Improved supercapacitors by implanting ultra-long single-walled carbon nanotubes into manganese oxide domains

Electrochemistry of rechargeable aqueous zinc/zinc-sulphate/manganese-oxide batteries and methods for preparation of high-performance cathodes

“…The energy splitting distance was recorded to be 5.0 eV, which is larger than 4.78 eV, the energy splitting distance of Mn 3s of Mn(IV). 12,13 This implied that the pristine, as-prepared cathode consisted of both Mn(IV) and Mn(III).…”

“…Details regarding methods for preparing the SWCNT/manganese-oxide based cathode are described in the Experimental section and in our previous studies. 12,21,22…”

“…Details regarding methods for preparing the SWCNT/manganese-oxide based cathode are described in the Experimental section and in our previous studies. 12,21,22 For demonstrating the advantageous properties of the multilayer SWCNT/manganese-oxide based electrode, another cathode that carried an identical mass loading (1.8 mg cm À2 ) and an identical overall thickness (8 mm) of manganese oxides but did not contain the 3D-SWCNT-networks in manganese oxides was also prepared via electrochemical deposition. The anode (Zn) was prepared via electrochemical deposition with the same wired mesh as the current collectors.…”

Emergent pseudocapacitive behavior of single-walled carbon nanotube hybrids: a materials perspective

“…The primary reason is the high theoretical specific capacitance of MnO 2 , as high as 1233 F g À1 accounted for single electron transfer between Mn(III) and Mn(IV) over 0.9 V. 70 Among the several groups that have explored MnO 2 /SWCNT structures, most have emphasized the effect of varying mass loadings on electrochemical performance. [71][72][73][74] V. Subramanian et al prepared MnO 2 / SWCNT composites via a simple precipitation route containing different weight ratios of SWCNTs ranging from 5 to 40%. The specific capacitance values were found to be 195, 180, 162, and 151 F g À1 for 5, 10, 20, and 40 wt% of SWCNTs, displaying a decreasing trend while increasing the SWCNT amount.…”

Binder-free Mn–V–Sn oxyhydroxide decorated with metallic Sn as an earth-abundant supercapattery electrode for intensified energy storage

“…16 The high resolution Mn 2p spectrum showed two main peaks at 654.6 and 642.5 eV referring to Mn 2p 3/2 and Mn 2p 1/2 , respectively. [60][61][62] Upon Gaussian tting, the overlapped Mn 2p 3/2 peak is deconvoluted into three peaks at 642, 643.8, and 647.2 eV as shown in Fig. 4b.…”