基于电沉积导电高分子改性硫电极的Li-S电池 |
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引用本文: | 仲玉娇,刘振,郑祥,袁宁一,丁建宁.基于电沉积导电高分子改性硫电极的Li-S电池[J].工程塑料应用,2016(6). |
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作者姓名: | 仲玉娇 刘振 郑祥 袁宁一 丁建宁 |
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作者单位: | 常州大学材料科学与工程学院,江苏省光伏科学与工程协同创新中心,江苏常州 213164 |
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基金项目: | 国家自然科学基金项目(14020269,51272033),江苏省科技厅自然科学基金项目(14020226) |
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摘 要: | 采用电化学法,在硫电极表面沉积一层聚(3,4–乙烯二氧噻吩)薄膜,并研究了相关锂–硫(Li-S)电池的电化学性能。结果表明,这种简单的电化学方法容易实现在整个硫电极表面制备一层致密、均匀、厚度可控的导电高分子薄膜,并且显著提高Li-S电池的循环稳定性。其中,薄膜电沉积500次时,其改性硫电极的初始放电比容量为955 mAh/g,在放电电流密度为900 mA/g时,800次充放电循环后比容量为590 mAh/g,即每个循环的容量损失率仅为0.047%。
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关 键 词: | 电化学法 导电高分子 Li-S电池 电化学性能 |
Li-S Batteries based on Electrodeposited Conductive Polymer Modiifed S Cathode |
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Abstract: | A novel method through electrochemical process to modify a dense and uniform poly(3,4-ethylenedioxythi ophene) film (E–PEDOT film) on the S cathode was proposed. In addition,the electrochemical performance of Li-S battery was investigated. The results revealed that stable enough Li-S batteries by modifying the common S cathode using a simple electrochemical method were obtained. Li-S batteries with this E–PEDOT film (electrodeposited 500 times) modified S cathode showed an initial capacity of 955 mAh/g and retained about 590 mAh/g after 800 cycles,which means a slow capacity decay rate of 0.047% per cycle over the first 800 cycles at a current density of 900 mA/g. |
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Keywords: | electrochemical method conductive polymer Li-S batteries electrochemical performance |
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