2-氨基嘧啶转锈剂成膜性最佳;转锈剂与EP-PVB配合制成带锈涂层的防蚀腐效果受转锈剂成膜性的影响,用月桂酸接枝改性的2-氨基嘧啶转锈剂与EPPVB配合涂装的带锈涂层的耐蚀性最佳。

关键词： 2-氨基嘧啶脂肪酸转锈剂带锈涂层

纳米CaCO_3/纳米SiO_2共混改性HDPE的性能研究

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现代塑料加工应用 2017年第3期29卷 18-21页

作者：左银泽陈亮李岩沈海滨高延敏江苏科技大学材料科学与工程学院江苏镇江212003

采用钛酸酯偶联剂改性纳米CaCO_3,硅烷偶联剂改性纳米SiO_2,并用其填充高密度聚乙烯(HDPE),并对二元、三元复合物进行了微观形貌表征和力学性能测试。结果表明,纳米CaCO_3主要起到增韧的作用,纳米SiO_2主要起到增强的作用,HDPE/纳米CaCO... 详细信息

采用钛酸酯偶联剂改性纳米CaCO_3,硅烷偶联剂改性纳米SiO_2,并用其填充高密度聚乙烯(HDPE),并对二元、三元复合物进行了微观形貌表征和力学性能测试。结果表明,纳米CaCO_3主要起到增韧的作用,纳米SiO_2主要起到增强的作用,HDPE/纳米CaCO_3/纳米SiO_2混合质量比为100∶25∶7的三元复合物的拉伸强度比纯HDPE提高了17.6%,缺口冲击强度提高了34.5%。

关键词：高密度聚乙烯共混改性纳米碳酸钙纳米二氧化硅偶联剂

应用巢式PCR检测孕妇血浆中cffDNA RHD基因型的研究

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中国输血杂志 2016年第8期29卷 785-787页

作者：陈利萍左琴琴徐华周华友张印则陕西省血液中心陕西西安710061 南方医科大学南方医院深圳市血液中心

目的建立巢式PCR技术检测RhD阴性孕妇血浆中游离胎儿DNA(cffDNA)的RHD基因型,以预测胎儿RhD血型。方法采用QIAamp DNA Blood Mini Kit提取32例RhD阴性孕妇血浆游离DNA,针对RHD外显子7和10分别设计外侧、内侧2组特异性引物,巢式PCR方法... 详细信息

目的建立巢式PCR技术检测RhD阴性孕妇血浆中游离胎儿DNA(cffDNA)的RHD基因型,以预测胎儿RhD血型。方法采用QIAamp DNA Blood Mini Kit提取32例RhD阴性孕妇血浆游离DNA,针对RHD外显子7和10分别设计外侧、内侧2组特异性引物,巢式PCR方法检测孕妇血浆游离胎儿DNA的RHD型,测序验证PCR产物的序列特异性。结果孕妇血浆游离DNA经巢式PCR扩增后,有27例成功扩增出RHD外显子7、10特异性条带,5例未检测到RHD基因特异性扩增,32例中有30例胎儿RHD型与出生后血型相符,检测准确率为93.1%。结论采用巢式PCR技术检测RhD阴性孕妇血浆游离胎儿DNA来判定胎儿RHD型,具有良好的准确性、敏感性和特异性,为RhD新生儿溶血病的早期诊断提供了一种新的、可靠的检测手段。

关键词：巢式PCR 血浆游离胎儿DNA RHD RhD新生儿溶血

自组装PFOA分子膜对带锈Q235钢腐蚀行为影响

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中国腐蚀与防护学报 2018年第1期38卷 81-86页

作者：左银泽许宝华朱桂生黄诚冯清陈亮李照磊高延敏江苏科技大学材料科学与工程学院镇江212003 江苏索普(集团)有限公司镇江212006

使用全氟辛酸铵(PFOA)作为锈层处理剂,研究了PFOA浓度变化对清洗带锈Q235钢表面锈层效果和Q235钢腐蚀行为的影响。使用EDS、SEM分析技术以及接触角、电化学极化曲线和电化学阻抗等测试方法对经1,10,100,150和200 g/L的PFOA溶液处理后Q23... 详细信息

使用全氟辛酸铵(PFOA)作为锈层处理剂,研究了PFOA浓度变化对清洗带锈Q235钢表面锈层效果和Q235钢腐蚀行为的影响。使用EDS、SEM分析技术以及接触角、电化学极化曲线和电化学阻抗等测试方法对经1,10,100,150和200 g/L的PFOA溶液处理后Q235钢表面的化学结构、基本组成、表面形貌、润湿性和耐腐蚀性等进行表征。结果表明:PFOA溶液具有扩散性和润湿性,并能透过多孔锈层渗透到基材表面,与表面Fe离子发生配位作用,通过分子自组装的方式形成分子膜。该吸附膜破坏了锈层和基材的结合,有利于锈层的清理。PFOA浓度为150 g/L时的除锈效果最好;相比于空白样品,表面锈层基本消失,接触角增大111.9%,CuSO_4点滴实验变色时间延长70%,腐蚀电流降低53.3%,表面膜容抗电阻增加193%。

关键词： PFOA分子膜带锈表面表面处理电化学

抗-D产生与HLA-DRB1基因相关性研究

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中国输血杂志 2014年第12期27卷 1290-1292页

作者：吴大洲王满妮周丹左琴琴徐华周华友张印则陕西省血液中心陕西西安710061 深圳市血液中心广东省中医院广州中医药大学第二附属医院输血科

目的研究抗-D产生与HLA-DRB1基因的相关性。方法随机挑选297名汉族志愿献血者,采用PCRr SSO反向杂交Luminex高分辨分型技术对其进行HLA-DRB1基因分型,同时采用血清学方法进行RhD、C、c、E、e抗体检测;并以2012年中华造血干细胞库HLA分... 详细信息

目的研究抗-D产生与HLA-DRB1基因的相关性。方法随机挑选297名汉族志愿献血者,采用PCRr SSO反向杂交Luminex高分辨分型技术对其进行HLA-DRB1基因分型,同时采用血清学方法进行RhD、C、c、E、e抗体检测;并以2012年中华造血干细胞库HLA分型资料作为正常对照。结果抗体组与对照组相比,DRB1*07∶01等位基因频率显著升高(P<0.05),其它等位基因频率在2组间的差异未发现有统计学意义。结论 DRB1*07∶01等位基因可能与RhD抗体产生有关。

关键词： Rh血型 HLA基因基因表型频率