In:
Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 16, No. 9 ( 2023), p. 3837-3846
Abstract:
An efficient solid electrolyte interphase (SEI) on the lithium (Li) metal anode is crucial for suppressing Li dendrites. Herein, a methoxide electrolyte additive, i.e. , potassium methoxide, is revealed to induce preferential adsorption of anions on the Li metal surface by a combination of theoretical and experimental studies. Cryogenic transmission electron microscopy measurements and X-ray photoelectron spectroscopy depth profiles reveal that the as-formed inorganic-rich SEI possesses an amorphous and monolithic feature, which not only enables uniform diffusion of Li + through the SEI but also reduces the diffusion barrier of Li + along the Li/SEI interface. Consequently, Li dendrites can be efficiently suppressed and the cycling lifetime of Li|Li symmetric cells can be prolonged to 3500 h at 1 mA cm −2 /1 mA h cm −2 . Besides, the LiFePO 4 |Li full-cell batteries can be cycled stably over 400 cycles with an N/P ratio ( i.e. , the areal capacity ratio of the negative to positive electrodes) of ∼3 and a high LiFePO 4 mass loading of ∼20 mg cm −2 .
Type of Medium:
Online Resource
ISSN:
1754-5692
,
1754-5706
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2439879-2
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