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
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Journal ArticleDOI
Directly-regenerated LiCoO2 with a superb cycling stability at 4.6 V
Long Qie,garri,Maulik Patel +2 more
TL;DR: Li et al. as mentioned in this paper constructed a protective layer onto the regenerated LCO particles to suppress the O3 to H1-3 phase transition at 4.55 V and achieved a high specific capacity retention of 85.9% after 100 cycles with a charging cut-off voltage of 4.6 V.
Journal ArticleDOI
Suitability and performance of NaNi1-x(VO)xPO4 mixed polyanion glass and Glass-Ceramic cathodes for Na-ion battery
TL;DR: In this article , the performance of mixed polyanion glass and glass ceramic samples of NaNi 1-x (VO) x PO 4 (x = 0.1, 0.3 and 0.5 mol %) were investigated as flexible cathode for SIBs.
Posted ContentDOI
Comparison Study of Thermal-Driven Micro-Structure in High Ni-Cathode for Lithium-Ion Batteries; Critical Calcination Temperature for Poly-Crystalline and Single-Crystalline Design
References
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Journal ArticleDOI
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
TL;DR: The effective ionic radii of Shannon & Prewitt [Acta Cryst. (1969), B25, 925-945] are revised to include more unusual oxidation states and coordinations as mentioned in this paper.
Journal ArticleDOI
Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors
Nam-Soon Choi,Zonghai Chen,Stefan Freunberger,Xiulei Ji,Yang-Kook Sun,Khalil Amine,Gleb Yushin,Linda F. Nazar,Jaephil Cho,Peter G. Bruce +9 more
TL;DR: The Review will consider some of the current scientific issues underpinning lithium batteries and electric double-layer capacitors.
Journal ArticleDOI
Review of selected electrode–solution interactions which determine the performance of Li and Li ion batteries
TL;DR: In this article, the performance of Li, Li-C anodes and Li x MO y cathodes depends on their surface chemistry in solutions, which either contribute to electrode stabilization or to capacity fading due to an increase in the electrodes' impedance.
Journal ArticleDOI
Positive Electrode Materials for Li-Ion and Li-Batteries†
TL;DR: In this article, positive electrodes for Li-ion and lithium batteries have been under intense scrutiny since the advent of the Li ion cell in 1991, and a growing interest in developing Li−sulfur and Li−air batteries that have the potential for vastly increased capacity and energy density, which is needed to power large scale systems.
Journal ArticleDOI
High-energy cathode material for long-life and safe lithium batteries
TL;DR: The results suggest that the cathode material reported on could enable production of batteries that meet the demanding performance and safety requirements of plug-in hybrid electric vehicles.