Extremely conductive RuO2-coated LiNi0.5Mn1.5O4 for lithium-ion batteries

Jung, Seunho; Kim, Dong Hyeon; Brüner, Philipp; Lee, Hyeyoun; Hah, Hoe Jin; Kim, Seok Koo; Jung, Yoon Seok

doi:10.1016/j.electacta.2017.02.109

Cited by 37 publications

(19 citation statements)

References 44 publications

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Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

“…They confirmed the electrochemical/chemical stability of the RuO 2 coated LNMO. [ 128 ] In addition, the RuO 2 coating could improve the conductivity of LNMO and significantly enhanced the rate capability (Figure 11i). [ 128 ] Yi et al.…”

Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

“…[ 128 ] In addition, the RuO 2 coating could improve the conductivity of LNMO and significantly enhanced the rate capability (Figure 11i). [ 128 ] Yi et al. reported that a nanometer thick CeO 2 layer could effectively suppress the interfacial side reactions between LNMO and electrolyte.…”

Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

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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: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

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

Manthiram

2021

Small Methods

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“…Figure b depicts the electrochemical impedance spectroscopy (EIS) plots of the three samples after activating at 0.1 C and then charged to 4.8 V. EIS is always used to evaluated the interfacial electrochemistry, reaction kinetics and the Li ions transportation in lithium battery ,. The EIS plots contain a intercept in high frequency related to the ohmic resistance ( R s ), a typical semicircle in the high/mid‐low frequency region assigned to the surface interface resistance ( R f ) and charge transfer resistance ( R ct ), respectively and a sloping straight line represented Warburg impedance ( Z w ) due to solid‐state diffusion of Li ions in the bulk of the intercalation compound ,. All the resistances are estimated by fitting of the impedance spectrums using the equivalent circuit (the inset in Figure b ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of LiNi_0.5Mn_1.5O₄ via Ammonia‐free Co‐precipitation Method: Insight in the Effects of the Lithium Additions on the Morphology, Structure and Electrochemical properties

Chen

Tang

et al. 2019

ChemistrySelect

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Stoichiometric sphere-like Ni 0.25 Mn 0.75 CO 3 precursors have been synthesized by the ammonia-free co-precipitation via adjusting the Na 2 CO 3 precipitant feeding. As an important factor in LiNi 0.5 Mn 1.5 O 4 synthesis process, the effects of lithium additions on the physicochemical and electrochemical properties of the LiNi 0.5 Mn 1.5 O 4 were extensively investigated. The lithium additions increase can strengthen the LiNi 0.5 Mn 1.5 O 4 crystal growth and crystallization. Lack of lithium additions causes the formation of the lithium deficient compounds, while the excess of lithium additions induces the phase transformation from Fd-3m to P4 3 32 accompanied by the formation of the rock salt phase. The as-prepared spinel LiNi 0.5 Mn 1.5 O 4 with lithium additions of 0.505 delivers 135.8 mAh * g -1 at 147.0 mA * g -1 with capacity retention of 90.06 % after 300 cycles. Even at 2940 mA * g -1 , the discharge capacity can reach to 96.7 mAh * g -1 .These excellent electrochemical performances are mainly ascribed to the Ni 0.25 Mn 0.75 CO 3 precursors with homogenous elements distributions, the good morphology and crystal structure of LiNi 0.5 Mn 1.5 O 4 at appropriate amounts of lithium additions.[a] Dr.

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“…As a typical coating material, oxides have been widely exploited in the surface modification for cathode materials of LIB. The coating oxides include MgO [95] , Al 2 O 3 [96] , SiO 2 [97] , TiO 2 [98] , ZnO [99] , ZrO 2 [100] , CeO 2 [101] , and RuO 2 [102] with TiO 2 is 74.5 mAh/g at the 15 C. Further outcomes exhibited an excellent rate capability and cycle stability because the capacity retention rate of the coated material is 88.5% after 500 cycles at the 2 C, while uncoated material only reaches 33.0% [98] . For the LiFePO 4 cathode, the performance of samples with and without 2.5% (mass fraction) ZnO coating were compared, which showed the specific capacity (0.1 C) of 150 mAh/g and 85 mAh/g, respectively.…”

Section: Oxidementioning

confidence: 99%

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

Guan

Zhou

et al. 2020

Journal of Energy Chemistry

339

142

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Extremely conductive RuO2-coated LiNi0.5Mn1.5O4 for lithium-ion batteries

Cited by 37 publications

References 44 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

Synthesis of LiNi_0.5Mn_1.5O₄ via Ammonia‐free Co‐precipitation Method: Insight in the Effects of the Lithium Additions on the Morphology, Structure and Electrochemical properties

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

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Extremely conductive RuO2-coated LiNi0.5Mn1.5O4 for lithium-ion batteries

Cited by 37 publications

References 44 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

Synthesis of LiNi0.5Mn1.5O4 via Ammonia‐free Co‐precipitation Method: Insight in the Effects of the Lithium Additions on the Morphology, Structure and Electrochemical properties

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

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Synthesis of LiNi_0.5Mn_1.5O₄ via Ammonia‐free Co‐precipitation Method: Insight in the Effects of the Lithium Additions on the Morphology, Structure and Electrochemical properties