Highly ordered nanoscale phosphomolybdate-grafted polyaniline/metal hybrid layered structures prepared via secondary sputtering phenomenon as high-performance pseudocapacitor electrodes

High Aspect Ratio ◽

High Performance ◽

Electrode Materials ◽

Rate Capability ◽

High Rate ◽

Large Area

Abstract The development of energy storage electrode materials is important for enhancing the electrochemical performance of supercapacitors. Despite extensive research on improving electrochemical performance with polymer-based materials, electrode materials with micro/nanostructures are needed for fast and efficient ion and electron transfer. In this work, highly ordered phosphomolybdate (PMoO)-grafted polyaniline (PMoO-PAI) deposited onto Au hole-cylinder nanopillar arrays is developed for high-performance pseudocapacitors. The three-dimensional nanostructured arrays are easily fabricated by secondary sputtering lithography, which has recently gained attention and features a high resolution of 10 nm, a high aspect ratio greater than 20, excellent uniformity/accuracy/precision, and compatibility with large area substrates. These 10nm scale Au nanostructures with a high aspect ratio of ~30 on Au substrates facilitate efficient ion and electron transfer. The resultant PMoO-PAI electrode exhibits outstanding electrochemical performance, including a high specific capacitance of 114 mF/cm2, a high-rate capability of 88%, and excellent long-term stability.

Accelerating ion diffusion with unique three-dimensionally interconnected nanopores for self-membrane high-performance pseudocapacitors

Nanoscale ◽

10.1039/c7nr06234f ◽

2017 ◽

Vol 9 (46) ◽

pp. 18311-18317 ◽

Cited By ~ 5

Author(s):

Yuan Gao ◽

Yuanjing Lin ◽

Zehua Peng ◽

Qingfeng Zhou ◽

Zhiyong Fan

Keyword(s):

Aspect Ratio ◽

Surface Area ◽

Structural Stability ◽

High Aspect Ratio ◽

High Performance ◽

Three Dimensional ◽

Rate Capability ◽

Large Surface Area ◽

Nanoporous Structure ◽

Ion Diffusion

Three-dimensional interconnected nanoporous structure (3-D INPOS) possesses high aspect ratio, large surface area, as well as good structural stability. Profiting from its unique interconnected architecture, the 3-D INPOS pseudocapacitor achieves a largely enhanced capacitance and rate capability.

Boosting High-Rate Zinc-Storage Performance by the Rational Design of Mn2O3 Nanoporous Architecture Cathode

Nano-Micro Letters ◽

10.1007/s40820-019-0351-4 ◽

2019 ◽

Vol 12 (1) ◽

Cited By ~ 9

Author(s):

Danyang Feng ◽

Tu-Nan Gao ◽

Ling Zhang ◽

Bingkun Guo ◽

Shuyan Song ◽

...

Keyword(s):

High Performance ◽

Manganese Oxides ◽

Rational Design ◽

Electrode Materials ◽

Specific Capacity ◽

Rate Capability ◽

High Rate ◽

Pore Sizes ◽

Storage Performance ◽

Zinc Storage

AbstractManganese oxides are regarded as one of the most promising cathode materials in rechargeable aqueous Zn-ion batteries (ZIBs) because of the low price and high security. However, the practical application of Mn2O3 in ZIBs is still plagued by the low specific capacity and poor rate capability. Herein, highly crystalline Mn2O3 materials with interconnected mesostructures and controllable pore sizes are obtained via a ligand-assisted self-assembly process and used as high-performance electrode materials for reversible aqueous ZIBs. The coordination degree between Mn2+ and citric acid ligand plays a crucial role in the formation of the mesostructure, and the pore sizes can be easily tuned from 3.2 to 7.3 nm. Ascribed to the unique feature of nanoporous architectures, excellent zinc-storage performance can be achieved in ZIBs during charge/discharge processes. The Mn2O3 electrode exhibits high reversible capacity (233 mAh g−1 at 0.3 A g−1), superior rate capability (162 mAh g−1 retains at 3.08 A g−1) and remarkable cycling durability over 3000 cycles at a high current rate of 3.08 A g−1. Moreover, the corresponding electrode reaction mechanism is studied in depth according to a series of analytical methods. These results suggest that rational design of the nanoporous architecture for electrode materials can effectively improve the battery performance. "Image missing"

Rational Design of Co3O4 Nano-Flowers for High Performance Supercapacitors

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2020.2749 ◽

2020 ◽

Vol 15 (1) ◽

pp. 147-153

Author(s):

Yucai Li ◽

Yan Zhao ◽

Dong Zhang ◽

Shiwei Song ◽

Jian Wang ◽

...

Keyword(s):

High Performance ◽

Rational Design ◽

Electrode Materials ◽

High Energy ◽

High Energy Density ◽

Storage Device ◽

Facile Hydrothermal Method ◽

Promising Application

Electrochemical performance of the electrode materials is seriously dependent on the structure and morphology of the electrode material. In this work, the nanoflower-like Co3O4 samples are successfully prepared on Ni foam via a facile hydrothermal method. The as-fabricated Co3O4 samples exhibit superior electrochemical performance with a high specific capacitance of 382.6 C g-1 at 1 A g-1 and excellent capacitance retention. In addition, the as-fabricated device presents a high energy density of 23.6 Wh kg-1 at a power density of 508.6 W kg-1 and excellent cycle stability with a capacitance retention of 81.2% after 10000 cycles, indicating a promising application as electrodes for energy storage device.

Homogeneous Growth of Ni(OH)2 Nanoparticle on Carbon Nanotubes for High-Performance Supercapacitor Electrode Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.727.732 ◽

2017 ◽

Vol 727 ◽

pp. 732-737 ◽

Cited By ~ 1

Author(s):

Fei Fei Sun ◽

Dong Lin Zhao ◽

Cheng Li ◽

Xia Jun Wang ◽

Ji Xiang Chen ◽

...

Keyword(s):

Carbon Nanotubes ◽

High Performance ◽

Electrochemical Impedance ◽

Rate Capability ◽

Chemical Precipitation ◽

Supercapacitor Electrode ◽

Supercapacitive Performance ◽

A Current

A homogeneous Ni (OH)2/ carbon nanotubes (CNTs) nanocomposite with excellent supercapacitive performance has been synthesized via a facile chemical precipitation. The microstructure and morphology of Ni (OH)2/CNTs nanocomposite were investigated by XRD, SEM and TEM. It presented an ideal morphology with the nanosized Ni (OH)2 particles homogeneously growing on the CNTs. The electrochemical performance of the Ni (OH)2/CNTs nanocomposite was test by cyclic voltammetry, galvanostatic charge−discharge and electrochemical impedance spectroscopy techniques. The synthesized Ni (OH)2/CNTs nanocomposite shows superior electrochemical performance, including high capacitance, excellent rate capability and good cycle life. The homogeneous Ni (OH)2/ CNTs nanocomposite exhibited a high specific capacitance of 1741 F g-1 at a current density of 1A g-1 and maintained a good stability after 5000 cycles at 10A g-1`, suggesting that it can be a promising candidate for supercapacitor.

Facile Synthesis of TiO2 Microspheres with Super High Rate Performance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.1198 ◽

2012 ◽

Vol 573-574 ◽

pp. 1198-1202

Author(s):

You Rong Wang ◽

Peng Chen ◽

Xian Wang Zhang ◽

Jia Wang ◽

Si Qing Cheng

Keyword(s):

High Performance ◽

Electrode Materials ◽

Rate Capability ◽

High Rate ◽

X Ray Diffraction ◽

Rechargeable Lithium Batteries ◽

Electrochemical Tests ◽

High Storage Capacity ◽

Tio2 Microspheres ◽

High Rate Performance

The development of new electrode materials with high storage capacity is indispensable for improving rechargeable lithium batteries. Herein, high performance TiO2 microspheres have been fabricated by a facile solvothermal method. The obtained TiO2 microspheres were investigated by the measurements of X-ray diffraction pattern, scanning electronic microscopy, and electrochemical tests. As the rates increase from 1C to 20C, the TiO2 composites display high discharge capacities of 414.6 mAh g-1 for the ﬁrst cycle at 1 C and 244.6 mAh g-1 at 20 C over 100 cycles. CV experiments indicate that there are two peculiar pairs of cathodic/anodic peaks occurred in the range of 1.0-3.0V, which clearly demonstrates that the structure of the TiO2 microspheres here is quite different from the ordinary anatase TiO2. Excellent rate capability and cycle ability are ascribed presumablely to the unique structure.

Effect of Reaction Time on the Performance of Co3O4 Electrode Materials for High Performance Supercapacitors

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2020.2883 ◽

2020 ◽

Vol 15 (12) ◽

pp. 1429-1435

Author(s):

Yan Zhao ◽

Yucai Li ◽

Dong Zhang ◽

Shiwei Song ◽

Jian Wang ◽

...

Keyword(s):

Reaction Time ◽

Current Density ◽

High Performance ◽

Electrode Materials ◽

Structural Characteristics ◽

High Porosity ◽

Excellent Electrochemical Performance ◽

Hydrothermal Approach

Electrochemical performance of the material depends on the morphology and structural characteristics of the material. Co3O4 samples shows the remarkable electrochemical performance owing to the high porosity, appropriate pore size distribution and novel architecture and reaction time effect of morphology. In this work, Co3O4 nanowires grown on Ni foam have been synthesized through a facile hydrothermal approach, revealing large capacitance of 2178.4 mF cm-2 at the current density of 2 mA cm-2 and cycling stability with 79.6% capacitance retention after 6000 cycles. The as-assembled device delivers excellent electrochemical performance for high specific capacitance of 356 mF cm-2 at the current density of 2 mA cm-2 and high cycle stability.

Homogeneous Growth of Ni(OH)2 Nanoparticle on Graphene Nanosheet for High-Performance Supercapacitor Electrode Material

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.921 ◽

2016 ◽

Vol 852 ◽

pp. 921-927 ◽

Cited By ~ 1

Author(s):

Huan Lin ◽

Dong Lin Zhao ◽

Ran Ran Yao ◽

Zhao Hui Qiang ◽

Wan Xin Zhang ◽

...

Keyword(s):

Specific Capacitance ◽

High Performance ◽

Electrochemical Impedance ◽

Rate Capability ◽

Chemical Precipitation ◽

High Energy ◽

High Rate ◽

Supercapacitor Electrode ◽

Graphene Nanosheet

A homogeneous Ni (OH)2/graphene nanosheet (GNS) nanocomposite with excellent supercapacitive performance has been synthesized by a facile chemical precipitation. The Ni (OH)2/GNS nanocomposite presented an ideal morphology with the nanosized Ni (OH)2 particles homogeneously growing on the GNS. Its microstructure, morphology were investigated by XRD, SEM and TEM. The electrochemical performance of the Ni (OH)2/GNS nanocomposite was test by cyclic voltammetry, galvanostatic charge−discharge and electrochemical impedance spectroscopy techniques. The homogeneous Ni (OH)2/GNS nanocomposite exhibited a high specific capacitance of 1667 F/g at a current density of 1A/g and maintained a good stability in 5000 cycles, suggesting that it can be a promising candidate for supercapacitor. The high specific capacitance and remarkable rate capability are promising for applications in supercapacitors with both high energy and power densities. The Ni (OH)2/GNS nanocomposite exhibited large specific capacitance, high rate capability and good cycling stability.

The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors

Materials ◽

10.3390/ma13214870 ◽

2020 ◽

Vol 13 (21) ◽

pp. 4870

Author(s):

Xiao Li ◽

Jun Li ◽

Ying Zhang ◽

Peng Zhao ◽

Ruyan Lei ◽

...

Keyword(s):

Electrode Material ◽

High Performance ◽

Rate Capability ◽

High Energy ◽

High Specific Surface Area ◽

High Energy Density ◽

Initial Value ◽

Very High

Ni(OH)2 derived from an MOF template was synthesized as an electrode material for supercapacitors. The electrochemical performance of the electrode was adjusted by effectively regulating the morphology of Ni(OH)2. The evolution of electrochemical performance of the electrode with morphology of Ni(OH)2 was highlighted in detail, based on which honeycomb-like Ni(OH)2 was successfully synthesized, and endowed the electrode with outstanding electrochemical performance. For the three-electrode testing system, honeycomb-like Ni(OH)2 exhibited a very high specific capacitance (1865 F·g−1 at 1 A·g−1, 1550 F·g−1 at 5 mV·s−1). Moreover, it also presented an excellent rate capability and cycling stability, due to 59.46 % of the initial value (1 A·g−1) being retained at 10 A·g−1, and 172% of initial value (first circle at 50 mV·s−1) being retained after 20,000 cycles. With respect to the assembled hybrid supercapacitor, honeycomb-like Ni(OH)2 also displayed superior electrochemical performance, with a high energy density (83.9 Wh·kg−1 at a power density of 374.8 W·kg−1). The outstanding electrochemical performance of Ni(OH)2 should be attributed to its unique honeycomb-like structure, with a very high specific surface area, which greatly accelerates the transformation and diffusion of active ions.

Facile synthesis of core–shell nanostructured hollow carbon nanospheres@nickel cobalt double hydroxides as high-performance electrode materials for supercapacitors

Dalton Transactions ◽

10.1039/c6dt04759a ◽

2017 ◽

Vol 46 (10) ◽

pp. 3276-3283 ◽

Cited By ~ 40

Author(s):

Juan Xu ◽

Chaojie Ma ◽

Jianyu Cao ◽

Zhidong Chen

Keyword(s):

High Performance ◽

Electrode Materials ◽

Rate Capability ◽

Core Shell ◽

Carbon Nanospheres ◽

Facile Hydrothermal Method ◽

Nickel Cobalt ◽

Hollow Carbon ◽

Double Hydroxides

Novel core–shell nanostructured hollow carbon nanospheres@nickel cobalt double hydroxides (HCNs@NiCo-LDH) were fabricated by a facile hydrothermal method, exhibiting a high specific capacitance (2558 F g−1 at 1 A g−1) and outstanding rate capability.

Boosting Fast and Stable Potassium-ion Storage by Synergistic Interlayer and Pore-structure Engineering

10.26434/chemrxiv.12386126 ◽

2020 ◽

Author(s):

Deping Li ◽

Qing Sun ◽

Yamin Zhang ◽

Xinyue Dai ◽

Fengjun Ji ◽

...

Keyword(s):

Porous Carbon ◽

High Performance ◽

Electrode Materials ◽

Rate Capability ◽

Potassium Ion ◽

High Rate ◽

Ex Situ ◽

Metallic Ions ◽

Energy Storage Devices ◽

Ion Storage

Carbon-based material has been regarded as one of the most promising electrode materials for Potassium-ion batteries (PIBs). However, the battery performance based on reported porous carbon electrodes is still unsatisfactory, while the in-depth K-ion storage mechanism remains relatively ambiguous. Herein, we propose a facile “in situ template bubbling” method for synthesizing interlayer tuned hierarchically porous carbon with different metallic ions, which delivers superior K-ion storage performance, especially the rate capability (158.6 mAh g-1@10.0 A g-1) and high-rate cycling stability (82.8% capacity retention after 2000 cycles at 5.0 A g-1). The origin of the excellent rate performance is revealed by the deliberately designed consecutive CV measurements, Ex situ Raman tests, GITT and theoretical simulations. Considering the facile preparation strategy, superior electrochemical performance and insightful mechanism investigations, this work can provide fundamental understandings for high performance PIBs and related energy storage devices like sodium-ion batteries, aluminum-ion batteries, electrochemical capacitors and dual-ion batteries.