scholarly journals Lavender-like cobalt hydroxide nanoflakes deposited on nickel nanowire arrays for high-performance supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (31) ◽  
pp. 17263-17271 ◽  
Author(s):  
Jie Liao ◽  
Xuanyu Wang ◽  
Yang Wang ◽  
Songyang Su ◽  
Adeela Nairan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
High Performance ◽  
Nanowire Arrays ◽  
Cobalt Hydroxide ◽  
Flexible Supercapacitor ◽  
Nickel Nanowire ◽  
Storage Ability

Co(OH)2 nanoflakes deposited on nickel nanowire arrays with a lavender-like architecture are prepared. Using it as cathode and activated carbon as anode, the flexible supercapacitor shows superior energy storage ability.

Hierarchical nickel nanowire@NiCo2S4 nanowhisker composite arrays with a test-tube-brush-like structure for high-performance supercapacitors

2018 ◽  
Vol 6 (31) ◽  
pp. 15284-15293 ◽  
Author(s):  
Jie Liao ◽  
Peichao Zou ◽  
Songyang Su ◽  
Adeela Nairan ◽  
Yang Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Cathode Materials ◽  
High Performance ◽  
State Of The Art ◽  
Test Tube ◽  
Asymmetric Supercapacitor ◽  
Storage Performance ◽  
Array Electrode ◽  
Nickel Nanowire

An asymmetric supercapacitor consisting of a NiCo2S4 nanowhisker-array electrode and activated carbon shows state-of-the-art energy storage performance for NiCo2S4-based cathode materials at the device level.

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.

Porous Activity of Biomass-Activated Carbon Enhanced by Nitrogen-Dopant Towards High-Performance Lithium Ion Hybrid Battery-Supercapacitor

2021 ◽  
Author(s):  
Juan Yu ◽  
Xuyang Wang ◽  
Jiaxin Peng ◽  
Xuefeng Jia ◽  
Linbo Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Pore Structure ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Utilization Efficiency ◽  
Energy Storage Devices ◽  
Storage Devices

Abstract Biomass-activated carbon materials are promising electrode materials for lithium-ion hybrid capacitors (LiCs) because of their natural hierarchical pore structure. The efficient utilization of structural pores in activated carbon is very important for their electrochemical performance. Herein, porous biomass-activated carbon (PAC) with large specific surface area was prepared using a one-step activation method with biomass waste as the carbon source and ZnCl2 as the activator. To further improve its pore structure utilization efficiency, the PAC was doped with nitrogen using urea as the nitrogen source. The experimental results confirmed that PAC-1 with a high nitrogen doping level of 4.66% exhibited the most efficient pore utilization among all the samples investigated in this study. PAC-1 exhibited 92% capacity retention after 8000 cycles, showing good cycling stability. Then, to maximize the utilization of high-efficiency energy storage devices, LiNi0.8Co0.15Al0.05O2 (NCA), a promising cathode material for lithium-ion batteries with high specific capacity, was compounded with PAC-1 in different ratios to obtain NCA@PC composites. The NCA@PC-9 composite exhibited excellent capacitance in LiCs and an energy density of 210.9 Wh kg-1 at a high power density of 13.3 kW kg-1. These results provide guidelines for the design of high-performance and low-cost energy storage devices.

High-performance flexible supercapacitor electrodes based on Te nanowire arrays

2013 ◽  
Vol 1 (34) ◽  
pp. 10024 ◽  
Author(s):  
Jinli Cao ◽  
Muhammad Safdar ◽  
Zhenxing Wang ◽  
Jun He
Keyword(s):  
High Performance ◽  
Nanowire Arrays ◽  
Flexible Supercapacitor

One-pot growth of Co(OH)2 nanowire bundle arrays on in situ functionalized carbon cloth for robust flexible supercapacitor electrodes

2018 ◽  
Vol 47 (43) ◽  
pp. 15416-15423 ◽  
Author(s):  
Qiuyue Gui ◽  
Jian Jiang ◽  
Yuanyuan Li ◽  
Jinping Liu
Keyword(s):  
High Performance ◽  
Nanowire Arrays ◽  
Carbon Cloth ◽  
One Pot ◽  
Flexible Supercapacitor

One-pot growth of Co(OH)2 nanowire arrays on in situ functionalized carbon cloth is reported for high-performance bendable pseudocapacitive electrodes.

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