Cosolvent electrolyte chemistries for high-voltage potassium-ion battery

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外文摘要：The poor oxidation resistance of traditional electrolytes has hampered the development of high-voltage potassium-ion battery technology.Here,we present a cosolvent electrolyte design strategy to overcome the high-voltage limitations of potassium-ion electrolyte chemistries.The cosolvent electrolyte breaks the dissolution limitation of the salt through ion-dipole interactions,significantly enlarging the anion-rich solvation clusters,as verified by the in situ synchrotron-based wide-angle X-ray scattering experiments.Furthermore,the large anion-rich solvation clusters also facilitate the formation of an effective electrode-electrolyte interphase,thereby enhancing compatibility with high-voltage electrodes.The cosolvent electrolyte enables K‖ Prussian blue cells(2-4.5 V)to operate for＞700 cycles with a capacity retention of 91.9％.Our cosolvent electrolyte design strategy paves new avenues for the development of high-voltage potassium-ion batteries and beyond.

外文关键词：

potassium-ion batterycosolvent electrolytehigh-voltageanion-rich solvationlarge solvation clusters

作者：

Mengkang Shen、Zhongqin Dai、Ling Fan、Hongwei Fu、Yuanhui Geng、Jie Guan、Fanfei Sun、Apparao M.Rao、Jiang Zhou、Bingan Lu

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作者单位：

School of Physics and Electronics,Hunan University,Changsha 410082,China

School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China

Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China

Department of Physics and Astronomy,Clemson Nanomaterials Institute,Clemson University,Clemson SC 29634,USA

School of Materials Science and Engineering,Central South University,Changsha 410083,China

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China

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出版年：

2024

DOI：

10.1093/nsr/nwae359

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ISSN：

年,卷(期)：2024.11(11)