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Improving sulfur transformation of lean electrolyte lithium-sulfur battery using nickel nanoparticles encapsulated in N-doped carbon nanotubes

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Electron 2024年第1期2卷 95-105页

作者： Ze Zhang Yuqing Xu Donggen Xiong Ji Yu Jianxin Cai yizhong huang Zhenyu Yang School of Chemistry and Chemical Engineering Nanchang UniversityNanchangChina School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Efficient redox reactions of lean electrolyte lithium-sulfur(Li-S)batteries highly rely on rational catalyst ***,we report an electrocatalyst based on N-doped carbon nanotubes(CNT)-encapsulated Ni nanoparticles(Ni@NCNT)as kinetics regulators for Li-S batteries to propel the polysulfide-involving multiphase ***,such a CNT-encapsulation strategy greatly prevents the aggregation of Ni nanoparticles and enables the extraordinary structural stability of the hybrid electrocatalyst,which guarantees its persistent catalytic activity on sulfur redox *** used as a modified layer on a commercial separator,the Ni@NCNT interlayer contributes to stabilizing S cathode and Li anode by significantly retarding the shuttle *** corresponding batteries with a 3.5 mg cm^(−2)sulfur loading achieve the promising cycle stability with~85%capacity retention at the electrolyte/sulfur ratios of 5 and 3μL mg^(−1).Even at a high loading of 12.2 mg cm^(−2),the battery affords an areal capacity of 7.5 mA h cm^(−2).

关键词： kinetics regulator lean electrolyte lithium-sulfur battery metal nickel nanoparticles N-doped CNT-encapsulated

Corrosion engineering on AlCoCrFeNi high-entropy alloys toward highly efficient electrocatalysts for the oxygen evolution of alkaline seawater

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矿物冶金与材料学报:英文版 2023年第10期30卷 1922-1932页

作者： Zhibin Chen Kang huang Bowei Zhang Jiuyang Xia Junsheng Wu Zequn Zhang yizhong huang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore

Seawater splitting is a prospective approach to yield renewable and sustainable hydrogen *** preparation processes and poor repeatability are currently considered to be an insuperable impediment to the promotion of the large-scale production and application of *** the use of intricate instruments,corrosion engineering is an intriguing strategy to reduce the cost and presents considerable potential for electrodes with catalytic *** anode comprising quinary AlCoCrFeNi layered double hydroxides uniformly decorated on an AlCoCrFeNi high-entropy alloy is proposed in this paper via a one-step corrosion engineering method,which directly serves as a remarkably active catalyst for boosting the oxygen evolution reaction(OER)in alkaline ***,the best-performing catalyst exhibited oxygen evolution reaction activity with overpotential values of 272.3 and 332 mV to achieve the current densities of 10 and100 mA·cm^(-2),*** failure mechanism of the obtained catalyst was identified for advancing the development of multicomponent catalysts.

关键词： corrosion engineering oxygen evolution reaction catalysts layered double hydroxides seawater splitting failure mechanism

Electrochemical behaviors of hierarchical copper nano- dendrites in alkaline media

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Nano Research 2018年第8期11卷 4225-4231页

作者： Bowei Zhang Guang Yang Chaojiang Li Kang huang Junsheng Wu Shiji Hao yizhong huang School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Interdisciplinary Graduate School Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Department of Materials Science and Engineering National University of Singapore 9 Engineering Drive I Singapore 117575Singapore Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China

In this study, hierarchical copper nano-dendrites （CuNDs） are fabricated via the electrodeposition method. The electrochemical behaviors of the as-obtained hierarchical CuNDs in 0.1 M NaOH aqueous solution are subsequently studied. The CuNDs experience a non-equilibritrm oxidation process when subjected to cyclic voltammetry （CV） measurements. The first oxidation peak O1 in CV is attributed to the formation of an epitaxial Cu20 layer over the surface of the hierarchical CuNDs. However, the second oxidation peak 02 in CV appears unusually broad across a wide potential range. In this region, the reaction process starts with the nucleation and growth of Cu（OH）2 nanoneedles, followed by the oxidation of Cu20. Upon the increase of potential Cu20 is gradually transformed to CuO and Cu（OH）2, forming a dual-layer structure with high productivity of Cu（OH）2 nanoneedles.

关键词： copper nano-dendrites(CuNDs) non-equilibrium oxidation Cu(OH)2 nanoneedles alkaline aqueous solution

In situ optical spectroscopic understanding of electrochemical passivation mechanism on sol–gel processed WO_(3) photoanodes

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Journal of Energy Chemistry 2022年第8期31卷 20-28,I0002页

作者： Jianyong Feng Xin Zhao Bowei Zhang Zhong Chen Zhaosheng Li yizhong huang Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093JiangsuChina School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore

A prevailing understanding on electrochemical activation of photoelectrodes is that electrochemical treatment leads to increased charge carrier densities thereby improved photoelectrode *** to this understanding,in this study enhanced photoactivity of WO_(3) photoanode upon electrochemical treatment is ascribed to an extraordinary mechanism of surface trap *** associated mechanism is analyzed by in situ optical spectroscopy,using which the optical property changes of WO_(3) electrode during electrochemical treatment are *** results suggest surface W^(5+)species,the origin of surface traps on WO_(3) photoanodes,are converted to W^(6+) ions by electrochemical *** study demonstrates the particular ability of the electrochemical strategy to passivate surface traps of photoanodes,and also shows the advantages of in situ optical spectroscopy to investigate the real-time electronic structure variations of electrodes during electrochemical treatment.

关键词： In situ optical spectroscopy Electrochromism Surface trap Solar water splitting Tungsten oxide Hydrogen

Cobalt tungsten phosphide with tunable W-doping as highly efficient electrocatalysts for hydrogen evolution reaction

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Nano Research 2021年第11期14卷 4073-4078页

作者： Bowei Zhang Chaojiang Li Jun Hu Dongdong Peng Kang huang Junsheng Wu Zhong Chen yizhong huang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore School of mechanical engineering Beijing Institute of TechnologyZhongguancun AvenueHaidian districtBeijing100081China School of Chemical Engineering Northwest UniversityXi’an710069China

It has been of interest in seeking electrocatalysts that could exercise equally high-efficient and durable hydrogen evolution upon nonselective electrolytes in both acidic and alkaline environments. Herein, we report a facile strategy to fabricate cobalt tungsten phosphides (CoxW2−xP2/C) hollow polyhedrons with tunable composition based on metal-organic frameworks (MOFs) template method. By the deliberate control of W doping, the synthesized catalyst with the composition of Co0.9W1.1P2/C is found to be able to achieve a current density of 10 mA·cm^(−2) at overpotentials of 35 and 54 mV in acidic and alkaline media, respectively. This combined electrochemical property stands atop the state-of-the-art electrocatalyst counterparts. To unveil the peculiar behavior of the structure, density functional theory (DFT) calculation was implemented and reveals that the surface W-doping facilitates the optimization of hydrogen absorption free energy (ΔGH*) as well as the thermodynamic and kinetics barriers for water dissociation, which is coupled with the hollow structure of Co-W phosphides, leading to the prominent HER catalytic performance.

关键词： cobalt tungsten phosphide W-doping tunable composition hydrogen evolution reaction acid and alkaline media

An atlas of expression quantitative trait loci of microRNAs in longissimus muscle of eight-way crossbred pigs

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Journal of Genetics and Genomics 2023年第6期50卷 398-409页

作者： Liepeng Zhong Min Zheng yizhong huang Tao Jiang Bin Yang Lusheng huang Junwu Ma State Key Laboratory for Pig Genetic Improvement and Production Technology Jiangxi Agricultural UniversityNanchangJiangxi 330045China

MicroRNAs(miRNAs)are key regulators of myocyte development and traits,yet insight into the genetic basis of variation in miRNA expression is still ***,we present a systematic analysis of expression quantitative trait loci(eQTL)for miRNA profiling in longissimus muscle of pigs from an eight-breed crossed heterogeneous *** integrating the whole-genome sequencing and miRNAomics data,we map 54 cis-and 292 trans-e QTLs at high resolution that are associated with the expression of 54 and 92miRNAs,***-three trans-acting loci are identified to affect the expression of nine myomi Rs(known muscle-specific miRNAs).MiRNAs in mammalian conserved miRNA clusters are found to be subjected to regulation by shared cis-e QTLs,while the expression of mature miRNA-5p/-3p counterparts is more likely to be regulated by different cis-e *** mapping and bioinformatics analyses pinpoint the peak cis-e SNP of mi R-4331-5p,rs344650810,which is located in its seed region,as a causal variant for the changes in expression and function of this ***,rs344650810 is significantly(P<0.01)correlated with the density and percentage of type I muscle ***,this study provides a comprehensive atlas of miRNA-e QTLs in porcine skeletal muscle and new insights into regulatory mechanisms of miRNA expression.

关键词： miRNA eQTL Pig Muscle Causal variant Regulatorymechanism

Heteroatom dopant strategy triggered high-potential plateau to non-graphitized carbon with highly disordered microstructure for high-performance sodium ion storage

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Journal of Energy Chemistry 2023年第4期79卷 192-200页

作者： Peilin Zhang Chen huang Mingzhen Xiu Siyu Zhu Weiwei Wang Bo Zhu Likang Qin yizhong huang Luyang Chen Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Energy Research Institute Interdisciplinary Graduate ProgrammeNanyang Technological UniversitySingapore

Non-graphitized carbon(NGC)has been extensively utilized as carbonaceous anode in sodium-ion batteries(SIBs).However,more optimization to achieve competitive capacity and stability is still challenging for *** the study,the dopant strategy is utilized to construct nitrogen/sulfur-doped non-graphitized carbon(N-NGC or S-NGC)shell decorated on three-dimensional graphene foam(GF)as a self-support *** highly disordered microstructures of heteroatom doped carbons are produced by applying a low-temperature pyrolysis treatment to precursors containing nitrogen and *** DFT calculations of Na-ion adsorption energies at diverse heteroatom sites show marginal-S,pyrrolic N and pyridinic N with more intensive Na-ion adsorption ability than middle-S,C=O and pristine *** N-NGC with dominant small graphitic regions delivers adsorption ability to Na-ion,while the S-NGC with significant single carbon lattice stripes demonstrates redox reaction with ***,in comparison with only adsorption-driven slope regions at high potential for N-NGC,the redox reaction-generated potentialplateau enables non-graphitized S-NGC superior discharge/charge capacity and cycle-stability in the slope *** work could provide deep insight into the rational design of non-graphitized carbon with rich microstructure and composition.

关键词： Non-graphitized carbon Highly disordered microstructure Heteroatom dopant Adsorption Redox reaction

212-kHz-linewidth,transform-limited pulses from a single-frequency Q-switched fiber laser based on a few-layer Bi_2Se_3 saturable absorber

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Photonics Research 2018年第10期6卷 I0031-I0037页

作者： WEIWEI LI JINHAI ZOU yizhong huang KAIJIE WANG TUANJIE DU SHUISEN JIANG ZHENGQIAN LUO Department of Electronic Engineering Xiamen University

Conventional Q-switched fiber lasers operating at multi-longitudinal-mode oscillation usually suffer from selfmode-locking-induced temporal instability, relatively strong noise, and low coherence. Here, we address the challenge through demonstrating, for the first time, to the best of our knowledge, a single-longitudinal-mode(SLM)Er-doped fiber(EDF) laser passively Q-switched by a few-layer Bi_2Se_3 saturable absorber(SA). The Bi_2Se_3 SA prepared by the liquid-phase exfoliation method shows a modulation depth of ～5% and saturation optical intensity of 1.8 MW∕cm^2. A section of 1-m unpumped EDF together with a 0.06-nm-bandwidth fiber Bragg grating is used as an ultra-narrow autotracking filter to realize SLM oscillation. Stable SLM Q-switching operation at 1.55 μm is successfully achieved with the spectral linewidth as narrow as 212 kHz and the pulse duration of2.54 μs, manifesting near-transform-limited pulses with a time-bandwidth product of 0.53. In particular, we found that the SLM Q-switching possesses the higher signal-to-noise ratios of 62 dB(optical) and 48 dB(radio frequency), exhibiting its advantages of low noise and high stability. Such an SLM Q-switched fiber laser could gain great interest for some applications in coherent detection, coherent optical communications, and high-sensitivity optical sensing.

关键词：光纤激光器通讯技术发展现状技术创新

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基于水热原理的厨余垃圾减量再利用装置

自动化应用 2024年第9期65卷 228-230页

作者：黄毅中左玉虎迟俊颜孙梦琪临沂大学机械与车辆工程学院山东临沂276000

提出了一种基于水热原理的环保型厨余垃圾处理装置。该装置利用粉碎机将垃圾细化,随后通过封闭反应器中的水热转化,在特定温度和压力作用下将有机物质分解为氨基酸、单糖和小分子脂肪酸等易溶的小分子物质。此过程显著减少了垃圾体积和... 详细信息

提出了一种基于水热原理的环保型厨余垃圾处理装置。该装置利用粉碎机将垃圾细化,随后通过封闭反应器中的水热转化,在特定温度和压力作用下将有机物质分解为氨基酸、单糖和小分子脂肪酸等易溶的小分子物质。此过程显著减少了垃圾体积和质量,且反应剩余的固体残留则可作肥料使用。该装置还配备了自动化控制系统,以优化反应条件,确保操作的简便性、安全性和可靠性。应用该装置有助于城市垃圾减量化、资源化和无害化,同时带来了显著的社会与环境效益。

关键词：厨余垃圾资源化利用水热原理减量化