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cycling mechanism of li2mno3 lico2 batteries and commonality on oxygen redox in cathode materials

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Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

Here, we clarify both the bulk and surface reaction mechanisms of Li 2 MnO 3 during the initial and later cycles. Our results reveal that the initial charge plateau is from two types of surface activities, followed by predominating Mn redox reactions with no sign of reversible lattice oxygen redox.

Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

The comparison shows that reversible oxygen redox reaction in Li-rich resembles those in conventional materials, implying that oxygen redox is a common property of most TMO cathodes at highly oxidized states, and the Li-rich configuration only “affect” oxygen redox behavior, by either over-promoting irreversible oxygen oxidation in systems ...

Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

The U.S. Department of Energy's Office of Scientific and Technical Information

Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

No lattice oxygen redox is involved at any electrochemical stage. The carbonate formation and decomposition indicate the catalytic property of the Li 2 MnO 3 surface, which inspires Li-CO 2 /air batteries with Li 2 MnO 3 acting as a superior electrocatalyst. The absence of lattice oxygen redox in Li 2 MnO 3 questions the origin of the oxygen redox in Li-rich compounds, which is found to be of the same nature as that in conventional materials based on spectroscopic comparisons.

Cycling mechanism of Li2MnO3: Li-CO2 batteries and ...

Cycling mechanism of Li 2MnO 3: Li– CO 2 batteries and commonality on oxygen redox in cathode materials Li 2MnO 3 isaparentcompoundofLi-richmaterialswhoseelectrochemicalactivities are under debate. Mn and O redox reactions are analyzed both in the bulk and on the surface during the initial and later cycles. Mn(III/IV) redox dominates the bulk

Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

The carbonate formation and decomposition indicate the catalytic property of the Li 2 MnO 3 surface, which inspires Li-CO 2 /air batteries with Li 2 MnO 3 acting as a superior electrocatalyst. The absence of lattice oxygen redox in Li 2 MnO 3 questions the origin of the oxygen redox in Li-rich compounds, which is found to be of the same nature as that in conventional materials based on spectroscopic comparisons.

Cycling mechanism of Li2MnO3: Li–CO2 batteries and ...

Request PDF | Cycling mechanism of Li2MnO3: Li–CO2 batteries and commonality on oxygen redox in cathode materials | Li2MnO3 has been considered to be a representative Li-rich compound with ...

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Cycling mechanism of Li2MnO3 (A) is the cycling profile with electrochemical capacity values of each charge (Ch) and discharge (Dis) step with a unit of mAh g−1. Colors of the profile lines represent roughly the different redox mechanism, blue for reversible Mn3+/4+ and pink for irreversible reactions invoving oxygen release and surface reactions.

Wanli Yang personal research homepage 杨万里

Cycling mechanism of Li2MnO3: Li–CO2 batteries and commonality on oxygen redox in cathode materials Joule 5, 975-997 (2021) (Li Rich: TM effect) Z Zhuo, K Dai, J Wu, L Zhang, N Tamura, Y-d Chuang, J Feng, J Guo, Z-x Shen, G Liu*, F Pan*, WL Yang* Distinct Oxygen Redox Activities in Li2MO3 (M = Mn, Ru, Ir) ACS Energy Letters 6, 3417-3424 (2021)

Excess Lithium in Transition Metal Layers of Epitaxially ...

We have investigated the initial-cycle battery behavior of epitaxial thin films of Li2MnO3 cathodes by employing resonant inelastic X-ray scattering (RIXS) at the O K-edge and Mn L3-edge. Thin films (25 nm thickness) with Li/Mn ratios of 2.06 (stoichiometric) and 2.27 (overstoichiometric) were epitaxially grown by pulsed laser deposition and electrochemically cycled as battery cathodes in a ...