Engineering Sodium-Ion Solvation Structure to Stabilize Sodium Anodes: Universal Strategy for Fast-Charging and Safer Sodium-Ion Batteries
- Authors
- Zhou, Lin; Cao, Zhen; Zhang, Jiao; Sun, Qujiang; Wu, Yingqiang; Wahyudi, Wandi; Hwang, Jang-Yeon; Wang, Limin; Cavallo, Luigi; Sun, Yang-Kook; Alshareef, Husam N.; Ming, Jun
- Issue Date
- May-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- sodium battery; electrolyte; solid electrolyte interphase; anode; fast charging
- Citation
- NANO LETTERS, v.20, no.5, pp.3247 - 3254
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO LETTERS
- Volume
- 20
- Number
- 5
- Start Page
- 3247
- End Page
- 3254
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/9854
- DOI
- 10.1021/acs.nanolett.9b05355
- ISSN
- 1530-6984
- Abstract
- Sodium-ion batteries are promising alternatives for lithium-ion batteries due to their lower cost caused by global sodium availability. However, the low Coulombic efficiency (CE) of the sodium metal plating/stripping process represents a serious issue for the Na anode, which hinders achieving a higher energy density. Herein, we report that the Na+ solvation structure, particularly the type and location of the anions, plays a critical role in determining the Na anode performance. We show that the low CE results from anion-mediated corrosion, which can be tackled readily through tuning the anion interaction at the electrolyte/anode interface. Our strategy thus enables fast-charging Na-ion and Na–S batteries with a remarkable cycle life. The presented insights differ from the prevailing interpretation that the failure mechanism mostly results from sodium dendrite growth and/or solid electrolyte interphase formation. Our anionic model introduces a new guideline for improving the electrolytes for metal-ion batteries with a greater energy density.
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