用于高性能超级电容的钛箔上的氮化钛纳米片阵列
TiN nanosheet arrays on Ti foils for high-performance supercapacitance.
作者信息
Wang Cong, Zhou Peng, Wang Zeyan, Liu Yuanyuan, Wang Peng, Qin Xiaoyan, Zhang Xiaoyang, Dai Ying, Whangbo Myung-Hwan, Huang Baibiao
机构信息
State Key Laboratory of Crystal Materials, Shandong University Jinan 250100 China
School of Physics, Shandong University Jinan 250100 China.
出版信息
RSC Adv. 2018 Apr 4;8(23):12841-12847. doi: 10.1039/c8ra01001c. eCollection 2018 Apr 3.
A simple template-free method of preparing mesoporous TiN nanostructures directly on Ti foils is developed by combining hydrothermal, ion exchange and nitridation reactions. The as-prepared TiN nanosheet arrays on Ti foils can be directly used as an electrode without any subsequent processing, and are found to be a good capacitance material. The specific capacitance of the TiN nanosheets electrode measured at the current density of 0.5 A g reaches 81.63 F g, and the capacitance retention is still 75% after 4000 cycles. The symmetric supercapacitor made up of two TiN nanosheet electrodes sandwiching a solid electrolyte (polyvinyl alcohol in KOH) shows a specific capacitance of 0.42 F cm, and retains 77.6% of the capacitance even at the current density of 12.5 mA cm.
通过结合水热、离子交换和氮化反应，开发了一种直接在钛箔上制备介孔氮化钛纳米结构的简单无模板方法。所制备的钛箔上的氮化钛纳米片阵列无需任何后续处理即可直接用作电极，并且被发现是一种良好的电容材料。在0.5 A g的电流密度下测量的氮化钛纳米片电极的比电容达到81.63 F g，并且在4000次循环后电容保持率仍为75%。由两个夹着固体电解质（KOH中的聚乙烯醇）的氮化钛纳米片电极组成的对称超级电容器显示出0.42 F cm的比电容，即使在12.5 mA cm的电流密度下也能保持77.6%的电容。
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