Hetero-Solvation-Diluted Strongly-Coordinated Zn²⁺-Cosolvent Pairs Downshifting Zn Electrode Potential for High-Voltage Hybrid Batteries

Li, Hongqing1; Tang, Yongchao1,2; Liu, Guigui1; He, Jiangfeng1; Wei, Yue3; Ye, Minghui1; Zhang, Yufei1; Yang, Qi4; Li, Hongfei5; Wen, Zhipeng1; Liu, Xiaoqing1; Li, Cheng Chao1

2023-12-01

10.1002/smtd.202301081

SMALL METHODS   影响因子和分区

2366-9608

Mild aqueous Zn batteries (AZBs) generally suffer a low-voltage/energy dilemma, which compromises their competitiveness for large-scale energy storage. Pushing Zn anode potential downshift is an admissible yet underappreciated approach for high-voltage/energy AZBs. Herein, with a mild hybrid electrolyte containing in situ-derived diluted strongly-coordinated Zn2+-cosolvent pairs, a considerable Zn anode potential downshift is initially achieved for high-voltage Zn-based hybrid batteries. The chosen butylpyridine cosolvent not only strongly coordinates Zn2+ ions but also acts as a hydrogen-bond end-capping agent to inhibit hydrogen evolution reaction (HER). The electrolyte environment with hetero-solvation-diluted strongly-coordinated Zn2+-cosolvent pairs remarkably lowers Zn2+ activity, responsible for the Zn electrode potential downshift (-0.330 V vs Zn), confirming to modified Nernst law (Delta E = RT/nF ln[a(Zn2 + )/a(coordinated solvent)]). With the diluted Zn2+-containing hybrid electrolyte, the Zn//Zn symmetric cell in the hybrid electrolyte shows a long lifespan over 1270 h at a stripping/plating capacity of 0.4 mA h cm(-2). Compared with in common hybrid electrolytes, the as-assembled Zn-MnO2 hybrid battery delivers a ca. 0.278 V enhanced voltage plateau (1.57 V) and a long-term cyclability of over 736 cycles. This work opens a new avenue toward Zn anode potential downshift for high-voltage AZBs, which can extend to other mild metal batteries.

anode potential downshift high voltage plateau hybrid batteries hybrid hybrid electrolyte ion-pair complex interplay

SCI ; EI

英语

其他

Guangdong Basic and Applied Basic Research Foundation["2023A1515030173","2021A1515110952","2021A0505030067"] ; Science and Technology Foundation of Shenzhen[JCYJ20190808153609561] ; Open Research Fund of Songshan Lake Materials Laboratory[2021SLABFN04] ; Research Start-up Fund of GDUT[263113425] ; null[22109109] ; null[52371216] ; null[52271204]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001120657800001

WILEY-V C H VERLAG GMBH

20235015194501

Anodes ; Coordination reactions ; Electrolytes ; Hydrogen bonds ; Manganese oxide ; Secondary batteries ; Zinc ; Zinc compounds

Zinc and Alloys:546.3 ; Electric Batteries and Fuel Cells:702 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

Web of Science

1.Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China
2.Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
3.Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan 523808, Peoples R China
4.Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
5.Southern Univ Sci & Technol, Sch Syst Design & Intelligent Mfg, Shenzhen 518055, Guangdong, Peoples R China

Li, Hongqing,Tang, Yongchao,Liu, Guigui,et al. Hetero-Solvation-Diluted Strongly-Coordinated Zn²⁺-Cosolvent Pairs Downshifting Zn Electrode Potential for High-Voltage Hybrid Batteries[J]. SMALL METHODS,2023.

Li, Hongqing.,Tang, Yongchao.,Liu, Guigui.,He, Jiangfeng.,Wei, Yue.,...&Li, Cheng Chao.(2023).Hetero-Solvation-Diluted Strongly-Coordinated Zn²⁺-Cosolvent Pairs Downshifting Zn Electrode Potential for High-Voltage Hybrid Batteries.SMALL METHODS.

Li, Hongqing,et al."Hetero-Solvation-Diluted Strongly-Coordinated Zn²⁺-Cosolvent Pairs Downshifting Zn Electrode Potential for High-Voltage Hybrid Batteries".SMALL METHODS (2023).