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논문 해외 국제전문학술지(SCI급) Synergistic effects between dual salts and Li nitrate additive in ether electrolytes for Li-metal anode protection in Li secondary batteries
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2022-11
- 저자명 Vera Afumaa Afrifah, Jung Min Kim, Yong Min Lee, Isheunesu Phiri, Young-Gi Lee, Sun-Yul Ryou
- 학술지명 Journal of Power Sources
- 발행처명 ScienceDirect
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
- 논문 다운로드 링크(외부) https://www.sciencedirect.com/science/article/pii/S0378775322009946
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
The practical applications of Li-metal batteries (LMBs) are limited by dendrite formation. Thus, a synergistic approach for enhancing the cycling performance of LMBs by combining dual salts with lithium nitrate as an additive in an ether-based electrolyte system is presented. The dual salts, lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) and lithium bis(oxalate)borate (LiBOB), and lithium nitrate (LiNO3), are dissolved in a dual etherbased solvent composed of 1,2-dimethoxyethane and 1,3-dioxane. The electrolyte shows high electrochemical stability of up to ∼ 4.6V, circumventing the drawback of ether-based solvents, which are known to exhibit an oxidation potential of <4V. Moreover, dendrite inhibition is enhanced by the formation of a robust and passivating solid-electrolyte interface (SEI). Additionally, the rate capability and cycling performance are enhanced up to 1000 cycles, with a 90.0% discharge capacity retention at 1C for the lithium iron phosphate (LFP)/Li battery. Furthermore, Li/Li symmetric cells exhibit a high stability with >2300 h of repeated stripping and plating at 0.5 mA cm− 2, which is an enhancement of approximately 300% compared with the reference
