High Seebeck coefficient redox ionic liquid electrolytes for thermal energy harvesting
High Seebeck coefficient redox ionic liquid electrolytes for thermal energy harvesting
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DOI：
10.1039/c3ee41608a
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发表时间：
2013-09-01
影响因子：
32.5
通讯作者：
Pringle, Jennifer M.
中科院分区：
文献类型：
--
作者：
Abraham, Theodore J.;MacFarlane, Douglas R.;Pringle, Jennifer M.
通过阴离子交换操作钴（II/III）三（联吡啶）氧化还原对改善了其在离子液体和3-甲氧基丙腈（MPN）中的溶解度。这使得能够制备具有高塞贝克系数（S-e = 1.5- 2.2mV K-1）的电解质，从而具有良好的热收集前景。离子液体的独特物理性质为其在热电化学电池中用作电解质提供了理想的特性，特别是对于涉及在100-200摄氏度范围内的温度下可用的热能的应用。本文描述了一系列离子液体和MPN与Co-II/（III）（bpy）（3）（NTf 2）（2/3）电对组成的热电化学电池的发电特性。在未优化的器件中，功率密度达到>0.5 W m（-2），在130摄氏度的热侧工作。高塞贝克系数似乎有它的起源在高到低的自旋转变后，在这个钴络合物中的电子转移。
Manipulation of the cobalt(II/III) tris(bipyridyl) redox couple through anion exchange has improved its solubility in ionic liquids and 3-methoxypropionitrile (MPN). This has allowed the preparation of electrolytes with high Seebeck coefficients, S-e = 1.5-2.2 mV K-1, and thereby excellent prospects for thermal harvesting. The unique physical properties of ionic liquids offer ideal characteristics for their use as electrolytes in thermoelectrochemical cells, particularly for applications involving thermal energy available at temperatures in the 100-200 degrees C range. The power generation characteristics of thermoelectrochemical cells using a series of ionic liquids and MPN with the Co-II/(III)(bpy)(3)(NTf2)(2/3) couple are described. Power densities reached >0.5 W m(-2) in unoptimized devices, operating with a 130 degrees C hot side. The high Seebeck coefficient appears to have its origins in the high-to-low spin transition upon electron transfer in this cobalt complex.