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Laser-sculptured ultrathin transition metal carbide layers for energy storage and energy harvesting applications.

  • Zang X Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA. xzang@mit.edu.
  • Jian C Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Zhu T Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Fan Z Department of Engineering Technology, University of Houston, Houston, TX, 77204, USA.
  • Wang W College of Electronic Science and Technology, Shenzhen University, 518060, Shenzhen, China.
  • Wei M Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Li B Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Follmar Diaz M Micro and Nanosystems, D-MAVT, ETHZ, Zürich, CH - 8092, Switzerland.
  • Ashby P Molecular Foundry, Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA.
  • Lu Z Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Chu Y Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Wang Z School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
  • Ding X Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Xie Y Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Chen J Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA.
  • Hohman JN Molecular Foundry, Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA.
  • Sanghadasa M Aviation and Missile Center, U.S. Army Combat Capabilities Development Command, Redstone Arsenal, AL, 35898, USA.
  • Grossman JC Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA. jcg@mit.edu.
  • Lin L Mechanical Engineering & Berkeley Sensor and Actuator Center, University of California Berkley, Berkeley, CA, 94704, USA. lwlin@berkeley.edu.
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  • 2019-07-17
Published in:
  • Nature communications. - 2019
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy
General Chemistry
English Ultrathin transition metal carbides with high capacity, high surface area, and high conductivity are a promising family of materials for applications from energy storage to catalysis. However, large-scale, cost-effective, and precursor-free methods to prepare ultrathin carbides are lacking. Here, we demonstrate a direct pattern method to manufacture ultrathin carbides (MoCx, WCx, and CoCx) on versatile substrates using a CO2 laser. The laser-sculptured polycrystalline carbides (macroporous, ~10-20 nm wall thickness, ~10 nm crystallinity) show high energy storage capability, hierarchical porous structure, and higher thermal resilience than MXenes and other laser-ablated carbon materials. A flexible supercapacitor made of MoCx demonstrates a wide temperature range (-50 to 300 °C). Furthermore, the sculptured microstructures endow the carbide network with enhanced visible light absorption, providing high solar energy harvesting efficiency (~72 %) for steam generation. The laser-based, scalable, resilient, and low-cost manufacturing process presents an approach for construction of carbides and their subsequent applications.
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  • English
Open access status
gold
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https://sonar.ch/global/documents/122316
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