Enhanced Supercapacitor Performance of MnO₂ by Atomic Doping

Abstract

Electrochemical energy storage: The performance of MnO2 as a pseudo‐capacitive material was enhanced by doping electrodeposited MnO2 with physically deposited gold atoms (see picture). The resulting MnO2 electrodes showed an enhanced electronic conductivity and a remarkable stability under voltammetric cycling.

A facile one-step approach to hierarchically assembled core–shell-like MnO2@MnO2 nanoarchitectures on carbon fibers: An efficient and flexible electrode material to enhance energy storage

“…have been extensively investigated as electrode materials for pseudocapacitors [23][24][25][26][27][28][29]. Among them, MnO 2 nanostructures (NSs) have received considerable attention because of their high theoretical specific capacitance, environmental friendliness, low cost, and low toxicity [30,31]. MnO 2 NSs with controllable shapes and sizes have been synthesized using different growth methods [32][33][34].…”

Influence of vanadium doping on the supercapacitance performance of hexagonal birnessite

“…The latter method improved the conductivity of manganese oxides and facilitated the fast transport of ions and electrons during chargeedischarge processes [5], and the pseudocapacitance of MnO 2 encapsulated within CNTs was greatly enhanced to 1250 F g À1 [9]. It was reported that doping metallic elements, such as Al, Sn and Au, was also an important way to modify manganese oxide electrodes to enhance their electrochemical performance [5,10]. Physical vapor deposition was performed to synthesize a thick Au-doped MnO 2 film with a ultrahigh specific capacitance of 626 F g À1 at a scan rate of 5 mV s À1 [10].…”

Sustainable process for all-carbon electrodes: Horticultural doping of natural-resource-derived nano-carbons for high-performance supercapacitors

“…In the interstitial/intercalative doping process, dopants are directly incorporated into the lattice of a nanostructure [44,45]. In contrast, the surface doping process attaches functional groups onto the defective sites at the surface or edge of the nanostructure [7,43].…”