scholarly journals In-situ electrochemical modification of pre-intercalated vanadium bronze cathodes for aqueous zinc-ion batteries

2022 ◽  
Author(s):  
Jianwei Li ◽  
Ningyun Hong ◽  
Ningjing Luo ◽  
Haobo Dong ◽  
Liqun Kang ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Specific Capacity ◽  
Zinc Ion ◽  
Maximum Energy ◽  
Ex Situ ◽  
Electrochemical Kinetics ◽  
High Specific Capacity ◽  
Anodic Oxidation Method ◽  
Power Densities

AbstractVanadium bronzes have been well-demonstrated as promising cathode materials for aqueous zinc-ion batteries. However, conventional single-ion pre-intercalated V2O5 nearly reached its energy/power ceiling due to the nature of micro/electronic structures and unfavourable phase transition during Zn2+ storage processes. Here, a simple and universal in-situ anodic oxidation method of quasi-layered CaV4O9 in a tailored electrolyte was developed to introduce dual ions (Ca2+ and Zn2+) into bilayer δ-V2O5 frameworks forming crystallographic ultra-thin vanadium bronzes, Ca0.12Zn0.12V2O5·nH2O. The materials deliver transcendental maximum energy and power densities of 366 W h kg−1 (478 mA h g−1 @ 0.2 A g−1) and 6627 W kg−1 (245 mA h g−1 @ 10 A g−1), respectively, and the long cycling stability with a high specific capacity up to 205 mA h g−1 after 3000 cycles at 10 A g−1. The synergistic contributions of dual ions and Ca2+ electrolyte additives on battery performances were systematically investigated by multiple in-/ex-situ characterisations to reveal reversible structural/chemical evolutions and enhanced electrochemical kinetics, highlighting the significance of electrolyte-governed conversion reaction process. Through the computational approach, reinforced “pillar” effects, charge screening effects and regulated electronic structures derived from pre-intercalated dual ions were elucidated for contributing to boosted charge storage properties.

Suppressing vanadium dissolution of V2O5via in situ polyethylene glycol intercalation towards ultralong lifetime room/low-temperature zinc-ion batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Chunfa Lin ◽  
Fenqiang Qi ◽  
Huilong Dong ◽  
Xiao Li ◽  
Chunping Shen ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Low Temperature ◽  
Specific Capacity ◽  
Zinc Ion ◽  
High Specific Capacity ◽  
Temperature Performance ◽  
Ion Storage ◽  
Oxide Composites ◽  
Storage Properties

The polyethylene glycol pre-intercalated vanadium oxide composites deliver superior zinc-ion storage properties with high specific capacity, stable cycling capability, excellent rate and low-temperature performance.

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.

scholarly journals Rechargeable Aqueous Zinc-Ion Batteries in MgSO4/ZnSO4 Hybrid Electrolytes

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yingmeng Zhang ◽  
Henan Li ◽  
Shaozhuan Huang ◽  
Shuang Fan ◽  
Lingna Sun ◽  
...  
Keyword(s):  
Current Density ◽  
Specific Capacity ◽  
Cost Effective ◽  
Reversible Capacity ◽  
Zinc Ion ◽  
Rate Performance ◽  
Capacity Fading ◽  
Battery System ◽  
High Specific Capacity ◽  
A Current

AbstractMgSO4 is chosen as an additive to address the capacity fading issue in the rechargeable zinc-ion battery system of MgxV2O5·nH2O//ZnSO4//zinc. Electrolytes with different concentration ratios of ZnSO4 and MgSO4 are investigated. The batteries measured in the 1 M ZnSO4−1 M MgSO4 electrolyte outplay other competitors, which deliver a high specific capacity of 374 mAh g−1 at a current density of 100 mA g−1 and exhibit a competitive rate performance with the reversible capacity of 175 mAh g−1 at 5 A g−1. This study provides a promising route to improve the performance of vanadium-based cathodes for aqueous zinc-ion batteries with electrolyte optimization in cost-effective electrolytes.

Flower-like C@V2O5 microspheres as highly electrochemically active cathode in aqueous zinc-ion batteries

2020 ◽  
Vol 10 (10) ◽  
pp. 1697-1703
Author(s):  
Zebin Wu ◽  
Wei Zhou ◽  
Zhen Liu ◽  
Yijie Zhou ◽  
Guilin Zeng ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Retention Rate ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Zinc Ion ◽  
Rate Performance ◽  
Capacity Retention ◽  
Facile Hydrothermal Method ◽  
High Specific Capacity ◽  
Electrochemically Active

Flower-like C@V2O5 microspheres with high specific capacity were synthesized by a facile hydrothermal method. The microstructure, specific capacity and electrochemical properties of C@V2O5 microspheres were studied. Results showed that the C@V2O5 microspheres with a diameter of ∼3 m are covered over by V2O5 nanosheets, and therefore have a large surface area which is almost 5 times higher than that of pure V2O5 powders. Moreover, the initial specific capacity of C@V2O5 microsphere is as high as 247.42 mAh · g–1, and after 100 cycles, the capacity retention rate is still 99.4%. Compared with pure V2O5, flower-like C@V2O5 microspheres show higher discharge specific capacity, better rate performance and more stable cycling performance.

scholarly journals Synthesis and electrochemical performance of NaV3O8 nanobelts for Li/Na-ion batteries and aqueous zinc-ion batteries

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20549-20556 ◽  
Author(s):  
Fang Hu ◽  
Di Xie ◽  
Fuhan Cui ◽  
Dongxu Zhang ◽  
Guihong Song
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacity ◽  
Zinc Ion ◽  
Cycle Performance ◽  
Rate Performance ◽  
High Specific Capacity ◽  
Excellent Electrochemical Performance

Compared to the electrochemical performance for LIBs and NIBs, NaV3O8 nanobelts electrode for ZIBs shows excellent electrochemical performance, including high specific capacity of 421 mA h g−1 at 100 mA g−1, good rate performance and cycle performance.

Ordered mesoporous TiC–C composites as cathode materials for Li–O2 batteries

2016 ◽  
Vol 52 (13) ◽  
pp. 2713-2716 ◽  
Author(s):  
Feilong Qiu ◽  
Ping He ◽  
Jie Jiang ◽  
Xueping Zhang ◽  
Shengfu Tong ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Specific Capacity ◽  
High Specific Capacity ◽  
Ordered Mesoporous ◽  
Low Overpotential

Ordered mesoporous TiC–C (OMTC) composites were prepared and served as catalysts for nonaqueous Li–O2 batteries. The OMTC cathodes showed high specific capacity, low overpotential and good cyclability. Furthermore, the discharge and charge processes were investigated extensively by XRD, XPS and in situ GC-MS methods.

In situ growth of novel nickel diselenide nanoarrays with high specific capacity as the electrode material of flexible hybrid supercapacitors

2019 ◽  
Vol 10 (5) ◽  
pp. 1591-1601 ◽  
Author(s):  
Yongpan Gu ◽  
Weimin Du ◽  
Yusuf Darrat ◽  
Mahdi Saleh ◽  
Yuxin Huang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Specific Capacity ◽  
In Situ Growth ◽  
High Specific Capacity ◽  
Hybrid Supercapacitors

In situ synthesis of hierarchical CoFe2O4 nanoclusters/graphene aerogels and their high performance for lithium-ion batteries

2015 ◽  
Vol 17 (40) ◽  
pp. 27109-27117 ◽  
Author(s):  
Beibei Wang ◽  
Gang Wang ◽  
Zhengyuan Lv ◽  
Hui Wang
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Solvothermal Method ◽  
Specific Capacity ◽  
Lithium Ion ◽  
In Situ Synthesis ◽  
High Specific Capacity ◽  
Graphene Aerogels ◽  
Excellent Cycling Stability

In this article, we demonstrate a simple solvothermal method towards in situ growth of hierarchical CoFe2O4 nanoclusters on graphene aerogels (GAs). The CoFe2O4/GAs electrode exhibits high specific capacity, excellent cycling stability and superior rate capabilities in both half and full cells.

Co2P nanoparticles encapsulated in 3D porous N-doped carbon nanosheet networks as an anode for high-performance sodium-ion batteries

2018 ◽  
Vol 6 (5) ◽  
pp. 2139-2147 ◽  
Author(s):  
Dan Zhou ◽  
Li-Zhen Fan
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
Cobalt Nitrate ◽  
Cycling Stability ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
High Specific Capacity

A novel Co2P-3D PNC composite with Co2P NPs encapsulated in 3D porous N-doped carbon nanosheet networks was synthesized by a cobalt nitrate-induced PVP-blowing method combined with an in situ phosphidation process. The resultant Co2P-3D PNC anode delivers high specific capacity, enhanced rate capability, and improved cycling stability.

Insight into the charging-discharging of magnetite electrodes: In situ XAS and DFT study

2021 ◽  
Author(s):  
Chandrani Nayak ◽  
Abharana N ◽  
Brindaban Modak ◽  
Kruti K Halankar ◽  
Shambhu Nath Jha ◽  
...  
Keyword(s):  
Electrode Material ◽  
Specific Capacity ◽  
Dft Study ◽  
Li Ion Batteries ◽  
Capacity Fading ◽  
High Specific Capacity ◽  
Li Ion ◽  
Insight Into ◽  
Conversion Electrode

Fe3O4 is a promising conversion electrode material for Li ion batteries with high specific capacity. However, it suffers from capacity fading with cycling which inhibits the performance of these electrodes....

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