Trimming the Degrees of Freedom via a K+ Flux Rectifier for Safe and Long-Life Potassium-Ion Batteries

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nano-Micro Letters Pub Date : 2023-08-18 DOI:10.1007/s40820-023-01178-3

Xianhui Yi, Apparao M. Rao, Jiang Zhou, Bingan Lu

引用次数: 0

Abstract

Highlights

High Coulombic efficiency of over 99% for dendrite-free K||Cu cell after 820 cycles.
Year-scale-cycling performance of organic PTCDI cathode over 2,100 cycles.
Flexible device demonstration such as fibre cell still could operate when cut into three fibre cells.

Abstract Image

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通过K+通量整流器对安全和长寿命钾离子电池的自由度进行修剪。

电解质中K+运动的高自由度(DOF)是理想的，因为由此产生的高离子电导率有助于改善钾离子电池，但需要高度自由和易燃的有机溶剂分子的支持，严重影响电池的安全性。在此，我们开发了一种K+通量整流器，将K离子的DOF调整到1，并改善了电化学性能。虽然离子电导率在K+通量整流器中受到损害，但PIBs的整体电化学性能得到了改善。氧化稳定性从4.0 V提高到5.9 V，枝晶的形成和有机阴极的溶解受到抑制。因此，K||K细胞连续循环超过3,700 h;K||Cu电池可稳定运行800次以上，库仑效率超过99%;K - | - |石墨电池在1500次循环后的容量保留率高达74.7%。此外，3,4,9,10-苝四羧基二亚胺有机阴极的循环次数超过2,100次，达到了年尺度的循环时间。我们制作了一个2.18 Ah的袋状电池，经过100次循环后容量没有明显的衰减。

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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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.