MnO Stabilized in Carbon‐Veiled Multivariate Manganese Oxides as High‐Performance Cathode Material for Aqueous Zn‐Ion Batteries

Abstract

Aqueous Zn‐ion battery has emerged as one of the most prospective energy storage devices due to its low cost, high safety, and eco‐friendliness. However, Zn‐ion batteries are bottlenecked by significant capacity fading during long‐term cycling and poor performance at high current rates. Here, we report an available cooperation of multivariate manganese oxides@carbon hybrids (MnO2/MnO@C and MnO2/Mn3O4@C) via a plasma‐assisted design as an attractive Zn‐ion cathode. Among them, the MnO2/MnO@C cathode exhibits a reversible specific capacity of 165 mAh g−1 over 200 cycles at a high rate of 0.5 A g−1, and possesses great rate performance with high capacities of 110 and 100 mAh g−1 at a high rate of 0.8 and 1 A g−1, respectively. The good cathode performance significantly results from the facile charge transfer and ions (Zn2+ and H+) insertion in the manganese oxides/carbon hybrids featuring phase stability behavior in the available cooperation of multivalence and carbon conductive substrates. This work will promote the Zn‐manganese dioxide system for the design of low‐cost and high‐performance aqueous rechargeable Zn‐ion batteries.

Mo-Pre-Intercalated MnO2 Cathode with Highly Stable Layered Structure and Expanded Interlayer Spacing for Aqueous Zn-Ion Batteries

“…In the past decade, various cathode materials have been investigated in ZIBs, including manganese-based oxides, , vanadium oxides, , and Prussian blue analogs . Among them, MnO 2 exhibits great prospects as cathode materials for ZIBs because of its multiple benefits of a desirable theoretical capacity, high voltage platform, simple synthesis process, and low cost.…”

Exploiting the synergistic effect of multiphase MnO2 stabilized by an integrated conducting network for aqueous zinc-ion batteries

“…4e, and a very high specific capacity was obtained for the present aqueous ZIBs. 25,[38][39][40][41][42][43][44][45] Previously reported studies suggest that the wettability of the electrode surface is closely related to electrochemical reactions, such as capacity exertion and cycle stability. 46 The change of electrode wettability can significantly change the wetting-process time and the contact between the active site and Zn 2+ , thus affecting the kinetic rate of the electrochemical reaction in the process of Zn 2+ transfer.…”

Stable Imprinted Zincophilic Zn Anodes with High Capacity

“…Besides, the MnO 2 @C//Sn@Zn-IP can also exhibit a high energy density of 127.12 Wh kg -1 at a power density of 1290 W kg -1 , which is higher than those of previously reported ZIBs. [48][49][50][51][52][53]…”