检索结果-南通市图书馆

Efficient Polytelluride Anchoring for Ultralong-Life Potassium Storage: Combined Physical Barrier and Chemisorption in Nanogrid-in-Nanofiber

引用

Nano-Micro Letters 2024年第4期16卷 364-378页

作者： Qinghua Li Dandan Yu Jian Peng Wei Zhang Jianlian huang Zhixin Liang Junling Wang Zeyu Lin Shiyun Xiong jiazhao Wang Shaoming huang Guangzhou Key Laboratory of Low‑Dimensional Materials and Energy Storage Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2522Australia

Metal tellurides(MTes) are highly attractive as promising anodes for high-performance potassium-ion batteries. The capacity attenuation of most reported MTe anodes is attributed to their poor electrical conductivity and large volume variation. The evolution mechanisms, dissolution properties, and corresponding manipulation strategies of intermediates(K-polytellurides, K-pTe_(x)) are rarely mentioned. Herein,we propose a novel structural engineering strategy to confine ultrafine CoTe_(2) nanodots in hierarchical nanogrid-in-nanofiber carbon substrates(CoTe_(2)@NC@NSPCNFs) for smooth immobilization of K-pTe_(x) and highly reversible conversion of CoTe_(2) by manipulating the intense electrochemical reaction process. Various in situ/ex situ techniques and density functional theory calculations have been performed to clarify the formation, transformation, and dissolution of K-pTe_(x)(K_(5)Te_(3) and K_(2)Te), as well as verifying the robust physical barrier and the strong chemisorption of K_(5)Te_(3) and K_(2)Te on S, N co-doped dual-type carbon substrates. Additionally, the hierarchical nanogrid-in-nanofiber nanostructure increases the chemical anchoring sites for K-pTe_(x), provides sufficient volume buffer space, and constructs highly interconnected conductive microcircuits, further propelling the battery reaction to new heights(3500 cycles at 2.0 A g^(-1)). Furthermore, the full cells further demonstrate the potential for practical applications. This work provides new insights into manipulating K-pTe_(x) in the design of ultralong-cycling MTe anodes for advanced PIBs.

关键词： Polytelluride dissolution Nanogrid-in-nanofiber structure Physicochemical adsorption Reaction mechanism Ultralonglife potassium storage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Universal architecture and defect engineering dual strategy for hierarchical antimony phosphate composite toward fast and durable sodium storage

引用

Journal of Energy Chemistry 2024年第3期90卷 110-119,I0004页

作者： Jiawei Wu Gaoyu Wang Wei Zhang Lixiang Wang Jian Peng Qinghua Li Zhixin Liang Wenbo Fan jiazhao Wang Shaoming huang School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006GuangdongChina School of Mechanical and Electrical Engineering Jiaxing Nanhu UniversityJiaxing 314001ZhejiangChina Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW2522Australia

Antimony(Sb)-ba sed anode materials are feasible candidates for sodium-ion batteries(SIBs) due to their high theoretical specific capacity and excellent electrical conductivity.However,they still suffer from volume distortion,structural collapse,and ionic conduction interruption upon cycling.Herein,a hierarchical array-like nanofiber structure was designed to address these limitations by combining architecture engineering and anion tuning strategy,in which SbPO_(4-x) with oxygen vacancy nanosheet arrays are anchored on the surface of interwoven carbon nanofibers(SbPO_(4-x)@CNFs).In particular,bulky PO_(4)^(3-) anions mitigate the large volume distortion and generate Na_(3)PO_(4) with high ionic conductivity,collectively improving cyclic stability and ionic transport efficiency.The abundant oxygen vacancies substantially boost the intrinsic electronic conductivity of SbPO_4,further accelerating the reaction dynamics.In addition,hierarchical fibrous structures provide abundant active sites,construct efficient conducting networks,and enhance the electron/ion transport capacity.Benefiting from the advanced structural design,the SbPO_(4-x)@CNFs electrodes exhibit outstanding cycling stability(1000 cycles at 1.0 A g^(-1) with capacity decay of 0.05% per cycle) and rapid sodium storage performance(293.8 mA h g^(-1) at 5.0 A g^(-1)).Importantly,systematic in-/ex-situ techniques have revealed the "multi-step conversion-alloying" reaction process and the "battery-capacitor dual-mode" sodium-storage mechanism.This work provides valuable insights into the design of anode materials for advanced SIBs with elevated stability and superior rate performance.

关键词： SbPO_(4) anodes Hierarchical nanostructures Oxygen vacancy Stress dispersion Sodium-ion batteries

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chemical-vapor-deposition-grown 2D transition metal dichalcogenides:A generalist model for engineering electrocatalytic hydrogen evolution

引用

Nano Research 2023年第1期16卷 101-116页

作者： Yang Zhao jiazhao huang Jianqiang Chen Youwen Liu Tianyou Zhai State Key Laboratory of Materials Processing and Die&Mould Technology and School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Two-dimensional(2D)transition metal dichalcogenides(TMDs)have proved to possess exceptional catalytic performance for hydrogen evolution and are considered to be an appropriate substitute for commercial Pt-based catalysts.Experimentally,chemical vapor deposition(CVD)is an extremely important technique for acquiring controllable and high-purity TMDs for electrocatalysis and modern electronic devices.Recently,researchers have made significant achievements in synthesizing TMDs used for electrocatalytic hydrogen evolution by CVD ranging from dynamic mechanism exploration to performance optimization.In this review,we present the recent progress based on electrocatalytic hydrogen evolution implemented by CVDgrowth TMDs nanosheets and unveil the structural–activity correlation.Firstly,in synthesis,diverse factors covering precursor,substrate,temperature settings,and atmosphere will affect the quality and surface morphology of TMDs.Then,we present the current research status of the CVD-grown 2D TMDs for engineering electrocatalytic hydrogen evolution,including intrinsic performance exploring,morphology engineering,composition adjusting,phase engineering,and vertically-oriented structure constructing.Finally,the future prospects and challenges of CVD in 2D TMDs electrocatalysis are provided.

关键词： chemical vapor deposition two-dimensional(2D)transition metal dichalcogenides electrochemistry hydrogen evolution on-chip electrocatalysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sisyphus effects in hydrogen electrochemistry on metal silicides enabled by silicene subunit edge

引用

Science Bulletin 2019年第9期64卷 617-624页

作者： Zechao Zhuang Yong Li jiazhao huang Zilan Li Kangning Zhao Yunlong Zhao Lin Xu Liang Zhou Lyudmila V. Moskaleva Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of Bremen Advanced Technology Institute University of Surrey Department of Chemistry University of the Free State

Nonmetal elements strictly govern the electrochemical performance of molybdenum compounds.Yet,the exact role played by nonmetals during electrocatalysis remains largely obscure.With intermetallic MoSi_2comprising silicene subunits,we present an unprecedented hydrogen evolution reaction(HER)behavior in aqueous alkaline solution.Under continuous operation,the HER activity of MoSi_2shows a more than one order of magnitude improvement in current density from 1.1 to 21.5 mA cm^(à2)at 0.4 V overpotential.Meanwhile,this activation behavior is highly reversible,such that voltage withdrawal leads to catalyst inactivation but another operation causes reactivation.Thus,the system shows dynamics strikingly analogous to the legendary Sisyphus’labor,which drops and recovers in a stepwise manner repeatedly,but never succeeds in reaching the top of the mountain.Isomorphic WSi_2behaves almost the same as MoSi_2,whereas other metal silicides with silicyne subunits,including CrSi_2and TaSi_2,do not exhibit any anomalous behavior.A thin amorphous shell of MoSi_2is observed after reaction,within which the Si remains partially oxidized while the oxidation state of Mo is basically unchanged.First-principles calculations further reveal that the adsorption of hydroxide ions on silicene subunit edges and the subsequent Si vacancy formation in MoSi_2jointly lead to the anomalous HER kinetics of the adjacent Mo active centers.This work demonstrates that the role of nonmetal varies dramatically with the electronic and crystallographic structures of silicides and that silicene structural subunit may serve as a promoter for boosting HER in alkaline media.

关键词： Sisyphus effect Electrochemistry Metal silicides Silicene subunit Hydrogen evolution reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于G1法和云化物元模型的充填体稳定性评价

引用

矿业研究与开发 2024年第1期44卷 13-18页

作者：黄旭叶聪林陈家钊谭玉叶北京科技大学土木与资源学院北京100083 武钢资源集团大冶铁矿有限公司湖北黄石市435006 金属矿山高效开采与安全教育部重点实验室北京100083

充填体是矿山充填开采的关键采场结构,其稳定性评判对矿山生产安全具有重要意义。针对目前充填体稳定性评价方法存在的模糊性和随机性的特点,提出了充填体稳定性综合评价方法。采用序关系分析法(G1法)和云化物元模型构建了充填体稳定性... 详细信息

充填体是矿山充填开采的关键采场结构,其稳定性评判对矿山生产安全具有重要意义。针对目前充填体稳定性评价方法存在的模糊性和随机性的特点,提出了充填体稳定性综合评价方法。采用序关系分析法(G1法)和云化物元模型构建了充填体稳定性综合评价模型,以大冶铁矿某充填体为工程背景,采用G1法确定指标权重,利用MATLAB计算单指标的云关联度及综合评价向量,由最大隶属度原则确定大冶铁矿充填体的稳定性等级。研究结果表明:采用充填体稳定性评价方法评价的充填体稳定性等级与实际情况相符,可为深部金属矿山充填体稳定性评价提供新思路及新方法。

关键词：充填体稳定性 G1法云化物元模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Boron leaching:Creating vacancy-rich Ni for enhanced hydrogen evolution

引用

Nano Research 2022年第3期15卷 1868-1873页

作者： Chao Han Weijie Li jiazhao Wang Zhenguo huang School of Civil and Environmental Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneyNSW 2007Australia Institute for Superconducting&Electronic Materials AIIM BuildingInnovation CampusUniversity of WollongongSquires WayNorth WollongongNSW 2500Australia Centre for Green Technology Faculty of Engineering and Information TechnologyUniversity of Technology SydneyNSW 2007Australia

Creating vacancy is often highly effective in enhancing the hydrogen evolution performance of transition metal-based catalysts.Vacancy-rich Ni nanosheets have been fabricated via topochemical formation of two-dimentional(2D)Ni_(2)B on graphene precursor followed by boron leaching.Anchored on graphene,a few atomic layered Ni_(2)B nanosheets are first obtained by reduction and annealing.Large number of atomic vacancies are then generated in the Ni_(2)B layer via leaching boron atoms.When used for hydrogen evolution reaction(HER),the vacancy-rich Ni/Ni(OH)_(2 )heterostructure nanosheets demonstrate remarkable performance with a low overpotential of 159 mV at a current density of 10 mA·cm^(−2) in alkaline solution,a dramatic improvement over 262 mV of its precursor.This enhancement is associated with the formation of vacancies which introduce more active sites for HER along Ni/Ni(OH)_(2) heterointerfaces.This work offers a facile and universal route to introduce vacancies and improve catalytic activity.

关键词： two-dimensional structure Ni_(2)B boron leaching vacancies hydrogen evolution reaction(HER)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

血清SF、HbA1c水平对妊娠期糖尿病孕妇围产结局的预测价值

引用

国际检验医学杂志 2024年第10期45卷 1243-1247页

作者：侯莎黄艳英李佳钊赖梅梅邛崃市妇幼保健院检验科四川成都611530 成都市妇女儿童中心医院检验科四川成都610073

目的探讨血清铁蛋白(SF)、糖化血红蛋白(HbA1c)水平对妊娠期糖尿病(GDM)孕妇发生不良围产结局的预测价值。方法选取2021年3月至2023年2月于邛崃市妇幼保健院(下称该院)行产前检查并住院分娩的GDM孕妇97例为观察组,另选取同期于该院产... 详细信息

目的探讨血清铁蛋白(SF)、糖化血红蛋白(HbA1c)水平对妊娠期糖尿病(GDM)孕妇发生不良围产结局的预测价值。方法选取2021年3月至2023年2月于邛崃市妇幼保健院(下称该院)行产前检查并住院分娩的GDM孕妇97例为观察组,另选取同期于该院产检的健康孕妇116例为对照组。比较两组的空腹血糖(FBG)、SF、HbA1c水平,对比分析观察组中不同围产结局孕妇的临床特征以及SF、HbA1c水平,分析GDM孕妇不良围产结局的影响因素以及血清SF、HbA1c水平预测GDM孕妇不良围产结局的价值。结果观察组的FBG、总胆固醇(TG)、三酰甘油(TC)、低密度脂蛋白胆固醇(LDL-C)、SF、HbA1c水平均高于对照组,差异有统计学意义(P<0.05)。GDM孕妇中围产结局不良组的FBG、TG、TC、SF、HbA1c水平高于良好组,差异有统计学意义(P<0.05)。多因素Logistic回归分析显示,FBG、TG、TC、SF、HbA1c是不良围产结局的独立影响因素(P<0.05)。受试者工作特征(ROC)曲线分析结果显示,SF、HbA1c及二者联合预测曲线下面积(AUC)分别为0.741(95%CI:0.638~0.844)、0.685(95%CI:0.570~0.800)、0.874(95%CI:0.797~0.951)。结论 SF、HbA1c在GDM孕妇体内呈高表达,SF联合HbA1c对GDM孕妇围产结局具有一定的预测价值。

关键词：血清铁蛋白糖化血红蛋白妊娠期糖尿病围产结局预测

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

下一代互联网绿色节能解决方案

引用

邮电设计技术 2024年第4期 39-45页

作者：罗家尧方遒铿余金波古渊桦黄家兆中国联通广东分公司广东广州510000

随着5G网络的迅猛发展,运营商网络能耗也随之快速增长,如何在保障网络服务质量前提下降低网络功耗和运营成本,成为运营商亟需解决的问题。分析了运营商2代网络设备的能耗和流量带宽的发展趋势,从单机节能、管理节能、网络架构节能3个维... 详细信息

随着5G网络的迅猛发展,运营商网络能耗也随之快速增长,如何在保障网络服务质量前提下降低网络功耗和运营成本,成为运营商亟需解决的问题。分析了运营商2代网络设备的能耗和流量带宽的发展趋势,从单机节能、管理节能、网络架构节能3个维度探讨了下一代互联网降低能耗的绿色节能方案,并在运营商网络中对单机节能方案做了试点测试。

关键词：绿色节能单机节能管理节能网络架构节能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deep Segmentation Feature-Based Radiomics Improves Recurrence Prediction of Hepatocellular Carcinoma

引用

Biomedical Engineering Frontiers 2022年第1期3卷 126-137页

作者： Jifei Wang Dasheng Wu Meili Sun Zhenpeng Peng Yingyu Lin Hongxin Lin jiazhao Chen Tingyu Long Zi-Ping Li Chuanmiao Xie Bingsheng huang Shi-Ting Feng Department of Radiology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Medical AI Lab School of Biomedical EngineeringHealth Science CentreShenzhen UniversityShenzhenChina Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions ShenzhenChina Department of Medical Imaging and Interventional Radiology Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhouChina

Objective and Impact Statement.This study developed and validated a deep semantic segmentation feature-based radiomics(DSFR)model based on preoperative contrast-enhanced computed tomography(CECT)combined with clinical information to predict early recurrence(ER)of single hepatocellular carcinoma(HCC)after curative resection.ER prediction is of great significance to the therapeutic decision-making and surveillance strategy of HCC.Introduction.ER prediction is important for HCC.However,it cannot currently be adequately determined.Methods.Totally,208 patients with single HCC after curative resection were retrospectively recruited into a model-development cohort(n=180)and an independent validation cohort(n=28).DSFR models based on different CT phases were developed.The optimal DSFR model was incorporated with clinical information to establish a DSFR-C model.An integrated nomogram based on the Cox regression was established.The DSFR signature was used to stratify high-and low-risk ER groups.Results.A portal phase-based DSFR model was selected as the optimal model(area under receiver operating characteristic curve(AUC):development cohort,0.740;validation cohort,0.717).The DSFR-C model achieved AUCs of 0.782 and 0.744 in the development and validation cohorts,respectively.In the development and validation cohorts,the integrated nomogram achieved C-index of 0.748 and 0.741 and time-dependent AUCs of 0.823 and 0.822,respectively,for recurrence-free survival(RFS)prediction.The RFS difference between the risk groups was statistically significant(P<0.0001 and P=0.045 in the development and validation cohorts,respectively).Conclusion.CECT-based DSFR can predict ER in single HCC after curative resection,and its combination with clinical information further improved the performance for ER prediction.

关键词： Carcinoma signature Deep

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on the Magnetic Shielding Composite Coating in Low Frequency

Study on the Magnetic Shielding Composite Coating in Low Fre...

引用

2002 3rd International Symposium on Electromagnetic Compatibility

作者： GUAN Denggao huang Wanxia CHEN jiazhao TU Mingjing Department of metal materials College of Materials Science and EngineeringSichuan University

ISBN: (纸本)0780372778

＜正＞A new type of magnetic shielding coatings in low frequency（f≤20KHz） was made.The fillers of the coating were compound.They were made of non-crystal magnetic powder,micron Ni powder and magnetic fibre. The agglomerant of the coating was acrylic resin.The coating was gained after surface treating,mixing,milling, grinding,filtrating techniques.The maximum magnetic shielding effectiveness of the coating is 14～15dB.The coating is low in cost,and convenient for application.The coating can reduce magnetic radiation pollution.We first found that the magnetic shielding in low frequency could be realized with the form of the coating.

关键词： Composite coatings

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：