Singlet oxygen and dioxygen bond cleavage in the aprotic lithium-oxygen battery

Overlooked Factors Required for Electrolyte Solvents in Li–O2 Batteries: Capabilities of Quenching 1O2 and Forming Highly‐Decomposable Li2O2

“…Chemie tantly, larger amount of 16 O 2 was generated at a faster rate over 18 O 2 during charging (Figure S12). A small amount of 16 O 18 O was also detected, which can be because of the disproportionation reaction of LiO 2 , [31] as described earlier.…”

Overlooked Factors Required for Electrolyte Solvents in Li–O2 Batteries: Capabilities of Quenching 1O2 and Forming Highly‐Decomposable Li2O2

“…The proposed pathways for the formation of 1 O 2 include 1) disproportionation reaction of LiO 2 , and 2) oxidation reaction of LiO 2 [10, 12, 37–39] . Notably, it was recently reported that more than 40 % of the 1 O 2 is generated via the pathway‐(1) in ether‐based electrolytes [31] . On the other hand, the details of the 1 O 2 generation mechanism in other pathways and the differences depending on the kind of electrolyte have not been clarified at present.…”

“…[10,12,[37][38][39] Notably, it was recently reported that more than 40 % of the 1 O 2 is generated via the pathway-(1) in ether-based electrolytes. [31] On the other hand, the details of the 1 O 2 generation mechanism in other pathways and the differences depending on the kind of electrolyte have not been clarified at present. Thus, we need to be cautious in interpreting the cyclability in the DMA-based electrolyte on the basis of its 1 O 2 quenching capability.…”

“…A recent work has revealed 4.5 % of oxygen undergoes scrambling during disproportionation reaction of LiO 2 in ether-based electrolytes . [31] When the 16 O 18 O thus formed is involved in the decomposition reaction, C 18 O 16 O can also be generated. CO 2 evolution was observed even at potentials less than 4.0 V (Figure S10) even though the three amides were electrochemically stable in the range < 4.0 V (Figures S2 and S3).…”

2D SnSe Cathode Catalyst Featuring an Efficient Facet‐Dependent Selective Li2O2 Growth/Decomposition for Li–Oxygen Batteries

“…[8,12] On the other hand, the reaction kinetics on the cathode catalyst are not only dominated by the Li 2 O 2 formation/decomposition process, but also the adsorption/ desorption of absorbates such as O 2 , Li + , and LiO 2 . [2,[13][14][15][16][17][18] A highly efficient cathode catalyst should possess both high active catalytic capability for the ORR/OER process and appropriate adsorption ability to ensure smooth reaction kinetics. [19,20] Materials with a 2D layered structure have received considerable attention for use in catalytic, electronic and optoelectronic devices [21][22][23][24] due to their unique properties including a large surface area, [25] flexible stack layers, [26] electron confinement effect, [27] high carrier mobility, and thickness-tunable bandgap modulation.…”