检索结果-南通市图书馆

A surfactant-modified composite separator for high safe lithium ion battery

Journal of Energy Chemistry 2023年第1期76卷 398-403,I0010页

作者： botao yuan Niandong He Yifang Liang Liwei Dong Jipeng Liu Jiecai Han Weidong He yuanpeng Liu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080HeilongjiangChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080HeilongjiangChina Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China

Separators have been gaining increasing attention to improve the performance of lithium ion batteries(LIBs),especially for high safe and long cycle ***,commercial polyolefin separators still face the problems of rapid capacity decay and safety issues due to the poor wettability with electrolytes and low thermal ***,a novel composite separator is proposed by introducing a surfactant of sodium dodecyl thiosulfate(SDS)into the polytetrafluoroethylene(PTFE)substrate with the binder of polyacrylic acid(PAA)through the suction filtration *** introduction of PAA/SDS enhances the adsorption energy between PTFE substrate and electrolyte through density functional theory calculations,which improves wettability and electrolyte uptake of the separator *** asachieved composite separator enables the LIBs to own high Li^(+)conductivity(0.64×10^(-3)S cm^(-1))and Li^(+)transference number(0.63),further leading to a high capacity retention of 93.50%after 500 cycles at 1 *** addition,the uniform and smooth surface morphology of Li metal employed the composite separator after cycling indicates that the lithium dendrites can be successfully *** work indicates a promising route for the preparation of a novel composite separator for high safe LIBs.

关键词： Composite separator PTFE Surfactant High safe Lithium 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

Electrolyte Engineering for High-Voltage Lithium Metal Batteries

引用

Research 2022年第4期2022卷 781-832页

作者： LiweiDong Shijie Zhong botao yuan yuanpeng Ji Jipeng Liu yuanpeng Liu Chunhui Yang Jiecai Han Weidong He MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu610106China

High-voltage lithium metal batteries(HVLMBs)have been arguably regarded as the most prospective solution to ultrahigh-density energy storage devices beyond the reach of current ***,the only component inside the HVLMBs in contact with both aggressive cathode and Li anode,is expected to maintain stable electrode/electrolyte interfaces(EEIs)and facilitate reversible Li+***,traditional electrolytes with narrow electrochemical windows fail to compromise the catalysis of high-voltage cathodes and infamous reactivity of the Li metal anode,which serves as a major contributor to detrimental electrochemical performance fading and thus impedes their practical *** stable electrolytes is vital for the further development of ***,optimization principles,design strategies,and future perspectives for the electrolytes of the HVLMBs have not been summarized in *** review first gives a systematical overview of recent progress in the improvement of traditional electrolytes and the design of novel electrolytes for the *** strategies of conventional electrolyte modification,including high concentration electrolytes and CEI and SEI formation with additives,are *** electrolytes including fluorinated,ionic-liquid,sulfone,nitrile,and solid-state electrolytes are also *** addition,theoretical studies and advanced characterization methods based on the electrolytes of the HVLMBs are probed to study the internal mechanism for ultrahigh stability at an extreme *** also foresees future research directions and perspectives for further development of electrolytes in the HVLMBs.

关键词： electrolyte maintain summarized

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

A Single-Layer Piezoelectric Composite Separator for Durable Operation of Li Metal Anode at High Rates

引用

Energy & Environmental Materials 2024年第1期7卷 265-274页

作者： yuanpeng Ji botao yuan Jiawei Zhang Zhezhi Liu Shijie Zhong Jipeng Liu yuanpeng Liu Mengqiu Yang Changguo Wang Chunhui Yang Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

Piezoelectric ceramic and polymeric separators have been proposed to effectively regulate Li deposition and suppress dendrite growth,but such separators still fail to satisfactorily support durable operation of lithium metal batteries owing to the fragile ceramic layer or low-piezoelectricity polymer as ***,by combining PVDF-HFP and ferroelectric BaTiO_(3),we develop a homogeneous,single-layer composite separator with strong piezoelectric effects to inhibit dendrite growth while maintaining high mechanical *** squeezed by local protrusion,the polarized PVDF-HFP/BaTiO_(3)composite separator generates a local voltage to suppress the local-intensified electric field and further deconcentrate regional lithium-ion flux to retard lithium deposition on the protrusion,hence enabling a smoother and more compact lithium deposition morphology than the unpoled composite separator and the pure PVDF-HFP separator,especially at high ***,the homogeneous incorporation of BaTiO_(3)highly improves the piezoelectric performances of the separator with residual polarization of 0.086 pC cm^(-2)after polarization treatment,four times that of the pure PVDF-HFP separator,and simultaneously increases the transference number of lithium-ion from 0.45 to *** from the prominent piezoelectric mechanism,the polarized PVDF-HFP/BaTiO_(3)composite separator enables stable cyclic performances of Li||LiFePO_(4)cells for 400 cycles at 2 C(1 C=170 mA g^(-1))with a capacity retention above 99%,and for 600 cycles at 5 C with a capacity retention over 85%.

关键词： composite separator Li metal anodes piezoelectric materials PVDF-HFP uniform Li deposition

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

Talcum-doped composite separator with superior wettability and heatproof properties for high-rate lithium metal batteries

引用

Chinese Chemical Letters 2023年第1期34卷 139-144页

作者： Mengqiu Yang yuanpeng Ji Yunfa Dong botao yuan Liwei Dong yuanpeng Liu Sue Hao Chunhui Yang Xiaoqiang Wu Qingquan Kong Jiecai Han Weidong He MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080China School of Mechanical Engineering Chengdu UniversityChengdu 610106China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China

Separator is supposed to own outstanding thermal stability,superior wettability and electrolyte uptake,which is essential for developing high-rate and safe lithium metal batteries(LMBs).However,commercial polyolefin separators possess poor wettability and limited electrolyte *** addressing this issue,we put forward a composite separator to implement above functions by doping layered-silicate(talcum)into polyvinylidene fluoride(PVDF).With significant improvement of electrolyte absorption benefiting from the strong adsorption energy values(-1.64-1.70 eV)between talcum and the electrolyte in lithium metal batteries,PVDF/Talcum(PVDF/TM)composite separator owns a small contact angle and superior electrolyte ***/TM composite separator with 10 wt%talcum(T-10)owns a tiny contact angle of 8°,while those of polypropylene(PP)and PVDF are 48°and 20°with commercial ***,the addition of thermotolerant talcum endows the T-10 composite separator with great thermostability,whose thermal shrinkage is only 5.39%at 150°C for 0.5 *** cell with LiFeO4cathode and the T-10 composite separator reaches 91.7 m Ah/g in discharge capacity at 4.8 m A/cm^(2)(10 C),far superior to that with pure PVDF separator(56.3 m Ah/g)and PP(51.4 m Ah/g).

关键词： Lithium metal batteries Composite separator PVDF Talcum Wettability Thermal stability

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

Stabilizing High-Nickel Cathodes via Interfacial Hydrogen Bonding Effects Using a Hydrofluoric Acid-Scavenging Separator

引用

Engineering 2024年第8期39卷 117-126页

作者： Shijie Zhong Liwei Dong botao yuan Yueyao Dong Qun Li yuanpeng Ji yuanpeng Liu Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments &Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

Nickel-rich layered Li transition metal oxides are the most promising cathode materials for high-energydensity Li-ion ***,they exhibit rapid capacity degradation induced by transition metal dissolution and structural reconstruction,which are associated with hydrofluoric acid(HF)generation from lithium hexafluorophosphate *** potential for thermal runaway during the working process poses another *** are promising components to alleviate the aforementioned ***,an ultrathin double-layered separator with a 10 lm polyimide(PI)basement and a 2 lm polyvinylidene difluoride(PVDF)coating layer is designed and fabricated by combining a nonsolvent induced phase inversion process and coating *** PI skeleton provides good stability against potential thermal shrinkage,and the strong PI-PVDF bonding endows the composite separator with robust structural integrity;these characteristics jointly contribute to the extraordinary mechanical tolerance of the separator at elevated ***,unique HF-scavenging effects are achieved with the formation of-CO…H-F hydrogen bonds for the abundant HF coordination sites provided by the imide ring;hence,the layered Ni-rich cathodes are protected from HF attack,which ultimately reduces transition metal dissolution and facilitates long-term cyclability of the Ni-rich ***||NCM811 batteries(where“NCM”indicates LiNi_(x)Co_(y)Mn_(1-x-y)O_(2))with the proposed composite separator exhibit a 90.6%capacity retention after 400 cycles at room temperature and remain sustainable at 60℃with a 91.4%capacity retention after 200 *** adopting a new perspective on separators,this study presents a feasible and promising strategy for suppressing capacity degradation and enabling the safe operation of Ni-rich cathode materials.

关键词： Nickel-rich cathodes Composite separator HF scavenging Transition metal dissolution Long-term cyclability

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

石化装置施工检修中承包商安全管理的新模式

引用

石油化工安全环保技术 2010年第4期26卷 12-13页

作者：袁博涛中国石油化工股份有限公司北京燕山分公司北京102500

通过分析石化装置施工检修中承包商的安全管理特点,提出用服务理念替代监管思维,用"五化"管理模式对承包商进行安全管理,有效提高承包商安全管理水平,保证装置检修、施工现场的安全。

关键词：承包商安全管理服务模式

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

Unified throughout-pore microstructure enables ultrahigh separator porosity for robust high-flux lithium batteries

引用

Electron 2023年第1期1卷 37-49页

作者： Dongjiang Chen yuanpeng Liu Chao Feng Yuhui He Shengyu Zhou botao yuan Yunfa Dong Haodong Xie Guangfeng Zeng Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina Center for Composite Materials and Structures Harbin Institute of TechnologyHarbinChina State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengduChina Chongqing Research Institute Harbin Institute of TechnologyChongqingChina Interdisciplinary Graduate Program in Materials Science Vanderbilt UniversityNashvilleTennesseeUSA

With small thickness,commercial polyolefin separators own low porosity to ensure sufficient thermomechanical properties,resulting in tortuous and enlarged Li+diffusion pathways that induce large overpotentials and detrimental dendrite *** a dilemma,the exploration of highly porous separators has been challenged by their large thickness,impairing the applicability of such ***,an ultraporous architecture is designed to shorten Li+transfer pathways by impregnating electrolyteaffinitive poly(vinylidene fluoride-co-hexafluoropropylene)into ultralight~3μm 3D-polytetrafluoroethylene scaffold(abbreviated as UP3D).The UP3D separator with a porosity of 74%gives rise to 70%enhancement in Li+transference and 77%reduction in Li+transfer resistance(2.67 mΩmm^(−1))and thus enables an ultrahigh Li+flux of 22.7 mA cm^(−2),effectively alleviating Li+concentration gradient across the *** the separator,the LiFePO4 half cell delivers a capacity of 118 mAh g^(−1) with an unparalleled capacity retention of 90%after 1000 cycles at 2 C,and a graphite||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)pouch full cell delivers an areal energy density of 6.8 mWh cm^(−2)at 8.848 mA(1.4 mA cm^(−2))with a high cathode loading of 134.9 *** results,together with the scalable production of the separator,reflect its promising potential in high-flux battery applications of separators that require both ultrahigh porosity and reliability.

关键词： Li deposition Li-ion batteries polytetrafluoroethylene separator ultrahigh porosity

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

Pressure-Temperature Evolution of a Mylonitic Gneiss from the Lower Seve Nappe in the Handol Area,Central Sweden

引用

Journal of Earth Science 2021年第6期32卷 1496-1511页

作者： botao Li Hans-Joachim Massonne Xiaoping yuan School of Earth Sciences China University of GeosciencesWuhan430074China Fakultät Chemie Universität Stuttgart70569StuttgartGermany

Ultrahigh-pressure metamorphism has recently been reported from various crustal rocks in the Seve Nappe Complex(SNC)in which microdiamonds were ***,in gneiss from the Lower Seve Nappe(LSN),neither any direct petrographic indication for UHP was reported nor the metamorphic evolution was well *** studied a mylonitic gneiss from the Handol area of the LSN and applied phase-diagram modeling and Ti-in-biotite *** on the compositions of garnet and biotite and observed mineral assemblages,a path was reconstructed passing through about 8 kbar and 730℃at prograde ***-pressure and initial retrograde stages occurred at 9.0–10.2 kbar at 745-775℃,and 7–9 kbar at<750℃,*** ultrahigh-pressure evidence was recognized compatible with medium-pressure metamorphism deduced in earlier studies of gneiss from the *** higher peak pressures were reported recently for metamorphic rocks of the LSN,a possible interpretation is that slices or erased blocks were subducted,metamorphosed at different depths,and exhumed in a subduction ***,the dominant gneiss of the SNC experienced only a medium-pressure metamorphism in the upper part of the downgoing Baltica *** from different depth levels were brought together in an exhumation channel located between Baltica and the overlying plate.

关键词： Lower Seve Nappe Swedish Caledonides mylonitic gneiss P-T pseudosection modeling Ti-in-biotite thermometry metamorphic rocks

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

风机叶片的几何形状研究

引用

山东工业大学学报 2001年第1期31卷 69-73页

作者：范波涛李绍珍苑国强山东大学机械工程学院济南250061

从提高轴流式风机的综合性能出发 ,运用气动设计原理——基元级进出口速度三角形 ,分析了风机叶片的扭曲原因和扭曲规律 .并运用工程图学的理论 ,重点对扭曲叶片进行了几何形状分析 ,在此基础上导出了叶片的数学表达式 ,为叶片的精确设... 详细信息

从提高轴流式风机的综合性能出发 ,运用气动设计原理——基元级进出口速度三角形 ,分析了风机叶片的扭曲原因和扭曲规律 .并运用工程图学的理论 ,重点对扭曲叶片进行了几何形状分析 ,在此基础上导出了叶片的数学表达式 ,为叶片的精确设计及制造提供理论依据 .

关键词：轴流式鼓风机叶片几何形状翘曲

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

Global Guidance-Based DRL Multi-Sensor Fusion Navigation Strategy

Global Guidance-Based DRL Multi-Sensor Fusion Navigation Str...

引用

第35届中国过程控制会议

作者： Yanxu Sun Jiayu Chai botao Zhang Qiang Lu Weikang yuan Hongye Yang School of Automation Hangzhou Dianzi University

This thesis presents a novel path planning approach for mobile robots that combines deep reinforcement learning(DRL) with multi-sensor fusion, enhanced by a global guidance strategy to elevate navigation capabilities in complex environments. Leveraging Long Short-Term Memory(LSTM) networks, the method processes extensive sequences of LiDAR data,employs Convolutional Neural Networks(CNNs) for interpreting visual inputs from depth cameras, and integrates Inertial Measurement Unit(IMU) data to consistently direct the robot towards its goal while dynamically adapting to changes in the environment. The learning process is enhanced with an advanced version of the Prioritized Experience Replay(PER) algorithm, which refines the experience replay mechanism to boost the model's precision and resilience. Additionally, by integrating global route pre-planning with local adjustments, this approach not only secures global path optimality but also heightens the system's responsiveness to environmental changes. Extensive numerical simulations validate the model's efficacy in adapting its navigation strategies, thereby ensuring path optimality and safety under varied conditions.

关键词： Mobile Robot Navigation Deep Reinforcement Learning Multisensor Fusion Prioritized Experience Replay

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：