“Double guarantee mechanism” of Ca2+-intercalation and rGO-integration ensures hydrated vanadium oxide with high performance for aqueous zinc-ion batteries

2021 ◽  
Vol 8 (1) ◽  
pp. 79-89 ◽  
Author(s):  
Tao Hu ◽  
Ziyi Feng ◽  
Yifu Zhang ◽  
Yanyan Liu ◽  
Jingjing Sun ◽  
...  
Keyword(s):  
Energy Density ◽  
Vanadium Oxide ◽  
High Performance ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
Zinc Ion ◽  
Facile Hydrothermal Process

Ca2+-Intercalated hydrated V2O5/rGO (CaVOH/rGO) is synthesized via a facile hydrothermal process and applied as a cathode for ARZIBs with an admirable specific capacity (409 mA h g−1 at 0.05 A g−1) and excellent energy density (381 W h kg−1).

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...

Sulfurized Polyacrylonitrile for High-Performance Lithium Sulfur Batteries: Advances and Prospects

2021 ◽  
Author(s):  
Xiaohui Zhao ◽  
Chonglong Wang ◽  
Ziwei Li ◽  
Xuechun Hu ◽  
Amir A. Razzaq ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Specific Capacity ◽  
Rechargeable Batteries ◽  
Next Generation ◽  
Lithium Sulfur Batteries ◽  
Theoretical Specific Capacity ◽  
Lithium Sulfur

The lithium sulfur (Li-S) batteries have a high theoretical specific capacity (1675 mAh g-1) and energy density (2600 Wh kg-1), exerting a high perspective as the next-generation rechargeable batteries for...

Mixed-Valent Vanadium Oxide Cathode with Ultrahigh Rate Capability for Aqueous Zinc-Ion Battery

2021 ◽  
Author(s):  
Shenglong Li ◽  
Xiujuan Wei ◽  
Haopeng Chen ◽  
Guoyong Lai ◽  
Xuanpeng Wang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Vanadium Oxide ◽  
High Performance ◽  
Rate Capability ◽  
Zinc Ion ◽  
Commercial Application ◽  
Oxide Cathode

The development of high-performance cathode material is the key to realize commercial application of zinc-ion batteries (ZIBs). Vanadium-based materials have been used as cathode candidate for ZIBs due to their...

scholarly journals Hierarchical Carbon Microtube@Nanotube Core–Shell Structure for High-Performance Oxygen Electrocatalysis and Zn–Air Battery

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenfu Xie ◽  
Jianming Li ◽  
Yuke Song ◽  
Shijin Li ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Mass ◽  
Core Shell ◽  
High Power Density ◽  
Mass Loading

AbstractZinc–air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core–shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air–cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm−2), specific capacity (781.7 mAhg Zn −1 ) as well as long cycle stability (117 h, 351 cycles). Moreover, the ZAB performance of CMT@CNT is maintained well even under high mass loading (3 mg cm−2, three times as much as traditional usage), which could afford high power density and energy density for advanced electronic equipment. We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries.

scholarly journals Disodium citrate-assisted hydrothermal synthesis of V2O5 nanowires for high performance supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 3213-3217 ◽  
Author(s):  
Shanshan Pan ◽  
Ling Chen ◽  
Yahao Li ◽  
Shuolin Han ◽  
Lin Wang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Vanadium Pentoxide ◽  
High Performance ◽  
Hydrothermal Process ◽  
Facile Hydrothermal Process

Orthorhombic vanadium pentoxide (V2O5) nanowires with uniform morphology were successfully fabricated via a facile hydrothermal process.

Facile synthesis of Ni0.85Se on Ni foam for high-performance asymmetric capacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81474-81481 ◽  
Author(s):  
Chao Gong ◽  
Miaoliang Huang ◽  
Jinfang Zhang ◽  
Min Lai ◽  
Leqing Fan ◽  
...  
Keyword(s):  
High Performance ◽  
Hydrothermal Process ◽  
Ni Foam ◽  
Facile Synthesis ◽  
Facile Hydrothermal Process ◽  
Asymmetric Capacitors

Ni0.85Se was in situ grown on Ni foam via a facile hydrothermal process as a high-performance electrode for supercapacitors.

scholarly journals Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1033 ◽  
Author(s):  
Jia Yi Dong ◽  
Jin Cheng Xu ◽  
Kwun Nam Hui ◽  
Ye Yang ◽  
Shi Chen Su ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
High Performance ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
Active Surface ◽  
Nanowire Arrays ◽  
Electrochemical Performances ◽  
Nickel Substrate ◽  
Surface Areas

Here, we report the extraordinary electrochemical energy storage capability of NiMoO4@NiMoO4 homogeneous hierarchical nanosheet-on-nanowire arrays (SOWAs), synthesized on nickel substrate by a two-stage hydrothermal process. Comparatively speaking, the SOWAs electrode displays superior electrochemical performances over the pure NiMoO4 nanowire arrays. Such improvements can be ascribed to the characteristic homogeneous hierarchical structure, which not only effectively increases the active surface areas for fast charge transfer, but also reduces the electrode resistance significantly by eliminating the potential barrier at the nanowire/nanosheet junction, an issue usually seen in other reported heterogeneous architectures. We further evaluate the performances of the SOWAs by constructing an asymmetric hybrid supercapacitor (ASC) with the SOWAs and activated carbon (AC). The optimized ASC shows excellent electrochemical performances with 47.2 Wh/kg in energy density of 1.38 kW/kg at 0–1.2 V. Moreover, the specific capacity retention can be as high as 91.4% after 4000 cycles, illustrating the remarkable cycling stability of the NiMoO4@NiMoO4//AC ASC device. Our results show that this unique NiMoO4@NiMoO4 SOWA has great prospects for future energy storage applications.

High-Performance Asymmetric Supercapacitors Based on the Ni1.5Co1.5S4@CNTs Nanocomposites

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050136
Author(s):  
Xuan Zheng ◽  
Xingxing He ◽  
Jinlong Jiang ◽  
Zhengfeng Jia ◽  
Yu Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Specific Capacity ◽  
Negative Electrode ◽  
High Energy ◽  
Cycling Stability ◽  
Power Delivery ◽  
High Energy Density ◽  
Practical Applications

In this paper, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs nanocomposites containing different carbon nanotubes (CNT) content were prepared by a one-step hydrothermal method. More hydroxyl and carboxyl groups were introduced on the surface of CNTs by acidizing treatment to increase the dispersion of CNTs. The acid-treated CNTs can more fully compound with Ni[Formula: see text]Co[Formula: see text]S4 nanoparticles to form heterostructure. When the CNTs content is 10[Formula: see text]wt.%, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite exhibits the highest specific capacity of 210[Formula: see text]mAh[Formula: see text]g[Formula: see text] in KOH aqueous electrolytes at current density of 1[Formula: see text]A[Formula: see text]g[Formula: see text]. The superior performances of the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite are attributed to the effective synergic effects of the high specific capacity of Ni[Formula: see text]Co[Formula: see text]S4 and the excellent conductivity of CNTs. An asymmetric supercapacitor (ASC) was assembled based on Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 positive electrode and activated carbon (AC) negative electrode, which delivers a high energy density of 61.2[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 800[Formula: see text]W[Formula: see text]kg[Formula: see text], and maintains 34.8[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 16079[Formula: see text]W[Formula: see text]kg[Formula: see text]. Also, the ASC device shows an excellent cycling stability with 91.49% capacity retention and above 94% Columbic efficiency after 10 000 cycles at 10[Formula: see text]A[Formula: see text]g[Formula: see text]. This aqueous asymmetric Ni[Formula: see text]Co[Formula: see text]S4@CNTs//AC supercapacitor is promising for practical applications due to its advantages such as high energy density, power delivery and cycling stability.

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