Assembly: A Key Enabler for the Construction of Superior Silicon‐Based Anodes. Issue 30 (31st August 2022)

• Record Type: Journal Article
• Authors: Jiang, Miaomiao; Chen, Junliang; Zhang, Yingbing; Song, Nan; Jiang, Wan; Yang, Jianping
• Is Part Of: Advanced science. Volume 9:Issue 30(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-31
• Subjects: assembly mechanisms -- assembly methodologies -- lithium‐ion batteries -- nanocrystallization and compound strategies -- silicon‐based anodes; Science -- Periodicals; 505
• DOI: 10.1002/advs.202203162
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: Silicon (Si) is regarded as the most promising anode material for high‐energy lithium‐ion batteries (LIBs) due to its high theoretical capacity, and low working potential. However, the large volume variation during the continuous lithiation/delithiation processes easily leads to structural damage and serious side reactions. To overcome the resultant rapid specific capacity decay, the nanocrystallization and compound strategies are proposed to construct hierarchically assembled structures with different morphologies and functions, which develop novel energy storage devices at nano/micro scale. The introduction of assembly strategies in the preparation process of silicon‐based materials can integrate the advantages of both nanoscale and microstructures, which significantly enhance the comprehensive performance of the prepared silicon‐based assemblies. Unfortunately, the summary and understanding of assembly are still lacking. In this review, the understanding of assembly is deepened in terms of driving forces, methods, influencing factors and advantages. The recent research progress of silicon‐based assembled anodes and the mechanism of the functional advantages for assembled structures are reviewed from the aspects of spatial confinement, layered construction, fasciculate structure assembly, superparticles, and interconnected assembly strategies. Various feasible strategies for structural assembly and performance improvement are pointed out. Finally, the challenges and integrated improvement strategies for assembled silicon‐based anodes are summarized. Abstract : This review outlines the latest progress of silicon‐based assembled anodes from the aspects of assembly strategies, emphasizing the mechanism of the functional advantages for assembled structures. These summaries further deepen the understanding of the assembly mechanism and provide the systematic theoretical basis for the construction of superior silicon‐based anodes.