检索结果-南通市图书馆

Single-Crystal Nickel-Based Cathodes:Fundamentals and Recent Advances

在线全文

学校读者我要写书评

暂无评论

Electrochemical Energy Reviews 2022年第4期5卷 63-103页

作者： Shi-jie Lu Lin-bo Tang han-xin wei Ying-de Huang Cheng Yan Zhen-jiang He Yun-jiao Li Jing Mao Kehua Dai Jun-chao Zheng School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina School of Mechanical Medical and Process EngineeringQueensland University of TechnologyBrisbaneQLD 4001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina College of Chemistry Tianjin Normal UniversityTianjin 300387China

Lithium-ion batteries(LIBs)represent the most promising choice for meeting the ever-growing demand of society for various electric applications,such as electric transportation,portable electronics,and grid ***-rich layered oxides have largely replaced LiCoO_(2)in commercial batteries because of their low cost,high energy density,and good *** nickel-based oxide particles,usually called polycrystal materials,are composed of microsized primary ***,polycrystal particles tend to suffer from pulverization and severe side reactions along grain boundaries during *** phenomena accelerate cell ***-crystal materials,which exhibit robust mechanical strength and a high surface area,have great potential to address the challenges that hinder their polycrystal counterparts.A comprehensive understanding of the growing body of research related to single-crystal materials is imperative to improve the performance of cathodes in *** review highlights origins,recent developments,challenges,and opportunities for single-crystal layered oxide *** synthesis science behind single-crystal materials and comparative studies between single-crystal and polycrystal materials are discussed in *** techniques and facilities are also reviewed in combination with our group’s experiences in single-crystal *** development should focus on facile production with strong control of the particle size and distribution,structural defects,and impurities to fully reap the benefits of single-crystal materials.

关键词： Lithium-ion battery Cathode materials Single crystal Nickel-based layered oxides

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

李雅普诺夫矩阵方程的求解公式

天津大学学报（自然科学与工程技术版） 2001年第3期34卷 408-409页

作者：韩维信天津大学理学院天津300072

以线性矩阵方程 AX=B的理论为基础 ,给出李雅普诺夫矩阵方程 ATX+X A=- E的求解公式 .

关键词：李雅普诺夫矩阵方程通解矩阵控制论线性矩阵方程求解公式初等行变换

Enhancing structure and cycling stability of Ni-rich layered oxide cathodes at elevated temperatures via dual-function surface modification

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第12期75卷 301-309,I0008页

作者： Ying-De Huang han-xin wei Pei-Yao Li Yu-Hong Luo Qing Wen Ding-Hao Le Zhen-Jiang He Hai-Yan Wang You-Gen Tang Cheng Yan Jing Mao Ke-Hua Dai Xia-Hui Zhang Jun-Chao Zheng School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083HunanChina School of Mechanical Medical and Process EngineeringQueensland University of TechnologyBrisbane 4001QueenslandAustralia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina College of Chemistry Tianjin Normal UniversityTianjin 300387China School of Mechanical and Materials Engineering Washington State UniversityPullman 99164WashingtonUSA

High-nickel single-crystal layered oxide material has become the most promising cathode material for electric vehicle power battery due to its high energy ***,this material still suffers from structural degradation during cycling and especially the severe interfacial reactions at elevated temperatures that exacerbate irreversible capacity ***,a simple strategy was used to construct a dualfunction Li_(1.5)Al_(0.5)Ge_(1.5)P_(3)O_(12)(LAGP)protective layer on the surface of the high-nickel single-crystal(SC)cathode material,leading to SC@LAGP *** strong Al-O bonding effectively inhibits the release of lattice oxygen(O)at elevated temperatures,which is supported by the positive formation energy of O vacancy from first-principal ***,theoretical calculations demonstrate that the appropriate amount of Al doping accelerates the electron and Li^(+)transport,and thus reduces the kinetic *** addition,the LAGP protective layer alleviates the stress accumulation during cycling and effectively reduces the erosion of materials from the electrolyte decomposition at elevated *** obtained SC@LAGP cathode material demonstrates much enhanced cycling stability even at high voltage(4.6 V)and elevated temperature(55℃),with a high capacity retention of 91.3%after 100 *** work reports a simple dual-function coating strategy that simultaneously stabilizes the structure and interface of the single-crystal cathode material,which can be applied to design other cathode materials.

关键词： Lithium-ion battery Ni-rich cathode Dual-function coating Single-crystalline Elevated temperature

Microwave ablation： results in ex vivo and in vivo porcine livers with 2450-MHz cooled-shaft antenna

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2011年第20期124卷 3386-3393页

作者： ZHOU Qi JINxing JIAO De-chao ZhanG Fu-jun ZhanG Liang han xin-wei DUAN Guang-feng han Jian-jun LI Chuan-xing Department of Hepatobiliary Surgery First Affiliated Hospital Sun Yat-sen University Guangzhou Guangdong 510080 China Department of Interventional Radiology Fourth Hospital of Jilin University Changchun Jilin 130021 China Department of Interventional Radiology First Affiliated Hospital of Zhengzhou University Zhengzhou Henan 450052 China Department of Imaging and Interventional Radiology Cancer Center and State Key Laboratory of Oncology in South China Sun Yat-sen University Guangzhou Guangdong 510060 China

Background Imaging-guided thermal ablation using different energy sources continues to gain favor as a minimally invasive technique for the treatment of primary and metastatic hepatic malignant tumors. This study aimed to evaluate the performance of microwave ablation with 2450-MHz internally cooled-shaft antenna in ex vivo and in vivo porcine livers. Methods All studies were animal care and ethics committee approved. Microwave ablation was performed using a noncooled or cooled-shaft antenna in 23 ex vivo （92 ablations） and eight in vivo （36 ablations） porcine livers. Diameters of the coagulation zone were observed on gross specimens. The coagulation diameters achieved in different microwave ablation parameter groups were compared. Curve estimation analysis was performed to characterize the relationship between applied power and treatment duration and coagulation diameter （including short-axis and long-axis diameter）. Results Coagulation zones were elliptical and an arrowed-shaped carbonization zone around the shaft was observed in all groups. But the antenna track was also coagulated in the noncooled-shaft antenna groups. In ex vivo livers, the short-axis diameter correlated with the power output in a quadratic curve fashion （R2=0.95） by fixing ablation duration to 10 minutes, and correlated with the ablation duration in a logarithmic curve fashion （R2=0.98） by fixing power output to 80 W. The short-axis reached a relative plateau within 25 minutes. In in vivo livers, short-axis diameter correlated with the coagulation duration in a sigmoidal curve fashion （60 W group R2=0.76, 80 W group R2=0.87）, with a relative plateau achieved within 10 minutes for power settings of 60 W and 80 W. Conclusions The internally cooled microwave antenna may be advantageous to minimize collateral damage. The short-axis diameter enlargement has a plateau by fixing power output.

关键词： animals experimental study liver microwave ablation

Diagnosis and treatment of superior mesenteric artery compression syndrome complicated with gastroesophageal reflux disease

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2021年第11期134卷 1382-1384页

作者： Rui Zhang Zhi-Tong Li xin-wei han Li-Dan Liang Zhong-Gao Wang Feng Ji Department of Respiratory and Critical Care Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhou UniversityZhengzhouHenan 450052China Department of Intervention The First Affiliated Hospital of Zhengzhou UniversityZhengzhou UniversityZhengzhouHenan 450052China Department of Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou UniversityZhengzhouHenan 450052China.

To the Editor:Superior mesenteric artery compression syndrome(SMAS)is a relatively rare disease caused by the narrowing of the angle between the abdominal aorta and the superior mesenteric artery,thus compressing the third segment of the duodenum.[1]SMAS is mainly characterized by post-prandial epigastric pain,abdominal distension,nausea,vomiting,anorexia,and weight *** approaches,including nutritional support,are effective,although approximately 75%of patients still require surgical treatment.[2]

关键词： artery nausea vomiting

Bronchial stump fistula:treatment with covered retrievable hinged metallic stents-preliminary clinical experience

在线全文

学校读者我要写书评

暂无评论

介入放射学杂志 2007年第4期16卷 253-257页

作者： LI Yong-dong han xin-wei WU Gang LI Ming-hua Department of Radiology The Sixth Affiliated People＇s Hospital Shanghai Jiaotong University Shanghai 200233 China Department of Radiology The Sixth Affiliated People＇s Hospital Shanghai Jiaotong University200233 Department of Radiology the First Affiliated Hospital Zhengzhou University Zhengzhou Henan Province Department of Radiology the First Affiliated Hospital Zhengzhou University Zhengzhou Henan Province

Objective To evaluate the preliminaily clinical efficacy and retrievability of a retrievable hinged covered metallic stent in the treatment of the bronchial stump fistula(BSF).Methods Between April 2003 and March 2005,8 patients with bronchial stump fistula after pneumonectomy or lobectomy were treated with two types(A and B) of retrievable hinged covered metallic *** A stent was placed in 6 patients and type B in 2 under fluoroscopic *** stent was removed with a retrieval set when BSF was healed or complications *** Stent placement in the bronchial tree was technically successful in all patients,without procedure-related *** closure of the BSF was achieved in all patients after the *** were removed from all patients but *** of the stents was difficult in two patients due to tissue *** were followed up for 6-21 *** of the stents remained stable in all patients except one due to severe *** closure of BSF was achieved in 7(87.5%) of 8 *** Use of a retrievable hinged covered expandable metallic stent is a simple,safe,and effective procedure for closure of the *** of the stent seems to be feasible.(J Intervent Radiol,2007,16:253-257)

关键词：瘘管肺栓塞食管良性计算机体层摄影支气管胸膜痿治疗

Revealing proton-coupled exchange mechanism in aqueous ion-exchange synthesis of nickel-rich layered cathodes for lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

eScience 2024年第4期4卷 103-109页

作者： Yu-Hong Luo Qing-Lin Pan han-xin wei Ying-De Huang Pei-Yao Li Lin-Bo Tang Zhen-Yu Wang Cheng Yan Jing Mao Ke-Hua Dai Qing Wu Xia-Hui Zhang Jun-Chao Zheng School of Materials Science and Engineering Central South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China School of Mechanical Medical and Process EngineeringQueensland University of TechnologyBrisbane 4001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China College of Chemistry Tianjin Normal UniversityTianjin 300387China School of Information and Network Center Central South University Changsha 410083China

Ion exchange is a promising synthetic method for alleviating severe cation mixing in traditional layered oxide materials for lithium-ion batteries,leading to enhanced structural ***,the underlying mechanisms of ion exchange are still not fully *** a fundamental study of the ion-exchange mechanism is needed for achieving the controllable synthesis of layered oxides with a stable ***,we thoroughly unearth the underlying mechanism that triggers the ion exchange of Ni-rich materials in aqueous solutions by examining time-resolved structural evolution combined with theoretical *** results reveal that the reaction pathway of ion exchange can be divided into two steps:protonation and *** proton is the key to achieving charge balance in the ion exchange process,as revealed by X-ray adsorption spectroscopy and inductive coupled plasma *** addition,the intermediate product shows high lattice distortion during ion exchange,but it ends up with a most stable product with high lattice *** apparent discrepancies in lattice energy between materials before and after ion exchange emphasize the importance of synthetic design in structural *** work provides new insights into the ion-exchange synthesis of Ni-rich oxide materials,which advances the development of cathode materials for high-performance lithium-ion batteries.

关键词： Ion exchange Reaction mechanisms Proton-coupledNi-rich oxides Protonation Lithiation Lithium-ion batteries

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

不确定非线性系统的L_∞观测器

控制理论与应用 2019年第5期36卷 705-710页

作者：韩渭辛王振华沈毅哈尔滨工业大学航天学院

针对具有参数不确定性和未知干扰的Lipschitz非线性系统,提出了一种L∞观测器设计方法.在未知干扰有界的假设下,基于Lyapunov稳定性理论给出了误差系统满足L∞性能指标的设计条件,并将其转化为方便求解的线性矩阵不等式形式.所提出的L... 详细信息

针对具有参数不确定性和未知干扰的Lipschitz非线性系统,提出了一种L∞观测器设计方法.在未知干扰有界的假设下,基于Lyapunov稳定性理论给出了误差系统满足L∞性能指标的设计条件,并将其转化为方便求解的线性矩阵不等式形式.所提出的L∞观测器不仅具有峰值到峰值形式的干扰抑制性能,而且能够给出估计误差的实时范围.最后,通过一个单连杆机械臂的仿真算例验证了所提出方法的有效性.

关键词：非线性系统 L∞观测器参数不确定性峰值到峰值增益干扰抑制

经皮肝穿刺胆道造影诊断胰胆管合流异常的价值

在线全文

学校读者我要写书评

暂无评论

中华放射学杂志 2008年第8期42卷 797-801页

作者：韩新巍李臻吴刚郑州大学第一附属医院放射科河南省高校临床医学重点开放实验室 450052

目的探讨经皮肝穿刺胆道造影（PTC）诊断胰胆管合流异常（PBM）的临床价值及可行性，总结其影像特征。方法回顾性分析连续的363例因阻塞性黄疸PTC下行介入治疗患者的临床及影像资料，并根据病例入选标准筛选出资料完整、胰管显影的病例... 详细信息

目的探讨经皮肝穿刺胆道造影（PTC）诊断胰胆管合流异常（PBM）的临床价值及可行性，总结其影像特征。方法回顾性分析连续的363例因阻塞性黄疸PTC下行介入治疗患者的临床及影像资料，并根据病例入选标准筛选出资料完整、胰管显影的病例。通过影像测量胆胰共同管长度、直径，汇合处胰胆管直径、汇合角度等，并经校正得到实际数值，结合PBM诊断标准进行诊断。采用t检验比较测量值与正常值有无统计学意义，采用独立样本秩和检验分析测量的胆胰共同管长度、汇合角度与十二指肠乳头位置的关系。结果本组病例根据PTC结果共确诊PBM38例，检出率为10．5％（38／363）；PBM患者共同管长度为（12．6±7．9）mm，明显高于正常的6mm（t=5．15，P〈0．05）。汇合处胆总管直径、胰管直径、共同管直径分别为（3．7±1．9）、（2．4±1．3）、（3．3±1．4）mm，与正常值（分别为6、3、2mm）比较差异无统计学意义（t值分别为1．79、2．85、5．72，P值均〉0．05）。十二指肠乳头开口于降部中段1／3部位15例，共同管长度为（10．6±9．1）mm，汇合角度51．1°±28．0°；异常开口组：降部下1／3段10例、交界处8例、水平部5例，共同管长度分别为（9．9±3．7）、（18．6±8，9）、（13．9±3．5）mm，汇合角度分别为54．0。±18．6。、48．7。±12．6。、74．4°±18．5°。十二指肠乳头部位不同的患者间，共同管长度差异有统计学意义（X^2=14．51，P〈0．05），乳头部位距壶腹部越远，共同管越长。结论PTC诊断PBM安全、可行，并具有一定的特征性。

关键词：成像,三维穿刺术胆管造影术诊断胰胆管合流异常