Hollandite-type Al-doped VO1.52(OH)0.77 as a zinc ion insertion host material

2017 ◽  
Vol 5 (18) ◽  
pp. 8367-8375 ◽  
Author(s):  
Jae Hyeon Jo ◽  
Yang-Kook Sun ◽  
Seung-Taek Myung
Keyword(s):  
Electrode Materials ◽  
Zinc Ion ◽  
Host Material ◽  
First Time ◽  
Ion Insertion

For the first time, we suggest VO1.52(OH)0.77 and Al-doped VO1.52(OH)0.77 as possible candidate electrode materials for aqueous zinc-ion batteries (ZIBs).

scholarly journals Electrolyte Concentration Regulation Boosting Zinc Storage Stability of High-Capacity K0.486V2O5 Cathode for Bendable Quasi-Solid-State Zinc Ion Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Linpo Li ◽  
Shuailei Liu ◽  
Wencong Liu ◽  
Deliang Ba ◽  
Wenyi Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Large Scale ◽  
Electrode Materials ◽  
Discharge Rate ◽  
High Capacity ◽  
Interlayer Spacing ◽  
Zinc Ion ◽  
Stability Issue ◽  
The Stability ◽  
First Time

AbstractVanadium-based cathodes have attracted great interest in aqueous zinc ion batteries (AZIBs) due to their large capacities, good rate performance and facile synthesis in large scale. However, their practical application is greatly hampered by vanadium dissolution issue in conventional dilute electrolytes. Herein, taking a new potassium vanadate K0.486V2O5 (KVO) cathode with large interlayer spacing (~ 0.95 nm) and high capacity as an example, we propose that the cycle life of vanadates can be greatly upgraded in AZIBs by regulating the concentration of ZnCl2 electrolyte, but with no need to approach “water-in-salt” threshold. With the optimized moderate concentration of 15 m ZnCl2 electrolyte, the KVO exhibits the best cycling stability with ~ 95.02% capacity retention after 1400 cycles. We further design a novel sodium carboxymethyl cellulose (CMC)-moderate concentration ZnCl2 gel electrolyte with high ionic conductivity of 10.08 mS cm−1 for the first time and assemble a quasi-solid-state AZIB. This device is bendable with remarkable energy density (268.2 Wh kg−1), excellent stability (97.35% after 2800 cycles), low self-discharge rate, and good environmental (temperature, pressure) suitability, and is capable of powering small electronics. The device also exhibits good electrochemical performance with high KVO mass loading (5 and 10 mg cm−2). Our work sheds light on the feasibility of using moderately concentrated electrolyte to address the stability issue of aqueous soluble electrode materials.

Self-assembly synthesis of nitrogen-doped mesoporous carbons used as high-performance electrode materials in lithium-ion batteries and supercapacitors

2017 ◽  
Vol 41 (21) ◽  
pp. 12901-12909 ◽  
Author(s):  
Chunfeng Shao ◽  
Ziqiang Wang ◽  
Errui Wang ◽  
Shujun Qiu ◽  
Hailiang Chu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Self Assembly ◽  
High Performance ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Mesoporous Carbons ◽  
Nitrogen Doped ◽  
First Time ◽  
Enhanced Electrochemical Performance

Guanine was, for the first time, used as a nitrogen source during the synthesis of nitrogen-doped porous carbons (NMCs) with enhanced electrochemical performance.

scholarly journals Easy approach to synthesize N/P/K co-doped porous carbon microfibers from cane molasses as a high performance supercapacitor electrode material

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 34739-34750 ◽  
Author(s):  
Alfin Kurniawan ◽  
L. K. Ong ◽  
Fredi Kurniawan ◽  
C. X. Lin ◽  
Felycia E. Soetaredjo ◽  
...  
Keyword(s):  
Electrode Material ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Cane Molasses ◽  
Electrochemical Application ◽  
Carbon Microfibers ◽  
First Time ◽  
Co Doped

For the first time, porous carbon microfibers co-doped with N/P/K were synthesized from cane molasses by combination of electrospinning and carbonization techniques and its electrochemical application to electrode materials for supercapacitors was investigated.

A flexible solid-state zinc ion hybrid supercapacitor based on co-polymer derived hollow carbon spheres

2019 ◽  
Vol 7 (13) ◽  
pp. 7784-7790 ◽  
Author(s):  
Shengmei Chen ◽  
Longtao Ma ◽  
Kui Zhang ◽  
M. Kamruzzaman ◽  
Chunyi Zhi ◽  
...  
Keyword(s):  
Solid State ◽  
Zinc Ion ◽  
Carbon Spheres ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Hollow Carbon ◽  
First Time ◽  
Hollow Carbon Spheres

For the first time solid-state zinc ion hybrid supercapacitors based on co-polymer derived hollow carbon spheres with good flexibility have been developed.

Layered vanadium oxides with proton and zinc ion insertion for zinc ion batteries

2019 ◽  
Vol 320 ◽  
pp. 134565 ◽  
Author(s):  
Wenbao Liu ◽  
Liubing Dong ◽  
Baozheng Jiang ◽  
Yongfeng Huang ◽  
Xianli Wang ◽  
...  
Keyword(s):  
Zinc Ion ◽  
Vanadium Oxides ◽  
Ion Insertion

scholarly journals Nanorod-assembled NiCo2O4 hollow microspheres assisted by an ionic liquid as advanced electrode materials for supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 11123-11128 ◽  
Author(s):  
Yirong Zhu ◽  
Xiaobo Ji ◽  
Ruiming Yin ◽  
Zhongliang Hu ◽  
Xiaoqing Qiu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Hydrothermal Method ◽  
Electrode Materials ◽  
Hollow Microspheres ◽  
First Time

In this work, nanorod-assembled NiCo2O4 hollow microspheres have been successfully prepared by an ionic liquid-assisted hydrothermal method for the first time.

A functional and structural study of the major metalloprotease secreted by the pathogenic fungusAspergillus fumigatus

2013 ◽  
Vol 69 (10) ◽  
pp. 1946-1957 ◽  
Author(s):  
Daniel Fernández ◽  
Silvia Russi ◽  
Josep Vendrell ◽  
Michel Monod ◽  
Irantzu Pallarès
Keyword(s):  
Catalytic Domain ◽  
Sequence Similarity ◽  
Pathogenic Fungi ◽  
Disulfide Bridge ◽  
Zinc Ion ◽  
Binary Complex ◽  
Active Site Cleft ◽  
Charged Amino Acid Residue ◽  
Polypeptide Chains ◽  
First Time

Fungalysins are secreted fungal peptidases with the ability to degrade the extracellular matrix proteins elastin and collagen and are thought to act as virulence factors in diseases caused by fungi. Fungalysins constitute a unique family among zinc-dependent peptidases that bears low sequence similarity to known bacterial peptidases of the thermolysin family. The crystal structure of the archetype of the fungalysin family,Aspergillus fumigatusmetalloprotease (AfuMep), has been obtained for the first time. The 1.8 Å resolution structure of AfuMep corresponds to that of an autoproteolyzed proenzyme with separate polypeptide chains corresponding to the N-terminal prodomain in a binary complex with the C-terminal zinc-bound catalytic domain. The prodomain consists of a tandem of cystatin-like folds whose C-terminal end is buried into the active-site cleft of the catalytic domain. The catalytic domain harbouring the key catalytic zinc ion and its ligands, two histidines and one glutamic acid, undergoes a conspicuous rearrangement of its N-terminal end during maturation. One key positively charged amino-acid residue and the C-terminal disulfide bridge appear to contribute to its structural–functional properties. Thus, structural, biophysical and biochemical analysis were combined to provide a deeper comprehension of the underlying properties ofA. fumigatusfungalysin, serving as a framework for the as yet poorly known metallopeptidases from pathogenic fungi.

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