Countering Voltage Decay, Redox Sluggishness, and Calendering Incompatibility by Near‐Zero‐Strain Interphase in Lithium‐Rich, Manganese‐Based Layered Oxide Electrodes

He, Weitao; Zhang, Chunxiao; Wei, Bo; Zhu, Yuelei; Wu, Jianghua; Liang, Chaoping; Chen, Libao; Wang, Peng; Wei, Weifeng

doi:10.1002/adfm.202200322

Cited by 32 publications

(19 citation statements)

References 50 publications

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“…This study demonstrated that adding a protective layer can significantly hinder volume expansion. Similarly, He et al 76 used the reactive infiltration method (RIM) to inject Li-ion conductive near-zero-strain LiAlO 2 (LAO) into the grain boundary of Li 1.2 [Mn 0.54 Ni 0.26 ]O 2 (LRMN) to coat the primary particles (Figure 3). The LAO coating layer can provide mechanical stability to the LRMN owing to its near-zero-strain behavior.…”

Section: Strategies For Achieving Zero-strain Cathodesmentioning

confidence: 99%

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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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Section: Strategies For Achieving Zero-strain Cathodesmentioning

confidence: 99%

“…(b) HAADF-STEM, (c, d) equivalent FFT patterns, and (e–h) energy-dispersive spectroscopy (EDS) mapping of the cross-sectional LAO-LRMN cathode at the grain boundary. Reproduced with permission from ref . Copyright 2022, Wiley-VCH GmbH.…”

Section: Strategies For Achieving Zero-strain Cathodesmentioning

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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“…So far, numerous measures have been taken for modifying the bulk and surface structures and properties of LLOs, such as surface coatings , and elemental doping . Zhao et al obtained a uniform Al 2 O 3 coating on the surface of layered cathode materials using an atomic layer deposition technique and thus achieved the outstanding cycle performance.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Roles of Trace Fe and F Co-doped into High-Ni Li-Rich Layered Oxides in Performance Improvement

Mao

Tan

Fan

et al. 2023

ACS Appl. Mater. Interfaces

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High-Ni Li-rich layered oxides (HNLOs) derived from Li-rich Mn-based layered oxides (LRMLOs) can effectively mitigate the voltage decay of LRMLOs but normally suffered from decreased capacity and cycling stability. Herein, an effective, simple, and up-scalable co-doping strategy of trace Fe and F ions via a facile expanded graphite template-sacrificed approach was proposed for improving the performance of HNLOs. The trace Fe and F codoping can far more effectively improve both its rate capability and cycling stability in a synergistic manner compared to the introduction of individual Fe cations and F anions. The co-doping of Fe and F increased the Li−O bonds by a magnitude far larger than the summation of the increments by their individual doping, quite favorable for the performance. The trace Fe doping can escalate the capacity and enhance the rate capability significantly by increasing the components of lower valence transition metals to activate their redox reactions more effectively and improving both the electronic and ionic conduction. In contrast, trace F can improve the cycling stability remarkably by lowering the O 2p band top to suppress the lattice oxygen escape effectively which were revealed by density functional theory calculations. The co-doped cathode exhibited excellent cycling stability with a superior capacity retention of 90% after 200 cycles at 1 C, much higher than 64% for the pristine sample. This study offers an idea for synergistically improving the performance of Li-rich layered oxides by co-doping trace Fe cations and F anions simultaneously, which play a complementary role in performance improvement.

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“…Cathode materials are the main bottleneck limiting the energy density of lithium-ion batteries (LIBs), because their specific capacity is usually lower than that of the current anode materials. − Therefore, there is an urgent need to explore cathode materials with high voltage and high specific capacity to meet the growing demands for high-energy-density LIBs. , …”

Section: Introductionmentioning

confidence: 99%

In Situ Formed Heterostructure Interface and Well-Tuned Electronic Structure Ensuring Long Cycle Stability for 4.9 V High-Voltage Li-Rich Layered Oxide Cathodes

Zhou

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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High-voltage lithium-rich manganese-based layered oxides (LMLOs) are considered as the most competitive cathode materials for next-generation high-energy-density lithium-ion batteries (LIBs). However, LMLOs still suffer from irreversible lattice oxygen release, uncontrollable interface side reactions, and surface structural degradation. Herein, we propose an integration strategy combining La/Al codoping and Li x CoPO4 nanocoating to improve the electrochemical performance of LMLOs comprehensively. La/Al codoping regulates the electronic structure to enhance the redox activity of anions and cations and inhibit structural degradation. The Li x CoPO4 nanocoating formed by in situ reaction with the surface residual lithium can not only promote Li-ion migration but also reduce interfacial side reactions. The induced Layered@Rocksalt@Li x CoPO4 heterostructure suppresses lattice volume variation and structural degradation during cycling. Under the synergistic effect of the heterostructure interface and well-tuned electronic structure, the capacity retention rate of comodified LMLO materials reaches 80.06% after 500 cycles (2.0–4.65 V) and 75.1% after 340 cycles at 1C under a high cut-off voltage of 4.9 V.

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Countering Voltage Decay, Redox Sluggishness, and Calendering Incompatibility by Near‐Zero‐Strain Interphase in Lithium‐Rich, Manganese‐Based Layered Oxide Electrodes

Cited by 32 publications

References 50 publications

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

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

Unveiling the Roles of Trace Fe and F Co-doped into High-Ni Li-Rich Layered Oxides in Performance Improvement

In Situ Formed Heterostructure Interface and Well-Tuned Electronic Structure Ensuring Long Cycle Stability for 4.9 V High-Voltage Li-Rich Layered Oxide Cathodes

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