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Accelerating lithium-sulfur battery reaction kinetics and inducing 3D deposition of Li_(2)S using interactions between Fe_(3)Se_(4)and lithium polysulfides

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Journal of Energy Chemistry 2024年第8期95卷 540-553,I0012页

作者： Yihan Lin Liheng Li Longjie Tan Yongliang Li Xiangzhong Ren peixin zhang Chuanxin He Lingna Sun College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina

Although lithium-sulfur batteries(LSBs)exhibit high theoretical energy density,their practical application is hindered by poor conductivity of the sulfur cathode,the shuttle effect,and the irreversible deposition of Li_(2)*** address these issues,a novel composite,using electrospinning technology,consisting of Fe_(3)Se_(4)and porous nitrogen-doped carbon nanofibers was designed for the interlayer of *** porous carbon nanofiber structure facilitates the transport of ions and electrons,while the Fe_(3)Se_(4)material adsorbs lithium polysulfides(LiPSs)and accelerates its catalytic conversion ***,the Fe_(3)Se_(4)material interacts with soluble LiPSs to generate a new polysulfide intermediate,Li_(x)FeS_(y)complex,which changes the electrochemical reaction pathway and facilitates the three-dimensional deposition of Li_(2)S,enhancing the reversibility of *** designed LSB demonstrates a high specific capacity of1529.6 mA h g^(-1)in the first cycle at 0.2 *** rate performance is also excellent,maintaining an ultra-high specific capacity of 779.7 mA h g^(-1)at a high rate of 8 *** investigation explores the mechanism of the interaction between the interlayer and LiPSs,and provides a new strategy to regulate the reaction kinetics and Li_(2)S deposition in LSBs.

关键词： Lithium-sulfur batteries Polysulfide intermediates Li_(2)S electrodeposition Interlayers Electrostatic spinning Adsorption Catalysis

DeepWMH:无需人工标注训练的脑白质高信号病灶分割工具

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Science Bulletin 2024年第7期69卷 872-875页

作者：刘成浩卓芝政曲丽莹金颖华田田徐俊谭桂荣李玉娜段云云王婷婷张在强张艳玲陈瑞余嫔男 peixin zhang 施余露张建国田德才李润芝张星虎施福东王艳丽姜季委 Aaron Carass 刘亚欧叶初阳 School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China Department of Radiology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Beijing Key Laboratory of Neurostimulation Beijing 100070China China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalBeijing 100070China Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijing 100070China Department of Electrical and Computer Engineering Johns Hopkins UniversityBaltimore 21205USA

White matter hyperintensities(WMHs)on fluid-attenuated inversion recovery(FLAIR)images are imaging features in various neurological diseases and essential markers for clinical impairment and disease *** are associated with brain aging and pathological changes in the human brain,such as in Alzheimer’s disease(AD)[1],Parkinson’s disease(PD)[2],cerebral small vessel disease(SVD)[3],multiple sclerosis(MS)[4].

关键词： diseases clinical Alzheimer

Hybrid CuO-Co_(3)O_(4)nanosphere/RGO sandwiched composites as anode materials for lithium-ion batteries

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Chinese Journal of Chemical Engineering 2022年第7期35卷 185-192页

作者： Yingmeng zhang Luting Liu Qingwei Deng Wanlin Wu Yongliang Li Xiangzhong Ren peixin zhang Lingna Sun College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Hybrid CuO-Co_(3)O_(4)nanosphere building blocks have been embedded between the layered nanosheets of reduced graphene oxides with a three dimensional(3D)hybrid architecture(CuO-Co_(3)O_(4)-RGO),which are successfully applied as enhanced anodes for lithium-ion batteries(LIBs).The CuO-Co_(3)O_(4)-RGO sandwiched nanostructures exhibit a reversible capacity of~847 mA·h·g^(-1)after 200 cycles’cycling at 100 mA·g^(-1)with a capacity retention of 79%.The CuO-Co_(3)O_(4)-RGO compounds show superior electrochemical properties than the comparative CuO-Co_(3)O_(4),Co_(3)O_(4)and CuO anodes,which may be ascribed to the following reasons:the hybridizing multicomponent can probably give the complementary advantages;the mutual benefit of uniformly distributing nanospheres across the layered RGO nanosheets can avoid the agglomeration of both the RGO nanosheets and the CuO-Co_(3)O_(4) nanospheres;the 3D storage structure as well as the graphene wrapped composite could enhance the electrical conductivity and reduce volume expansion effect associated with the discharge-charge process.

关键词： Composites Nanostructure Nanoparticles Reduced graphene oxide Metal oxides Lithium ion batteries

Anti-aggregation growth and hierarchical porous carbon encapsulation enables the C@VO_(2) cathode with superior storage capability for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2022年第4期31卷 645-654页

作者： Ming Yang Yanyi Wang Zhongwei Sun Hongwei Mi Shichang Sun Dingtao Ma peixin zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina College of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Shenzhen Hello Tech Energy Co. Ltd.Shenzhen 518100GuangdongChina Guangdong Engineering Technology Research Center for Distributed and Intelligent Small Solar Energy Storage Shenzhen 518100GuangdongChina

Self-aggregation and sluggish transport kinetics of cathode materials would usually lead to the poor electrochemical performance for aqueous zinc-ion batteries(AZIBs).In this work,we report the construction of C@VO_(2) composite via anti-aggregation growth and hierarchical porous carbon *** of the morphology of composite and pore structure of carbon layer can be regulated by tuning the adding amount of *** acting as cathode applied for AZIBs,the C@VO_(2)-3:3 composite can deliver a high capacity of 281 m Ah g^(-1) at 0.2 A g^(-1).Moreover,such cathode also exhibits a remarkably rate capability and cyclic stability,which can release a specific capacity of 195 m Ah g^(-1) at 5 A g^(-1) with the capacity retention of 95.4%after 1000 *** that,the evolution including the crystal structure,valence state and transport kinetics upon cycling were also deeply *** conclusion,benefited from the synergistic effect of anti-aggregation morphology and hierarchical porous carbon encapsulation,the building of such C@VO_(2) composite can be highly expected to enhance the ion accessible site,boost the transport kinetics and thus performing a superior storage *** design concept can be applied for other kinds of electrode materials and accelerating the development of highperformance AZIBs.

关键词： Aqueous zinc-ion batteries Anti-aggregation Hierarchical porous carbon encapsulation C@VO_(2)composite Storage mechanism

不同骨架材质纳米纤维对空气中多种金属元素的捕集效率比较研究

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广东化工 2024年第3期51卷 14-16页

作者：邓晓燕张培新康学军江苏省地质调查研究院江苏南京210018 东南大学江苏南京210096

本文研制了聚苯乙烯(PS)、聚苯硫醚(PPS)、醋酸素(AC)、丙烯酸树脂(AR)、聚丙烯腈(PAN)、聚酰胺(PA6)六种高分子材料滤膜,XRD测试结果表明其结晶型不同,接触角测试结果表明PA6、PAN是亲水性、PS、PPS、AC、AR是疏水性材料。对空气颗粒... 详细信息

本文研制了聚苯乙烯(PS)、聚苯硫醚(PPS)、醋酸素(AC)、丙烯酸树脂(AR)、聚丙烯腈(PAN)、聚酰胺(PA6)六种高分子材料滤膜,XRD测试结果表明其结晶型不同,接触角测试结果表明PA6、PAN是亲水性、PS、PPS、AC、AR是疏水性材料。对空气颗粒物中的重金属富集后,用振荡的前处理技术洗脱、解析目标金属离子,通过ICP-MS检测方法对铬(Cr)、锰(Mn)、镍(Ni)、铜(Cu)、镉(Cd)、锡(Sn)、铅(Pb)、砷(As)和硒(Se)九种重金属离子进行测定。实验发现,不同的纳米纤维滤膜对不同的重金属离子具有选择性的捕集作用。其中,PS和PA6对Cr富集效率比其他的元素要高,AR对Sn富集效率好,PAN对Cr和Sn富集效率相对其他的离子显著提高,PPS对Pb的捕集效率大大提高,远远高于其它离子。AC对Pb、Cr、Ni吸附效果好,对于具有金属和非金属两性的元素As和Se吸附效果也较好。研究表明,采用纳米纤维捕集空气中重金属为环境空气中痕量重金属元素分析提供一种简便、快速、灵敏、准确的新采样方法。

关键词：纳米纤维重金属 ICP-MS

Fe_(2)O_(3)-MWNTs Composite with Reinforced Concrete Structure as High-performance Anode Material for Lithium-ion Batteries

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Chemical Research in Chinese Universities 2023年第2期39卷 240-245页

作者： WANG Suhang ZUO Jinxin LI Yongliang ZHONG Yiming REN Xiangzhong zhang peixin SUN Lingna College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen518060P.R.China Babel International College PerthWA6100Australia

A Fe_(2)O_(3)-MWNTs(multi-walled carbon nanotubes)composite with a reinforced concrete structure was fabricated employing a two-step method which involves a sol-gel process followed by high-temperature in situ *** Fe_(2)O_(3)-MWNTs composite,intended to be used as an anode material for lithium-ion batteries,maintained a reversible capacity as high as 896.3 mA·h/g after 100 cycles at a current density of 100 mA/g and the initial coulombic efficiency reached 75.5%.The rate capabilities of the Fe_(2)O_(3)-MWNTs composite,evaluated using the ratios of capacity at 100,200,500,1000,2000 and 100 mA/g after every 10 cycles,were determined to be 904.7,852.1,759.0,653.8,566.8 and 866.3 mA·h/g,*** a superior electrochemical performance of the Fe_(2)O_(3)-MWNTs composite is mainly attributed to the reinforced concrete construction,in which the MWNTs function as the skeleton and conductive *** a structure contributes to shortening the transport pathways for both Li+and electrons,enhancing conductivity and accommodating volume expansion during prolonged *** Fe_(2)O_(3)-MWNTs composite with the designed structure is a promising anode material for high-performance lithium-ion batteries.

关键词： Lithium-ion battery Anode material Fe_(2)O_(3)-multi-walled carbon nanotubes(MWNTs)composite Sol-gel Reinforced concrete structure

3D Artificial Array Interface Engineering Enabling Dendrite-Free Stable Zn Metal Anode

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Nano-Micro Letters 2023年第3期15卷 112-128页

作者： Jianbin Ruan Dingtao Ma Kefeng Ouyang Sicheng Shen Ming Yang Yanyi Wang Jinlai Zhao Hongwei Mi peixin zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China College of of Materials Science and Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Center Shenzhen 518060People’s Republic of China

The ripple effect induced by uncontrollable Zn deposition is considered as the Achilles heel for developing high-performance aqueous Zn-ion *** this problem,this work reports a design concept of 3D artificial array interface engineering to achieve volume stress elimination,preferred orientation growth and dendrite-free stable Zn metal *** mechanism of MXene array interface on modulating the growth kinetics and deposition behavior of Zn atoms were firstly disclosed on the multi-scale level,including the in-situ optical microscopy and transient simulation at the mesoscopic scale,in-situ Raman spectroscopy and in-situ X-ray diffraction at the microscopic scale,as well as density functional theory calculation at the atomic *** indicated by the electrochemical performance tests,such engineered electrode exhibits the comprehensive enhancements not only in the resistance of corrosion and hydrogen evolution,but also the rate capability and cyclic ***-rate performance(20 mA cm^(-2))and durable cycle lifespan(1350 h at 0.5 mA cm^(-2),1500 h at 1 mA cm^(-2)and 800 h at 5 mA cm^(-2))can be ***,the improvement of rate capability(214.1 mAh g^(-1)obtained at 10 A g^(-1))and cyclic stability also can be demonstrated in the case of 3D MXene array@Zn/*** the previous 2D closed interface engineering,this research offers a unique 3D open array interface engineering to stabilize Zn metal anode,the controllable Zn deposition mechanism revealed is also expected to deepen the fundamental of rechargeable batteries including but not limited to aqueous Zn metal batteries.

关键词： Aqueous Zn-ion batteries Volume stress 3D artificial array interface Controllable deposition Zn metal anode

A Multifunctional Anti-Proton Electrolyte for High-Rate and Super-Stable Aqueous Zn-Vanadium Oxide Battery

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Nano-Micro Letters 2022年第9期14卷 272-289页

作者： Yangwu Chen Dingtao Ma Kefeng Ouyang Ming Yang Sicheng Shen Yanyi Wang Hongwei Mi Lingna Sun Chuanxin He peixin zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China

Large volumetric expansion of cathode hosts and sluggish transport kinetics in the cathode–electrolyte interface,as well as dendrite growth and hydrogen evolution at Zn anode side are considered as the system problems that cause the electrochemical failure of aqueous Zn-vanadium oxide *** this work,a multifunctional anti-proton electrolyte was proposed to synchronously solve all those *** and experimental studies confirm that PEG 400 additive can regulate the Zn^(2+) solvation structure and inhibit the ionization of free water molecules of the ***,smaller lattice expansion of vanadium oxide hosts and less associated by-product formation can be realized by using such ***,such electrolyte is also beneficial to guide the uniform Zn deposition and suppress the side reaction of hydrogen *** to the integrated synergetic modifica-tion,a high-rate and ultrastable aqueous Zn-V_(2)O_(3)/C battery can be constructed,which can remain a specific capacity of 222.8 m Ah g^(-1)after 6000 cycles at 5 A g^(-1),and 121.8 m Ah g^(-1) even after 18,000 cycles at 20 A g^(-1),***“all-in-one”solution based on the electrolyte design provides a new strategy for developing high-performance aqueous Zn-ion battery.

关键词： Zn-vanadium oxide battery Multifunctional anti-proton electrolyte Integrated synergetic modification “All-in-one”solution

Existence and uniqueness of global classical solutions to 3D isentropic compressible Navier-Stokes equations with general initial data

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Science China Mathematics 2014年第7期57卷 1463-1478页

作者： zhang peixin ZHAO JunNing School of Mathematical Sciences Xiamen University School of Mathematical Sciences Huaqiao University

In this paper we study the global existence and uniqueness of classical solutions to the Cauchy problem for 3D isentropic compressible Navier-Stokes equations with general initial data which could contain *** give the relation between the viscosity coefficients and the initial energy,which implies that the Cauchy problem under consideration has a global classical solution.

关键词：可压缩Navier-Stokes方程整体经典解等熵 3D Cauchy问题初始能量古典解系数和