Journal ArticleDOI
A new type of protective surface layer for high-capacity Ni-based cathode materials: nanoscaled surface pillaring layer.
TLDR
This material showed excellent structural stability due to a pillar layer, corresponding to 85% capacity retention between 3.0 and 4.5 V at 60 °C after 100 cycles, and the amount of heat generation was decreased by 40%, compared to LiNi0.15O2.Abstract:
A solid solution series of lithium nickel metal oxides, Li[Ni1–xMx]O2 (with M = Co, Mn, and Al) have been investigated intensively to enhance the inherent structural instability of LiNiO2. However, when a voltage range of Ni-based cathode materials was increased up to >4.5 V, phase transitions occurring above 4.3 V resulted in accelerated formation of the trigonal phase (P3m1) and NiO phases, leading to and pulverization of the cathode during cycling at 60 °C. In an attempt to overcome these problems, LiNi0.62Co0.14Mn0.24O2 cathode material with pillar layers in which Ni2+ ions were resided in Li slabs near the surface having a thickness of ∼10 nm was prepared using a polyvinylpyrrolidone (PVP) functionalized Mn precursor coating on Ni0.7Co0.15Mn0.15(OH)2. We confirmed the formation of a pillar layer via various analysis methods (XPS, HRTEM, and STEM). This material showed excellent structural stability due to a pillar layer, corresponding to 85% capacity retention between 3.0 and 4.5 V at 60 °C after 10...read more
Citations
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Journal ArticleDOI
Nickel‐Rich Layered Lithium Transition‐Metal Oxide for High‐Energy Lithium‐Ion Batteries
TL;DR: The performance enhancement of Ni-rich cathode materials through structure tuning or interface engineering is summarized and the underlying mechanisms and remaining challenges will also be discussed.
Journal ArticleDOI
Guidelines and trends for next-generation rechargeable lithium and lithium-ion batteries.
TL;DR: This review summarizes the current trends and provides guidelines towards achieving next-generation rechargeable Li and Li-ion batteries with higher energy densities, better safety characteristics, lower cost and longer cycle life by addressing batteries using high-voltage cathodes, metal fluoride electrodes, chalcogen electrodes, Li metal anodes, high-capacity anodes as well as useful electrolyte solutions.
Journal ArticleDOI
High-voltage positive electrode materials for lithium-ion batteries
TL;DR: This review gives an account of the various emerging high-voltage positive electrode materials that have the potential to satisfy the requirements of lithium-ion batteries either in the short or long term, including nickel-rich layered oxides, lithium- rich layeredOxides, high- voltage spinel oxide compounds, and high- voltage polyanionic compounds.
Journal ArticleDOI
Prospect and Reality of Ni-Rich Cathode for Commercialization
TL;DR: In this paper, important stability issues and in-depth understanding of the nickel-rich cathode materials on the basis of the industrial electrode fabrication condition for the commercialization of the NRC-compliant cathode material are reviewed.
Journal ArticleDOI
A New Coating Method for Alleviating Surface Degradation of LiNi0.6Co0.2Mn0.2O2 Cathode Material: Nanoscale Surface Treatment of Primary Particles
TL;DR: This approach resulted in improved structural and thermal stability in the severe cycling-test environment at 60 °C between 3.0 and 4.45 V and at elevated temperatures, showing a rate capability that was comparable to that of the pristine sample.
References
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Emerging applications of atomic layer deposition for lithium-ion battery studies.
TL;DR: Recent advances in using ALD for LIB studies are thoroughly reviewed, covering two technical routes: one for designing and synthesizing new LIB components, i.e., anodes, cathodes, and solid electrolytes, and; 2) ALD used in modifying electrode properties via surface coating.
Journal ArticleDOI
Combining In Situ Synchrotron X‐Ray Diffraction and Absorption Techniques with Transmission Electron Microscopy to Study the Origin of Thermal Instability in Overcharged Cathode Materials for Lithium‐Ion Batteries
Kyung-Wan Nam,Seong-Min Bak,Seong-Min Bak,Enyuan Hu,Xiqian Yu,Youngning Zhou,Xiaojian Wang,Lijun Wu,Yimei Zhu,Kyung-Yoon Chung,Xiao-Qing Yang +10 more
TL;DR: In this paper, the structural changes in overcharged LixNi0.8Co0.15Al0.05O2 and lixNiNi1/3Co 1/3Mn 1 /3O2 cathode materials were investigated using time-resolved X-ray diffraction, X-Ray absorption, mass spectroscopy, and high-resolution transmission electron microscopy during heating.
Journal ArticleDOI
Cycle life improvement of ZrO2-coated spherical LiNi1/3Co1/3Mn1/3O2 cathode material for lithium ion batteries
TL;DR: In this paper, a modified synthesis process was developed based on co-precipitation method followed by spray drying process, which exhibited an improved rate capability and cycling stability under a high cut-off voltage of 4.5 V.
Journal ArticleDOI
Li2CO3 in LiNi0.8Co0.15Al0.05O2 cathodes and its effects on capacity and power
Guorong V. Zhuang,Guoying Chen,Joongpyo Shim,Xiangyun Song,Philip N. Ross,Thomas J. Richardson +5 more
TL;DR: Particle isolation is proposed to contribute to both capacity and power losses, and possible mechanisms related to the formation of Li 2 CO 3 are discussed in this article, where a bimodal distribution of active material in different states of charge is revealed.
Journal ArticleDOI
In situ X-ray diffraction techniques as a powerful tool to study battery electrode materials
M. Morcrette,Y. Chabre,Gavin Vaughan,Glenn G. Amatucci,Jean-Bernard Leriche,Sébastien Patoux,Christian Masquelier,Jean-Marie Tarascon +7 more
TL;DR: In this article, the performance of rechargeable Li-based batteries depend on many factors among which is the structural evolution of the electrode materials upon cycling, and efforts have been devoted towards reliable, rapid, and facile ways to perform in situ measurements.