Flexible gel-state thermoelectrochemical materials with excellent mechanical and thermoelectric performances based on incorporating Sn2+/Sn4+ electrolyte in polymer/carbon nanotube composites
Flexible gel-state thermoelectrochemical materials with excellent mechanical and thermoelectric performances based on incorporating Sn2+/Sn4+ electrolyte in polymer/carbon nanotube composites
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基于将 Sn2 /Sn4 电解质纳入聚合物/碳纳米管复合材料中的柔性凝胶态热电化学材料，具有优异的机械和热电性能
DOI：
10.1039/c7ta11146k
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发表时间：
2018
影响因子：
11.9
通讯作者：
Guangming Chen
中科院分区：
文献类型：
--
作者：
Guangbao Wu;Yufeng Xue;Lei Wang;Xin Wang;Guangming Chen
热电化学(TEC)材料是近年来发展起来的一种新型能源材料，在利用氧化还原电解液回收废热能方面具有广阔的应用前景。然而，液态电解液和较低的热电性能严重限制了它们的应用。本文报道了首次将Sn2+/Sn4+电解质掺杂到聚合物/单壁碳纳米管(SWCNT)复合材料中的凝胶态TEC(Gel-TEC)材料。观察到了多孔的三维网络形态，并研究了SWCNT含量对拉伸力学性能和TE性能的影响。由于其较大的塞贝克系数和显著提高的电导率(10.5±0.8 S m−1)，室温下的功率因数可达13.5±3.0μW m−1 K−2，大于液态热电材料，可能是凝胶热电材料中最高的。Gel-TEC材料的凝胶态、优异的力学性能和优良的TE性能将加快和扩大其在柔性器件、可穿戴电子产品、电子皮肤等领域的应用。
Thermoelectrochemical (TEC) materials are newly developed energy materials, which are promising and cost-effective in harvesting waste thermal energy based on redox electrolytes. However, liquid-state electrolytes and low thermoelectric (TE) performance seriously limit their application. Here, we report the first gel-state TEC (gel-TEC) materials based on incorporating Sn2+/Sn4+ electrolytes into polymer/single-wall carbon nanotube (SWCNT) composites. A porous 3D network morphology is observed, and the effect of SWCNT content on the tensile mechanical properties and TE performance is studied. Due to their large Seebeck coefficients and significantly enhanced electrical conductivities (10.5 ± 0.8 S m−1), the power factor at room temperature can reach 13.5 ± 3.0 μW m−1 K−2, greater than those of liquid-state TEC materials and possibly the highest for gel-TEC materials. The gel-state, outstanding mechanical properties and excellent TE performance of the gel-TEC materials will speed up and widen their application in various fields such as flexible devices, wearable electronics, e-skins, etc.