Cui Yu, Wang Jie, Wang Xin, Qin Jinwen, Cao Minhua
Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Chem Asian J. 2020 Apr 17;15(8):1376-1383. doi: 10.1002/asia.202000017. Epub 2020 Mar 23.
A facile hybrid assembly between Ti C T MXene nanosheets and (3-aminopropyl) triethoxylsilane-modified Si nanoparticles (NH -Si NPs) was developed to construct multilayer stacking of Ti C T nanosheets with NH -Si NPs assembling together (NH -Si/Ti C T ). NH -Si/Ti C T exhibits a significantly enhanced lithium storage performance compared to pristine Si, which is attributed to the robust crosslinking architecture and considerably improved electrical conductivity as well as shorter Li diffusion pathways. The optimized NH -Si/Ti C T anode with Ti C T : NH -Si mass ratio of 4 : 1 displays an enhanced capacity (864 mAh g at 0.1 C) with robust capacity retention, which is significantly higher than those of NH -Si NPs and Ti C T anodes. Furthermore, this work demonstrates the important effect of the MXene-based electrode architecture on the electrochemical performance and can guide future work on designing high-performance Si/MXene hybrids for energy storage applications.
开发了一种简便的方法，使Ti C T MXene纳米片与（3-氨丙基）三乙氧基硅烷修饰的硅纳米颗粒（NH -Si NPs）进行混合组装，以构建Ti C T纳米片与NH -Si NPs组装在一起的多层堆叠结构（NH -Si/Ti C T）。与原始硅相比，NH -Si/Ti C T表现出显著增强的锂存储性能，这归因于其坚固的交联结构、显著提高的电导率以及更短的锂扩散路径。Ti C T与NH -Si质量比为4 : 1的优化NH -Si/Ti C T阳极显示出增强的容量（在0.1 C时为864 mAh g）和稳定的容量保持率，显著高于NH -Si NPs和Ti C T阳极。此外，这项工作证明了基于MXene的电极结构对电化学性能的重要影响，并可为未来设计用于储能应用的高性能Si/MXene复合材料的工作提供指导。
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