<i>In operando</i> quantitation of Li concentration for a commercial Li-ion rechargeable battery using high-energy X-ray Compton scattering

Suzuki, Kosuke; Suzuki, Ayahito; Ishikawa, Taiki; Itou, M.; Yamashige, Hisao; Orikasa, Yuki; Uchimoto, Yoshiharu; Sakurai, Y.; Sakurai, Hiroshi

doi:10.1107/s1600577517010098

Cited by 22 publications

(26 citation statements)

References 21 publications

(21 reference statements)

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“…Here, the separator position in the lithium reaction distribution obtained at the 0.2C rate was corrected to agree with the separator position obtained at the 1C rate following the same procedure as previously reported [4]. Figure 3a,b correspond to the change of the distributions in the SOC100 Figure 2b,c correspond to SOC0 and SOC100 of lithium reaction distributions at the 0.2C rate, and Figure 2d,e correspond to SOC0 and SOC100 of lithium reaction distributions at the 1C rate.…”

Section: Resultsmentioning

confidence: 99%

“…Here, the lithium momentum density is distributed at low-momentum regions; thus, the high S-parameter value corresponds to a high lithium concentration [12]. The S-parameter is defined through the following equations [3,4],…”

Section: Resultsmentioning

confidence: 99%

“…The experimental configuration was the same as our previous in operando measurement of the lithium concentration [4]. The incident X-ray energy was 115.56 keV, and the scattering angle was fixed at 90 • .…”

Section: Experimental Studymentioning

confidence: 99%

“…Since the Compton profile is directly linked to the wavefunction of the electrons, its line-shape varies depending on each element. So far, we have demonstrated a method to quantify the lithium concentration from the change of the line-shape of the Compton profile (shape parameter analysis; S-parameter analysis) [3] and have successfully determined simultaneously lithium compositions at the positive and negative electrodes during a charge-discharge cycle [4]. A distinctive feature of our technique is that we can quantify the lithium in a working commercial lithium-ion battery using X-rays, although in many X-ray techniques this is difficult to quantify.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we have been developing a method for directly monitoring lithium ions using a high-energy X-ray Compton scattering technique, called Compton scattering imaging [2][3][4]. This technique enables us to measure the reactions in the batteries under in situ and in operando conditions because it uses high-energy X-rays as an incident beam, which has high penetration power in the materials [5].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dependency of the Charge–Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

et al. 2018

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Abstract:In this study, lithium reaction distributions, dependent on the charge-discharge rate, were non-destructively visualized for a commercial lithium-ion battery, using the Compton scattering imaging technique. By comparing lithium reaction distributions obtained at two different charge-discharge speeds, residual lithium ions were detected at the center of the negative electrode in a fully discharged state, at a relatively high-speed discharge rate. Moreover, we confirmed that inhomogeneous reactions were facilitated at a relatively high-speed charge-discharge rate, in both the negative and positive electrodes. A feature of our technique is that it can be applied to commercially used lithium-ion batteries, because it uses high-energy X-rays with high penetration power. Our technique thus opens a novel analyzing pathway for developing advanced batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dependency of the Charge–Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

et al. 2018

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Exploring the Properties of Disordered Rocksalt Battery Cathode Materials by Advanced Characterization

Chen,

Leung,

Huang

2024

Adv Funct Materials

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Cation‐disordered metal oxides as cathode materials for Li ion batteries have been overlooked from early studies due to to the restriction of Li ion diffusion, leading to poor electrochemical performance. However, the discovery of a new disordered rocksalt (DRX) structured material Li1.211Mo0.467Cr0.3O2 with a high capacity of >260 mAh g−1 at 0.05 C opened new research prospects in this emerging field and established DRX materials as a promising alternative with wider choices of transition metal elements compared with currently widely used layered cathode materials. Some of the major obstacles of the DRX materials include γ‐LiFeO2 type cation short‐range‐order that impedes Li ion diffusion, irreversible oxygen loss, and transition metal dissolution, which also present challenges for appropriate characterization techniques. Several performance optimization strategies have been employed, including fluorine incorporation, high entropy modification, and surface coating. This review article focuses on advancements in characterization techniques to uncover underlying mechanisms of Li ion diffusion and degradation of the DRX cathode materials to address the abovementioned challenges and provide inspiration for future studies of this class of materials.

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Cycling Rate‐Induced Spatially‐Resolved Heterogeneities in Commercial Cylindrical Li‐Ion Batteries

et al. 2021

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Synchrotron high‐energy X‐ray diffraction computed tomography has been employed to investigate, for the first time, commercial cylindrical Li‐ion batteries electrochemically cycled over the two cycling rates of C/2 and C/20. This technique yields maps of the crystalline components and chemical species as a cross‐section of the cell with high spatiotemporal resolution (550 × 550 images with 20 × 20 × 3 µm3 voxel size in ca. 1 h). The recently developed Direct Least‐Squares Reconstruction algorithm is used to overcome the well‐known parallax problem and led to accurate lattice parameter maps for the device cathode. Chemical heterogeneities are revealed at both electrodes and are attributed to uneven Li and current distributions in the cells. It is shown that this technique has the potential to become an invaluable diagnostic tool for real‐world commercial batteries and for their characterization under operating conditions, leading to unique insights into “real” battery degradation mechanisms as they occur.

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In operando quantitation of Li concentration for a commercial Li-ion rechargeable battery using high-energy X-ray Compton scattering

Cited by 22 publications

References 21 publications

Dependency of the Charge–Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

Dependency of the Charge–Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

Exploring the Properties of Disordered Rocksalt Battery Cathode Materials by Advanced Characterization

Cycling Rate‐Induced Spatially‐Resolved Heterogeneities in Commercial Cylindrical Li‐Ion Batteries

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