论文总字数：16155字

摘 要

目前各国政府为了应对日益严峻的污染问题，鼓励发展新型的绿色能源来代替煤、石油等传统能源。但是新型能源如潮汐能，受到外在环境的影响，存在缺点，而二次电池在风能、太阳能等可再生、间歇性能源的高效利用和存储方面能够提供强有力的支持。

目前，二次电池的研究主要集中在基于 Li 、Na 等阳离子传输的电化学体系，本课题组提出了一种基于阴离子传输的新型二次电池-氯离子电池。

氯离子电池具备无污染、能量密度高、容量大等优点，但是使用液态的电解质容易产生事故，具有安全隐患，于是本课题提出采用凝胶型电解质体系，该种体系也可以解决固态的电解质较差的离子电导率、膜机械强度不好的问题。

本课题研究了采用以PVDF-HFP共聚物为基体，加入BMIMCl与BMIMBF₄的离子液体混合物和分散剂二氧化钛（TiO₂）制成的电解质膜，进一步装于电池后，对进行AC以及LSV测试，证明这种体系可以获得较高的电导率和较为稳定的电化学窗口。

通过PVDF-HFP/TiO₂这种电解质体系的构建，实现了PVDF-HFP体系的GPE作为氯电中电解质材料的可行性。

关键词：聚合物电解质 氯离子电池 离子电导率

Preparation and characterization of PVDF-HFP/TiO₂ gel

polymer electrolyte for chloride ion batteries

ABSTRACT

At present, governments encourage the development of new green energy to replace coal, oil and other traditional energy sources in order to cope with the increasingly serious ecological environment problems. But new energy such as tidal energy, which is affected by the external environment, these energy have the shortcomings, and the twice battery can provide strong support in wind, solar and other renewable and efficient use and storage of intermittent energy at the same time. Twice battery in the starting power, portable electronic products and new energy vehicles and other fields have important applications. At present, the research mainly concentrated in the twice cell based on Li , Na and other cationic electrochemical system transmission, our reserach group put forward a new twice battery based on anion transport-chloride ion battery.

Advantages of chlorine ion battery has the advantages of no pollution, high energy density, large capacity, but the use of liquid electrolyte is easy to cause the accident, which has hidden trouble, so this study proposed using a gel type electrolyte system, the system can also solve the problem of solid electrolyte poor ion conductivity and the problem that the mechanical strength of the membrane is not good.

Our reserach group preliminary study the use in PVDF-HFP copolymer as the matrix, adding mixture of ionic liquids BMIMCl with BMIMBF₄ and dispersing agent of titanium dioxide (TiO₂) ,then we made the polymer electrolyte membrane which was further installed in the wake of the battery, then we made the battery AC test method and LSV testing,we found that the system can obtain higher conductivity and electrochemical window of relatively stable.

Through the construction of PVDF-HFP/TiO₂ gel type polymer electrolyte system, the feasibility of the PVDF-HFP GPE as the chloride ion battery electrolyte material was realized.

Key word: Polymer electrolyte chloride ion battery ionic conductivity

目 录

摘要 I

ABSTRACT II

第一章 前言 1

1.1聚合物电解质研究现状 1

1.1.1全固态聚合物电解质（SPE） 2

1.1.2凝胶聚合物电解质（GPE） 3

1.1.3复合聚合物电解质（CPE） 4

1.2离子液体及作为电池电解质的应用 5

1.3论文研究的目的、内容和手段以及创新点 5

2.3.1研究的目的和内容 5

2.3.2研究手段 6

2.3.3实验创新点 6

第二章 实验部分 7

2.1实验原料 7

2.2实验设备 7

2.3试样制备 8

2.4电池性能表征指标及测试方法 10

第三章 实验结果与讨论 13

3.1离子电导率 13

3.2电化学窗口分析 15

3.3电池的恒流充放电性能分析 15

第四章 结论与展望 18

参考文献 19

致 谢 21

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