Investigation of first-cycle voltage hysteresis in Li-rich cathode materials by magnetic Compton scattering experiments.

IF 2.3 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER
Aierxiding Abulikemu, Tomoya Ando, Naruki Tsuji, Kosuke Suzuki, Manabu Takahashi, Tsuyoshi Takami, Hiroshi Sakurai
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引用次数: 0

Abstract

Lithium-rich layered oxides (LLOs) are among the most promising cathode materials for next-generation lithium-ion batteries featuring reversible capacities of 250 mAh g-1or higher. However, LLOs suffer from severe voltage hysteresis during the charge/discharge process. In this work, we utilized magnetic Compton scattering spectroscopy to characterize the electronic states of the typical LLO Li1.2-xNi0.2Mn0.6O2and extract the redox orbitals. By comparing the experimental data with the results of density functional theory calculations, we successfully achieved the first direct observation of spin-polarized oxygen 2p state modifications due to superstructural changes, which were found to be responsible for the voltage hysteresis during the charge/discharge process.

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来源期刊
Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter 物理-物理:凝聚态物理
CiteScore
5.30
自引率
7.40%
发文量
1288
审稿时长
2.1 months
期刊介绍: Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
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