Strategies to enable microsized alloy anodes for high-energy and long-life alkali-ion batteries†

Industrial Chemistry & Materials Pub Date : 2024-02-16 DOI:10.1039/D3IM00126A

Amine Daali, Rachid Amine, Wilkistar Otieno, Gui-Liang Xu and Khalil Amine

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Abstract

Micro-sized anode materials demonstrate greater potential for practical applications than nanomaterials in the aspects of volumetric energy density, coulombic efficiency, fabrication process, and cost. However, the huge volume changes of alloy anodes (up to ∼500%) during repeated charge/discharge has led to a series of challenging issues including pulverization of active material particles and delamination from current collectors, formation of thick and fragile solid-electrolyte interphase (SEI) and depletion of electrolytes, eventually leading to rapid cell degradation. Herein, we review recent progress of rational strategies to enable the use of microsized alloy anodes (Si, P, Sb, Sn, etc.) including electrolyte modulation, binder design and architecture engineering. We also provide perspectives on future directions and remaining challenges of microsized anodes towards practical applications.

Keywords: Volume change; Alloy; Anodes; Microsized; Alkali-ion; Batteries.

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为高能量、长寿命碱性离子电池实现微尺寸合金阳极的策略

与纳米材料相比，微尺寸阳极材料在体积能量密度、库仑效率、制造工艺和成本等方面具有更大的实际应用潜力。然而，合金阳极在反复充放电过程中的巨大体积变化（高达约 500%）导致了一系列具有挑战性的问题，包括活性材料颗粒的粉碎和与集流器的分层、厚而脆弱的固电解质相（SEI）的形成以及电解质的耗竭，最终导致电池的快速降解。在此，我们回顾了使用微尺寸合金阳极（Si、P、Sb、Sn 等）的合理策略的最新进展，包括电解质调节、粘合剂设计和结构工程。我们还展望了微尺寸阳极走向实际应用的未来方向和仍然面临的挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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