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水系粘结剂对NCM811三元正极固态锂金属电池性能的影响

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材料科学与工程学报 2022年第6期40卷 923-928页

作者：顾钰婷佘圣贤洪子健黄玉辉吴勇军浙江大学材料科学与工程学院浙江杭州310027

以高能量密度的商用三元正极材料LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)为原料,分别采用油系PVDF和水系CMC两种粘结剂制备锂电池正极,并将其与PVDF-HFP/LLZTO复合固态电解质薄膜、金属锂负极组装成固态锂电池后进行综合性能测试。结... 详细信息

以高能量密度的商用三元正极材料LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)为原料,分别采用油系PVDF和水系CMC两种粘结剂制备锂电池正极,并将其与PVDF-HFP/LLZTO复合固态电解质薄膜、金属锂负极组装成固态锂电池后进行综合性能测试。结果表明,室温0.2 C倍率条件下,以水系CMC作粘结剂的电池比传统PVDF作粘结剂的电池具有更好的循环稳定性和更高的容量保持率,循环40次后放电比容量为137 mAh·g^(-1),容量保持率为90%。其良好的循环稳定性主要归因于CMC优异的粘结特性,正极中的活性物质不易发生脱落;但是其对应电池的放电比容量却相对降低了,主要原因是高镍正极材料与水溶液会发生化学反应,导致正极材料表面的活性锂含量降低,有待进一步的研究来改善其性能以满足商业化需求。

关键词：全固态锂电池复合电解质粘结剂三元正极材料

高镍三元正极材料LiNi0.8Co0.1Mn0.1O2的合成与改性

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青岛科技大学学报（自然科学版） 2020年第5期41卷 41-46页

作者：陈明峰袁徐俊佘圣贤黄晓笑宁波容百新能源科技股份有限公司电池材料研究院浙江余姚315400

LiNi0.8Co0.1Mn0.1O2是一种具有高能量密度的锂离子电池正极材料,但实际应用中的循环性能不佳、热稳定性差等缺陷亟待改善。本研究通过高温固相反应法制备了LiNi0.8-Co0.1Mn0.1O2材料,并采用H3BO3对其进行包覆改性。扫描电镜(SEM)显示... 详细信息

LiNi0.8Co0.1Mn0.1O2是一种具有高能量密度的锂离子电池正极材料,但实际应用中的循环性能不佳、热稳定性差等缺陷亟待改善。本研究通过高温固相反应法制备了LiNi0.8-Co0.1Mn0.1O2材料,并采用H3BO3对其进行包覆改性。扫描电镜(SEM)显示包覆热处理后正极材料表面形成了一层不均匀絮状包覆物,X射线光电子能谱(XPS)测试显示该包覆物为LiBO2和Li2B4O7的混合物。电化学测试表明包覆物有效减缓了循环过程中的阻抗增加,显著提升了正极材料的容量与循环性能,其中0.5%包覆的正极材料0.2 C首次放电容量达到195.9 mAh·g^-1,1 C循环100周后容量保持率达到88.7%。

关键词： LiNi0.8Co0.1Mn0.1O2 正极材料锂离子电池包覆改性

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距骨骨软骨损伤治疗方案的个性化组合

中国组织工程研究 2025年第21期29卷 4584-4592页

作者：陈学明佘昶无锡市第九人民医院(苏州大学附属无锡九院)足踝外科江苏省无锡市214000 苏州大学附属第二医院骨科江苏省苏州市215004

背景:距骨骨软骨损伤根据不同分型或临床症状,采取不同的治疗方法,包括保守治疗、手术治疗和生物制剂治疗。保守治疗大多可短时缓解症状和延缓病情;近年来关节镜下微骨折、克氏针钻孔、距骨软骨移植、自体骨软骨细胞移植、干细胞移植和... 详细信息

背景:距骨骨软骨损伤根据不同分型或临床症状,采取不同的治疗方法,包括保守治疗、手术治疗和生物制剂治疗。保守治疗大多可短时缓解症状和延缓病情;近年来关节镜下微骨折、克氏针钻孔、距骨软骨移植、自体骨软骨细胞移植、干细胞移植和生物制剂富血小板血浆等方法,都取得了不错的疗效。目的:对距骨骨软骨损伤的治疗进展进行总结,为其临床治疗提供参考。方法:第一作者以“talus,osteochondral lesions of the talus,微骨折,移植术,富血小板血浆,干细胞”为检索词,检索Pub Med数据库及中国知网2019年1月至2024年1月的相关文章。共纳入67篇文献进行综合分析。结果与结论:(1)目前治疗距骨骨软骨损伤的方式较多,对于Hepple分型Ⅰ和Ⅱ型病变保守康复治疗和生物制剂可缓解病情;Hepple分型Ⅲ型及以上且病变直径<15 mm选择微骨折或克氏针钻孔骨髓刺激治疗,但长期疗效不佳;更大病变面积选择置换和再生策略,移植失败是其最主要风险;(2)生物制剂治疗作为一种治疗新方式,多用于组合治疗;(3)针对距骨骨软骨损伤的治疗,需要考虑到软骨损伤的面积、部位等诸多因素,其治疗方案的选择还应考虑医疗技术开展情况以及患者接受程度、经济状况等因素,建议对各种方案进行个性化组合治疗,以取得更为良好的效果。

关键词：距骨距骨骨软骨损伤微骨折移植术富血小板血浆干细胞

3D打印技术辅助前交叉韧带重建治疗前交叉韧带断裂的研究

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中国疗养医学 2025年第1期34卷 109-112页

作者：王社光洛阳市孟津区中医院骨伤科河南洛阳471100

目的探讨关节镜下前交叉韧带(ACL)重建术治疗ACL断裂使用3D打印技术的辅助效果。方法选择2021年1月至2023年12月洛阳市孟津区中医院收治的102例ACL断裂患者,按照随机数字表分为3D打印组(n=51)和对照组(n=51)。对照组患者实施常规关节镜... 详细信息

目的探讨关节镜下前交叉韧带(ACL)重建术治疗ACL断裂使用3D打印技术的辅助效果。方法选择2021年1月至2023年12月洛阳市孟津区中医院收治的102例ACL断裂患者,按照随机数字表分为3D打印组(n=51)和对照组(n=51)。对照组患者实施常规关节镜下ACL重建术治疗,3D打印组行关节镜下3D打印技术辅助ACL重建术治疗。对比围术期指标、膝关节功能[国际膝关节主观功能评分(IKDC)、膝关节Lysholms评分]、膝关节活动范围、并发症。结果比较两组股骨骨隧道长度、住院时间,差异无统计学意义(P>0.05);相比于对照组,3D打印组手术时间短,差异有统计学意义(P<0.05);两组术后Lysholms评分、IKDC评分均高于术前,而3D打印组IKDC评分为(96.32±7.26)分、Lysholms评分为(94.25±3.85)分,高于对照组的(82.66±6.54)分、(88.20±8.25)分,差异有统计学意义(P<0.05);术后两组膝关节活动度均高于术前,而3D打印组膝关节活动度为(119.25±7.66)°,高于对照组的(98.66±8.22)°,差异有统计学意义(P<0.05);两组术后均无移植物断裂、移植物撞击、感染、深静脉血栓等并发症发生。结论关节镜下3D打印技术辅助ACL重建术治疗ACL断裂可缩短手术用时,改善患者膝关节活动度、膝关节功能,缩短住院时间,安全性较高。

关键词：前交叉韧带断裂关节镜前交叉韧带重建术 3D打印技术膝关节功能

Tracking Synchronization of Networked Lagrangian Systems via Impulsive Control and Its Applications

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Journal of Systems Science & Complexity 2019年第4期32卷 1093-1103页

作者： she Weiqiang MA Mihua Department of Public Teaching Zhangzhou Institute of TechnologyZhangzhou 363000China School of Mathematics and Statistics Minnan Normal UniversityZhangzhou 363000China

An impulsive control scheme is proposed to investigate the tracking synchronization of ring and inline networked Lagrangian *** a time-varying target trajectory,some algebraic synchronization criteria are derived to make the networked Lagrangian systems synchronize to the target trajectory.A distinctive feature of the proposed work is that the impulsive control scheme is used to investigate the highly nonlinear Lagrangian *** the impulsive control,each agent described by the Lagrangian system instantaneously interacts with its neighbors only at some discrete ***,the proposed control strategy requires only local coupling feedback for global *** a direct application of the obtained theoretical results,the tracking synchronization of multiple 3-DOF mobile robots is discussed in detail and *** results verify the effectiveness of the proposed control strategy.

关键词： Impulsive control mobile robots networked lagrangian systems tracking synchronization

Kepler's third law of n-body system

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Science China(Physics,Mechanics & Astronomy) 2018年第9期61卷 107-108页

作者： Zhen-Su she Department of Mechanics and Engineering Science Peking University

Newton＇s gravitational law and its derived Kapler＇s orbit of planetary motions are the very first triumph of science, which confirms that a purely human＇s invention of mathematics is able to accurately describe observations in nature. For the past three centuries, the frontier of science has moved to almost all areas of human experience, yet some basic problem in celestial mechanics has remained unsolved, despite the effort of many great minds like Newton （1687）, Euler （1760） and Lagrange （1776）, among others.

关键词：法律开普勒 Lagrange 系统身体 Euler 牛顿科学

Mechanism of methanol decomposition on the Pd/WC(0001) surface unveiled by first-principles calculations

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 1052-1064页

作者： Jinhua Zhang Yuanbin she College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China School of Materials and Environmental Engineering Chizhou UniversityChizhou 247000China

In this study,the decomposition of methanol into the CO and H species on the Pd/tungsten carbide(WC)(0001)surface is systematically investigated using periodic density functional theory(DFT)*** possible reaction pathways and intermediates are *** results reveal that saturated molecules,i.e.,methanol and formaldehyde,adsorb weakly on the Pd/WC(0001)*** CO and H prefer three-fold sites,with adsorption energies of-1.51 and-2.67 eV,*** the other hand,CH30 stably binds at three-fold and bridge sites,with an adsorption energy of-2.58 ***,most of the other intermediates tend to adsorb to the surface with the carbon and oxygen atoms in their sp3 and hydroxyl-like configurations,***,the Catom of CH2OH preferentially attaches to the top sites,CHOH and CH2O adsorb at the bridge sites,while COH and CHO occupy the three-fold *** DFT calculations indicate that the rupture of the initial C-H bond promotes the decomposition of CH3OH and CH2OH,whereas in the case of CHOH,O-H bond scission is favored over the C-H bond ***,the most probable methanol decomposition pathway on the Pd/WC(0001)surface is CH3OH→ CH2OH→trans-CUOH→CHO→*** present study demonstrates that the synergistic effect of WC(as carrier)and Pd(as catalyst)alters the CH3OH decomposition pathway and reduces the noble metal utilization.

关键词： density functional theory methanol direct methanol fuel cells WC(0001)-supported Pd monolayer decomposition mechanism

Thermal Stability of ALD Lanthanum Aluminate Thin Films on Si(100)

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Journal of Materials Science & Technology 2014年第4期30卷 347-352页

作者： Xiaofeng she Hongtao Wang Institute of Applied Mechanics Zhejiang University

The thermal stability of high-K dielectrics on Si is critical in avoiding the malfunction of metal oxide field effect transistors （MOSFET） in devices. Series of annealing experiments have been performed to investigate the thermal stability of atomic layer deposited （ALD） lanthanum aluminate （LAO） thin films, a promising amorphous high-K candidate. The abrupt interface between LAO and Si remains intact at temperatures below 600 ℃. Above this temperature, a SiO2-rich interfacial layer begins to appear and thickens at higher temperatures. At 900 ℃, the interface is roughened due to the formation of nano sized crystal nuclei above the interfacial layer, which indicates the interfacial reactions with the Si substrate. The thermal stability of ALD AI203 thin films on Si have also been studied under similar conditions. The AI203/Si interface retains its smoothness even after full crystallization. This comparison suggests that the rare earth element may catalyze the interfacial reactions. Further annealing experiments on LAO films with different thickness end with a capping layer show that the oxygen source of the interfacial layer mainly comes from the ALD oxide films.

关键词： Thermal stability High-K dielectric Atomic layer deposition Lanthanum aluminate

Fast consensus seeking for multi-agent systems

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Journal of Systems Engineering and Electronics 2011年第3期22卷 534-539页

作者： Yingying she Huajing Fang Department of Control Science and Engineering Huazhong University of Science and TechnologyWuhan 430074P.R.China

For multi-agent systems based on the local information,the agents automatically converge to a common consensus state and the convergence speed is determined by the algebraic connectivity of the communication *** study fast consensus seeking problems of multi-agent systems in undirected networks,a consensus protocol is proposed which considers the average information of the agents＇ states in a certain time interval,and a consensus convergence criterion for the system is *** on the frequency-domain analysis and algebra graph theory,it is shown that if the time interval is chosen properly,then requiring the same maximum control effort the proposed protocol reaches consensus faster than the standard consensus *** are provided to demonstrate the effectiveness of these theoretical results.

关键词： multi-agent systems consensus cooperative control convergence rate.