Methanol and Diethanolamine Assisted Synthesis of Flexible Nitrogen-Doped Ti3C2 (MXene) Film for Ultrahigh Volumetric Performance Supercapacitor Electrodes
Methanol and Diethanolamine Assisted Synthesis of Flexible Nitrogen-Doped Ti3C2 (MXene) Film for Ultrahigh Volumetric Performance Supercapacitor Electrodes
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甲醇和二乙醇胺辅助合成用于超高体积性能超级电容器电极的柔性掺氮 Ti3C2 (MXene) 薄膜
DOI：
10.1021/acsaem.9b01815
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发表时间：
2020-01
影响因子：
6.4
通讯作者：
Que Wenxiu
中科院分区：
文献类型：
--
作者：
Yang Chenhui;Tang Yi;Tian Yapeng;Luo Yangyang;Yin Xingtian;Que Wenxiu
为了获得更好的碳化钛（MXene）的氮掺杂效果，选择具有高流动性和较小小分子尺寸的甲醇（MT）溶剂来辅助二乙醇胺（DEA）在Ti 3C 2薄片中的氮引入，从而获得柔性的、自支撑的、和致密的氮掺杂的Ti 3C 2（简称MD-Ti 3C 2）薄膜可作为高性能超级电容器电极。结果表明，由于液态N掺杂源DEA和高流动性MT的混合溶剂的综合作用，MD-Ti 3C 2膜电极在5 mV s-1的扫描速率下表现出3123 F cm-3的优异电容性能，并具有良好的稳定性（在10000次充电-放电循环后初始电容保持100%），这比MXene和氮掺杂的碳基材料更有利。其原因可能与MD-Ti 3C 2薄膜的层状结构、合适的氮元素、较高的比表面积、润湿性和导电性以及丰富的导电孔道有关，有利于更多的阳离子嵌入MD-Ti 3C 2薄膜。最后，MT作为一种有效的辅助溶剂，与氮源DEA配合使用，通过优化原位氮掺杂工艺，可适用于改善二元金属碳化物（MXene）的电化学性能。
To acquire better nitrogen doping results of titanium carbides (MXenes), methanol (MT) solvent with high fluidity and smaller micromolecule size is selected to assist the introduction of nitrogen of diethanolamine (DEA) in the Ti3C2flakes, and thus, the flexible, free-standing, and compact nitrogen-doped Ti3C2(abbreviated as MD-Ti3C2) film can be obtained by the facileex situsolvothermal method as high-performance supercapacitor electrode. Results indicate that due to an integrated effect of the mixed solvents with liquid N-doping source DEA and high fluidity MT, the MD-Ti3C2film electrode shows an outstanding capacitive performance of 3123 F cm–3at a scan rate of 5 mV s–1and excellent stability (∼100% retention of initial capacitance after 10 000 charging–discharging cycles), which is more advantageous than MXenes and nitrogen-doped carbon-based materials. The possible reasons should be related to the layered structure, suitable nitrogen element, relatively high surface area, wettability, and conductivity, as well as rich and conductive pores channels, which are conducive to the intercalation of more cations in the MD-Ti3C2film. Finally, MT as an effective auxiliary solvent with nitrogen source DEA can be suitable for improving the electrochemical performance of binary metal carbides (MXenes) through optimization of theex situnitrogen doping process.
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影响因子：
27.8
作者：
Y. Yoon;Minhe Lee;S. Kim;Garam Bae;Wooseok Song;S. Myung;Jongsun Lim;S. Lee;Tae-Hyung Zyung;K. An
通讯作者：
Y. Yoon;Minhe Lee;S. Kim;Garam Bae;Wooseok Song;S. Myung;Jongsun Lim;S. Lee;Tae-Hyung Zyung;K. An
影响因子：
9.2
作者：
Yiliang Wang;Huaqing Xuan;Gaoxin Lin;Fan Wang;Zhi Chen;Xiaoping Dong
通讯作者：
Yiliang Wang;Huaqing Xuan;Gaoxin Lin;Fan Wang;Zhi Chen;Xiaoping Dong
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影响因子：
9.5
作者：
Tan, Yueming;Xu, Chaofa;Yao, Shouzhuo
通讯作者：
Yao, Shouzhuo
影响因子：
17.6
作者：
Xie, Xiuqiang;Zhao, Meng-Qiang;Gogotsi, Yury
通讯作者：
Gogotsi, Yury
影响因子：
4.6
作者：
Rakhi RB;Nayak P;Xia C;Alshareef HN
通讯作者：
Alshareef HN