Duan Zheng, Luo Yufeng, Luo Zhiling, Yu Wei, Liu Changhong, Fan Shoushan
Tsinghua-Foxconn Nanotechnology Research Center, Department of Physics, Tsinghua University Beijing 100084 China
RSC Adv. 2019 Mar 6;9(14):7629-7634. doi: 10.1039/c9ra00151d.
In recent years, carbon nanotube/polyaniline (CNT/PANI) nanocomposites have aroused much interest because of their broad application prospects as electrodes in supercapacitors and batteries. However, a great deal of heat can be generated during fast charging and discharging processes and this can influence the efficiency of devices. In this paper, we measured the thermal properties of CNT/PANI in different oxidation states. The results indicate that within an electric potential range from -0.4 V to +0.4 V, both the thermal diffusivity and the thermal conductivity decrease obviously with potential due to the successive loss of electrons from PANI. Losing protons at higher voltages leads to a reduction in thermal conductivity but a jump in thermal diffusivity. The composite material provides an example for studying the influence of the loss or gain of electrons and protons on the thermal properties of a polymer. It also provides a superb system for thermal management through electric potential.
近年来，碳纳米管/聚苯胺（CNT/PANI）纳米复合材料因其在超级电容器和电池电极方面广阔的应用前景而备受关注。然而，在快速充放电过程中会产生大量热量，这会影响器件的效率。在本文中，我们测量了不同氧化态下CNT/PANI的热性能。结果表明，在-0.4 V至+0.4 V的电势范围内，由于聚苯胺连续失去电子，热扩散率和热导率均随电势明显降低。在较高电压下失去质子会导致热导率降低，但热扩散率会跃升。该复合材料为研究电子和质子的得失对聚合物热性能的影响提供了一个实例。它还为通过电势进行热管理提供了一个极佳的系统。
