Aluminium vanadate with unsaturated coordinated V centers and oxygen vacancies: surface migration and partial phase transformation mechanism in high performance zinc-ion batteries

2022 ◽  
Author(s):  
Yang Liu ◽  
Xiao Xiao ◽  
Xing Liu ◽  
Lei Lei Cui ◽  
Yun Gong
Keyword(s):  
Phase Transformation ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Zinc Ion ◽  
Partial Transformation ◽  
Transformation Mechanism ◽  
Partial Phase ◽  
Surface Migration

Aluminium vanadate with unsaturated coordinated V centers and oxygen vacancies shows excellent Zn2+ storage due to the low Zn2+ migration barrier along the (001) surface, the co-(de)intercalation mechanism of H+/Zn2+ and the partial transformation.

Oxygen vacancies-enriched Mn3O4 enabling high-performance rechargeable aqueous Zinc-ion battery

2021 ◽  
pp. 100518
Author(s):  
Can Huang ◽  
Qiufan Wang ◽  
Guofu Tian ◽  
Daohong Zhang
Keyword(s):  
High Performance ◽  
Oxygen Vacancies ◽  
Zinc Ion

scholarly journals Finite Strain Constitutive Modelling of Shape Memory Alloys Considering Partial Phase Transformation with Transformation-Induced Plasticity

2021 ◽  
Author(s):  
Giulia Scalet ◽  
Anargyros Karakalas ◽  
Lei Xu ◽  
Dimitris Lagoudas
Keyword(s):  
Phase Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Mechanical Loading ◽  
Finite Strain ◽  
Material Behavior ◽  
Partial Transformation ◽  
Element Analysis ◽  
Partial Phase ◽  
Transformation Induced Plasticity

AbstractThis paper presents a unified modelling effort to describe partial phase transformation during cyclic thermo-mechanical loading in Shape Memory Alloys (SMA). To this purpose, a three-dimensional (3D) finite strain constitutive model considering TRansformation-Induced Plasticity (TRIP) is combined with a modified hardening function to enable the accurate and efficient prediction of partial transformations during cyclic thermo-mechanical loading. The capabilities of the proposed model are demonstrated by predicting the behavior of the material under pseudoelastic and actuation operation using finite element analysis. Numerical results of the modified model are presented and compared with the original model without considering the partial transformation feature as well as with uniaxial actuation experimental data. Various aspects of cyclic material behavior under partial transformation are analyzed and discussed for different SMA systems.

Electrochemical Injection Oxygen Vacancies in Layered Ca2Mn3O8 for Boosting Zinc-Ion Storage

2021 ◽  
Author(s):  
Lipeng Wang ◽  
Ziyi Cao ◽  
Peiyuan Zhuang ◽  
Jiaxin Li ◽  
Hang Chu ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Zinc Ion ◽  
Ion Storage

scholarly journals Enhanced Reversible Zinc Ion Intercalation in Deficient Ammonium Vanadate for High-Performance Aqueous Zinc-Ion Battery

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Quan Zong ◽  
Wei Du ◽  
Chaofeng Liu ◽  
Hui Yang ◽  
Qilong Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Interlayer Spacing ◽  
Zinc Ion ◽  
Carbon Cloth ◽  
High Specific Capacity ◽  
Irreversible Reaction ◽  
Ammonium Vanadate ◽  
Structure Degradation

AbstractAmmonium vanadate with bronze structure (NH4V4O10) is a promising cathode material for zinc-ion batteries due to its high specific capacity and low cost. However, the extraction of $${\text{NH}}_{{4}}^{ + }$$ NH 4 + at a high voltage during charge/discharge processes leads to irreversible reaction and structure degradation. In this work, partial $${\text{NH}}_{{4}}^{ + }$$ NH 4 + ions were pre-removed from NH4V4O10 through heat treatment; NH4V4O10 nanosheets were directly grown on carbon cloth through hydrothermal method. Deficient NH4V4O10 (denoted as NVO), with enlarged interlayer spacing, facilitated fast zinc ions transport and high storage capacity and ensured the highly reversible electrochemical reaction and the good stability of layered structure. The NVO nanosheets delivered a high specific capacity of 457 mAh g−1 at a current density of 100 mA g−1 and a capacity retention of 81% over 1000 cycles at 2 A g−1. The initial Coulombic efficiency of NVO could reach up to 97% compared to 85% of NH4V4O10 and maintain almost 100% during cycling, indicating the high reaction reversibility in NVO electrode.

A High-Performance Free-Standing Zn Anode for Flexible Zinc-Ion Batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Chenxi Gao ◽  
Jiawei Wang ◽  
Yuan Huang ◽  
Zixuan Li ◽  
Jiyan Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Low Cost ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Free Standing ◽  
Energy Device ◽  
Zn Anode ◽  
Significant Attention

Zinc-ion batteries (ZIBs) have attracted significant attention owing to their high safety, high energy density, and low cost. ZIBs have been studied as a potential energy device for portable and...

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