Rate dependent structural transition and cycling stability of a lithium-rich layered oxide material

2019 ◽  
Vol 21 (39) ◽  
pp. 21984-21990 ◽  
Author(s):  
Songyoot Kaewmala ◽  
Visittapong Yordsri ◽  
Wanwisa Limphirat ◽  
Jeffrey Nash ◽  
Sutham Srilomsak ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Cathode Materials ◽  
Structural Transition ◽  
Cycling Stability ◽  
Oxide Material ◽  
Oxide Materials ◽  
Promising Candidate ◽  
Layered Oxide ◽  
Rate Dependent

Lithium-rich layered oxide materials, xLi2MnO3·(1 − x)LiMO2 (M = Mn, Fe, Co, Ni, etc.), are a promising candidate for use as cathode materials in the batteries of electric vehicles (EVs).

Rate Dependent Structural Changes, Cycling Stability, and Li-Ion Diffusivity in a Layered-Layered Oxide Cathode Material after Prolonged Cycling

2021 ◽  
Author(s):  
Songyoot Kaewmala ◽  
Wanwisa Limphirat ◽  
Visittapong Yordsri ◽  
Jeffrey Nash ◽  
Sutham Srilomsak ◽  
...  
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Large Scale ◽  
Structural Changes ◽  
Cycling Stability ◽  
Li Ion Batteries ◽  
Layered Oxide ◽  
Rate Dependent ◽  
Oxide Cathode ◽  
Li Ion

Li-rich layered oxide (LLO) cathode materials, xLi2MnO3·(1-x)LiCoO2 (0<x<1, M= Mn, Ni, Co, etc.) are considered promising cathode materials in Li-ion batteries for large scale applications.

Boosting Cycling Stability of Ni-rich Layered Oxide Cathode by Dry Coating of Ultrastable Li3V2(PO4)3 Nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Dongdong Wang ◽  
Qizhang Yan ◽  
Mingqian Li ◽  
Hongpeng Gao ◽  
Jianhua Tian ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
Next Generation ◽  
Layered Oxides ◽  
Dry Coating ◽  
Layered Oxide ◽  
Oxide Cathode

Nickel (Ni)-rich layered oxides such as LiNi0.6Co0.2Mn0.2O2 (NCM622) represent one of the most promising candidates for the next-generation high-energy lithium-ion batteries (LIBs). However, the pristine Ni-rich cathode materials usually suffer...

Enhanced cycling stability of boron-doped lithium-rich layered oxide cathode materials by suppressing transition metal migration

2019 ◽  
Vol 7 (7) ◽  
pp. 3375-3383 ◽  
Author(s):  
Zhenhe Sun ◽  
Lingqun Xu ◽  
Caiqiao Dong ◽  
Hongtao Zhang ◽  
Mingtao Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Cathode Materials ◽  
Cycling Stability ◽  
Capacitive Performance ◽  
Layered Oxide ◽  
Boron Doped ◽  
Oxide Cathode ◽  
Attractive Candidate ◽  
Metal Migration

Lithium-rich layered oxide (LLO) has been considered as an attractive candidate due to its high capacitive performance.

scholarly journals Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Renwei Lu ◽  
Xiaolong Ren ◽  
Chong Wang ◽  
Changzhen Zhan ◽  
Ding Nan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Cathode Materials ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

scholarly journals Thermochemical Energy Storage Performance Analysis of (Fe,Co,Mn)Ox Mixed Metal Oxides

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 362
Author(s):  
Yabibal Getahun Dessie ◽  
Qi Hong ◽  
Bachirou Guene Lougou ◽  
Juqi Zhang ◽  
Boshu Jiang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Redox Reaction ◽  
Gas Flow ◽  
Oxygen Exchange ◽  
Engineering Industry ◽  
Oxide Material ◽  
Oxide Materials ◽  
Uptake Ratio

Metal oxide materials are known for their ability to store thermochemical energy through reversible redox reactions. Metal oxides provide a new category of materials with exceptional performance in terms of thermochemical energy storage, reaction stability and oxygen-exchange and uptake capabilities. However, these characteristics are predicated on the right combination of the metal oxide candidates. In this study, metal oxide materials consisting of pure oxides, like cobalt(II) oxide, manganese(II) oxide, and iron(II, III) oxide (Fe3O4), and mixed oxides, such as (100 wt.% CoO, 100 wt.% Fe3O4, 100 wt.% CoO, 25 wt.% MnO + 75 wt.% CoO, 75 wt.% MnO + 25 wt.% CoO) and 50 wt.% MnO + 50.wt.% CoO), which was subjected to a two-cycle redox reaction, was proposed. The various mixtures of metal oxide catalysts proposed were investigated through the thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), energy dispersive X-ray (EDS), and scanning electron microscopy (SEM) analyses. The effect of argon (Ar) and oxygen (O2) at different gas flow rates (20, 30, and 50 mL/min) and temperature at thermal charging step and thermal discharging step (30–1400 °C) during the redox reaction were investigated. It was revealed that on the overall, 50 wt.% MnO + 50 wt.% CoO oxide had the most stable thermal stability and oxygen exchange to uptake ratio (0.83 and 0.99 at first and second redox reaction cycles, respectively). In addition, 30 mL/min Ar–20 mL/min O2 gas flow rate further increased the proposed (Fe,Co,Mn)Ox mixed oxide catalyst’s cyclic stability and oxygen uptake ratio. SEM revealed that the proposed (Fe,Co,Mn)Ox material had a smooth surface and consisted of polygonal-shaped structures. Thus, the proposed metallic oxide material can effectively be utilized for high-density thermochemical energy storage purposes. This study is of relevance to the power engineering industry and academia.

scholarly journals Li[Ni 0.9 Co 0.09 W 0.01 ]O 2 : A New Type of Layered Oxide Cathode with High Cycling Stability

2019 ◽  
Vol 9 (44) ◽  
pp. 1902698 ◽  
Author(s):  
Hoon‐Hee Ryu ◽  
Kang‐Joon Park ◽  
Dae Ro Yoon ◽  
Assylzat Aishova ◽  
Chong S. Yoon ◽  
...  
Keyword(s):  
Cycling Stability ◽  
Layered Oxide ◽  
Oxide Cathode ◽  
New Type

scholarly journals Dislocation-mediated shear amorphization in boron carbide

2021 ◽  
Vol 7 (8) ◽  
pp. eabc6714 ◽  
Author(s):  
Kolan Madhav Reddy ◽  
Dezhou Guo ◽  
Shuangxi Song ◽  
Chun Cheng ◽  
Jiuhui Han ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Structural Transition ◽  
Activation Volume ◽  
Structural Evolution ◽  
Dislocation Nucleation ◽  
Superhard Materials ◽  
Rate Dependent ◽  
Transmission Electron ◽  
Lower Activation ◽  
Underlying Mechanisms

The failure of superhard materials is often associated with stress-induced amorphization. However, the underlying mechanisms of the structural evolution remain largely unknown. Here, we report the experimental measurements of the onset of shear amorphization in single-crystal boron carbide by nanoindentation and transmission electron microscopy. We verified that rate-dependent loading discontinuity, i.e., pop-in, in nanoindentation load-displacement curves results from the formation of nanosized amorphous bands via shear amorphization. Stochastic analysis of the pop-in events reveals an exceptionally small activation volume, slow nucleation rate, and lower activation energy of the shear amorphization, suggesting that the high-pressure structural transition is activated and initiated by dislocation nucleation. This dislocation-mediated amorphization has important implications in understanding the failure mechanisms of superhard materials at stresses far below their theoretical strengths.

Studies of anisotropic thermoelectricity in layered oxide materials and time-resolved phonon kinetics

1999 ◽  
Vol 263-264 ◽  
pp. 617-620 ◽  
Author(s):  
D Van Vechten ◽  
K.S Wood ◽  
G.G Fritz ◽  
J.S Horwitz ◽  
R.M Stroud ◽  
...  
Keyword(s):  
Oxide Materials ◽  
Time Resolved ◽  
Layered Oxide

Lithium iron phosphates as cathode materials in lithium ion batteries for electric vehicles

2012 ◽  
Author(s):  
Gaojun Wang ◽  
Linfeng Chen ◽  
Gyanesh N. Mathur ◽  
Vijay K. Varadan
Keyword(s):  
Lithium Ion Batteries ◽  
Electric Vehicles ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Iron Phosphates
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