Stabilizing A Si Anode Via An Inorganic Oligomer Binder Enabled By Robust Polar Interfacial Interactions
ACS APPLIED MATERIALS & INTERFACES(2021)
摘要
Exploiting macromolecule binders has been demonstrated as an effective approach to stabilize a Si anode with a huge volume change. The macromolecule polymer binders with vast intra/intermolecular interactions lead to an inferior dispersion of binders on a Si active material. Herein, a potassium triphosphate (PTP) inorganic oligomer was exploited as a robust binder to alleviate the problem of capacity fading in Si-based electrodes. PTP has abundant P-O- bonds and P.O bonds, which can form strong ion-dipolar and dipolar-dipolar forces with a hydroxylated Si surface (Si-OH). Particularly, the PTP inorganic oligomer has a short-chain structure and high water solubility, resulting in a superior dispersion of the PTP binder on Si nanoparticles (nanoSi) to effectively enhance the mechanical stability of Si-based electrodes. Hence, the asprepared Si-based anode exhibits obviously improved electrochemical performance, delivering a charge capacity of 1279.7 mAh g(-1) after 300 cycles at 800 mA g(-1) with a high capacity retention of 72.7%. Moreover, using the PTP binder, a dense Si anode can be achieved for high volumetric energy density. The success of this study shows that the PTP inorganic oligomer as a binder has great significance for future advanced binder research.
更多查看译文
关键词
Si anode, inorganic oligomer binder, robust interfacial interactions, superior binder dispersion, high electrode density
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要