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聚合物固体电解质研究进展 总被引:2,自引:2,他引:2
本文概述近十几年来聚合物固体电解质材料开发研究的状况,包括线型高分子、为改进性能而发展起来的枝型、梳型及交联型高分子,并对高分子与金属盐络合的离子聚合物结构和性能作了描述。阐述了高分子固体电解质的导电行为、导电模型及导电机理。对聚合物固体电解质的各种应用作了介绍并简要讨论了高分子固体电解质的发展趋向及前景。 相似文献
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本文通过酯交换反应合成了一系列脂肪族聚丁二酸酯,对他们的结构和性能作了表征。发现聚酯存在多晶现象,其熔点有奇偶性变化规律。探索了由此系列聚酯与高氯酸锂形成的固体电解质的结构和离子导电性。无机盐的加入提高了电解质的玻璃化温度但降低了聚酯的熔点及结晶度。聚酯电解质的晶体类似于聚酯,其无机盐主要溶解于聚酯的无定形区域。聚酯系列电解质的导电率也有偶奇效应,与熔点变化相反;熔点高的电解质导电率低,熔点低的电解质导电率高。电解质的导电率随温度改变而变化,在室温下电解质的导电率可达10^-6s/cm。高分子链上侧基的引入将大大降低电解质的导电性。 相似文献
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本文介绍固体电解质的发现过程、概念、分类、物理特性、结构特征及其多种应用,并简单介绍新兴的边缘学科固体离子学。作者认为当前大中学化学教材及多种工具书中电解质的定义不够准确全面,提出了自己对电解质的定义。 相似文献
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All-solid-state lithium batteries are considered to be a new battery system with great development potential and application prospects due to the advantages of high energy density and high security.As a key component of all-solid-state lithium batteries,the development of solid-state electrolytes has received extensive attention in recent years,but most solid electrolytes still exhibit problems,such as low ion conductivity and poor interface compatibility.The design of composite solid-state electrolyte materials with both excellent electrochemical and mechanical properties is an effective way to develop all-solid-state lithium batteries.This review introduces different types of pure component solid electrolytes and analyzes their respective advantages and characteristics firstly.Furthermore,the research progress of composite electrolytes in preparation method,ionic conduction,suppression of lithium dendrites,and the improvement of electrochemical performances are reviewed from the perspective of composite electrolyte structure design,which is to meet different performance requirements.And the future development direction and trend of composite electrolytes are prospected. 相似文献
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Dr. Nian‐Wu Li Yang Shi Dr. Ya‐Xia Yin Dr. Xian‐Xiang Zeng Jin‐Yi Li Prof. Cong‐Ju Li Prof. Li‐Jun Wan Prof. Rui Wen Prof. Yu‐Guo Guo 《Angewandte Chemie (International ed. in English)》2018,57(6):1505-1509
Lithium (Li) metal is a promising anode material for high‐energy density batteries. However, the unstable and static solid electrolyte interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we design a smart Li polyacrylic acid (LiPAA) SEI layer high elasticity to address the dynamic Li plating/stripping processes by self‐adapting interface regulation, which is demonstrated by in situ AFM. With the high binding ability and excellent stability of the LiPAA polymer, the smart SEI can significantly reduce the side reactions and improve battery safety markedly. Stable cycling of 700 h is achieved in the LiPAA‐Li/LiPAA‐Li symmetrical cell. The innovative strategy of self‐adapting SEI design is broadly applicable, providing opportunities for use in Li metal anodes 相似文献
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To meet the demand for long-range electric vehicles with high-energy-density batteries,the solid-state batteries(SSBs)have attracted ever-increasing attention due to their enormous potential in affording the energy density greater than 400 W·h/kg.As the key materials,the solid electrolytes can be classified as inorganic electrolyte and organic electrolyte.The former usually has high ionic conductivity,good stability and mechanical properties,whereas being heavy and brittle.The latter is usually flexible,light and easy to mass produce,nevertheless has poor ionic conductivity and stability.Thus,the combination of the organic and the inorganic electrolytes for the composite membranes has become the inevitable trend to achieve the high energy density and safety of lithium batteries.From the perspective of practical application,this paper discusses how to construct the ideal organic-inorganic composite solid electrolyte with low areal specific resistance,thin texture,wide electrochemical window and high safety for applicable SSBs.Furthermore,the critical challenges and future development directions are prospected for the composite solid electrolytes. 相似文献
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固体电解质不存在易燃等安全问题, 发展固态锂电池技术是解决液体电解质锂电池安全问题的根本途径. 随着社会对大体积锂离子电池需求的增长以及人们对电池的安全性关注度的日益提高, 发展固态锂离子电池已迫在眉睫. 制备性能良好的全固态锂电池的关键在于获得高室温离子导电率的固体电解质以及在电极与电解质之间形成良好的接触面. 大量的研究集中在制备高室温导电率的固体电解质, 目前已经制备出能与液体电解质相媲美的高室温导电率的固体电解质, 但固态锂电池的高倍率性能仍然较差, 原因是在电极与固体电解质的界面处具有较高的阻抗. 关于固态锂电池电极与电解质界面的研究文章相对较少. 本文简要介绍了一些具有高室温导电率的氧化物及硫化物电解质, 着重分析了全固态锂电池电极与电解质界面处具有高阻抗的原因以及减少界面阻抗的界面改性方法. 相似文献