Amplified Thermopower Waves in Large‐Area Carbon–Nanotube/Fuel Composites via Thermal Decomposition of Sodium Nitrate
Amplified Thermopower Waves in Large‐Area Carbon–Nanotube/Fuel Composites via Thermal Decomposition of Sodium Nitrate
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DOI：
10.1002/admi.201600908
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发表时间：
2017-03
影响因子：
5.4
通讯作者：
H. Hwang;Dongjoon Shin;Taehan Yeo;Wonjoon Choi
中科院分区：
文献类型：
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作者：
H. Hwang;Dongjoon Shin;Taehan Yeo;Wonjoon Choi
微纳米技术的进步伴随着开发新能源的需求。热功波（TW）利用微纳米结构材料周围高能量密度燃料的燃烧，可以在小范围内实现化学能-热能-电能的直接转换，是下一代器件的潜在能源。在此，增强TW的硝酸钠的分解，为额外的热能和电荷供应商在燃烧中的报告。制备了含和不含NaNO 3晶体的碳纳米管和硝化纤维素杂化复合材料作为行波发生器。通过NaNO 3晶体分解提供的热能和电子将电压（23.3 Ω电阻时为1.732 mV）和电流放大了7倍，而没有NaNO 3晶体的复合材料则增加了90 °C的最高燃烧温度。通过对行波管内阻和电流动态变化的真实的实时分析，可以阐明混合复合材料产生的能量增强的原因。在这项工作中，通过分解电荷供应者获得的先进TW将有助于促进基于TW的设备的进一步开发，并有助于理解微纳米结构材料与小规模燃烧之间相互作用的基本物理学。
Advancement of micro‐nanotechnology has accompanied the need for developing new energy sources. Thermopower waves (TWs), which use the combustion of high‐energy‐density fuels surrounding micro‐nanostructured materials, can implement the direct conversion between chemical–thermal–electrical energy on a small scale as a potential energy source for the next‐generation devices. Herein, the enhancement of TWs by the decomposition of sodium nitrate for additional thermal energy and charge suppliers in combustion is reported. The hybrid composites of carbon nanotubes and nitrocellulose with and without NaNO3 crystals are prepared as TWs generators. The thermal energy and electrons supplied through the decomposition of NaNO3 crystals amplify the voltage (≈732 mV at 23.3 Ω electrical resistance) and current by a factor of seven compared to the composite without NaNO3 crystals, while the maximum temperature in combustion is increased by 90 °C. The real‐time analyses of the dynamic change of the internal resistance and current for TWs can elucidate the origin of the enhanced energy generated using the hybrid composites. The advanced TWs obtained by the decomposition of the charge suppliers in this work will contribute to facilitating further development of TW‐based devices and understanding the underlying physics of the interaction between micro‐nanostructured materials and combustion on a small scale.