检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

嵌段共聚物电解质的制备及其电化学性能

材料工程 2024年第6期52卷 69-77页

作者：张锟刘娜田君梁晓嫱陈光海高洪波胡道中佟蕾田崔钧王浩辰中国北方车辆研究所北京100072 北京卫蓝新能源科技有限公司北京102402

通过设计聚合物分子结构,采用热引发自由基聚合方法合成聚乙二醇甲醚甲基丙烯酸酯(PEGMEMA)和甲基丙烯酸缩水甘油酯(GMA)的二嵌段共聚物电解质PEGMEMAm-GMAn-Br(PGA-Br),并研究其电化学性能。结果表明:将PGA嵌段或接枝到聚合物电解质上... 详细信息

通过设计聚合物分子结构,采用热引发自由基聚合方法合成聚乙二醇甲醚甲基丙烯酸酯(PEGMEMA)和甲基丙烯酸缩水甘油酯(GMA)的二嵌段共聚物电解质PEGMEMAm-GMAn-Br(PGA-Br),并研究其电化学性能。结果表明:将PGA嵌段或接枝到聚合物电解质上,可提高聚合物电解质的离子电导率,室温下的离子电导率达1.05×10^(−4)S·cm^(−1)。同时,PGA-Br嵌段共聚物电解质具有较低的玻璃化转变温度(-65℃)、较高的热分解温度、较宽的电化学稳定窗口(5.1 V)和阻燃特性。PGA-Br共聚物电解质组装下的固态Li|Li对称电池具有增强的电极/电解质固-固界面,可实现金属锂均匀沉积,有效抑制锂枝晶的生长。在0.1 C倍率下,基于PGA-Br嵌段共聚物电解质组装的LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)|PGA-Br|Li固态全电池可实现较高的首周放电比容量(160.1 mAh·g^(−1)),且循环100周次后容量保持率高达91.5%,库仑效率稳定在98.5%以上。

关键词：固态锂金属电池嵌段共聚物电解质锂金属负极锂枝晶热引发聚合

维普期刊数据库博看期刊

Research Progress of Lithium Plating on Graphite Anode in Lithium-Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第1期39卷 165-173页

作者： daozhong hu Lai Chen Jun Tian Yuefeng Su Ning Li Gang Chen Yulu hu Yueshan Dou Shi Chen Feng Wu Beiing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Testing Technology China North Vehicle Research InstituteBeijing 100072China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Lithium plating on graphite anode is triggered by harsh conditions of fast charge and low temperature,which sig-nificantly accelerates SOH(state of health)degradation and may cause safety issues of lithium ion batteries(LIBs).This paper has reviewed recent research progress of lithium plating on graphite ***,we summarize the forming mechanisms of Li plating with(corresponding influence factors,the detect-ing methods and hazard of Li ***,approaches to suppress Li plating are discussed,including anode surface modification,electrolyte composition optimization and development of optimal ***,we con-clude and propose the remaining challenges and prospects in terms of mechanism research,detecting approaches,and suppressing methods of Li *** review highlights the development of Li plating research and plays a guiding rule of further study on Li plating in LIBs.

关键词： Lithium Plating Graphite anode Electron microscopy Low-temperature physics

The mechanism of side reaction induced capacity fading of Ni-rich cathode materials for 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

Journal of Energy Chemistry 2021年第7期30卷 1-8页

作者： daozhong hu Yuefeng Su Lai Chen Ning Li Liying Bao Yun Lu Qiyu Zhang Jing Wang Shi Chen Feng Wu School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China China North Vehicle Research Institute Beijing 100072China

Ni-rich cathode materials show great potential of applying in high-energy lithium ion batteries,but their inferior cycling stability hinders this *** on the electrode/electrolyte interfacial reaction is indispensable to understand the capacity failure mechanism of Ni-rich cathode materials and further address this *** work demonstrates the domain size effects on interfacial side reactions firstly,and further analyzes the inherent mechanism of side reaction induced capacity decay through comparing the interfacial behaviors before and after MgO *** has been determined that LiF deposition caused thicker SEI films may not increase the surface film resistance,while HF erosion induced surface phase transition will increase the charge transfer resistance,and the later plays the dominant factor to declined capacity of Ni-rich cathode *** work suggests strategies to suppress the capacity decay of layered cathode materials and provides a guidance for the domain size control to match the various applications under different current rates.

关键词： Lithium-ion batteries Ni-rich cathode materials LiF deposition HF erosion Failure mechanism

Unrevealing the effects of low temperature on cycling life of 21700-type cylindrical Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第9期30卷 104-110页

作者： daozhong hu Gang Chen Jun Tian Ning Li Lai Chen Yuefeng Su Tinglu Song Yun Lu Duanyun Cao Shi Chen Feng Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of Technology100081 BeijingChina Beijing Institute of Technology Chongqing Innovation Center 401120 ChongqingChina Department of Testing Technology China North Vehicle Research Institute100072 BeijingChina Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of Technology100081 BeijingChina

The low-temperature performance of Li-ion batteries(LIBs) has important impacts on their commercial applications. Besides the metallic lithium deposition, which is regarded as one of the main failure mechanisms of the LIBs at low temperatures, the synergistic effects originating from the cathode, anode, electrolyte, and separators to the batteries are still not clear. Here, the 21700-type cylindrical batteries were evaluated at a wide range of temperatures to investigate the failure mechanism of batteries. Voltage relaxation, and the post-mortem analysis combined with the electrochemical tests, unravel that the capacity degradation of batteries at low temperature is related to the lithium plating at graphite anodes,the formation of unsatisfied solid deposited/decomposed electrolyte mixture phase on the anode, the precipitation of solvent in the electrolytes and the block of separator pores, and the uneven dissolved transition metal-ions from the cathode. We hope this finding may open up a new avenue to alleviate the capacity degradation of advanced LIBs at low temperatures and shed light on the development of outstanding low-temperature LIBs via simultaneous optimization of all the components including electrodes, electrolytes and separators.

关键词： Low temperature Cycling life Lithium plating Solid deposited/decomposed electrolyte mixture phase Voltage relaxation

Methods for promoting electrochemical properties of LiNi_(l/3) Co_(l/3) Mn_(l/3)O_2 for lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第19期58卷 1869-1875页

作者： BAO LiYing CHE huiQuan hu daozhong SU YueFeng WANG Zhao LI Ning CHEN Shi WU Feng Beijing Key Laboratory of Environment Science and Engineering School of Chemical Engineering and Environment Beijing Institute of Technology National Development Center of High Technology Green Materials China North Vehicle Research Institute

One popular study of the recent research is to develop the cathode materials for lithium-ion batteries. As a new cathode material for lithium-ion batteries, the LiNil/3Col/3Mnl/3O2 has drawn widespread attention because of its high capacity, high cut-off voltage and high tap density. Its theoretical capacity is 277.8 mAh/g. The crystal structure of LiNil/3Col/3Mnl/3O2 is α-NaFeO 2 . The structural and morphological features of the LiNil/3Col/3Mnl/3O2 are introduced in this paper. The emphasis is to present the methods for promoting electrochemical properties. The electrochemical properties and structure characteristics are discussed. And the prospect of layered LiNil/3Col/3Mnl/3O2 is forecast in the end.

关键词：电化学性能锂离子电池晶体结构振实密度截止电压形态特征高容量

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

基于神经网络的动力电池荷电状态的预测

计算机应用与软件 2007年第9期24卷 102-104页

作者：李德伟陈实吴锋杨凯胡道中北京理工大学化工与环境学院北京100081

介绍了一种将电池对脉冲电流信号的响应参数作为人工神经网络的输入来预测电池SOC(state of charge)的方法。网络的输出为SOC,网络的输入为电池对脉冲电流的响应参数。结果表明,用这种方法来预测SOC其预测精度能达到在电动车上应用的要求。

关键词： SOC BP网络镍氢电池内阻

在线全文

学校读者我要写书评

暂无评论

板材成形模拟技术在汽车工业上的应用

特殊钢 2002年第Z1期23卷 35-37页

作者：李飞鹏欧阳可居胡道钟陈吕罡东风汽车公司工艺研究所十堰442001

　　汽车覆盖件具有结构尺寸大、形状复杂、材料薄、成形质量高等特点,从它的产品设计、工艺分析确定、模具设计、制造、调试到最终产品是一个相当复杂的过程.影响汽车覆盖件成形的因素有很多,如模具的形状、板材性能、毛坯形状、板料... 详细信息

　　汽车覆盖件具有结构尺寸大、形状复杂、材料薄、成形质量高等特点,从它的产品设计、工艺分析确定、模具设计、制造、调试到最终产品是一个相当复杂的过程.影响汽车覆盖件成形的因素有很多,如模具的形状、板材性能、毛坯形状、板料与模具的摩擦及其它边界条件等.……

关键词：板材成形模拟技术汽车工业应用 Automobile Industry Simulation Technique 汽车覆盖件成形毛坯形状模具设计结构尺寸工艺分析成形质量产品设计边界条件板材性能制造摩擦调试材料板料

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

锂离子电容器直流内阻测试方法研究

储能科学与技术 2018年第6期7卷 1242-1247页

作者：王婧高洪波胡道中魏三平郑丽花赵云鹏钟明 BURKE Andrew F 李灵宏德益创新(北京)科技有限公司山西德益科技有限公司中国北方车辆研究所长治市科技情报研究所 University of California Davis

直流内阻(简称"内阻")是衡量超级电容器性能最重要的电化学参数之一,但目前尚未有统一的测试方法用于锂离子电容器的内阻测试。本工作使用不同的充放电测试程序,采用不同的内阻计算方法来评测比较锂离子电容单体样品的内阻值。结果表明... 详细信息

直流内阻(简称"内阻")是衡量超级电容器性能最重要的电化学参数之一,但目前尚未有统一的测试方法用于锂离子电容器的内阻测试。本工作使用不同的充放电测试程序,采用不同的内阻计算方法来评测比较锂离子电容单体样品的内阻值。结果表明,不同的充放电测试方法、不同的放电截止电压、不同的内阻计算方法,影响锂离子电容器内阻测量值。以100 ms压降法计算的内阻可能接近放电开始阶段的稳态内阻,可以使用普通国产电池测试设备,简单、易行、可靠,经进一步的验证后,可以考虑推广使用。

关键词：锂离子电容器内阻充放电测试程序计算方法截止电压

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

锂离子电池安全性测试与评价方法分析

储能科学与技术 2018年第6期7卷 1128-1134页

作者：田君田崔钧王一拓佟蕾赵鼎胡道中高洪波陈芬高申王子冬刘家亮中国北方车辆研究所北京100072 中国电力科学研究院新能源与储能运行控制国家重点实验室北京100192

对锂离子电池的机械滥用、热滥用和电滥用安全性测试与评价方法的原理进行了分析,对具有代表性的锂离子电池安全测试标准GB/T 31467.3/31485和SAE J2464/UN 38.3的相关试验方法进行了对比分析。应用X射线三维CT技术,测试了安全性试验前... 详细信息

对锂离子电池的机械滥用、热滥用和电滥用安全性测试与评价方法的原理进行了分析,对具有代表性的锂离子电池安全测试标准GB/T 31467.3/31485和SAE J2464/UN 38.3的相关试验方法进行了对比分析。应用X射线三维CT技术,测试了安全性试验前后锂离子电池内部结构的变化,对X射线三维CT应用于锂离子电池安全性测试分析的前景进行了展望。为锂离子电池安全失效模式分析指明了方向。

关键词：锂离子电池安全性测试方法 X射线三维CT