Journal article
MXene‐Based Dendrite‐Free Potassium Metal Batteries
Advanced materials (Weinheim), v 32(4), pp e1906739-n/a
28 Jan 2020
PMID: 31782559
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Potassium metal batteries are considered as attractive alternatives beyond lithium‐ion batteries. However, uncontrollable dendrite growth on the potassium metal anode has restrained their practical applications. A high‐performance potassium anode achieved by confining potassium metal into a titanium‐deficient nitrogen‐containing MXene/carbon nanotube freestanding scaffold is reported. The high electronic transport and fast potassium diffusion in this scaffold enable reduced local current density and homogeneous ionic flux during plating/stripping processes. Furthermore, as verified by theoretical calculations and experimental investigations, such “potassium‐philic” MXene sheets can induce the nucleation of potassium, and guide potassium to uniformly distribute in the scaffold upon cycling. Consequently, the as‐developed potassium metal anodes exhibit a dendrite‐free morphology with high Coulombic efficiency and long cycle life during plating/stripping processes. Such anodes also deliver significantly improved electrochemical performances in potassium–sulfur batteries compared with bare potassium metal anodes. This work can provide a new avenue for developing potassium metal‐based batteries.
A high‐performance potassium‐metal anode is developed by confining potassium metal into a titanium‐deficient and nitrogen‐containing MXene/carbon nanotube freestanding scaffold. These potassium‐metal anodes exhibit a dendrite‐free morphology with high Coulombic efficiency and long cycle life during plating/stripping processes.
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Details
- Title
- MXene‐Based Dendrite‐Free Potassium Metal Batteries
- Creators
- Xiao Tang - University of Technology SydneyDong Zhou - University of Technology SydneyPeng Li - Nanjing University of Aeronautics and AstronauticsXin Guo - University of Technology SydneyBing Sun - University of Technology SydneyHao Liu - University of Technology SydneyKang Yan - University of Technology SydneyYury Gogotsi - Drexel UniversityGuoxiu Wang - University of Technology Sydney
- Publication Details
- Advanced materials (Weinheim), v 32(4), pp e1906739-n/a
- Publisher
- Wiley
- Number of pages
- 11
- Grant note
- Australian Renewable Energy Agency (2014/RND106) Australian Research Council (DP170100436) China Scholarship Council (201606840117) Rail Manufacturing CRC projects (R1.1.1; R1.1.2)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000499286100001
- Scopus ID
- 2-s2.0-85075740785
- Other Identifier
- 991014878117304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter