Interest in eco-friendly materials with high efficiencies is increasing significantly as science and technology undergo a paradigm shift toward environment-friendly and sustainable development. MXenes, a class of two-dimensional inorganic compounds, are generally defined as transition metal carbides or nitrides composed of few-atoms-thick layers with functional groups. Recently MXenes, because of their desirable electrical, thermal, and mechanical properties that emerge from conductive layered structures with tunable surface terminations, have garnered significant attention as promising candidates for energy storage applications (e.g., supercapacitors and electrode materials for Li-ion batteries), water purification, and gas sensors. In this review, we introduce MXenes and describe their properties and research trends by classifying them into two main categories: transition metal carbides and nitrides, including Ti-based MXenes, Mo-based MXenes, and Nb-based MXenes.

Abstract
1. 서 론
2. MXenes의 개요
3. MXenes의 조성별 연구동향
    3.1. 탄화물계 MXenes
    3.2. 질화물계 MXenes
4. 맺음말
References

• 이호준(서울과학기술대학교 신소재공학과) | Hojun Lee (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 윤예준(서울과학기술대학교 신소재공학과) | Yejun Yun (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 장진광(서울과학기술대학교 신소재공학과) | Jinkwang Jang (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
• 변종민(서울과학기술대학교 신소재공학과/서울과학기술대학교 분말기술연구소) | Jongmin Byun (Department of Materials Science and Engineering, Seoul National University of Science and Technology/The Institute of Powder Technology, Seoul National University of Science and Technology) Corresponding Author