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
Zero-Strain Cathodes for Lithium-Based Rechargeable Batteries: A Comprehensive Review
Journal ArticleDOI
Resynthesis of Ni-rich Li[Ni0.9Co0.05Mn0.05]O2 in simulated Li-ion battery leachate after saline discharge
Jimin Lee,Sang-Han Park,Seongdeock Jeong,Jangho Park,Wooseok Kim,Gyeong Han Ko,Kwangho Park,Hong-In Kim,Kyung Jung Kwon +8 more
TL;DR: In this paper , the state-of-the-art Ni-rich Li[Ni0.9Co0.05Mn0]O2 (NCM955) is resynthesized by a coprecipitation reaction in simulated LIB leachate after the saline discharge.
Journal ArticleDOI
Synergistic role of Sb doping and surface modification in high performance ultrahigh-nickel layered oxides cathode materials
TL;DR: Li et al. as mentioned in this paper designed and prepared the Sb-modified LiNi0.92Co0.04O2 (Sb-NCM) materials, which simultaneously realize synergistic role of Sb doping and surface modification.
Journal ArticleDOI
Surface engineering with ammonium niobium oxalate: a multifunctional strategy to enhance electrochemical performance and thermal stability of Ni-rich cathode materials at 4.5 V cutoff potential
Bo Wang,Bo Wang,Hailei Zhao,Feipeng Cai,Liu Zhongzhu,Gai Yang,Qin Xianzhong,Konrad Świerczek +7 more
TL;DR: In this paper, a facile and scalable Nb-modification strategy is proposed to remove the surface lithium residuals and in situ form Li-ion conductive LiNbO3 on Ni-rich LiNi0.6Co0.2O2 (NCM622).
References
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Journal ArticleDOI
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Positive Electrode Materials for Li-Ion and Li-Batteries†
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Journal ArticleDOI
High-energy cathode material for long-life and safe lithium batteries
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