Hydrogen-bond regulation in organic/aqueous hybrid electrolyte for safe and high-voltage K-ion batteries

Maoting Xia; Hongwei Fu; Kairui Lin; Apparao M. Rao; Limei Cha; Huan Liu; Jiang Zhou; Chengxin Wang; Bingan Lu

doi:10.1039/d3ee03729k

Hydrogen-bond regulation in organic/aqueous hybrid electrolyte for safe and high-voltage K-ion batteries

Maoting Xia, Hongwei Fu^*, Kairui Lin, Apparao M. Rao, Limei Cha, Huan Liu, Jiang Zhou, Chengxin Wang^*, Bingan Lu^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

High reliability and proven ultra-long life make aqueous batteries ideal for grid energy storage. However, the narrow electrochemical stability window (ESW) caused by the high activity of H₂O severely hampers their practical applications. Here, hydrogen-bond (H-bond) regulation is applied using succinonitrile (SCN) to reconstruct the binding state of H₂O molecules, in which the “free H₂O” with strong H-bond network is converted to the “immobilized H₂O” restricted by SCN molecules, thus inhibiting the activity of H₂O. The designed 5.6 m KFSI-SCN-H₂O hybrid electrolyte exhibits an expanded ESW over 4.0 V, particularly with a high anodic limit above 5.1 V, which is the highest among the reported aqueous K-ion electrolytes. Moreover, the electrolyte possesses non-flammability, improved conductivity, and a wider applicable temperature range. As a result, the assembled KVPO₄F||PTCDI full cell exhibits excellent cycling stability over 10 000 cycles with a low capacity decay of 0.0025% per cycle and provides a competitive energy density of about 100 W h kg⁻¹. This work provides insights into how the H-bond regulation strategy inhibits the activity of H₂O in organic/aqueous hybrid electrolytes, offering a promising pathway to achieve higher-energy-density aqueous batteries without compromising safety.

Original language	English
Pages (from-to)	1255-1265
Number of pages	11
Journal	Energy and Environmental Science
Volume	17
Issue number	3
DOIs	https://doi.org/10.1039/d3ee03729k
State	Published - 12 Jan 2024

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/d3ee03729k

Cite this

@article{759116a566ff4459b7cba2ddd8ee212f,

title = "Hydrogen-bond regulation in organic/aqueous hybrid electrolyte for safe and high-voltage K-ion batteries",

abstract = "High reliability and proven ultra-long life make aqueous batteries ideal for grid energy storage. However, the narrow electrochemical stability window (ESW) caused by the high activity of H2O severely hampers their practical applications. Here, hydrogen-bond (H-bond) regulation is applied using succinonitrile (SCN) to reconstruct the binding state of H2O molecules, in which the “free H2O” with strong H-bond network is converted to the “immobilized H2O” restricted by SCN molecules, thus inhibiting the activity of H2O. The designed 5.6 m KFSI-SCN-H2O hybrid electrolyte exhibits an expanded ESW over 4.0 V, particularly with a high anodic limit above 5.1 V, which is the highest among the reported aqueous K-ion electrolytes. Moreover, the electrolyte possesses non-flammability, improved conductivity, and a wider applicable temperature range. As a result, the assembled KVPO4F||PTCDI full cell exhibits excellent cycling stability over 10 000 cycles with a low capacity decay of 0.0025% per cycle and provides a competitive energy density of about 100 W h kg−1. This work provides insights into how the H-bond regulation strategy inhibits the activity of H2O in organic/aqueous hybrid electrolytes, offering a promising pathway to achieve higher-energy-density aqueous batteries without compromising safety.",

author = "Maoting Xia and Hongwei Fu and Kairui Lin and Rao, {Apparao M.} and Limei Cha and Huan Liu and Jiang Zhou and Chengxin Wang and Bingan Lu",

note = "Publisher Copyright: {\textcopyright} 2024 The Royal Society of Chemistry.",

year = "2024",

month = jan,

day = "12",

doi = "10.1039/d3ee03729k",

language = "英语",

volume = "17",

pages = "1255--1265",

journal = "Energy and Environmental Science",

issn = "1754-5692",

publisher = "Royal Society of Chemistry",

number = "3",

}

TY - JOUR

T1 - Hydrogen-bond regulation in organic/aqueous hybrid electrolyte for safe and high-voltage K-ion batteries

AU - Xia, Maoting

AU - Fu, Hongwei

AU - Lin, Kairui

AU - Rao, Apparao M.

AU - Cha, Limei

AU - Liu, Huan

AU - Zhou, Jiang

AU - Wang, Chengxin

AU - Lu, Bingan

PY - 2024/1/12

Y1 - 2024/1/12

N2 - High reliability and proven ultra-long life make aqueous batteries ideal for grid energy storage. However, the narrow electrochemical stability window (ESW) caused by the high activity of H2O severely hampers their practical applications. Here, hydrogen-bond (H-bond) regulation is applied using succinonitrile (SCN) to reconstruct the binding state of H2O molecules, in which the “free H2O” with strong H-bond network is converted to the “immobilized H2O” restricted by SCN molecules, thus inhibiting the activity of H2O. The designed 5.6 m KFSI-SCN-H2O hybrid electrolyte exhibits an expanded ESW over 4.0 V, particularly with a high anodic limit above 5.1 V, which is the highest among the reported aqueous K-ion electrolytes. Moreover, the electrolyte possesses non-flammability, improved conductivity, and a wider applicable temperature range. As a result, the assembled KVPO4F||PTCDI full cell exhibits excellent cycling stability over 10 000 cycles with a low capacity decay of 0.0025% per cycle and provides a competitive energy density of about 100 W h kg−1. This work provides insights into how the H-bond regulation strategy inhibits the activity of H2O in organic/aqueous hybrid electrolytes, offering a promising pathway to achieve higher-energy-density aqueous batteries without compromising safety.

AB - High reliability and proven ultra-long life make aqueous batteries ideal for grid energy storage. However, the narrow electrochemical stability window (ESW) caused by the high activity of H2O severely hampers their practical applications. Here, hydrogen-bond (H-bond) regulation is applied using succinonitrile (SCN) to reconstruct the binding state of H2O molecules, in which the “free H2O” with strong H-bond network is converted to the “immobilized H2O” restricted by SCN molecules, thus inhibiting the activity of H2O. The designed 5.6 m KFSI-SCN-H2O hybrid electrolyte exhibits an expanded ESW over 4.0 V, particularly with a high anodic limit above 5.1 V, which is the highest among the reported aqueous K-ion electrolytes. Moreover, the electrolyte possesses non-flammability, improved conductivity, and a wider applicable temperature range. As a result, the assembled KVPO4F||PTCDI full cell exhibits excellent cycling stability over 10 000 cycles with a low capacity decay of 0.0025% per cycle and provides a competitive energy density of about 100 W h kg−1. This work provides insights into how the H-bond regulation strategy inhibits the activity of H2O in organic/aqueous hybrid electrolytes, offering a promising pathway to achieve higher-energy-density aqueous batteries without compromising safety.

UR - http://www.scopus.com/inward/record.url?scp=85182905001&partnerID=8YFLogxK

U2 - 10.1039/d3ee03729k

DO - 10.1039/d3ee03729k

M3 - 文章

AN - SCOPUS:85182905001

SN - 1754-5692

VL - 17

SP - 1255

EP - 1265

JO - Energy and Environmental Science

JF - Energy and Environmental Science

IS - 3

ER -

Hydrogen-bond regulation in organic/aqueous hybrid electrolyte for safe and high-voltage K-ion batteries

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this