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
Investigation of Water-Washing Effect on Electrochemical Properties of Ni-Rich NCA Cathode Material for Lithium-Ion Batteries
Yukihiro Kato,Akiko Nagahara,Naren Gerile,Shota Fujinaka,Nishiki Hamamoto,Hitoshi Nishimura,Hideki Nakai +6 more
TL;DR: In this paper , the effect of water-washing on Ni-rich LiNi0.885Co0.100Al0.015O2 (NCA) cathode material was investigated.
Journal ArticleDOI
Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
Yao Li,Jingzhou Zhao,Meng-Qian Zhang,Lang Qiu,Zhuo Zheng,Yang Liu,Yan Nan Sun,Benhe Zhong,Yang Song,Xiaodong Guo +9 more
TL;DR: In this paper , a rock salt phase is epitaxially constructed on the surface of Li-rich Mn-based cathodes through Mo doping to improve their structural stability, which can stabilize lattice oxygen and inhibit the side reaction of the interface and structural phase transition.
Journal ArticleDOI
Illustration of capacity fading factors on the example of La2(Li0.5Ni0.5)O4‐modified high Ni layered oxide material
I. A. Ivanishcheva,A. V. Ivanishchev,Joon Ha Chang,Jung-Hoon Song,Su-Hyun Lee,Jae Joong Kim,Young-Je Kim,Sang Cheol Nam +7 more
TL;DR: In this paper , LiNi0.85Co0.1Mn0.05O2 was modified by perovskite-like phase La2(Li0.5Ni0,5NiO4), using lithium residual compounds (LRC) from NCM surface.
Journal ArticleDOI
Improving electrochemical performance of Ni-rich layered oxide cathodes via one-step dual modification strategy
Yuanmei Cao,Xiukang Yang,Lu Wang,Ling Xiao,Nianxin Fu,Lili Zou,Wenguang Ma,Zhe-Ting Liu,Xiao-Qin Wang,Li Liu,Hongbo Shu,Xianyou Wang +11 more
TL;DR: In this article , a one-step overall strategy from surface to bulk was proposed to simultaneously synthesize the Nb-doped and LiNbO3-coated LiNi0.83Co0.12Mn0.05O2 cathode materials.
References
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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.
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Journal ArticleDOI
Review of selected electrode–solution interactions which determine the performance of Li and Li ion batteries
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Journal ArticleDOI
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
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.