Open AccessIn Situ Oriented Mn Deficient ZnMn 2 O 4 @C Nanoarchitecture for Durable Rechargeable Aqueous Zinc‐Ion Batteries
Author(s) -
Islam Saiful,
Alfaruqi Muhammad Hilmy,
Putro Dimas Yunianto,
Park Sohyun,
Kim Seokhun,
Lee Seulgi,
Ahmed Mohammad Shamsuddin,
Mathew Vinod,
Sun YangKook,
Hwang JangYeon,
Kim Jaekook
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202002636
Subject(s) - cathode , manganese , materials science , chemical engineering , aqueous solution , porosity , current density , conductivity , stoichiometry , metallurgy , chemistry , composite material , physics , quantum mechanics , engineering
Manganese (Mn)‐based cathode materials have garnered huge research interest for rechargeable aqueous zinc‐ion batteries (AZIBs) due to the abundance and low cost of manganese and the plentiful advantages of manganese oxides including their different structures, wide range of phases, and various stoichiometries. A novel in situ generated Mn‐deficient ZnMn 2 O 4 @C (Mn‐d‐ZMO@C) nanoarchitecture cathode material from self‐assembly of ZnO‐MnO@C for rechargeable AZIBs is reported. Analytical techniques confirm the porous and crystalline structure of ZnO‐MnO@C and the in situ growth of Mn deficient ZnMn 2 O 4 @C. The Zn/Mn‐d‐ZMO@C cell displays a promising capacity of 194 mAh g −1 at a current density of 100 mA g −1 with 84% of capacity retained after 2000 cycles (at 3000 mA g −1 rate). The improved performance of this cathode originates from in situ orientation, porosity, and carbon coating. Additionally, first‐principles calculations confirm the high electronic conductivity of Mn‐d‐ZMO@C cathode. Importantly, a good capacity retention (86%) is obtained with a year‐old cell (after 150 cycles) at 100 mA g −1 current density. This study, therefore, indicates that the in situ grown Mn‐d‐ZMO@C nanoarchitecture cathode is a promising material to prepare a durable AZIB.