AI Article Synopsis
- Alloying-type anode materials like Pb nanospheres in a carbon framework show promise for sodium-ion batteries due to their high capacities but face challenges from volume changes during ion processes.
- The synthesized Pb@C structure reduces volume changes and improves Na ion transport, achieving a remarkable 334.2 mAh/g capacity with 88.2% retention after 6000 cycles.
- This method not only demonstrates high-performance in sodium-ion batteries but also offers potential pathways for Pb recycling and reducing pollution.
Article Abstract
Alloying-type anode materials are considered promising candidates for sodium-ion batteries (SIBs) due to their high theoretical capacities. However, their application is limited by the severe capacity decay stemming from dramatic volume changes during Na insertion/extraction processes. Here, Pb nanospheres encapsulated in a carbon skeleton (Pb@C) were successfully synthesized via a facile metal-organic frameworks (MOFs)-derived method and used as anodes for SIBs. The nanosized Pb particles are uniformly incorporated into the porous carbon framework, effectively mitigating volume changes and enhancing Na ion transport during discharging/charging. Benefiting from this unique architecture, a reversible capacity of 334.2 mAh g at 2 A g is achieved after 6000 cycles corresponding to an impressive 88.2 % capacity retention and a minimal capacity loss of 0.00748 % per cycle. Furthermore, a high-performance full sodium-ion battery of Pb@C//NVPF was constructed, demonstrating a high energy density of 291 Wh kg and power density of 175 W kg. This facile MOFs-derived method offers insights into the design of high-capacity alloy-type anode materials using Pb sources, opening up new possibilities for innovative approaches to Pb recycling and pollution prevention.
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| http://dx.doi.org/10.1016/j.jcis.2024.05.028 | DOI Listing |
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