Regulating Anion Redox and Cation Migration to Enhance the Structural Stability of Li-Rich Layered Oxides

2021 ◽  
Author(s):  
Tianshuo Wang ◽  
Chunxiao Zhang ◽  
Shuwei Li ◽  
Xi Shen ◽  
Liangjun Zhou ◽  
...  
Keyword(s):  
Structural Stability ◽  
Layered Oxides ◽  
Cation Migration

scholarly journals Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides

2014 ◽  
Vol 16 (28) ◽  
pp. 14665-14668 ◽  
Author(s):  
Danna Qian ◽  
Bo Xu ◽  
Miaofang Chi ◽  
Ying Shirley Meng
Keyword(s):  
Oxygen Vacancies ◽  
Layered Oxides ◽  
Cation Migration

scholarly journals Coupling between oxygen redox and cation migration explains unusual electrochemistry in lithium-rich layered oxides

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
William E. Gent ◽  
Kipil Lim ◽  
Yufeng Liang ◽  
Qinghao Li ◽  
Taylor Barnes ◽  
...  
Keyword(s):  
Layered Oxides ◽  
Cation Migration

Dual-Site Doping Strategy for Enhancing the Structural Stability of Lithium-Rich Layered Oxides

2021 ◽  
Author(s):  
Wei Tang ◽  
Jidong Duan ◽  
Jianlong Xie ◽  
Yan Qian ◽  
Jing Li ◽  
...  
Keyword(s):  
Structural Stability ◽  
Layered Oxides ◽  
Dual Site

Structurally Regulating Cation Migration Suppresses Voltage Fade and Redox Asymmetry in Lithium-Rich Layered Oxides

2020 ◽  
Vol MA2020-02 (1) ◽  
pp. 105-105
Author(s):  
Donggun Eum ◽  
Byunghoon Kim ◽  
Sung Joo Kim ◽  
Hyeokjun Park ◽  
Kisuk Kang
Keyword(s):  
Layered Oxides ◽  
Cation Migration ◽  
Voltage Fade

scholarly journals Suppressing the voltage decay of low-cost P2-type iron-based cathode materials for sodium-ion batteries

2018 ◽  
Vol 6 (42) ◽  
pp. 20795-20803 ◽  
Author(s):  
Shuyin Xu ◽  
Jinpeng Wu ◽  
Enyuan Hu ◽  
Qinghao Li ◽  
Jienan Zhang ◽  
...  
Keyword(s):  
Structural Stability ◽  
Cathode Materials ◽  
Low Cost ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Layered Oxides ◽  
Cu Doping ◽  
Voltage Decay ◽  
Iron Based

We demonstrate the voltage decay in Fe based layered oxides comes from a dynamic origin. With excess Cu doping, Fe migration can be mitigated and structural stability can be maintained.

Unraveling vacancy-induced oxygen redox reaction and structural stability in Na-based layered oxides

2021 ◽  
pp. 133962
Author(s):  
Mobinul Islam ◽  
Muhammad Akbar ◽  
Daseul Han ◽  
Basit Ali ◽  
Yong Jeong Choi ◽  
...  
Keyword(s):  
Structural Stability ◽  
Redox Reaction ◽  
Layered Oxides

Time-resolved high-resolution electron microscopy of structural stability in mgo clusters

1996 ◽  
Vol 54 ◽  
pp. 672-673
Author(s):  
T. Kizuka ◽  
N. Tanaka
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Magnesium Oxide ◽  
Structural Stability ◽  
High Resolution Electron Microscopy ◽  
Video Tape ◽  
Solid State Physics ◽  
Time Resolved ◽  
Resolution Electron ◽  
Structural And Functional Properties

Structure and stability of atomic clusters have been studied by time-resolved high-resolution electron microscopy (TRHREM). Typical examples are observations of structural fluctuation in gold (Au) clusters supported on silicon oxide films, graphtized carbon films and magnesium oxide (MgO) films. All the observations have been performed on the clusters consisted of single metal element. Structural stability of ceramics clusters, such as metal-oxide, metal-nitride and metal-carbide clusters, has not been observed by TRHREM although the clusters show anomalous structural and functional properties concerning to solid state physics and materials science.In the present study, the behavior of ceramic, magnesium oxide (MgO) clusters is for the first time observed by TRHREM at 1/60 s time resolution and at atomic resolution down to 0.2 nm.MgO and gold were subsequently deposited on sodium chloride (001) substrates. The specimens, single crystalline MgO films on which Au particles were dispersed were separated in distilled water and observed by using a 200-kV high-resolution electron microscope (JEOL, JEM2010) equipped with a high sensitive TV camera and a video tape recorder system.

A new lithium diffusion model in layered oxides based on asymmetric but reversible transition metal migration

2020 ◽  
Vol 13 (4) ◽  
pp. 1269-1278 ◽  
Author(s):  
Kyojin Ku ◽  
Byunghoon Kim ◽  
Sung-Kyun Jung ◽  
Yue Gong ◽  
Donggun Eum ◽  
...  
Keyword(s):  
Transition Metal ◽  
Diffusion Model ◽  
Layered Oxides ◽  
Layered Oxide ◽  
Reversible Transition ◽  
Lithium Diffusion ◽  
Metal Migration

We propose a new lithium diffusion model involving coupled lithium and transition metal migration, peculiarly occurring in a lithium-rich layered oxide.

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