Fe-doped Co3O4 polycrystalline nanosheets as a binder-free bifunctional cathode for robust and efficient zinc–air batteries

2020 ◽  
Vol 56 (40) ◽  
pp. 5374-5377 ◽  
Author(s):  
Xiao-Zhi Liu ◽  
Tang Tang ◽  
Wen-Jie Jiang ◽  
Qing-Hua Zhang ◽  
Lin Gu ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
Cycling Stability ◽  
Bifunctional Electrocatalysts ◽  
Binder Free ◽  
Superior Cycling Stability ◽  
Zinc Air Batteries

Self-standing Fe-Co3O4@CC bifunctional electrocatalysts enabled high-performance Zn–air batteries with a power density of 268.6 mW cm−2 and superior cycling stability.

Robust wrinkled MoS2/N-C bifunctional electrocatalysts interfaced with single Fe atoms for wearable zinc-air batteries

2021 ◽  
Vol 118 (40) ◽  
pp. e2110036118
Author(s):  
Yan Yan ◽  
Shuang Liang ◽  
Xiang Wang ◽  
Mingyue Zhang ◽  
Shu-Meng Hao ◽  
...  
Keyword(s):  
High Performance ◽  
Density Functional ◽  
High Capacity ◽  
Density Functional Theory Calculations ◽  
Catalytic Performance ◽  
Cycling Stability ◽  
Single Atom ◽  
Core Shell ◽  
Bifunctional Electrocatalysts ◽  
Zinc Air Batteries

The ability to create highly efficient and stable bifunctional electrocatalysts, capable of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the same electrolyte, represents an important endeavor toward high-performance zinc-air batteries (ZABs). Herein, we report a facile strategy for crafting wrinkled MoS2/N-doped carbon core/shell nanospheres interfaced with single Fe atoms (denoted MoS2@Fe-N-C) as superior ORR/OER bifunctional electrocatalysts for robust wearable ZABs with a high capacity and outstanding cycling stability. Specifically, the highly crumpled MoS2 nanosphere core is wrapped with a layer of single-Fe-atom-impregnated, N-doped carbon shell (i.e., Fe-N-C shell with well-dispersed FeN4 sites). Intriguingly, MoS2@Fe-N-C nanospheres manifest an ORR half-wave potential of 0.84 V and an OER overpotential of 360 mV at 10 mA⋅cm−2. More importantly, density functional theory calculations reveal the lowered energy barriers for both ORR and OER, accounting for marked enhanced catalytic performance of MoS2@Fe-N-C nanospheres. Remarkably, wearable ZABs assembled by capitalizing on MoS2@Fe-N-C nanospheres as an air electrode with an ultralow area loading (i.e., 0.25 mg⋅cm−2) display excellent stability against deformation, high special capacity (i.e., 442 mAh⋅g−1Zn), excellent power density (i.e., 78 mW⋅cm−2) and attractive cycling stability (e.g., 50 cycles at current density of 5 mA⋅cm−2). This study provides a platform to rationally design single-atom-interfaced core/shell bifunctional electrocatalysts for efficient metal-air batteries.

Edge-Segregated Ternary Pd-Pt-Ni Spiral Nanosheets as High-Performance Bifunctional Oxygen Redox Electrocatalysts for Rechargeable Zinc−Air Batteries

2022 ◽  
Author(s):  
Kai Liu ◽  
Hongpu Huang ◽  
Yuxin Zhu ◽  
Zixi Lyu ◽  
Shupeng Wang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
High Performance ◽  
Rational Design ◽  
Bifunctional Electrocatalysts ◽  
Working Efficiency ◽  
Zinc Air Batteries

Rational design of high-perfomance bifunctional electrocatalysts to simultaneously accelerate the sluggish reversible oxygen reduction and evolution reactions (ORR and OER) is an enormous challenge that restricts the working efficiency and...

A novel calendula-like MnNb2O6 anchored on graphene sheet as high-performance intercalation pseudocapacitive anode for lithium-ion capacitors

2019 ◽  
Vol 7 (6) ◽  
pp. 2855-2863 ◽  
Author(s):  
Xu Zhang ◽  
Jinyu Zhang ◽  
Shuying Kong ◽  
Kai Zhu ◽  
Jun Yan ◽  
...  
Keyword(s):  
Graphene Sheet ◽  
Anode Material ◽  
High Performance ◽  
Storage Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Charge Storage ◽  
First Time ◽  
Superior Cycling Stability

In this paper, for the first time, we investigated MnNb2O6 as a new rate capability type anode material for lithium-ion capacitors (LICs), which exhibit excellent charge storage capacity and reasonably superior cycling stability.

A three-dimensional graphene framework-enabled high-performance stretchable asymmetric supercapacitor

2018 ◽  
Vol 6 (4) ◽  
pp. 1802-1808 ◽  
Author(s):  
Ke Li ◽  
Yanshan Huang ◽  
Jingjing Liu ◽  
Mansoor Sarfraz ◽  
Phillips O. Agboola ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Three Dimensional ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Superior Cycling Stability

Three-dimensional graphene frameworks enable the development of stretchable asymmetric supercapacitors with a record high energy density of 77.8 W h kg−1, and also excellent stretchability and superior cycling stability.

Continuous fabrication of a MnS/Co nanofibrous air electrode for wide integration of rechargeable zinc–air batteries

Nanoscale ◽  
2017 ◽  
Vol 9 (41) ◽  
pp. 15865-15872 ◽  
Author(s):  
Yang Wang ◽  
Jing Fu ◽  
Yining Zhang ◽  
Matthew Li ◽  
Fathy Mohamed Hassan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
High Performance ◽  
Air Electrode ◽  
Highly Efficient ◽  
Bifunctional Electrocatalysts ◽  
Continuous Fabrication ◽  
Zinc Air Batteries

Exploring highly efficient bifunctional electrocatalysts toward the oxygen reduction and evolution reactions is essential for the realization of high-performance rechargeable zinc–air batteries.

Co3O4 nanoparticles decorated carbon nanofiber mat as binder-free air-cathode for high performance rechargeable zinc-air batteries

Nanoscale ◽  
2015 ◽  
Vol 7 (5) ◽  
pp. 1830-1838 ◽  
Author(s):  
Bing Li ◽  
Xiaoming Ge ◽  
F. W. Thomas Goh ◽  
T. S. Andy Hor ◽  
Dongsheng Geng ◽  
...  
Keyword(s):  
Energy Density ◽  
Carbon Nanofibers ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Rate Capability ◽  
Co3o4 Nanoparticles ◽  
Air Cathode ◽  
Free Air ◽  
Binder Free ◽  
Zinc Air Batteries

A facile method is developed for the fabrication of Co3O4 nanoparticles decorated carbon nanofibers, which enable significant improvement of rechargeable Zn-air batteries with respect to rate capability, cycling stability and energy density.

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.

Defective/Graphitic-Synergy in Heteroatom-interlinked-triggered Metal-free Electrocatalyst for High-performance Rechargeable Zinc-Air Batteries

2021 ◽  
Author(s):  
Ghulam Yasin ◽  
Sehrish Ibrahim ◽  
Shumaila Ibraheem ◽  
Sajjad Ali ◽  
Rashid Iqbal ◽  
...  
Keyword(s):  
Energy Storage ◽  
Oxygen Reduction ◽  
Power Density ◽  
High Performance ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Metal Free ◽  
Storage Technologies ◽  
Zinc Air Batteries

Motivated by the fortified demand for energy storage technologies with maximum power density and safety, zinc-air batteries have drawn extensive attention. However, developing a competent and robust bifunctional oxygen reduction...

Binder-free Fe2N nanoparticles on carbon textile with high power density as novel anode for high-performance flexible lithium ion batteries

Nano Energy ◽  
2015 ◽  
Vol 11 ◽  
pp. 348-355 ◽  
Author(s):  
Muhammad-Sadeeq Balogun ◽  
Minghao Yu ◽  
Yongchao Huang ◽  
Cheng Li ◽  
Pingping Fang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Lithium Ion ◽  
High Power Density ◽  
Binder Free

Hierarchical 3D Zn–Ni–P nanosheet arrays as an advanced electrode for high-performance all-solid-state asymmetric supercapacitors

2018 ◽  
Vol 6 (18) ◽  
pp. 8669-8681 ◽  
Author(s):  
Thanh Tuan Nguyen ◽  
Jayaraman Balamurugan ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Cycling Stability ◽  
Asymmetric Supercapacitors ◽  
Nanosheet Arrays

A hierarchical 3D Zn–Ni–P nanosheet arrays based all-solid-state ASC exhibits an excellent energy density of ∼90.12 W h kg−1 at 0.61 kW kg−1, power density of ∼8.77 kW kg−1 at 65.83 W h kg−1, and extraordinary cycling stability of ∼93.05% capacitance retention after 20 000 cycles.

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