Dynamic Modulation of Li 2 O 2 Growth in Li-O 2 Batteries through Regulating Oxygen Reduction Kinetics with Photo-Assisted Cathodes

Widely acknowledged that the capacity of Li-O batteries (LOBs) should be strongly determined by growth behaviors of the discharge product of lithium peroxide (Li O ) that follows both coexisting surface and solution pathways. However until now, it remains still challenging to achieve dynamic modulat...

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Published inAngewandte Chemie International Edition Vol. 63; no. 16; p. e202401272
Main Authors Yu, Haohan, Liu, Dapeng, Fu, Zerui, Wang, Shu, Zuo, Xintao, Feng, Xilan, Zhang, Yu
Format Journal Article
LanguageEnglish
Published Germany 15.04.2024
Subjects
Li-O2 batteries
oxygen reduction reaction
photo-responsive
surface plasmon resonance
Li2O2 growth
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Summary:Widely acknowledged that the capacity of Li-O batteries (LOBs) should be strongly determined by growth behaviors of the discharge product of lithium peroxide (Li O ) that follows both coexisting surface and solution pathways. However until now, it remains still challenging to achieve dynamic modulation on Li O morphologies. Herein, the photo-responsive Au nanoparticles (NPs) supported on reduced oxide graphene (Au/rGO) have been utilized as cathode to manipulate oxygen reduction reaction (ORR) kinetics by aid of surface plasmon resonance (SPR) effects. Thus, we can experimentally reveal the importance of matching ORR kinetics with Li migration towards battery performance. Moreover, it is found that Li concentration polarization caused "sudden death" of LOBs is supposed to be just a form of suspended animation that could timely recover under irradiation. This work provides us an in-depth explanation on the working mechanism of LOBs from a kinetic perspective, offering valuable insights for the future battery design.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202401272