Artificial Solid Electrolyte Interface with Superhalogen-Based Double Antiperovskite Li6OS(BH4)2 Materials For Dentrite-Free and Stable Lithium Metal Batteries

Author

Gazi Mahfujul Alam, South Dakota State UniversityFollow

Document Type

Thesis - Open Access

Award Date

2022

Degree Name

Master of Science (MS)

Department / School

Electrical Engineering and Computer Science

First Advisor

Xiaojun Xian

Keywords

artificial solid electrolyte interface, dendrite formation, double antiperovskite materials, huper halogen, Li anode, lithium metal battery

Abstract

Lithium (Li) metal is regarded as the most propitious anode material for next-generation battery technologies owing to its incredibly high theoritical capacity (3860 mAh g-1) and the most negative electrochemical equilibrium potential (-3.04 V vs standard hydrogen electrode). However, the practical implementation of Li anode in commercial lithium batteries is severely inhibited by the unstable solid liquid interfaces resulting from the ultrahigh reactivity, which leads to dendrite growth, low coulombic efficiency, extreme volume fluctuation, and even safety concerns. For a stable and efficient lithium anode to build next generation Li metal battery, in this thesis, we have tried to solve these problems by incorporating an artificial solid electrolyte interface (SEI) consist of a novel super halogen based double antiperovskite Li₆OS(BH₄)₂ and nafion. The growth of artificial SEI layer consist of the novel double antiperovskite materiasl on top of the liithium metal results in a uniform dendrite free Li deposition and accomplish a steady voltage profile and longer hours of plating/stripping cycles as well as high coulombic efficiency in comparison to the bare Li. The antiperovskite treated Li anode aslo showed lower charge transfer resistance compared to bare Li anode. The double antiperovskite treated Li/LFP full cells showed a higher capacity retention rate at longer cycles. It also demonstrated better performance at higher current density up to 5C.

Keywords: lithium metal battery, double antiperovskite materials, Li anode, dendrite formation, stable solid electrolyte interface, voltage profile, higher current densities, symmetrical cell, full cell, transference number.

Number of Pages

66

Publisher

South Dakota State University

Recommended Citation

Alam, Gazi Mahfujul, "Artificial Solid Electrolyte Interface with Superhalogen-Based Double Antiperovskite Li6OS(BH4)2 Materials For Dentrite-Free and Stable Lithium Metal Batteries" (2022). Electronic Theses and Dissertations. 472.
https://openprairie.sdstate.edu/etd2/472