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Application of Ionic Liquid as K-Ion Electrolyte of Graphite//K2Mn[Fe(CN)6] Cell
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-08-20 , DOI: 10.1021/acsenergylett.0c01393 Hiroo Onuma 1 , Kei Kubota 1, 2 , Shotaro Muratsubaki 1 , Tomooki Hosaka 1 , Ryoichi Tatara 1, 2 , Takayuki Yamamoto 2, 3 , Kazuhiko Matsumoto 2, 4 , Toshiyuki Nohira 2, 3 , Rika Hagiwara 2, 4 , Hiroshi Oji 5 , Satoshi Yasuno 5 , Shinichi Komaba 1, 2
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-08-20 , DOI: 10.1021/acsenergylett.0c01393 Hiroo Onuma 1 , Kei Kubota 1, 2 , Shotaro Muratsubaki 1 , Tomooki Hosaka 1 , Ryoichi Tatara 1, 2 , Takayuki Yamamoto 2, 3 , Kazuhiko Matsumoto 2, 4 , Toshiyuki Nohira 2, 3 , Rika Hagiwara 2, 4 , Hiroshi Oji 5 , Satoshi Yasuno 5 , Shinichi Komaba 1, 2
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A binary ionic liquid of K[FSA]-[C3C1pyrr][FSA] (2:8 in molar ratio) in which N-methyl-N-propylpyrrolidinium and bis(fluorosulfonyl)amide are abbreviated as [C3C1pyrr] and [FSA], respectively, is applied as an electrolyte of K-ion batteries for the first time. A graphite composite electrode with sodium carboxymethylcellulose as the binder undergoes reversible potassium intercalation, forming a KC8 compound in a K half-cell filled with the binary ionic liquid as electrolyte. Because the K[FSA]-[C3C1pyrr][FSA] does not corrode an Al foil current collector even with polarization of up to 6 V versus K+/K, a K2Mn[Fe(CN)6] positive electrode yields a highly reversible capacity of 134 mAh g–1 at ca. 4.0 V. We demonstrate a K-ion battery of graphite//K2Mn[Fe(CN)6] configuration with an ionic liquid electrolyte that exhibits stable charge and discharge properties over 200 cycles at room temperature. The redox performance is significantly improved by replacing the conventional KPF6 carbonate ester solution with the ionic liquid.
中文翻译：
离子液体作为石墨// K 2 Mn [Fe（CN）6 ]电池的K离子电解质的应用
K [FSA]-[C 3 C 1 pyrr] [FSA]（摩尔比为2：8）的二元离子液体，其中N-甲基-N-丙基吡咯烷鎓和双（氟磺酰基）酰胺缩写为[C 3 C 1个吡咯]和[FSA]，分别被施加为的K-离子电池首次的电解质。以羧甲基纤维素钠为粘合剂的石墨复合电极经历可逆的钾嵌入，在填充有二元离子液体作为电解质的K半电池中形成KC 8化合物。因为K [FSA]-[C 3 C 1 pyrr] [FSA]不会腐蚀Al箔集电器，即使极化相对于K高达6 V+ / K，K 2 Mn [Fe（CN）6 ]正极在大约120℃时可产生134 mAh g –1的高度可逆容量。4.0V。我们展示了具有离子液体电解质的石墨// K 2 Mn [Fe（CN）6 ]构型的K离子电池，该离子液体在室温下经过200次循环后表现出稳定的充电和放电性能。通过用离子液体代替常规的KPF 6碳酸酯溶液，可以显着提高氧化还原性能。
更新日期：2020-09-11
中文翻译：
离子液体作为石墨// K 2 Mn [Fe（CN）6 ]电池的K离子电解质的应用
K [FSA]-[C 3 C 1 pyrr] [FSA]（摩尔比为2：8）的二元离子液体，其中N-甲基-N-丙基吡咯烷鎓和双（氟磺酰基）酰胺缩写为[C 3 C 1个吡咯]和[FSA]，分别被施加为的K-离子电池首次的电解质。以羧甲基纤维素钠为粘合剂的石墨复合电极经历可逆的钾嵌入，在填充有二元离子液体作为电解质的K半电池中形成KC 8化合物。因为K [FSA]-[C 3 C 1 pyrr] [FSA]不会腐蚀Al箔集电器，即使极化相对于K高达6 V+ / K，K 2 Mn [Fe（CN）6 ]正极在大约120℃时可产生134 mAh g –1的高度可逆容量。4.0V。我们展示了具有离子液体电解质的石墨// K 2 Mn [Fe（CN）6 ]构型的K离子电池，该离子液体在室温下经过200次循环后表现出稳定的充电和放电性能。通过用离子液体代替常规的KPF 6碳酸酯溶液，可以显着提高氧化还原性能。
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