Cathodes: Li[Ni0.9Co0.09W0.01]O2: A New Type of Layered Oxide Cathode with High Cycling Stability (Adv. Energy Mater. 44/2019)

Ryu, Hoon‐Hee; Park, Kang-Joon; Yoon, Dae Ro; Aishova, Assylzat; Yoon, Chong Seung; Sun, Yang‐Kook

doi:10.1002/aenm.201970174

Cited by 24 publications

(21 citation statements)

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“…Herein, in order to verify the alleviated loss of lattice oxygen after modification, differential scanning calorimetry (DSC) was employed, as displayed in Figure A. [ 37 ] The distinct exothermic peak for charged 3% LCO is at 291.61 °C while that for the pristine sample is decreased to 284.76 °C along with an increased specific heat release (594.4 and 684.5 J g −1 for 3% LCO and pristine samples, respectively), strongly manifesting the improved thermal stability and the modified stability of lattice oxygen evolution. And it proves that the lattice oxygen evolution of the modified samples is effectively stabilized by the linkage‐functionalized modification.…”

Section: Resultsmentioning

confidence: 99%

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Chen

Zou

Deng

et al. 2020

Adv Funct Materials

174

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The practical application of Li-rich Mn-based oxide cathode is predominately retarded by the capacity decline and voltage fading, associated with the structure distortion and anionic redox reactions. Here, a linkagefunctionalized modification approach to tackle these challenges via a synchronous lithium oxidation strategy is reported. The doping of Ce in the bulk phase activates the pseudo-bonding effect, effectively stabilizing the lattice oxygen evolution and suppressing the structure distortion. Interestingly, it also induces the formation of spinel phase Li 4 Mn 5 O 12 in the subsurface, which in turn constructs the phase boundaries, thereby arousing the interior self-built-in electric field to prevent the outward migration of bulk oxygen anions and boost the charge transfer. Moreover, the formed coating layer Li 2 CeO 3 with oxygen vacancies accelerates Li + diffusion and mitigates electrolyte cauterization. The corresponding cathode exhibits superior longcycle stability after 300 cycles with only a 0.013% capacity drop and 1.76 mV voltage decay per cycle. This work sheds new light on the development of Li-rich Mn-based oxide cathodes toward high energy density applications.

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Section: Resultsmentioning

confidence: 99%

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Chen

Zou

Deng

et al. 2020

Adv Funct Materials

174

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“…i) DSC profiles for NCA89 and NCW90 in the delithiated state at 4.3 V. Reproduced with permission. [ 95 ] Copyright 2019, John Wiley and Sons. j) Charge–discharge voltage profiles at the fourth C/10 formation cycle, with cycling over 100 cycles at C/3 shown in the inset, k) d Q d V −1 curves at the fourth C/10 formation cycle, l) long‐term cycling over 1000 cycles at a C/2‐1C charge–discharge rate.…”

Section: Direction Of Co‐less Ni‐rich High Capacity Cathodes For Futurementioning

confidence: 99%

“…Double substitutions of Co 3+ and W 6+ into the LiNiO 2 cathode (Li[Ni 0.9 Co 0.09 W 0.01 ]O 2 , NCW90) provided considerably improved cell performance than that of the Li[Ni 0.885 Co 0.10 Al 0.015 ]O 2 (NCA89) cathode. [ 95 ] As shown in Figure 12f‐1,f‐2, the NCA89 and NCW90 cathode materials prepared via coprecipitation comprised microspherical particles with an average diameter of 9–10 µm. The nanosized primary particles agglomerated to form secondary particles.…”

Section: Direction Of Co‐less Ni‐rich High Capacity Cathodes For Futurementioning

confidence: 99%

Recent Progress and Perspective of Advanced High‐Energy Co‐Less Ni‐Rich Cathodes for Li‐Ion Batteries: Yesterday, Today, and Tomorrow

Choi

Voronina

Sun

et al. 2020

Advanced Energy Materials

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263

174

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With the ever‐increasing requirement for high‐energy density lithium‐ion batteries (LIBs) to drive pure/hybrid electric vehicles (EVs), considerable attention has been paid to the development of cathode materials with high energy densities because they ultimately determine the energy density of LIBs. Notably, the cost of cathode materials is still the main obstacle hindering the extensive application of EVs, with the cost accounting for 40% of the total cost of fabricating LIBs. Therefore, enhancing the energy density and simultaneously decreasing the cost of LIBs are essential for the success of EV/hybrid EV industries. Among the existing commercial cathodes, Ni‐rich layered cathodes are widely employed because of their high energy density, relatively good rate capability, and reasonable cycling performance. Ni‐rich layered cathodes containing Co are now being reconsidered due to the increasing price of Co, which is much higher than that of Ni and Mn. In this report, the recent developments and strategies in the improvement of the stabilities of the bulk and surface for Co‐less Ni‐rich layered cathode materials are reviewed.

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“…Doping has been widely demonstrated to be the simplest approach for enhancing the structural and thermal stabilities of the Ni‐rich cathodes. Typically, to date, a wide range of dopants including cations doping (Mg, Al, Ti, Zr, Nb, Cd, Ce, Mo, Ca, Ta, V, Na W, and B,) and anions doping (F, Cl, and S,) have been introduced into the Ni‐rich cathodes. The origins for the obviously improved structural stabilities by doping are closely associated with the three aspects as follows: i) the reinforcement of the bonding energy between TM ions and oxygen, ii) the suppression of the detrimental phase distortion from the layered to rocksalt structure, and iii) the promotion of the Li‐ion migration thanks to increased Li slab distance by the dopants .…”

Section: Strategies To Mitigate the Surface/interface Structure Degramentioning

confidence: 99%

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Liang

Zhang

Zhao

et al. 2019

Adv Materials Inter

151

111

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Nickel‐rich layered transition‐metal oxides with high‐capacity and high‐power capabilities are established as the principal cathode candidates for next‐generation lithium‐ion batteries. However, several intractable issues such as the poor thermal stability and rapid capacity fade as well as the air‐sensitivity particularly for the Ni content over 80% have seriously restricted their broadly practical applications. The properties and nature of the stable surface/interface, where the Li+ shuttles back and forth between the cathode and electrolyte, play a significant role in their ultimate lithium‐storage performance and industrial processability. Thus, tremendous efforts are made to in‐depth understanding of the essential origins of surface/interface structure degradation and efficient surface modification methodologies are intensively explored. The purpose of the contribution is first to provide a comprehensive review of the up‐to‐date mechanisms proposed to rationally elucidate the surface/interface behaviors, and then, focus on recent developed strategies to optimize the surface/interface structure and chemistry including synthetic condition regulation, surface doping, surface coating, dual doping‐coating modification, and concentration‐gradient structure as well as electrolyte additives. Finally, the perspective on future research trends and feasible approaches toward advanced Ni‐rich cathodes with stable surface/interface is presented briefly.

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Cathodes: Li[Ni_0.9Co_0.09W_0.01]O₂: A New Type of Layered Oxide Cathode with High Cycling Stability (Adv. Energy Mater. 44/2019)

Cited by 24 publications

References 0 publications

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Recent Progress and Perspective of Advanced High‐Energy Co‐Less Ni‐Rich Cathodes for Li‐Ion Batteries: Yesterday, Today, and Tomorrow

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

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