聚苯胺包覆碳纳米管毡的力学和电化学性能
The mechanical and electrochemical properties of polyaniline-coated carbon nanotube mat
摘要：
碳纳米管-聚苯胺（CNT-PANI）复合电极的电容，模量和强度的测量使他们成为有前途的候选人的结构储能装置。在这里，CNT-PANI复合电极是通过将PANI电沉积到通过浮动催化剂化学气相沉积工艺产生的CNT垫的束网络上来制造的。PANI占电极体积的0%至30%。在初始状态、第一次充电后和1000次充电/放电循环后测量电极的组成、模量、强度和电容。电极模量和强度随着CNT体积分数的增加而增加;相反，电容随着PANI质量的增加而增加。充电或循环降低电极模量和强度，由于膨胀引起的CNT束体积分数的降低;电极电容也由于PANI质量的降低而降低。微机械模型能够基于预充电和循环后电极的测量组成来预测预充电和循环电极的应力-应变响应。电极具有高达63%的理论电容，其拉伸强度与工程合金相当。在1000次充电/放电循环后，它们的电容和强度下降小于15%。这些特性说明了它们作为结构储能装置的潜力。
英文摘要：
The measured capacitance, modulus and strength of carbon nanotube-polyaniline (CNT-PANI) composite electrodes render them promising candidates for structural energy storage devices. Here, CNT-PANI composite electrodes are manufactured with electrodeposition of PANI onto the bundle network of CNT mats produced via a floating catalyst chemical vapour deposition process. PANI comprises 0% to 30% by volume of the electrode. The composition, modulus, strength and capacitance of the electrodes is measured in the initial state, after the first charge, and after 1000 charge/discharge cycles. Electrode modulus and strength increase with increasing CNT volume fraction; in contrast, the capacitance increases with increasing PANI mass. Charging or cycling reduce the electrode modulus and strength due to a decrease in CNT bundle volume fraction caused by swelling; the electrode capacitance also decreases due to a reduction in PANI mass. A micromechanical model is able to predict the stress-strain response of pre-charged and cycled electrodes, based upon their measured composition after pre-charging and cycling. The electrodes possess up to 63% of their theoretical capacitance, and their tensile strengths are comparable to those of engineering alloys. Their capacitance and strength decrease by less than 15% after the application of 1000 charge/discharge cycles. These properties illustrate their potential as structural energy storage devices.
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