Asymmetric supercapacitors with high energy density based on helical hierarchical porous NaxMnO2 and MoO2 † †Electronic supplementary information (ESI) available. See DOI: 10.1039/c5sc03326h Click here for additional data file.

نویسندگان

  • Xue-Feng Lu
  • Zhi-Xiang Huang
  • Ye-Xiang Tong
  • Gao-Ren Li
چکیده

Helical hierarchical porous NaxMnO2/CC and MoO2/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 NaxMnO2/CC as the positive electrodes and helical MoO2/CC as the negative electrodes, high performance NaxMnO2/CC//MoO2/CC asymmetric supercapacitors (ASCs) are successfully assembled, and they achieve a maximum volume Csp 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% Csp retention after 6000 cycles.

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Asymmetric supercapacitors with high energy density based on helical hierarchical porous Na x MnO2 and MoO2.

Helical hierarchical porous Na x MnO2/CC and MoO2/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 MnO2/CC as the positive electrodes and helical MoO2/CC as the negati...

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Metalloradical activation of α-formyldiazoacetates for the catalytic asymmetric radical cyclopropanation of alkenes† †Electronic supplementary information (ESI) available. CCDC 1532256. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7sc00658f Click here for additional data file. Click here for additional data file.

For the first time, a-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(II)-based metalloradical catalysis. The cobalt(II) complex of the D2symmetric chiral amidoporphyrin [Co(3,5-DiBu-ChenPhyrin)] is an effective metalloradical catalyst that can activate a-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with varie...

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عنوان ژورنال:

دوره 7  شماره 

صفحات  -

تاریخ انتشار 2016