MXenes公司
材料科学
过电位
纳米技术
电催化剂
析氧
化学工程
锂(药物)
制作
储能
碳纤维
氢气储存
复合数
电极
复合材料
化学
电化学
合金
内分泌学
工程类
医学
功率(物理)
替代医学
物理
物理化学
病理
量子力学
作者
Xianhong Wu,Zhiyu Wang,Mengzhou Yu,Luyang Xiu,Jieshan Qiu
标识
DOI:10.1002/adma.201607017
摘要
The MXenes combining hydrophilic surface, metallic conductivity and rich surface chemistries represent a new family of 2D materials with widespread applications. However, their poor oxygen resistance causes a great loss of electronic properties and surface reactivity, which significantly inhibits the fabrication, the understanding of the chemical nature and full exploitation of the potential of MXene‐based materials. Herein we report a facile carbon nanoplating strategy for efficiently stabilizing the MXenes against structural degradation caused by spontaneous oxidation, which provides a material platform for developing MXene‐based materials with attractive structure and properties. Hierarchical MoS 2 /Ti 3 C 2 ‐MXene@C nanohybrids with excellent structural stability, electrical properties and strong interfacial coupling are fabricated by assembling carbon coated few‐layered MoS 2 nanoplates on carbon‐stabilized Ti 3 C 2 MXene, exhibiting exceptional performance for Li storage and hydrogen evolution reaction (HER). Remarkably, ultra‐long cycle life of 3000 cycles with high capacities but extremely slow capacity loss of 0.0016% per cycle is achieved for Li storage at a very high rate of 20 A g −1 . They are also highly active HER electrocatalyst with very positive onset potential, low overpotential and long‐term stability in acidic solution. Superb properties highlight the great promise of MXene‐based materials in cornerstone applications of energy storage and conversion.
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