Kim, Jinuk published the artcileDesigning fluorine-free electrolytes for stable sodium metal anodes and high-power seawater batteries via SEI reconstruction, Application In Synthesis of 143-24-8, the main research area is fluorine electrolyte sodium metal anode SEI power seawater battery.
Fluorine (F) is regarded as a key element in electrolytes for sodium metal anodes (SMAs) because of the formation of NaF containing solid-electrolyte interphase (SEI) layers; however, the high-cost and HF formation issues experienced by F-based electrolytes should be addressed. Herein, F-free, cost-effective 1 M NaBH4/ether-based electrolytes are proposed, motivated by the recent speculation that NaH is a “”good SEI layer””. The time-of-flight secondary ion mass spectrometry (TOF-SIMS) results of sodium metal electrodes after galvanostatic cycling demonstrated that NaH is a major component of the SEI layer. In addition, the native oxide surface of sodium was converted into NaH and NaBO2 after soaking in the electrolytes, implying that “”SEI reconstruction”” occurred by chem. reduction Accordingly, significantly longer cyclability was obtained in the NaNa sym. cell (1200 h, 1 mA cm-2, 1 mA h cm-2) than in F-based electrolytes. In seawater batteries (SWBs), 1 M NaBH4/DEGDME (diethylene glycol di-Me ether) delivers higher power d. (2.82 mW cm-2vs. 2.27 mW cm-2) and cyclability (300 h vs. 50 h) under 1 mA cm-2 than 1 M NaOTf/TEGDME (tetraethylene glycol di-Me ether), which is commonly used in SWBs. In conclusion, two novel contributions of this study include the demonstration that NaH can work as a “”good SEI layer”” apart from NaF and the proposal of a cost-effective, F-free electrolyte for practical and large-scale SWBs.
Energy & Environmental Science published new progress about Batteries (seawater). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application In Synthesis of 143-24-8.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem