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Dynamic Reversible Evolution of Solid Electrolyte Interface in Nonflammable Triethyl Phosphate Electrolyte Enabling Safe and Stable Potassium‐Ion Batteries
Ji, S.P.1; Li, J.1; Li, J.F.1; Song, C.2; Wang, S.1; Wang, K.1; Hui, K.S.3; Zha, C.1; Zheng, Y.1; Dinh, D.A.4; Chen, S.1; Zhang, J.5; Mai, W.6; Tang, Z.K.1; Shao, Z.7; Hui, K.N.1
2022-04
Source PublicationAdvanced Functional Materials
Volume32Pages:2200771
Abstract

Potassium-ion batteries (PIBs) are a favorable alternative to lithium-ion batteries (LIBs) for the large-scale electrochemical storage devices because of the high natural abundance of potassium resources. However, conventional PIB electrodes usually exhibit low actual capacities and poor cyclic stability due to the large radius of potassium ions (1.39 Å). In addition, the high reactivity of potassium metal raises serious safety concerns. These characteristics seriously inhibit the practical use of PIB electrodes. Here, zinc phosphide composites are rationally designed as PIB anodes for operation in a nonflammable triethyl phosphate (TEP) electrolyte to solve the above-mentioned issues. The optimized zinc phosphide composite with 20 wt% zinc phosphate presents a high specific capacity (571.1 mA h g−1 at 0.1 A g−1) and excellent cycling performance (484.9 mA h g−1 with the capacity retention of 94.5% after 1000 cycles at 0.5 A g−1) in the KFSI-TEP electrolyte. XPS depth profile analysis shows that the improved cycling stability of the composite is closely related to the reversible dynamic evolutions and conversions of the sulfur-containing species in the solid electrolyte interphase (SEI) during the charge/discharge process. This dynamic reversible SEI concept may provide a new strategy for the design of superior electrodes for PIBs.

KeywordNon-flammable Electrolytes, Potassium-ion Batteries, Solid Electrolyte Interfaces, Triethyl Phosphate, Zinc Phosphide
DOI10.1002/adfm.202200771
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Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorHui, K.S.; Shao, Z.; Hui, K.N.
Affiliation1.Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa, Macau SAR 999078, P. R. China
2.Analysis and Testing Center Shenzhen Technology University Shenzhen 518118, China
3.Faculty of Science University of East Anglia Norwich NR4 7TJ, United Kingdom
4.NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City 700000, Vietnam
5.Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan 250100, China
6.Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan University Guangzhou, Guangdong 510632, China
7.State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 211816, China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Ji, S.P.,Li, J.,Li, J.F.,et al. Dynamic Reversible Evolution of Solid Electrolyte Interface in Nonflammable Triethyl Phosphate Electrolyte Enabling Safe and Stable Potassium‐Ion Batteries[J]. Advanced Functional Materials,2022,32:2200771.
APA Ji, S.P.,Li, J.,Li, J.F.,Song, C.,Wang, S.,Wang, K.,Hui, K.S.,Zha, C.,Zheng, Y.,Dinh, D.A.,Chen, S.,Zhang, J.,Mai, W.,Tang, Z.K.,Shao, Z.,&Hui, K.N..(2022).Dynamic Reversible Evolution of Solid Electrolyte Interface in Nonflammable Triethyl Phosphate Electrolyte Enabling Safe and Stable Potassium‐Ion Batteries.Advanced Functional Materials,32,2200771.
MLA Ji, S.P.,et al."Dynamic Reversible Evolution of Solid Electrolyte Interface in Nonflammable Triethyl Phosphate Electrolyte Enabling Safe and Stable Potassium‐Ion Batteries".Advanced Functional Materials 32(2022):2200771.
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