Abstract
Three-dimensional (3D) current collectors have shown great potential in realizing dendrite-free lithium (Li) metal anodes. However, the rigid 3D current collectors could not simultaneously suppress Li dendrite growth and allow Li plating/stripping under high capacities and large current densities. Here, we report a dynamic intelligent Cu (DICu) current collector that dynamically accommodates the volume change by changing the packing density of the assembled particles. The Li/DICu electrode achieves a high Coulombic efficiency of 99.6% after 800 cycles. The symmetrical cell shows exceptional cycling stability under the high current density of 10 mA cm-2. Notably, when assembled in full-cell batteries, the Li/DICu|LiFePO4 battery maintains a specific capacity of 139.5 mAh g-1 at 1 C for 500 cycles, and the Li/DICu|S battery delivers a specific capacity of 804 mAh g-1 after 500 cycles at 0.5 C, corresponding to the best performance among Li metal batteries with Cu-based current collectors to date.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3403-3410 |
| Number of pages | 8 |
| Journal | Nano Letters |
| Volume | 20 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 13 2020 |
Bibliographical note
Funding Information:This work is jointly supported by NSFC (51772157, 51802161, and 21820102002), Priority Academic Program Development of Jiangsu Higher Education Institutions, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Synergistic Innovation Center for Organic Electronics and Information Displays, Qing Lan Project of Jiangsu Province.
Publisher Copyright:
© 2020 American Chemical Society.
Keywords
- Cu current collectors
- Dynamic intelligent structure
- Li dendrites
- Li metal anodes
- Ultrastable performance
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering