On the controlled electrochemical preparation of R4N+ graphite intercalation compounds and their host structural deformation effects
On the controlled electrochemical preparation of R4N+ graphite intercalation compounds and their host structural deformation effects
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DOI：
10.1016/j.jelechem.2014.07.025
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发表时间：
2014-09-15
影响因子：
4.5
通讯作者：
Dryfe, Robert A. W.
中科院分区：
文献类型：
--
作者：
Cooper, Adam J.;Velicky, Matej;Dryfe, Robert A. W.
我们提出了高取向热解石墨 (HOPG) 和玻碳 (GC) 电极上四烷基铵 (R4N+) 还原化学的电化学研究。我们表明，通过电化学控制嵌入和在层状 HOPG 中形成石墨插层络合物 (GIC)，可以防止四烷基铵阳离子的不可逆还原，并且可以通过使用恒电位控制实现 GIC 的后续脱嵌。具有不同烷基链长度（甲基、乙基和丁基）的 R4N+ 阳离子已被证明在充电/放电研究中表现出优异的电荷恢复效果。最后，研究了电极膨胀对恢复电荷程度的影响，并通过扫描电子显微镜 (SEM) 和 X 射线衍射 (XRD) 探讨了石墨阴极上观察到的 R4N+ 插层效应。 (C) 2014 年作者。由 Elsevier B.V. 出版
We present electrochemical studies of tetraalkylammonium (R4N+) reduction chemistry at Highly Orientated Pyrolytic Graphite (HOPG) and glassy carbon (GC) electrodes. We show that by electrochemically controlled intercalation and formation of a graphite intercalation complex (GIC) into layered HOPG, the irreversible reduction of the tetraalkylammonium cation can be prevented and subsequent de-intercalation of the GIC via the use of potentiostatic control is achievable. R4N+ cations with varying alkyl chain lengths (methyl, ethyl and butyl) have been shown to exhibit excellent charge recovery effects during charge/discharge studies. Finally the effects of electrode expansion on the degree of recovered charge have been investigated and the observed effects of R4N+ intercalation on the graphite cathode have been probed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). (C) 2014 The Authors. Published by Elsevier B.V.