Covalent-organic-framework (COF) materials with a designable periodic framework have been expected as a kind of promising anode material for potassium ion batteries (PIBs). However, these materials suffer seriously from low capacity, poor rate performance, and slow reaction kinetics during the K-storage process, significantly limiting their widespread applications. Herein, a three-dimensional (3D) COF material denoted as CN-COF with a high N content and defined configuration as well as a graphite-like layer stacking structure was developed as a promising anode to realize efficient 3D K-storage performance with enhanced interfacial stability and reaction kinetics via an electrolyte chemistry compatibility strategy. Particularly, a uniform and stable solid-electrolyte interphase (SEI) with rich inorganic components was controllably formed in the optimized high-concentration THF-based electrolyte (HTE), ensuring satisfactory cycling stability as well as rapid diffusion kinetics. As a result, the synthesized CN-COF material in this optimized electrolyte delivered a high reversible capacity of 385.8 mAh/g at 50 mA/g, and a well-maintained 95.3 mAh/g after 1500 cycles at 500 mA/g. This work provides innovative design and manipulation of the K-storage mechanism via the synergistic effect between nanostructure design and electrolyte chemistry for advanced K-storage materials.

Yinshuang Pang

Qingxue Lai

Haobo Xia

Wanying Zhang

Hong Chen

Ran Chen

Zixia Lin

Jing Zheng

ACS Applied Materials & Interfaces

ACS APPLIED MATERIALS & INTERFACES 是一本面向化学家、工程师、物理学家和生物学家的跨学科社区的新出版物，重点关注如何开发新发现的材料和界面过程并将其用于特定应用。该杂志除了发表致力于推进应用材料研究的评论和论坛外，还发表来自学术界和工业界研究人员的完整文章和信件。

ACS Applied Materials and Interfaces is an interdisciplinary journal aimed at chemists, engineers, physicists, and biologists, focusing on the development of newly discovered materials and interface processes for specific applications. The journal publishes not only reviews and forums that advance applied materials research but also full articles and letters from researchers in academia and industry.

《ACS Applied Materials and Interfaces》是一本面向化学家、工程师、物理学家和生物学家的跨学科期刊，专注于新材料和界面过程的开发及其特定应用。该杂志不仅发表推动应用材料研究的评论和论坛，还刊登来自学术界和工业界研究人员的完整文章和信件。

Category	Quartile
材料科学	2
材料科学, 材料科学综合	2
材料科学, 纳米科技	2

Covalent-Organic-Framework Enabled Efficient Three-dimensional K-storage via Electrolyte Solvation Manipulation

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	1