Asymmetric supercapacitors with high energy density based on helical hierarchical porous Na(x)MnO(2) and MoO(2)

Helical hierarchical porous Na(x)MnO(2)/CC and MoO(2)/CC, which are assembled from nanosheets and nanoparticles, respectively, are fabricated using a simple electrodeposition method. These unique helical porous structures enable electrodes to have a high capacitance and an outstanding cycling perfor...

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Detalles Bibliográficos
Autores principales: Lu, Xue-Feng, Huang, Zhi-Xiang, Tong, Ye-Xiang, Li, Gao-Ren
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2016
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5519956/
https://www.ncbi.nlm.nih.gov/pubmed/28791103
http://dx.doi.org/10.1039/c5sc03326h
Descripción
Sumario:Helical hierarchical porous Na(x)MnO(2)/CC and MoO(2)/CC, which are assembled from nanosheets and nanoparticles, respectively, are fabricated using a simple electrodeposition method. These unique helical porous structures enable electrodes to have a high capacitance and an outstanding cycling performance. Based on the helical Na(x)MnO(2)/CC as the positive electrodes and helical MoO(2)/CC as the negative electrodes, high performance Na(x)MnO(2)/CC//MoO(2)/CC asymmetric supercapacitors (ASCs) are successfully assembled, and they achieve a maximum volume C (sp) of 2.04 F cm(–3) and a maximum energy density of 0.92 mW h cm(–3) for the whole device and an excellent cycling stability with 97.22% C (sp) retention after 6000 cycles.

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