Suppressing Li Metal Dendrites Through a Solid Li‐Ion Backup Layer
Abstract
The growing demand for sustainable and off‐grid energy storage is reviving the attempts to use Li metal as the anode in the next generation of batteries. However, the use of Li anodes is hampered due to the growth of Li dendrites upon charging and discharging, which compromises the life and safety of the battery. Here, it is shown that lithiated multiwall carbon nanotubes (Li‐MWCNTs) act as a controlled Li diffusion interface that suppresses the growth of Li dendrites by regulating the Li+ ion flux during charge/discharge cycling at current densities between 2 and 4 mA cm−2. A full Li‐S cell is fabricated to showcase the versatility of the protected Li anode with the Li‐MWCNT interface, where the full cells could support pulse discharges at high currents and over 450 cycles at different rates with coulombic efficiencies close to 99.9%. This work indicates that carbon materials in lithiated forms can be an effective and simple approach to the stabilization of Li metal anodes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 17, 2018
- Source ID
- 10.1002/adma.201803869
Entities
People
- Ah‐lim Tsai
- Almaz S. Jalilov
- Gang Wu
- Gladys A. López‐silva
- James Tour
- Jongwon Yoon
- Rodrigo V. Salvatierra
Organizations
- Air Force Office of Scientific Research
- Consejo Nacional de Humanidades, Ciencias y Tecnologías
- National Council for Scientific and Technological Development
- National Institutes of Health
- Rice University
- University of Texas at Austin