Zhao Xiaoying, Liu Ningbo, Mu Chaonan, Qin Bin, Wang Liubin
College of Chemistry & Materials Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding 071002, China.
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.
J Colloid Interface Sci. 2024 Sep;669:647-656. doi: 10.1016/j.jcis.2024.05.028. Epub 2024 May 8.
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.
由于具有高理论容量，合金型负极材料被认为是钠离子电池（SIBs）的有前途的候选材料。然而，它们的应用受到钠嵌入/脱出过程中剧烈体积变化导致的严重容量衰减的限制。在此，通过一种简便的金属有机框架（MOFs）衍生方法成功合成了包裹在碳骨架中的铅纳米球（Pb@C），并用作SIBs的负极。纳米级的铅颗粒均匀地融入多孔碳框架中，有效减轻了体积变化，并增强了充放电过程中的钠离子传输。受益于这种独特的结构，在2 A g电流下循环6000次后，可逆容量达到334.2 mAh g，对应令人印象深刻的88.2%的容量保持率，每次循环的容量损失最小为0.00748%。此外，构建了高性能的Pb@C//NVPF全钠离子电池，展示了291 Wh kg的高能量密度和175 W kg的功率密度。这种简便的MOFs衍生方法为使用铅源设计高容量合金型负极材料提供了思路，为铅回收和污染预防的创新方法开辟了新的可能性。
