Surface coating with Li-Ti-O to improve the electrochemical performance of Ni-rich cathode material

Huang, Yuheng; Yao, Xiang; Hu, Xinchao; Han, Qingyue; Wang, Haihui; Ding, Liang‐Xin

doi:10.1016/j.apsusc.2019.06.012

Cited by 41 publications

(12 citation statements)

References 37 publications

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“…Clearly, NCM811@LNO (0.0068 V) and NCM811@3LNO (0.0032 V) electrodes demonstrate the lower potential difference of anodic-cathodic peaks compared to that of the pristine NCM811 (0.0096 V). The decreased potential difference of NCM811@3LNO electrode implies improved electrode reversibility and reduced electrochemical polarization according to the literature [ 40 , 41 ]. The above results indicate that surface modification with electronic conductor LaNiO 3 crystallites is beneficial to improve the electrode kinetics, leading to increasing the first coulombic efficiency and charge/discharge capacity and decreasing the electrochemical polarization degree of NCM811 cathodes.…”

Section: Resultssupporting

confidence: 60%

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Zhang

et al. 2022

Materials

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Fast charging-discharging is one of the important requirements for next-generation high-energy Li-ion batteries, nevertheless, electrons transport in the active oxide materials is limited. Thus, carbon coating of active materials is a common method to supply the routes for electron transport, but it is difficult to synthesize the oxide-carbon composite for LiNiO2-based materials which need to be calcined in an oxygen-rich atmosphere. In this work, LiNi0.8Co0.1Mn0.1O2 (NCM811) coated with electronic conductor LaNiO3 (LNO) crystallites is demonstrated for the first time as fast charging-discharging and high energy cathodes for Li-ion batteries. The LaNiO3 succeeds in providing an exceptional fast charging-discharging behavior and initial coulombic efficiency in comparison with pristine NCM811. Consequently, the NCM811@3LNO electrode presents a higher capacity at 0.1 C (approximately 246 mAh g−1) and a significantly improved high rate performance (a discharge specific capacity of 130.62 mAh g−1 at 10 C), twice that of pristine NCM811. Additionally, cycling stability is also improved for the composite material. This work provides a new possibility of active oxide cathodes for high energy/power Li-ion batteries by electronic conductor LaNiO3 coating.

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Section: Resultssupporting

confidence: 60%

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Zhang

et al. 2022

Materials

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“…107 Peng et al 84 synthesized NCM@MTP with reduced lattice oxygen evolution by Mg, Ti codoping, and observed NCM811 and NCM@ MTP particles after 200 cycles through HR-TEM. Rock salt phase impurities were observed in the interior of NCM811 after 200 cycles (Figure 9a), whereas the R3m layer was well maintained in NCM@ MTP with the ( 101) and (006) planes of H_NCM (Figure 9b), 108,109 implying suppressed phase transformations and, thus structural integrity. TEM also allows direct measurement of the lattice parameters.…”

Section: Characterization Methods For the Strain Of Camsmentioning

confidence: 99%

Zero-Strain Cathodes for Lithium-Based Rechargeable Batteries: A Comprehensive Review

Park

Lee

et al. 2022

ACS Appl. Energy Mater.

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Cathode materials commonly experience volumetric changes that can reduce the cycle life of lithium-based rechargeable batteries. To improve stability in performance, materials must be designed to be structurally invariant throughout electrochemical cycling. Zero-strain cathode materials refer to those cathode materials that undergo negligible or zero volumetric changes during cell cycling. These can provide various benefits, including a high battery operating voltage, high capacity, and long-term stability. In this review, we summarize the problems of conventional cathode active materials originating from volumetric changes with the origin of strains and discuss the zero-strain behavior of the cathode. Recent advancements in the validation of engineering strategies to enhance cathode performance based on zero-strain behavior and identification of reaction mechanisms in zero-strain cathodes are highlighted. Further, analytical methods are introduced that can be used to demonstrate the strain behavior of cathodes with suppressed volumetric changes. Finally, a comprehensive outlook on the future direction of research on materials with zero-strain behavior is provided.

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“…However, because of the poor stability against oxidation of conventional carbonate-based electrolytes above 4.3 V vs. Li + /Li, it is now well recognized that the high reactivity of the NCM811 usually results in parasitic electrolyte degradation, which is accelerated with the increase of the Ni content in the NCM positive electrodes, leading to the thickening of the positive electrode-electrolyte interphase upon cycling (Li et al, 2015;Ryu et al, 2018). Some strategies, including surface coating with the oxide layer (Schipper et al, 2017;Huang et al, 2019), designing concentration-gradient structures (Park et al, 2015;Lim et al, 2016), utilizing functional electrolyte additives (Li et al, 2017;Lan et al, 2019;Liu et al, 2019;Lim et al, 2020;Gu et al, 2022), and employing anti-oxidative electrolytes (Cao et al, 2019a;Heist et al, 2019;Liu et al, 2022), have been proposed to enhance the interfacial stability of the NCM electrodes. Among these strategies, electrolyte engineering is thought to be one of the most effective and feasible approaches to stabilize the interface between the electrode and the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Fluorinated co-solvent electrolytes for high-voltage Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) positive electrodes

et al. 2022

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Nickel-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) is one of the most promising positive electrodes for utilization in the next-generation of lithium-ion batteries. Charging the NCM cells above 4.3 V is proposed to be beneficial for its reversible capacity. However, the high reactivity of the NCM811 usually results in parasitic electrolyte degradation, which is accelerated with the increase of the Ni content in the NCM positive electrodes, leading to the thickening of the positive electrode-electrolyte interphase during cycling. Herein, to counter this issue, we select partially fluorinated solvents, such as methyl 3,3,3-trifluoropropanoate (MTFP) and 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane (NFMB), as a co-solvent for fluoroethylene carbonate (FEC)-based electrolytes, and detailed investigate theirs physical, chemical, and electrochemical properties for applications in NCM811 materials. Compared to the carbonate-based electrolyte without a fluorinated solvent, the electrolytes with a fluorinated co-solvent display an obviously enhanced cycling performance of the Li/NCM811 cells charged to above 4.5 V. This work suggests that fluorinated co-solvent electrolytes provide an alternative way to the high-concentration electrolyte for the design of new electrolyte systems for high energy density lithium-ion batteries.

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Surface coating with Li-Ti-O to improve the electrochemical performance of Ni-rich cathode material

Cited by 41 publications

References 37 publications

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Zero-Strain Cathodes for Lithium-Based Rechargeable Batteries: A Comprehensive Review

Fluorinated co-solvent electrolytes for high-voltage Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) positive electrodes

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