Alginate Gel Containing an Ionic Liquid and Its Application to Non-Aqueous Electric Double Layer Capacitors
Alginate Gel Containing an Ionic Liquid and Its Application to Non-Aqueous Electric Double Layer Capacitors
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DOI：
10.1149/2.020111esl
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发表时间：
2011
影响因子：
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通讯作者：
Masaki R. Yamagata;Kazunari Soeda;Shigeaki Yamazaki;M. Ishikawa
中科院分区：
文献类型：
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作者：
Masaki R. Yamagata;Kazunari Soeda;Shigeaki Yamazaki;M. Ishikawa
以海藻酸钠（Alg）和1-乙基-3-甲基咪唑啉四氟硼酸盐（EMImBF 4）为原料，制备了用于双电层电容器（EDLC）的非水凝胶电解质.透明无色凝胶片具有高水平的机械强度和构建EDLC电池所需的离子液体的保持性。根据充电/放电测量，具有Alg/EMImBF 4凝胶的模型EDLC电池显示出高放电电容，尽管使用凝胶状态电解质，这意味着海藻酸盐对活性炭电极的高亲和力导致电极/电解质界面电阻的降低。具有Alg/EMImBF 4的测试电池在5，000次循环期间保持其库仑效率超过99.8%。
Non-aqueous gel electrolytes based on an alginate (Alg) and 1-ethyl-3-methylimidazolim tetrafluoroborate (EMImBF 4) are prepared for electric double layer capacitors (EDLCs). The transparent colorless gel sheet has the high levels of mechanical strength and retentivity of ionic liquid needed to construct EDLC cells. According to charge/discharge measurements, a model EDLC cell with an Alg/EMImBF 4 gel shows high discharge capacitance in spite of using a gel-state electrolyte, implying that high affinity of alginate for an activated carbon electrode leads to a decrease in the electrode/electrolyte interfacial resistance. A test cell with Alg/EMImBF 4 maintains its coulombic efficiency over 99.8% during 5,000 cycles.