Artificial Solid Electrolyte Interphase for Suppressing Surface Reactions and Cathode Dissolution in Aqueous Zinc Ion Batteries
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KAUST DepartmentMaterials Science and Engineering, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
Physical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
Embargo End Date2020-10-23
Permanent link to this recordhttp://hdl.handle.net/10754/659948
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AbstractVanadium-based compounds have been widely used as electrode materials in aqueous zinc ion batteries (ZIBs) due to the multiple oxidation states of vanadium and their open framework structure. However, the solubility of vanadium in aqueous electrolytes and the formation of byproducts during the charge/discharge process cause severe capacity fading and limit cycle life. Here, we report an ultrathin HfO2 film as an artificial solid electrolyte interphase (SEI) that is uniformly and conformally deposited by atomic layer deposition (ALD). The inactive hafnium(IV) oxide (HfO2) film not only decreases byproduct (Zn4SO4(OH)6·xH2O) formation on the surface of Zn3V2O7(OH)2·2H2O (ZVO) but also suppresses the ZVO cathode dissolution in the electrolyte. As a result, the obtained HfO2-coated ZVO cathodes deliver higher capacity and better cycle life (227 mAh g–1@100 mA g–1, 90% retention over 100 cycles) compared with pristine ZVO (170 mAh g–1@100 mA g–1, 45% retention over 100 cycles). A mechanistic investigation of the role of HfO2 is presented, along with data showing that our method constitutes a general strategy for other cathodes to enhance their performance in aqueous ZIBs.
CitationGuo, J., Ming, J., Lei, Y., Zhang, W., Xia, C., Cui, Y., & Alshareef, H. N. (2019). Artificial Solid Electrolyte Interphase for Suppressing Surface Reactions and Cathode Dissolution in Aqueous Zinc Ion Batteries. ACS Energy Letters, 2776–2781. doi:10.1021/acsenergylett.9b02029
SponsorsThe research reported in this publication is supported by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters