Functional Passivation Interface of LiNi0.8Co0.1Mn0.1O2 toward Superior Lithium Storage

Liu, Wen; Li, Xifei; Hao, Youchen; Xiong, Dongbin; Shan, Hui; Wang, Jingjing; Xiao, Wei; Yang, Huijuan; Yang, Hong Bin; Kou, Liang; Tian, Zhanyuan; Shao, Lang; Zhang, Cheng

doi:10.1002/adfm.202008301

Cited by 61 publications

(15 citation statements)

References 43 publications

(56 reference statements)

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“…[33] Ni-rich layered oxides have stimulated widespread interest but tend to suffer from inherent structural degradation problems and safety concerns. [34] The internal structure degradation issues could be reified as Ni/Li mixing, [35] residual lithium compound (RLC) formation, [36] irreversible phase transitions, [37] TM ion dissolution [38] and associated engineering problems. [39] High-voltage LNMO (spinel) has been developed on the basis of spinel lithium manganese, which can reach reversible capacities Li-rich: Li 1.2 Ni 0.2 Mn 0.6 O 2 and LNMO: LiNi 0.5 Mn 1.5 O 4 ).…”

Section: Introductionmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

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With the rapid growth of global electro‐mobility, the demand for cobalt is rapidly increasing because it is currently an indispensable component of the cathode materials in lithium‐ion batteries (LIBs). However, the use of Co raises moral issues caused by its exploitation and the geographic limitations of Co resources may result in risking the supply of LIBs. Thus, the development of cobalt‐free (Co‐free) cathodes has become a focus in the LIBs industry. Currently, Co‐free cathodes of lithium‐rich oxides, nickel‐rich layered oxides and spinel lithium nickel manganese oxide (LNMO) are promising candidates but face severe problems. This review article is the first to synthesize and present the progress of Co‐free cathodes made with Li‐rich oxides, Ni‐rich layered oxides and spinel LNMO, identifying their performance, problems and potential development trends. In particular, the roles of cobalt are further clarified, and the full‐cell performance and related commercialization prospects of the three above‐mentioned Co‐free cathodes are also objectively assessed. The focus of this work is to distill detailed and timely insights from the corresponding research progress on these materials and to demonstrate the associated urgency, challenges and opportunities in this field, thus facilitating a faster industrialization of Co‐free cathodes.

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Section: Introductionmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

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“…[ 4–7 ] Therefore, the NCM are currently considered as the most promising cathode materials for LIBs. [ 8–10 ] However, there are some shortcomings which need to be addressed, such as cation mixing, further phase transformation and surface reconstruction, interfacial side reaction, moisture/air‐reactive lithium residues, etc., which not only contribute to initial capacity decay, but also bring about poor thermal stability and reduced cycle life. [ 4,11,12 ] In summary, most of these problems are mainly initiated at cathode surface, and the stability of this region largely determines the electrochemical performance of the cell.…”

Section: Introductionmentioning

confidence: 99%

Surface Reconstruction of Ni‐Rich Layered Cathodes: In Situ Doping versus Ex Situ Doping

et al. 2022

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The structural instability and sluggish Li+ diffusion kinetic of the nickel‐rich LiNixCoyMn1−x−yO2 (NCM) cathode still hinder its further commercialization for lithium‐ion batteries. Doping heteroatoms are widely studied as an effective strategy to maintain structural and thermal stability for improving the capacity retention of NCM during cycling. Herein this work, in situ Zn2+‐doped NCM (in situ Zn‐NCM) is successfully designed by atomic layer deposition (ALD) combined with annealing. In comparison to ex situ Zn2+‐doped NCM (ex situ Zn‐NCM), in situ Zn‐NCM can better enhance the layered structure stability and reduce the generation of surface defects due to that it has lower migration energy barrier and more uniform distribution of heteroatoms. As a result, at a high cutoff voltage of 4.5 V, in situ Zn‐NCM with the obvious advantages of lower cation mixing, better phase transition stability, as well as more efficient charge transfer displays higher reversible capacity (i.e., 203.2 mAh g−1 at 50 mA g−1) and initial Coulombic efficiency (85%) compared to ex situ Zn‐NCM and the pristine NCM. Therefore, in situ doping is a novel and universal strategy to enhance battery performance of high‐energy‐density NCM cathodes for lithium‐ion batteries.

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“…[21,22] Construction of a maximal TPB region on the cathode by interfacial engineering is a practical strategy to improve the ZAB performance by exposing more catalytic active sites because only active sites located at the interface region can be fully effective. [23,24] A nearly two-dimensional (2D) triple-phase interface is created in a very narrow region on the catalyst layer in the cathode prepared by spraying and dripping catalysts on the surface of carbon paper. [25,26] To address the problem of insufficient TPB exposure of conventional electrodes, a threedimensional interfacial strategy is proposed.…”

Section: Introductionmentioning

confidence: 99%

Wood‐Derived Integral Air Electrode for Enhanced Interfacial Electrocatalysis in Rechargeable Zinc–Air Battery

Cui

Liu

Han

et al. 2021

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Zinc–air batteries (ZABs) are promising as energy storage devices owing to their high energy density and the safety of electrolytes. Construction of abundant triple‐phase boundary (TPB) effectively facilitates cathode reactions occurring at TPB. Herein, a wood‐derived integral air electrode containing Co/CoO nanoparticles and nitrogen‐doped carbonized wood (Co/CoO@NWC) is constructed with a dual catalytic function. The potential gap between oxygen reduction and evolution is shortened to 0.77 V. Liquid ZABs using Co/CoO@NWC as cathode exhibit high discharge specific capacity (800 mAh gZn−1), low charge–discharge gap (0.84 V), and long‐term cycling stability (270 h). Co/CoO@NWC also shows distinguished catalytic activity and stability in all‐solid‐state ZABs. The inherent layered porous and pipe structures of wood are well maintained in catalytically active carbon. The different hydrophilicity of carbonized wood and Co/CoO endow abundant TPBs for battery reaction. The Co/CoO located on TPB provides main active sites for oxygen reactions. The inherent pipe structures of wood carbon and the interaction between Co/CoO and NWC effectively prevent nanoparticles from aggregation. The design and preparation of this monolithic electrocatalyst contribute to the broad‐scale application of ZABs and promote the development of next‐generation biomass‐based storage devices.

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Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Cited by 61 publications

References 43 publications

Cobalt‐Free Cathode Materials: Families and their Prospects

Cobalt‐Free Cathode Materials: Families and their Prospects

Surface Reconstruction of Ni‐Rich Layered Cathodes: In Situ Doping versus Ex Situ Doping

Wood‐Derived Integral Air Electrode for Enhanced Interfacial Electrocatalysis in Rechargeable Zinc–Air Battery

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