All-amorphous CNT-MnO2 nanoflaky hybrid for improved supercapacitor applications

Recent Progress in Some Amorphous Materials for Supercapacitors

“…Moreover, as an electrode for SCs, it showed a high energy density (22.56 Wh kg −1 at 224.9 W kg −1 ). In another study, Ganguly et al used a common low‐temperature chemical strategy to synthesize amorphous CNT–MnO 2 nanohybrids. The test results were as expected.…”

Influence of La3+induced defects on MnO2–carbon nanotube hybrid electrodes for supercapacitors

“…In order to overcome these demerits, some researchers have induced artificial defectsinto the MnO 2 latticeby introducing dopants(like Ag, V, B, Fe, Cu and Zn) [8][9][10][11][12][13]to improve the electrical conductivity of MnO 2 but the problem of poor cyclic stability still remained.Due to their good electrical conductivity, mechanical and chemical stability, and large specific surface area, CNTs have found widespread applications [14][15][16] including in supercapacitors assomeresearchers combined MnO 2 with multiwalled CNTs (MWCNTs) in order to improve both electrical conductivity and cycle stability of MnO 2 [17][18][19][20][21][22][23].These reports showed some improvements in the electrode performance as a result of doping of cations into MnO 2 as well as for coupling with CNTs but the value of specific capacitance still did not cross beyond a few hundred F/g. Interestingly, although MnO 2 based electrode that is both doped with cationsand coupled with CNTsis likely to have high performance due to synergistic influence on the electrical conductivity and cyclic stability, it has not been explored till date.…”

Improved Specific Capacity of Nb2O5 by Coating on Carbon Materials for Lithium‐Ion Batteries

“…To confirm our conjecture, the XRD patterns of as‐prepared materials were collected and made a comparison in Figure (a). However, there are only broad diffraction peaks in Figure (a), suggesting the materials crystallinities are relatively poor . According to the XRD patterns, it cannot be verified that what we obtained are Nb 2 O 5 exactly.…”