scholarly journals Ni2Mn-layered double oxide electrodes in organic electrolyte based supercapacitors

RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27267-27275
Author(s):  
Jindui Hong ◽  
Chunping Chen ◽  
Ampornphan Siriviriyanun ◽  
Dana-Georgiana Crivoi ◽  
Philip Holdway ◽  
...  

Ni2Mn-layered double oxide (LDO) electrode not only expands the working voltage and enhances the specific capacitance of layered double hydroxide (LDH) in the organic electrolyte but also outperforms NiO, MnO2 and their physical mixture.

2021 ◽  
Author(s):  
Shi-Bing Lv ◽  
Hong-Yan Zeng ◽  
Kai-Min Zou ◽  
Sheng Xu ◽  
Yi-Wen Long ◽  
...  

NiCoZnS@NiCoFe-LDH with a unique coral-like core–shell structure and a high specific capacitance of 1524.0 C g−1 was successfully prepared.


RSC Advances ◽  
2016 ◽  
Vol 6 (30) ◽  
pp. 24952-24958 ◽  
Author(s):  
Hye Jin Nam ◽  
Eun Bi Park ◽  
Duk-Young Jung

Interlayer polymerization of dopamine into a LDH layer enabled the preparation of multifunctional hybrid nanostructures with strong adhesion and high specific capacitance.


2014 ◽  
Vol 1035 ◽  
pp. 7-11 ◽  
Author(s):  
Xiang Li Xie ◽  
Jie Zhang ◽  
Lin Jiang Wang

The Mg-Al layered double hydroxide (LDH) with carbonate interaction was synthesized by the urea method under hydrothermal conditions and layered double oxide (LDO) was prepared by calcination of LDH. The LDO was used as adsorbents for the removal of lead from aqueous solutions. The X-ray diffraction patterns of the LDO demonstrate that the adsorption is significantly enhanced by reconstruction of its original layered structure in the presence of lead with the memory effect. The process involved a fast adsorption within three hours, followed by slower, more gradual and stable adsorption. The adsorption capability for lead is 6.26 mg/g. The results indicate that the calcined Mg-Al layered double hydroxide is an efficient adsorbent for the treatment of waste water with heavy metal ions.


2017 ◽  
Vol 46 (23) ◽  
pp. 7388-7391 ◽  
Author(s):  
Peng-Fei Liu ◽  
Jiao-Jiao Zhou ◽  
Guo-Chang Li ◽  
Meng-Ke Wu ◽  
Kai Tao ◽  
...  

A hierarchical NiO/NiMn-LDH nanosheet array on Ni foam was preparedviaa facile two-step approach and exhibited a high specific capacitance (937 F g−1at 0.5 A g−1) and good cycling stability (91% retention after 1000 cycles at 5 A g−1).


Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 976 ◽  
Author(s):  
Guoshen Yang ◽  
Takahiro Takei ◽  
Sayaka Yanagida ◽  
Nobuhiro Kumada

Electrodes with nanosheet architectures can offer the possibility to achieve enhanced energy storage performance. Herein, we have designed and synthesized novel nanosheet structures of CoAl layered double hydroxide (LDH)-polyaniline (PANI) nanocomposite thin films by a hydrothermal-electrodeposition method. The molecular structure, crystal structure, morphology and chemical composition of the composites were characterized by FT-IR, XRD (SXRD), FESEM, and XPS, whereas their electrochemical properties were evaluated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge tests. Compared with the unmodified CoAl LDH, the CoAl LDH-PANI exhibits significantly improved the specific capacitance and cyclic stability. The composite exhibits a high specific capacitance of 528 F/g at a current density of 10 A/g and excellent cyclic stability with an increase of the specific capacitance of 42.7% after 6000 cycle tests. We revealed the degradation behavior of PANI in 1 M KOH/KCl electrolyte, and the active degradation products also further increased the total specific capacitance of the composite. The enhanced electrochemical performance of the nanocomposite can be attributed to its well-designed nanostructure and the synergistic effects of each component. By analyzing the band structure and density of states of CoAl LDH and PANI, we proposed the possible mechanism of synergistic effect in a new perspective.


2014 ◽  
Vol 43 (30) ◽  
pp. 11667-11675 ◽  
Author(s):  
Jie Xu ◽  
Shili Gai ◽  
Fei He ◽  
Na Niu ◽  
Peng Gao ◽  
...  

A novel sandwich-structured rGO/Ni0.83Co0.17Al-LDH hybrid composite exhibits high supercapacitor performance, with a specific capacitance of 1902 F g−1 at 1 A g−1, and excellent cycling stability.


Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7168-7173 ◽  
Author(s):  
Yufei Zhao ◽  
Qing Wang ◽  
Tong Bian ◽  
Huijun Yu ◽  
Hua Fan ◽  
...  

Ni3+doped NiTi-LDH monolayer nanosheets with lateral dimensions ∼20 nm and a ultrathin thickness of ∼0.9 nm prepared through a facile bottom-up approach exhibit excellent supercapacitive performances, including extremely high specific capacitance (2310 F g−1at 1.5 A g−1) and long-term cycling life compared with bulk LDH.


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