|
| Dendrite-suppressed, long-cycle-life lithium metal anode based on nitrogen-doped graphene |
|
Received:August 08, 2025
Revised:September 29, 2025
Accepted:October 21, 2025
Published Online:April 30, 2026
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1005-7854.2025.05.012 |
| KeyWord:Graphite;Lithium metal anode;Nitrogen-doped graphene;Lithium dendrite suppression;Nucleation overpotential;Long-cycle life;Graphite anode materials |
|
1.China Minmetals (Heilongjiang)
Graphite Industry Co. Ltd., Hegang 154101, Heilongjiang, China;2.Minerals Exploration and Development Co.Ltd., Beijing 100010, China |
| Hits: 9 |
| Download times: 5 |
| Abstract: |
| In this study, nitrogen-doped graphene was synthesized from Heilongjiang Yunshan natural graphite via a urea-assisted pyrolysis method, and its electrochemical performance as a lithium metal deposition substrate was systematically evaluated. Results demonstrate that the incorporation of pyridinic and pyrrolic nitrogen through doping significantly enhances the lithiophilicity of the material, reducing the lithium nucleation overpotential from 20 mV on copper foil to 12 mV, thereby promoting uniform lithium deposition. After 200 cycles at 1 mA·cm?2 and 1 mAh·cm?2, the coulombic efficiency of the nitrogen-doped graphene remains as high as 99.5%; even under a high rate condition of 3 mA·cm?2 and 1 mAh·cm?2 for 100 cycles, the efficiency reaches 98.5%, far surpassing the early failure observed with the copper foil electrode. By establishing a synergistic mechanism of "site regulation and structural buffering", the nitrogen-doped graphene effectively suppresses dendrite growth, accommodates volume variation, and enhances interfacial stability. This work provides a new strategy for advancing the practical application of lithium metal anodes, while also opening a new pathway for high-value utilization and industrial upgrading of natural graphite. |
| Close |
|
|
|