稳健钾离子电池中稳定锑原子簇阳极的选择性催化介面。

IF 16.9
Song Chen, Fangrui Yu, Hongli Deng, Wei Chen, Hongtao Sun, Jian Zhu, Bingan Lu
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引用次数: 0

摘要

控制电极-电解质界面行为是实现高质量固体电解质界面相(SEI)和确保可持续电池性能的关键。在这里,我们提出了一种选择性催化策略来稳定稳健钾离子电池(PIBs)的锑原子簇(SbSA-AC)阳极/电解质界面。具体而言,以多孔碳中SbSA-AC为“电催化剂”的电极(SbSA-AC/PC)过度催化了二甲醚基电解质的还原,导致SEI层松散,容量衰减迅速。而在磷酸三乙酯基电解质中,SbSA-AC/PC选择性催化阴离子的优先分解和溶剂分子的聚合,形成内层富含无机组分的双层SEI和外层弹性聚磷酸盐层,提高了界面稳定性和电化学性能。因此,SbSA-AC/PC保持了超过12个月的长期稳定性,并展示了超过4000个周期的长周期稳定性,容量保持率为96%。本研究建立了电极/电解质相互作用与SEI特性之间的相关性,为高性能pib及其他领域的高级界面工程提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Selective Catalysis-Mediated Interface to Stabilize Antimony Atom-Cluster Anode for Robust Potassium-Ion Batteries.

Controlling the electrode-electrolyte interfacial behavior is crucial for achieving a high-quality solid electrolyte interphase (SEI) and ensuring sustainable battery performance. Here, we propose a selective catalysis strategy to stabilize antimony atom-cluster (SbSA-AC) anode/electrolyte interface for robust potassium-ion batteries (PIBs). Specifically, the electrode featuring SbSA-AC in porous carbon (SbSA-AC/PC) as "electrocatalyst" unduly catalyzes the reduction of the dimethyl ether-based electrolyte, resulting in loose SEI layer and rapid capacity decay. While in triethyl phosphate-based electrolyte, the SbSA-AC/PC selectively catalyzes the preferential decomposition of anions and the polymerization of solvent molecules, leading to a bilayer SEI with inner inorganic-rich components and an outer elastic polyphosphate layer, which improve the interface stability and electrochemical performance. Thus, the SbSA-AC/PC maintains a long-term stability over 12 months and demonstrates long-cycling stability over 4000 cycles with a capacity retention of 96%. This research establishes a correlation between electrode/electrolyte interactions and SEI characteristics, providing a new insight for advanced interface engineering in high-performance PIBs and beyond.

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