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Stabilizing the MXenes by Carbon Nanoplating for Developing Hierarchical Nanohybrids with Efficient Lithium Storage and Hydrogen Evolution Capability
Author(s) -
Wu Xianhong,
Wang Zhiyu,
Yu Mengzhou,
Xiu Luyang,
Qiu Jieshan
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201607017
Subject(s) - mxenes , materials science , hydrogen storage , lithium (medication) , carbon fibers , nanotechnology , chemical engineering , composite material , composite number , biology , alloy , endocrinology , engineering
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.