Shu Qiang, Hou Xiaojiang, Cao Qianhong, Ye Xiaohui, Li Danting, Zhao Duode, Wang Chenlu, Yang Guang, Xie Lishuai, Suo Guoquan
School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China.
College of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
ACS Appl Mater Interfaces. 2024 May 8;16(18):23724-23733. doi: 10.1021/acsami.4c01918. Epub 2024 Apr 24.
In this study, we present a strategic approach for the structural design and composite modification of one-dimensional Sn-based nanocomposites to enhance the overall electrochemical performance of hybrid magnesium-lithium batteries (MLIBs), which are emerging as promising successors to lithium-ion batteries. By using electrospinning technology, we successfully synthesized NST-SnO, NST-SnO-NiO, Sn-CNF, and NiSn-CNF composite cathodes, as well as analyzed the synthesis mechanism of the four Sn-based cathodes. The 100-cycle testing at a current density of 500 mA·g revealed that NST-SnO maintained a discharge specific capacity of 129.8 mA h·g with a retention rate of 90.76%, while NST-SnO-NiO achieved a higher capacity of 147.4 mA h·g and an 88.05% retention rate. Notably, Sn-CNF and NiSn-CNF exhibited initial discharge capacities of 66.7 and 79.6 mA h·g, respectively, coupled with exceptional cycle stability, evidenced by retention rates of 104.19 and 102.38%. The remarkable cycling stability observed in these novel cathodes is attributed to their robust structural integrity, thus demonstrating the potential for an extended cycle life in MLIBs. This work provides significant advancement in the development of high-performance electrode materials for next-generation hybrid magnesium-lithium energy storage systems.
在本研究中，我们提出了一种用于一维锡基纳米复合材料结构设计和复合改性的策略方法，以提高混合镁锂电池（MLIBs）的整体电化学性能，混合镁锂电池正成为锂离子电池有前景的继任者。通过使用静电纺丝技术，我们成功合成了NST-SnO、NST-SnO-NiO、Sn-CNF和NiSn-CNF复合阴极，并分析了四种锡基阴极的合成机理。在500 mA·g的电流密度下进行的100次循环测试表明，NST-SnO保持了129.8 mA h·g的放电比容量，保留率为90.76%，而NST-SnO-NiO实现了更高的容量，为147.4 mA h·g，保留率为88.05%。值得注意的是，Sn-CNF和NiSn-CNF的初始放电容量分别为66.7和79.6 mA h·g，同时具有出色的循环稳定性，保留率分别为104.19%和102.38%，证明了这一点。在这些新型阴极中观察到的显著循环稳定性归因于它们强大的结构完整性，从而证明了MLIBs具有延长循环寿命的潜力。这项工作为下一代混合镁锂储能系统高性能电极材料的开发取得了重大进展。
