Scalable fabrication of MnO2 nanostructure deposited on free-standing Ni nanocone arrays for ultrathin, flexible, high-performance micro-supercapacitor

2014 ◽  
Vol 7 (8) ◽  
pp. 2652-2659 ◽  
Author(s):  
Zijin Su ◽  
Cheng Yang ◽  
Binghe Xie ◽  
Ziyin Lin ◽  
Zhexu Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Deposition Process ◽  
Superior Performance ◽  
Free Standing ◽  
Electro Deposition ◽  
Mno2 Nanostructure

A thin film of Ni nanocone arrays loaded with MnO2 nanostructures is prepared by an electro-deposition process and peeled off from the carrier substrate. This electrode shows superior performance for micro-supercapacitors.

scholarly journals Atomic Modulation of 3D Conductive Frameworks Boost Performance of MnO2 for Coaxial Fiber-Shaped Supercapacitors

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaona Wang ◽  
Zhenyu Zhou ◽  
Zhijian Sun ◽  
Jinho Hah ◽  
Yagang Yao ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Superior Performance ◽  
High Mass ◽  
Mass Loading ◽  
Energy Storage Devices ◽  
Free Standing ◽  
Cell Potential

Abstract Coaxial fiber-shaped supercapacitors are a promising class of energy storage devices requiring high performance for flexible and miniature electronic devices. Yet, they are still struggling from inferior energy density, which comes from the limited choices in materials and structure used. Here, Zn-doped CuO nanowires were designed as 3D framework for aligned distributing high mass loading of MnO2 nanosheets. Zn could be introduced into the CuO crystal lattice to tune the covalency character and thus improve charge transport. The Zn–CuO@MnO2 as positive electrode obtained superior performance without sacrificing its areal and gravimetric capacitances with the increasing of mass loading of MnO2 due to 3D Zn–CuO framework enabling efficient electron transport. A novel category of free-standing asymmetric coaxial fiber-shaped supercapacitor based on Zn0.11CuO@MnO2 core electrode possesses superior specific capacitance and enhanced cell potential window. This asymmetric coaxial structure provides superior performance including higher capacity and better stability under deformation because of sufficient contact between the electrodes and electrolyte. Based on these advantages, the as-prepared asymmetric coaxial fiber-shaped supercapacitor exhibits a high specific capacitance of 296.6 mF cm−2 and energy density of 133.47 μWh cm−2. In addition, its capacitance retention reaches 76.57% after bending 10,000 times, which demonstrates as-prepared device’s excellent flexibility and long-term cycling stability.

Free-standing monolithic nanoporous graphene foam as a high performance aluminum-ion battery cathode

2017 ◽  
Vol 5 (36) ◽  
pp. 19416-19421 ◽  
Author(s):  
Xiaodan Huang ◽  
Yang Liu ◽  
Hongwei Zhang ◽  
Jun Zhang ◽  
Owen Noonan ◽  
...  
Keyword(s):  
High Performance ◽  
Superior Performance ◽  
Free Standing ◽  
Graphene Foam ◽  
Aluminum Ion ◽  
Coin Cell ◽  
Cell Configuration ◽  
Nanoporous Graphene

Aluminum-ion batteries with a new monolithic nanoporous graphene cathode and a novel coin-cell configuration have been developed and delivered superior performance.

A simple one-step solution deposition process for constructing high-performance amorphous zirconium oxide thin film

RSC Advances ◽  
2014 ◽  
Vol 4 (12) ◽  
pp. 6060 ◽  
Author(s):  
Yongjuan Mi ◽  
Jinqing Wang ◽  
Zhigang Yang ◽  
Zhaofeng Wang ◽  
Honggang Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Zirconium Oxide ◽  
High Performance ◽  
Deposition Process ◽  
Oxide Thin Film ◽  
Solution Deposition ◽  
One Step

scholarly journals Cut-Price Fabrication of Free-standing Porous Carbon Nanofibers Film Electrode for Lithium-ion Batteries

2019 ◽  
Vol 9 (5) ◽  
pp. 1016 ◽  
Author(s):  
Pengfei Zhao ◽  
Wei Li ◽  
Shiqing Fang ◽  
Ji Yu ◽  
Zhenyu Yang ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Porous Carbon ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Low Cost ◽  
Lithium Ion ◽  
Free Standing ◽  
Conductive Additive ◽  
Porous Carbon Nanofiber

Freestanding thin film electrodes are competitive candidate materials for high-performance energy stockpile equipment due to their self-supporting structure and because they lack any polymer binder or conductive additive. In our work, a porous carbon nanofiber film (PCNF) electrode has been synthesized via a convenient and low-cost electrospinning approach and the following carbonization and air etching process. The obtained PCNF electrode sample shows a high reversible capacity (1138 mAh g−1 at 0.1 C), remarkable rate capacity (101.2 mAh g−1 at 15 C), and superior cycling stability with a lower capacity decay rate of ~0.013% each cycle upon 1000 cycles (278 mAh g−1 at 5 C). The prominent electrochemical performance of PCNF can be put down to the stable self-supporting conductive structure and the porous feature in each carbon nanofiber, which will significantly promote the transfer tempo of Li-ion and electron and relieve the large volume change during inserting lithium ion. More interestingly, this work exhibits a low-cost and primitive strategy to fabricate thin film anode for lithium-ion batteries.

Enzyme-triggered coatings of tea catechins/chitosan for nanofiltration membranes with high performance

2016 ◽  
Vol 18 (23) ◽  
pp. 6205-6208 ◽  
Author(s):  
Wen-Ze Qiu ◽  
Qi-Zhi Zhong ◽  
Yong Du ◽  
Yan Lv ◽  
Zhi-Kang Xu
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Deposition Process ◽  
Nanofiltration Membranes ◽  
Tea Catechins ◽  
Film Composite ◽  
Thin Film Composite

Skin layers have been fabricated via an enzyme-triggered co-deposition process of natural tea catechins and chitosan for thin film composite nanofiltration membranes with high performance.

Co-Optimization of Si Thin-Film Deposition and Excimer Laser Anneal Processes for Fabrication of High-Performance p-Si TFTs

1998 ◽  
Vol 508 ◽  
Author(s):  
A.T. Voutsas ◽  
A. Marmorstein ◽  
R. Solanki
Keyword(s):  
Thin Film ◽  
Excimer Laser ◽  
High Performance ◽  
Defect Density ◽  
Laser Energy ◽  
Thin Film Deposition ◽  
Deposition Process ◽  
Film Deposition ◽  
Process Window ◽  
Laser Crystallization

AbstractIn this work we have co-optimized the deposition and excimer laser crystallization processes for formation of high quality, low-temperature, p-Si films (LPS). We have found that the post-ELA polysilicon structure is very sensitive to deposition process adjustments, collectively expressed by the deposition rate. At low rates the PECVD Si-film is deposited in the microcrystalline phase (µc-Si). Comparing µc-Si and a-Si film precursors, we have shown that at equivalent annealing conditions (laser energy density) polysilicon films obtained from µc-Si precursor demonstrate improved crystallinity (grain size, defect density). Polysilicon thin film transistors (p-Si TFTs) have been fabricated and characterized using this material and compared to our standard process. We have found that the performance of µc-Si precursor exceeds by 20-50% that of a-Si precursor. Use of µc-Si precursor may also have important implications in reducing substrate damage during ELA process and for widening the ELA process window.

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