Details
| Original language | English |
|---|---|
| Article number | 2302543 |
| Journal | Advanced energy materials |
| Volume | 13 |
| Issue number | 40 |
| Publication status | Published - 27 Oct 2023 |
Abstract
The reversibility and long-term cycling stability of aqueous zinc-ion batteries (AZIBs) in a wide temperature range have rarely been explored. Herein, diethylene glycol monoethyl ether (DG) is introduced as an electrolyte additive to enhance Zn performance within a wide temperature range of −35 to 65 °C. Operando synchrotron Fourier transform infrared spectroscopy analysis combined with molecular dynamics simulations reveal that the introduction of DG disrupts the initial hydrogen bonding network of the aqueous electrolyte, restructuring the solvation structure surrounding Zn2+ ions and mitigating water-induced parasitic reactions. Adding DG reduces the freezing point of the aqueous electrolyte without compromising its incombustibility. Moreover, operando electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D) and X-ray photoelectron spectroscopy demonstrated that the coordinated DG and OTF− undergo reductive decomposition, forming a self-healing solid electrolyte interphase comprising an inorganic/organic ZnF2-ZnS, which can effectively suppress the notorious side reactions and guide the uniform Zn deposition. Consequently, the symmetric Zn/Zn cells demonstrate excellent cycling stability for 3500 h under 1 mA cm−2 at 25 °C, and for 1000 h under 1 mA cm−2 at both −35 and 65 °C. Full batteries with a DG-containing electrolyte exhibit a long lifespan of 5000 cycles at 2 A g−1.
Keywords
- electrolyte additives, electrolyte engineering, electrolyte modification, Zn ion batteries
ASJC Scopus subject areas
Sustainable Development Goals
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In: Advanced energy materials, Vol. 13, No. 40, 2302543, 27.10.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An Aqueous Electrolyte Regulator for Highly Stable Zinc Anode Under −35 to 65 °C
AU - Wang, Rui
AU - Ma, Quanwei
AU - Zhang, Longhai
AU - Liu, Zixiang
AU - Wan, Jiandong
AU - Mao, Jianfeng
AU - Li, Hongbao
AU - Zhang, Shilin
AU - Hao, Junnan
AU - Zhang, Lin
AU - Zhang, Chaofeng
N1 - Funding Information: R.W. and Q.M. contributed equally to this work. The authors thank the financial support from the National Natural Science Foundation of China (52172173), Natural Science Foundation of Anhui Province for Distinguished Young Scholars (2108085J25), Excellent Research and Innovation Team Project of Anhui Province (2022AH010001), Natural Science Foundation of Anhui Province (2208085QE130). The authors acknowledge the High‐performance Computing Platform of Anhui University for providing computing resources. The authors thank infrared spectroscopy and microspectroscopy beamline (BL01B) of National Synchrotron Radiation Laboratory (NSRL) for the help in characterizations. The authors also thank Biolin Scientific AB for offering the experiment help and data analysis for EQCM‐D.
PY - 2023/10/27
Y1 - 2023/10/27
N2 - The reversibility and long-term cycling stability of aqueous zinc-ion batteries (AZIBs) in a wide temperature range have rarely been explored. Herein, diethylene glycol monoethyl ether (DG) is introduced as an electrolyte additive to enhance Zn performance within a wide temperature range of −35 to 65 °C. Operando synchrotron Fourier transform infrared spectroscopy analysis combined with molecular dynamics simulations reveal that the introduction of DG disrupts the initial hydrogen bonding network of the aqueous electrolyte, restructuring the solvation structure surrounding Zn2+ ions and mitigating water-induced parasitic reactions. Adding DG reduces the freezing point of the aqueous electrolyte without compromising its incombustibility. Moreover, operando electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D) and X-ray photoelectron spectroscopy demonstrated that the coordinated DG and OTF− undergo reductive decomposition, forming a self-healing solid electrolyte interphase comprising an inorganic/organic ZnF2-ZnS, which can effectively suppress the notorious side reactions and guide the uniform Zn deposition. Consequently, the symmetric Zn/Zn cells demonstrate excellent cycling stability for 3500 h under 1 mA cm−2 at 25 °C, and for 1000 h under 1 mA cm−2 at both −35 and 65 °C. Full batteries with a DG-containing electrolyte exhibit a long lifespan of 5000 cycles at 2 A g−1.
AB - The reversibility and long-term cycling stability of aqueous zinc-ion batteries (AZIBs) in a wide temperature range have rarely been explored. Herein, diethylene glycol monoethyl ether (DG) is introduced as an electrolyte additive to enhance Zn performance within a wide temperature range of −35 to 65 °C. Operando synchrotron Fourier transform infrared spectroscopy analysis combined with molecular dynamics simulations reveal that the introduction of DG disrupts the initial hydrogen bonding network of the aqueous electrolyte, restructuring the solvation structure surrounding Zn2+ ions and mitigating water-induced parasitic reactions. Adding DG reduces the freezing point of the aqueous electrolyte without compromising its incombustibility. Moreover, operando electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D) and X-ray photoelectron spectroscopy demonstrated that the coordinated DG and OTF− undergo reductive decomposition, forming a self-healing solid electrolyte interphase comprising an inorganic/organic ZnF2-ZnS, which can effectively suppress the notorious side reactions and guide the uniform Zn deposition. Consequently, the symmetric Zn/Zn cells demonstrate excellent cycling stability for 3500 h under 1 mA cm−2 at 25 °C, and for 1000 h under 1 mA cm−2 at both −35 and 65 °C. Full batteries with a DG-containing electrolyte exhibit a long lifespan of 5000 cycles at 2 A g−1.
KW - electrolyte additives
KW - electrolyte engineering
KW - electrolyte modification
KW - Zn ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85170659674&partnerID=8YFLogxK
U2 - 10.1002/aenm.202302543
DO - 10.1002/aenm.202302543
M3 - Article
AN - SCOPUS:85170659674
VL - 13
JO - Advanced energy materials
JF - Advanced energy materials
SN - 1614-6832
IS - 40
M1 - 2302543
ER -