논문 해외 국제전문학술지(SCI급) A Carboranyl Electrolyte Enabling Highly Reversible Sodium Metal Anodes via a “Fluorine‐Free” SEI
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2022-12
- 저자명 Anton W Tomich, Jehee Park, Seoung‐Bum Son, Ethan P Kamphaus, Xingyi Lyu, Fulya Dogan, Veronica Carta, Jihyeon Gim, Tao Li, Lei Cheng, Eungje Lee, Vincent Lavallo, Christopher S Johnson
- 학술지명 Angewandte Chemie International Edition
- 발행처명 Wiley
- 발행국가 해외
- 논문언어 외국어
- 원문 링크 https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202208158
홈페이지논문 초록 (Abstract)
Realization of practical sodium metal batteries (SMBs) is hindered due to lack of compatible electrolyte components, dendrite propagation, and poor understanding of anodic interphasial chemistries. Chemically robust liquid electrolytes that facilitate both favorable sodium metal deposition and a stable solid-electrolyte interphase (SEI) are ideal to enable sodium metal and anode-free cells. Herein we present advanced characterization of a novel fluorine-free electrolyte utilizing the [HCB11H11]1− anion. Symmetrical Na cells operated with this electrolyte exhibit a remarkably low overpotential of 0.032 V at a current density of 2.0 mA cm−2 and a high coulombic efficiency of 99.5 % in half-cell configurations. Surface characterization of electrodes post-operation reveals the absence of dendritic sodium nucleation and a surprisingly stable fluorine-free SEI. Furthermore, weak ion-pairing is identified as key towards the successful development of fluorine-free sodium electrolytes.