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
Antimony doped tin oxide-coated LiNi0.5Co0.2Mn0.3O2 cathode materials with enhanced electrochemical performance for lithium-ion batteries
TL;DR: In this article, an antimony doped tin oxide (ATO) coating is formed to improve the structural stability, electrochemical performance and thermal stability of LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode materials.
Journal ArticleDOI
Modification of LiNi0.5Co0.2Mn0.3O2 cathode material using nano TiO2 to enhance the cycle stability in high-voltage ranges
Puliang Li,Longlong Xue,Yunjiao Li,Qianye Su,Yongxiang Chen,Guolin Cao,Tongxin Lei,Jie Zhu,Shiyi Deng +8 more
TL;DR: Nano TiO 2 with low crystallinity is employed to improve the highvoltage cycling performance of LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode material as discussed by the authors.
Journal ArticleDOI
Highly-ordered microstructure and well performance of LiNi0.6Mn0.2Co0.2O2 cathode material via the continuous microfluidic synthesis
TL;DR: Li et al. as discussed by the authors developed a continuous microfluidic reaction process to synthesize spherical carbonate precursors (Ni0.6Mn0.2Co 0.2CO3).
Journal ArticleDOI
A General One‐Pot Synthesis Strategy of 3D Porous Hierarchical Networks Crosslinked by Monolayered Nanoparticles Interconnected Nanoplates for Lithium Ion Batteries
Xinghua Tan,Xinghua Tan,Limin Guo,Limin Guo,Shengnan Liu,Shengnan Liu,Jianxin Wu,Tingqiao Zhao,Tingqiao Zhao,Juncong Ren,Yanlin Liu,Xiaohong Kang,Hanfu Wang,Lianfeng Sun,Lianfeng Sun,Weiguo Chu,Weiguo Chu +16 more
Journal ArticleDOI
High energy density and lofty thermal stability nickel-rich materials for positive electrode of lithium ion batteries
TL;DR: Li et al. as discussed by the authors presented a core-shell material composed of a core of NCM811 (R-3m) and a monoclinic (C2/m) Li2MnO3 shell.
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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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.