Tuning lithium-peroxide formation and decomposition routes with single-atom catalysts for lithium–oxygen batteries

Abstract Recently, single-atom catalysts (SACs) have been found to be one of the promising candidates for oxygen electrocatalysis in rechargeable lithium-oxygen batteries (LOBs), owing to their high oxygen electrocatalytic activity and high stability originated from their unique coordination environments and electronic properties. As a new type of catalysts for LOBs, the advancements have never been reviewed and discussed comprehensively. Herein, the breakthroughs in the design of various types of SACs as the cathode catalysts for LOBs are summarized, including Co-based, Ru-based, and other types of SACs. Moreover, considerable emphasis is placed on the correlations between the structural feature of the SAC active sites and the electrocatalytic performance of LOBs. Finally, perspective and challenges of SACs for practical LOBs are also provided. This review could provide an intensive understanding of SACs for designing efficient oxygen electrocatalysis and offers a useful guideline for the development of SACs in the field of LOBs.

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Multistaged discharge constructing heterostructure with enhanced solid-solution behavior for long-life lithium-oxygen batteries

Nature Communications ◽

10.1038/s41467-019-13712-2 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 31

Author(s):

Shu-Mao Xu ◽

Xiao Liang ◽

Xue-Yan Wu ◽

Shen-Long Zhao ◽

Jun Chen ◽

...

Keyword(s):

Charge Transport ◽

Cathode Surface ◽

Critical Role ◽

Cathode Catalysts ◽

Lithium Peroxide ◽

Lithium Diffusion ◽

Large Contact Area ◽

Main Factors ◽

Lithium Oxygen Batteries ◽

Cycling Life

AbstractInferior charge transport in insulating and bulk discharge products is one of the main factors resulting in poor cycling stability of lithium–oxygen batteries with high overpotential and large capacity decay. Here we report a two-step oxygen reduction approach by pre-depositing a potassium carbonate layer on the cathode surface in a potassium–oxygen battery to direct the growth of defective film-like discharge products in the successive cycling of lithium–oxygen batteries. The formation of defective film with improved charge transport and large contact area with a catalyst plays a critical role in the facile decomposition of discharge products and the sustained stability of the battery. Multistaged discharge constructing lithium peroxide-based heterostructure with band discontinuities and a relatively low lithium diffusion barrier may be responsible for the growth of defective film-like discharge products. This strategy offers a promising route for future development of cathode catalysts that can be used to extend the cycling life of lithium–oxygen batteries.

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Effect of the size-selective silver clusters on lithium peroxide morphology in lithium–oxygen batteries

Nature Communications ◽

10.1038/ncomms5895 ◽

2014 ◽

Vol 5 (1) ◽

Cited By ~ 136

Author(s):

Jun Lu ◽

Lei Cheng ◽

Kah Chun Lau ◽

Eric Tyo ◽

Xiangyi Luo ◽

...

Keyword(s):

Silver Clusters ◽

Lithium Peroxide ◽

Lithium Oxygen Batteries

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Lattice Boltzmann Simulation of Lithium Peroxide Formation in Lithium–Oxygen Battery

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4034697 ◽

2016 ◽

Vol 13 (3) ◽

Cited By ~ 8

Author(s):

M. Jithin ◽

Malay K. Das ◽

Ashoke De

Keyword(s):

Porous Media ◽

Lattice Boltzmann ◽

Pore Scale ◽

Peroxide Formation ◽

Initial Current ◽

Lattice Boltzmann Simulation ◽

Lithium Peroxide ◽

Lower Porosity ◽

Lithium Oxygen Battery ◽

Boltzmann Method

Present research deals with multiphysics, pore-scale simulation of Li–O2 battery using multirelaxation time lattice Boltzmann method. A novel technique is utilized to generate an idealized electrode–electrolyte porous media from the known macroscopic variables. Present investigation focuses on the performance degradation of Li–O2 cell due to the blockage of the reaction sites via Li2O2 formation. Present simulations indicate that Li–air and Li–O2 batteries primarily suffer from mass transfer limitations. The study also emphasizes the importance of pore-scale simulations and shows that the morphology of the porous media has a significant impact on the cell performance. While lower porosity provides higher initial current, higher porosity maintains sustainable output.

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Nanostructuring one-dimensional and amorphous lithium peroxide for high round-trip efficiency in lithium-oxygen batteries

Nature Communications ◽

10.1038/s41467-017-02727-2 ◽

2018 ◽

Vol 9 (1) ◽

Cited By ~ 24

Author(s):

Arghya Dutta ◽

Raymond A. Wong ◽

Woonghyeon Park ◽

Keisuke Yamanaka ◽

Toshiaki Ohta ◽

...

Keyword(s):

Round Trip ◽

One Dimensional ◽

Lithium Peroxide ◽

Lithium Oxygen Batteries

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Synergistic Catalysis by Single‐Atom Catalysts and Redox Mediator to Improve Lithium–Oxygen Batteries Performance

Small ◽

10.1002/smll.202101620 ◽

2021 ◽

pp. 2101620

Author(s):

Danying Li ◽

Kangli Xu ◽

Maogen Zhu ◽

Tao Xu ◽

Zhechen Fan ◽

...

Keyword(s):

Redox Mediator ◽

Single Atom ◽

Synergistic Catalysis ◽

Lithium Oxygen Batteries

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Characterization of Li-air batteries: Lithium Peroxide Formation in Li-air Electrodes

10.15760/trec.78 ◽

2014 ◽

Author(s):

Claudia Garibay

Keyword(s):

Peroxide Formation ◽

Lithium Peroxide

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Tris(pentafluorophenyl) borane-containing electrolytes for electrochemical reversibility of lithium peroxide-based electrodes in lithium–oxygen batteries

Journal of Power Sources ◽

10.1016/j.jpowsour.2012.10.029 ◽

2013 ◽

Vol 225 ◽

pp. 95-100 ◽

Cited By ~ 20

Author(s):

Nam-Soon Choi ◽

Goojin Jeong ◽

Bonjae Koo ◽

Yong-Won Lee ◽

Kyu Tae Lee

Keyword(s):

Electrochemical Reversibility ◽

Lithium Peroxide ◽

Lithium Oxygen Batteries

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Single Atom Image Contrast in Fixed Beam Dark Field Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100051840 ◽

1974 ◽

Vol 32 ◽

pp. 366-367

Author(s):

Wah Chi

Keyword(s):

Scattering Amplitude ◽

Present Report ◽

Dark Field ◽

Image Contrast ◽

Single Atom ◽

Optical Theorem ◽

Hartree Fock ◽

Heavy Atoms ◽

Beam Stop ◽

Fixed Beam

Resolution and contrast are the important factors to determine the feasibility of imaging single heavy atoms on a thin substrate in an electron microscope. The present report compares the atom image characteristics in different modes of fixed beam dark field microscopy including the ideal beam stop (IBS), a wire beam stop (WBS), tilted illumination (Tl) and a displaced aperture (DA). Image contrast between one Hg and a column of linearly aligned carbon atoms (representing the substrate), are also discussed. The assumptions in the present calculations are perfectly coherent illumination, atom object is represented by spherically symmetric potential derived from Relativistic Hartree Fock Slater wave functions, phase grating approximation is used to evaluate the complex scattering amplitude, inelastic scattering is ignored, phase distortion is solely due to defocus and spherical abberation, and total elastic scattering cross section is evaluated by the Optical Theorem. The atom image intensities are presented in a Z-modulation display, and the details of calculation are described elsewhere.

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