Stroboscopic neutron diffraction applied to fast time-resolved operando studies on Li-ion batteries (d-LiNi0.5Mn1.5O4vs. graphite)

Sheptyakov, Denis; Boulet-Roblin, Lucien; Pomjakushin, Vladimir; Borel, Philippe; Tessier, Cécile

doi:10.1039/c9ta11826h

Cited by 21 publications

(24 citation statements)

References 31 publications

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“…The independency of neutron scattering lengths from the atomic numbers and the interaction between atomic nuclei and neutrons implies that neutron powder diffraction (NPD) would be a more powerful technique for the analysis of cationic ordering in LNMO. [ 24 ] Figure 1h presents the simulated NPD patterns of disordered and ordered LNMO, in which substantial differences between the two structures can be observed. [ 25 ]…”

Section: Fundamentals Of High‐voltage Spinel Lnmo Cathodes: Crystal Chemistry/structure Characterization and Electrochemical Mechanismmentioning

confidence: 99%

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Manthiram

2021

Small Methods

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Insertion compounds have been dominating the cathodes in commercial lithium‐ion batteries. In contrast to layered oxides and polyanion compounds, the development of spinel‐structured cathodes is a little behind. Owing to a series of advantageous properties, such as high operating voltage (≈4.7 V), high capacity (≈135 mAh g−1), low environmental impact, and low fabrication cost, the high‐voltage spinel LiNi0.5Mn1.5O4 represents a high‐power cathode for advancing high‐energy‐density Li+‐ion batteries. However, the wide application and commercialization of this cathode are hampered by its poor cycling performance. Recent progress in both the fundamental understanding of the degradation mechanism and the exploration of strategies to enhance the cycling stability of high‐voltage spinel cathodes have drawn continuous attention toward this promising insertion cathode. In this review article, the structure–property correlations and the failure mode of high‐voltage spinel cathodes are first discussed. Then, the recent advances in mitigating the cycling stability issue of high‐voltage spinel cathodes are summarized, including the various approaches of structural design, doping, surface coating, and electrolyte modification. Finally, future perspectives and research directions are put forward, aiming at providing insightful information for the development of practical high‐voltage spinel cathodes.

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Section: Fundamentals Of High‐voltage Spinel Lnmo Cathodes: Crystal Chemistry/structure Characterization and Electrochemical Mechanismmentioning

confidence: 99%

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Manthiram

2021

Small Methods

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“…For example, in the study discussed above, the operando NPD dataset was collected over a full electrochemical charge/discharge cycle lasting 60 h (i.e., a C-rate of 0.033 C, where C is the theoretical current required to fully charge/discharge the battery in 1 h), which is a relatively slow rate compared to typical rates used in battery powered devices such as mobile phones or electric vehicles. In a recent study by Sheptyakov et al, [56] the authors used a stroboscopic data collection procedure to conduct operando NPD on a full battery cell (d-LiNi 0.5 Mn 1.5 O 4 vs graphite) at a much faster (>30x) rate (full cycle 110 min, charge rate ≈1.1 C). The obtained data are presented in Figure 7a-c.…”

Section: Structural Evolution During (De)intercalationmentioning

confidence: 99%

Section: Structural Evolution During (De)intercalationmentioning

confidence: 99%

Strategies for the Analysis of Graphite Electrode Function

Andersen

Djuandhi

Mittal

et al. 2021

Advanced Energy Materials

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“…[17] Such kind of in situ neutron diffraction studies are performed on Li-ion cells of different designs, either laboratory [18][19][20][21] or commercial [22][23][24] type. In recent years a number of neutron diffraction studies dedicated to the lithiation of either positive or negative electrode materials, [25][26][27][28][29][30][31] aging behavior [32,33] and effects of temperature. [34,35] The majority of the above-mentioned reports focuses on the structure evolution obtained by integration over a large cell volume, assuming the studied cells to be uniform.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneity of Graphite Lithiation in State‐of‐the‐Art Cylinder‐Type Li‐Ion Cells

Petz

Mühlbauer

Schökel

et al. 2021

Batteries & Supercaps

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The two-dimensional lithium distribution in the graphite anode was non-destructively probed by spatially resolved neutron diffraction for a batch consisting of 34 different cylinder-type (18650) Li-ion batteries in fully charged state. The uniformity of the lithium distribution was quantified and correlated to the cell specifications/electrochemistry and to intrinsic cell parameters like electrode thickness, position of current collectors, etc. which were obtained by X-ray micro-computed tomography. Non-uniformities in the lithiation state of the anode from a constant plateau have been observed for the majority of the studied cells. Their location corresponds to the positions of current tabs connecting the electrode stripes and areas of incomplete electrode coating at the beginning and the end of the electrode stripes. Four commonly used schemes of current lid connection were identified. Each of them displays its own effect on the uniformity of the lithiation at the anode and, therefore, variation of the intrinsic state-of-charge distribution and, most probably, the ageing behavior of the electrodes.

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Stroboscopic neutron diffraction applied to fast time-resolved operando studies on Li-ion batteries (d-LiNi_0.5Mn_1.5O₄vs. graphite)

Abstract: Applying stroboscopic neutron diffraction in studying unprecedentedly fast processes in rechargeable batteries at up to 15C rate.

Cited by 21 publications

References 31 publications

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Strategies for the Analysis of Graphite Electrode Function

Heterogeneity of Graphite Lithiation in State‐of‐the‐Art Cylinder‐Type Li‐Ion Cells

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