Fabrication of N-doped carbon coated spinel copper cobalt sulfide hollow spheres to realize the improvement of electrochemical performance for supercapacitors

2019 ◽  
Vol 45 (17) ◽  
pp. 21286-21292 ◽  
Author(s):  
Zhongbing Wang ◽  
Zihao Zhu ◽  
Qingnan Zhang ◽  
Mengtao Zhai ◽  
Junfeng Gao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Hollow Spheres ◽  
Cobalt Sulfide ◽  
Carbon Coated

Facile fabrication of carbon-coated spinel nickel cobalt sulfide hollow sphere to achieve high-performance for supercapacitors

2021 ◽  
Author(s):  
Zhongbing Wang ◽  
Yonghao Hao ◽  
Wenjun Zhang ◽  
Jingyuan Fang ◽  
Chunnian Chen
Keyword(s):  
Electrochemical Properties ◽  
Hollow Sphere ◽  
High Performance ◽  
Hollow Spheres ◽  
Cobalt Sulfide ◽  
Simple Method ◽  
Nickel Cobalt ◽  
Carbon Coated ◽  
Facile Fabrication

This paper presents a simple method to prepare carbon-coated spinel nickel-cobalt sulfide metal hollow spheres with excellent electrochemical properties, which can be considered as promising materials for supercapacitors. A type...

scholarly journals Rapid mechanochemical synthesis of polyanionic cathode with improved electrochemical performance for Na-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xing Shen ◽  
Quan Zhou ◽  
Miao Han ◽  
Xingguo Qi ◽  
Bo Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Mechanochemical Synthesis ◽  
Cathode Materials ◽  
Industrial Application ◽  
Synthesis Process ◽  
In Situ Fabrication ◽  
Stationary Energy ◽  
Carbon Coated

AbstractNa-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g−1 at 0.1C, higher than its theoretical capacity (130 mAh g−1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.

scholarly journals Polyimide-Derived Carbon-Coated Li4Ti5O12 as High-Rate Anode Materials for Lithium Ion Batteries

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1672
Author(s):  
Shih-Chieh Hsu ◽  
Tzu-Ten Huang ◽  
Yen-Ju Wu ◽  
Cheng-Zhang Lu ◽  
Huei Chu Weng ◽  
...  
Keyword(s):  
Carbon Source ◽  
Electrochemical Performance ◽  
Anode Materials ◽  
Lithium Ion ◽  
High Rate ◽  
Rate Performance ◽  
Molecular Arrangement ◽  
Thermal Imidization ◽  
Carbon Coated ◽  
Graphite Structure

Carbon-coated Li4Ti5O12 (LTO) has been prepared using polyimide (PI) as a carbon source via the thermal imidization of polyamic acid (PAA) followed by a carbonization process. In this study, the PI with different structures based on pyromellitic dianhydride (PMDA), 4,4′-oxydianiline (ODA), and p-phenylenediamine (p-PDA) moieties have been synthesized. The effect of the PI structure on the electrochemical performance of the carbon-coated LTO has been investigated. The results indicate that the molecular arrangement of PI can be improved when the rigid p-PDA units are introduced into the PI backbone. The carbons derived from the p-PDA-based PI show a more regular graphite structure with fewer defects and higher conductivity. As a result, the carbon-coated LTO exhibits a better rate performance with a discharge capacity of 137.5 mAh/g at 20 C, which is almost 1.5 times larger than that of bare LTO (94.4 mAh/g).

Carbon-coated lithium titanium phosphate nanoporous microplates with superior electrochemical performance

2015 ◽  
Vol 294 ◽  
pp. 650-657 ◽  
Author(s):  
Zhifeng Huang ◽  
Li Liu ◽  
Qian Zhou ◽  
Jinli Tan ◽  
Zichao Yan ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Titanium Phosphate ◽  
Carbon Coated ◽  
Lithium Titanium

Electrochemical performance and electronic properties of shell LiNi0.5Mn1.5O4 hollow spheres for lithium ion battery

2016 ◽  
Vol 09 (02) ◽  
pp. 1650027 ◽  
Author(s):  
Yongli Cui ◽  
Jiali Wang ◽  
Mingzhen Wang ◽  
Quanchao Zhuang
Keyword(s):  
Activation Energy ◽  
Electrochemical Performance ◽  
Electronic Properties ◽  
Lithium Ion Battery ◽  
Retention Rate ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Hollow Microspheres ◽  
Cycle Stability

Shell spinel LiNi[Formula: see text]Mn[Formula: see text]O4 hollow microspheres were successfully synthesized by MnCO3 template, and characterized by XRD, SEM, and TEM. The results show that the hollow LiNi[Formula: see text]Mn[Formula: see text]O4 cathode has good cycle stability to reach 124.5, 119.8, and 96.6[Formula: see text]mAh/g at 0.5, 1, and 5 C, the corresponding retention rate of 98.1%, 98.2%, and 98.0% after 50 cycles at 20[Formula: see text]C, and the reversible capacity of 94.6[Formula: see text]mAh/g can be obtained at 1 C rate at 55[Formula: see text]C, 83.3% retention after 100 cycles. As the temperature decreases from 10[Formula: see text]C to [Formula: see text]C, the resistance of [Formula: see text] increases from 5.5 [Formula: see text] to 135 [Formula: see text], [Formula: see text] from 27 [Formula: see text] to 353.2 [Formula: see text], and [Formula: see text] from 12.7 [Formula: see text] to 73.0 [Formula: see text]. Moreover, the B constant and [Formula: see text] activation energy are 4480[Formula: see text]K and 37.22[Formula: see text]KJ/mol for the NTC spinel material, respectively.

scholarly journals Multishelled NiO Hollow Spheres Decorated by Graphene Nanosheets as Anodes for Lithium-Ion Batteries with Improved Reversible Capacity and Cycling Stability

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Lihua Chu ◽  
Meicheng Li ◽  
Yu Wang ◽  
Xiaodan Li ◽  
Zipei Wan ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Graphene Nanosheets ◽  
Hollow Spheres ◽  
Modern Science ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Graphene Sheets ◽  
Reduced Graphene ◽  
Graphene Nanocomposite ◽  
A Current

Graphene-based nanocomposites attract many attentions because of holding promise for many applications. In this work, multishelled NiO hollow spheres decorated by graphene nanosheets nanocomposite are successfully fabricated. The multishelled NiO microspheres are uniformly distributed on the surface of graphene, which is helpful for preventing aggregation of as-reduced graphene sheets. Furthermore, the NiO/graphene nanocomposite shows much higher electrochemical performance with a reversible capacity of 261.5 mAh g−1at a current density of 200 mA g−1after 100 cycles tripled compared with that of pristine multishelled NiO hollow spheres, implying the potential application in modern science and technology.

Synthesis of urchin-like Ni3Si2O5(OH)4 hierarchical hollow spheres/GO composite with enhanced electrochemical properties for high-performance hybrid supercapacitors

2019 ◽  
Vol 48 (31) ◽  
pp. 11749-11762 ◽  
Author(s):  
Xueying Dong ◽  
Yifu Zhang ◽  
Qiushi Wang ◽  
Xiaorong Zhang ◽  
Meng Gao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Hollow Sphere ◽  
High Performance ◽  
Hollow Spheres ◽  
Capacity Retention ◽  
Hybrid Supercapacitors ◽  
Enhanced Electrochemical Performance

Urchin-like Ni3Si2O5(OH)4 hierarchical hollow sphere/GO composites were synthesized, which showed an enhanced electrochemical performance of 165 F g−1 at 0.5 A g−1 and 84% capacity retention after 5000 cycles.

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