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
Use of Ce to Reinforce the Interface of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for Lithium-Ion Batteries under High Operating Voltage
TL;DR: The modified Ni-rich materials fabricated with an erosion-resistant CeO2 layer outside and stronger Ce-O bonds inside with reduced Li+ /Ni2+ mixing exhibit excellent electrochemical properties, especially at high operating voltages.
Journal ArticleDOI
Layered ternary metal oxides: Performance degradation mechanisms as cathodes, and design strategies for high-performance batteries
TL;DR: In this article, the authors provide an easy entry for a comprehensive, systematic and deep understanding of the fundamentals, and offer a critical analysis and summary what have been done in the field and what are the challenges or hurdles to overcome.
Journal ArticleDOI
Advanced Lithium-Ion Batteries for Practical Applications: Technology, Development, and Future Perspectives
Sinho Choi,Guoxiu Wang +1 more
Journal ArticleDOI
Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries
Qinglu Fan,Shaodian Yang,Jun Liu,Haodong Liu,Kaiji Lin,Rui Liu,Chaoyu Hong,Liying Liu,Yan Chen,Ke An,Ping Liu,Zhicong Shi,Yong Yang +12 more
TL;DR: In this paper, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi0·8Co 0·1Mn0·1O2 (NCM811).
Journal ArticleDOI
Improving the cycling stability of Ni-rich cathode materials by fabricating surface rock salt phase
Yuefeng Su,Yang Yongqing,Lai Chen,Yun Lu,Liying Bao,Gang Chen,Zhiru Yang,Qiyu Zhang,Jing Wang,Renjie Chen,Shi Chen,Feng Wu +11 more
TL;DR: In this article, the effect of Mo doping on the structure, morphology, and electrochemical performances of Ni-rich cathode material has been investigated, and the results reveal that Mo doping may promote the formation of surface rock salt phase and expand the Li+ diffusion channels for Nirich material.
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.
Journal ArticleDOI
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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†
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.