PMID- 31858056
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201001
IS  - 2470-1343 (Electronic)
IS  - 2470-1343 (Linking)
VI  - 4
IP  - 24
DP  - 2019 Dec 10
TI  - LiTFSI Concentration Optimization in TEGDME Solvent for Lithium-Oxygen Batteries.
PG  - 20708-20714
LID - 10.1021/acsomega.9b02941 [doi]
AB  - Focus on lithium-oxygen batteries is growing due to their various advantages, 
      such as their high theoretical energy densities and renewable and environmentally 
      friendly characteristics. Nonaqueous organic electrolytes play a key role in 
      lithium-oxygen batteries, allowing the conduction of lithium ions and oxygen 
      transfer in the three phase boundaries (cathode-gas-electrolyte). Herein, we 
      report the effect of lithium salt concentrations in single-solvent lithium-oxygen 
      battery systems systematically (using bis(trifluoromethanesulfonyl)imide (LiTFSI) 
      in tetraethylene glycol dimethyl ether (TEGDME)) on their electrochemical 
      performances. The first discharge capacities and cyclabilities exhibit favorable 
      correlations with the lithium salt concentration, of which using 0.4 and 1.5 M 
      LiTFSI show the best discharge capacities and cyclabilities. The specific 
      capacity of the 0.4 M LiTFSI system reaches 7000 mAh g(-1), about 1.3 times that 
      of the commonly used 1 M LiTFSI in TEGDME. Cyclic voltammetry with slow scan 
      speeds further investigates the system stability and reaction mechanism. The 
      surface morphology after the discharge and interface impedance after charging, 
      which are examined using scanning electron microscopy (SEM) and electrochemical 
      impedance spectroscopy (EIS), have significant effects on the comprehensive 
      performances. Conductivity and viscosity play mutual roles in the lithium-oxygen 
      battery performance, while the oxygen solvation has little effect.
CI  - Copyright (c) 2019 American Chemical Society.
FAU - Chen, Jingwen
AU  - Chen J
AD  - Laboratory of Advanced Materials and Department of Chemistry, Shanghai Key 
      Laboratory of Molecular Catalysis and Innovative Materials, Collaborative 
      Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 
      200438, China.
FAU - Chen, Chunguang
AU  - Chen C
AD  - Laboratory of Advanced Materials and Department of Chemistry, Shanghai Key 
      Laboratory of Molecular Catalysis and Innovative Materials, Collaborative 
      Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 
      200438, China.
FAU - Huang, Tao
AU  - Huang T
AD  - Laboratory of Advanced Materials and Department of Chemistry, Shanghai Key 
      Laboratory of Molecular Catalysis and Innovative Materials, Collaborative 
      Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 
      200438, China.
FAU - Yu, Aishui
AU  - Yu A
AD  - Laboratory of Advanced Materials and Department of Chemistry, Shanghai Key 
      Laboratory of Molecular Catalysis and Innovative Materials, Collaborative 
      Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 
      200438, China.
LA  - eng
PT  - Journal Article
DEP - 20191126
PL  - United States
TA  - ACS Omega
JT  - ACS omega
JID - 101691658
PMC - PMC6906938
COIS- The authors declare no competing financial interest.
EDAT- 2019/12/21 06:00
MHDA- 2019/12/21 06:01
PMCR- 2019/11/26
CRDT- 2019/12/21 06:00
PHST- 2019/09/10 00:00 [received]
PHST- 2019/11/13 00:00 [accepted]
PHST- 2019/12/21 06:00 [entrez]
PHST- 2019/12/21 06:00 [pubmed]
PHST- 2019/12/21 06:01 [medline]
PHST- 2019/11/26 00:00 [pmc-release]
AID - 10.1021/acsomega.9b02941 [doi]
PST - epublish
SO  - ACS Omega. 2019 Nov 26;4(24):20708-20714. doi: 10.1021/acsomega.9b02941. 
      eCollection 2019 Dec 10.