scholarly journals Formation of different shell structures in lithium-rich layered oxides and their influence on electrochemical properties

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18589-18596 ◽  
Author(s):  
Kai Cao ◽  
Kangping Wang ◽  
Taotao Shen ◽  
Wenlou Wang ◽  
Dongming Chen
Keyword(s):  
Electrochemical Properties ◽  
Shell Structures ◽  
Shell Layer ◽  
Layered Oxides ◽  
Oxide Particles

An ultra-thin spinel Li4Mn5O12 shell layer on the surface of lithium-rich oxide particles was investigated.

Effect of valence states of Ni and Mn on the structural and electrochemical properties of Li1.2NixMn0.8−xO2 cathode materials for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 53662-53668 ◽  
Author(s):  
Shaokun Chong ◽  
Yongning Liu ◽  
Wuwei Yan ◽  
Yuanzhen Chen
Keyword(s):  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Layered Oxides ◽  
Capacity Fading ◽  
Voltage Decay ◽  
Valence States

Severe capacity fading and voltage decay of Li-rich layered oxides for lithium-ion batteries remain the major bottlenecks to commercialization.

scholarly journals Electrochemical properties and structural evolution of O3-type layered sodium mixed transition metal oxides with trivalent nickel

2017 ◽  
Vol 5 (9) ◽  
pp. 4596-4606 ◽  
Author(s):  
Plousia Vassilaras ◽  
Deok-Hwang Kwon ◽  
Stephen T. Dacek ◽  
Tan Shi ◽  
Dong-Hwa Seo ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Metal Oxides ◽  
Electrochemical Properties ◽  
Transition Metal Oxides ◽  
Structural Evolution ◽  
Redox Behavior ◽  
Layered Oxides ◽  
Mixed Transition

We demonstrate how to control the structural evolution and associated redox behavior in Na layered oxides by mixing trivalent Ni with other transition metals.

Structure, and magnetic and electrochemical properties of layered oxides, Li2IrO3

2003 ◽  
Vol 13 (4) ◽  
pp. 957-962 ◽  
Author(s):  
Hironori Kobayashi ◽  
Mitsuharu Tabuchi ◽  
Masahiro Shikano ◽  
Hiroyuki Kageyama ◽  
Ryoji Kanno
Keyword(s):  
Electrochemical Properties ◽  
Layered Oxides

Improving Electrochemical Properties by Sodium Doping for Lithium-Rich Layered Oxides

2020 ◽  
Vol 3 (9) ◽  
pp. 8953-8959
Author(s):  
Kai Zhang ◽  
Hang Sheng ◽  
Xiongwei Wu ◽  
Lijun Fu ◽  
Zhonghua Liu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Layered Oxides ◽  
Sodium Doping

scholarly journals Electrochemical Properties and Ex Situ Study of Sodium Intercalation Cathode P2/P3-NaNi1/3Mn1/3Co1/3O2

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Minh Le Nguyen ◽  
Hoang Van Nguyen ◽  
Man Van Tran ◽  
Phung My Loan Le
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Charge Transfer Resistance ◽  
Ex Situ ◽  
Layered Oxides ◽  
Transfer Resistance ◽  
Complex Phase ◽  
Voltage Range ◽  
Sol Gel Process

In recent work, P2/P3-NaNi1/3Mn1/3Co1/3O2 (NaNMC) was obtained by the sol-gel process followed by calcination of the precursor at 900°C for 12 h. The electrochemical properties of NaNMC were investigated in the voltage range of 2.0–4.0 V. The material exhibited an initial discharge capacity of 107 mAh·g−1 and good capacity retention of 82.2% after 100 cycles. Ex situ XRD performance showed that the P3-phase transformed from the P3- to O1-phase and vice versa, while the P2-phase remained stable during the sodium intercalation. The kinetic of sodium intercalation of NaNMC upon reversible Na+ insertion/deinsertion was evaluated via a Galvanostatic Intermittence Titration Technique (GITT) and Electrochemical impedance spectroscopy (EIS). The diffusion coefficients of Na+ ion deduced from the GITT curve have a broad distribution ranging from 10−10 to 10−11 cm2·s−1 for the charging/discharging process. Besides, the evolution of diffusion coefficient and charge transfer resistance is consistent with the complex phase transition generally observed in sodium layered oxides.

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