Heteroanionic 化 TiBTx MBene 保护层 具有双功能的性和疏水性特征,用于无树的阳极
Qing Shen1, Jinming Wang1, Zhouru He1
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P.R. China.
研究人员使用半径异构化策略开发了新的异构二维 (2D) 六角过渡金属化物 (h-MBenes). 这些新材料创造了友和水的环境,大大提高了储能装置中的阳极性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 两维 (2D) 六角过渡金属化物 (h-MBenes) 显示为储能中的金属阳极的保护层具有前途.
- 传统的h-MBenes遭受含氧终结,导致水友性和树脂的生长,这损害了电极性能.
- 现有的合成方法限制了对表面终端的精确控制,阻碍了h-MBene特性的优化.
研究的目的:
- 开发一种新的合成h-MBenes的新方法,其表面末端为增强金属阳极保护而定制.
- 研究混合素功能化对h-MBenes的友性和疏水性的影响.
- 评估改性h-MBenes作为水性电解质中阳极的保护层的电化学性能.
主要方法:
- 使用素半径异构化策略合成异素TiBTX (TX = Cl和I) h-MBenes.
- 合成材料的表征,以确认混合素功能和表面性能.
- 电化学测试,包括循环性能和库伦比效率测量,用于TiBTX涂层阳极和全袋电池.
主要成果:
- 成功合成了具有精确混合基功能化的新型异质基TiBTXh-MBenes.
- 混合基终端产生了超高性和疏水性微环境,促进了有序的Zn2+吸附.
- 双功能TiBTx-31层实现了超过2000小时的循环寿命,平均库伦比效率为99.86%,一个完整的细胞在100个循环中保持了95.3%的容量.
结论:
- 半径异构化策略是h-MBenes界面工程的一个有效方法.
- 调整素终端显著提高了阳极稳定性和水性电解质中的电化学性能.
- 这项工作为开发基于h-MBenes的高性能能量存储设备提供了新的见解.
更多相关视频
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
12:30Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
相关概念视频
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
Alkyl Halides
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Halogenation of Alkenes
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Reactions at the Benzylic Position: Halogenation
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Halogens
