Phase-Transformation-Activated MnCO<sub>3</sub> as Cathode Material of Aqueous Zinc-Ion Batteries
Funian Mo,
Mangwei Cui,
Liangliang Yang,
Hao Lei,
Sheng Chen,
Jun Wei,
Litao Kang
Affiliations
Funian Mo
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Mangwei Cui
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Liangliang Yang
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Hao Lei
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Sheng Chen
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Jun Wei
Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Litao Kang
College of Environment and Materials Engineering, Yantai University, Yantai 264005, China
The intrinsic high safety of rechargeable aqueous batteries makes them particularly advantageous in the field of large-scale energy storage. Among them, rechargeable Zn–Mn batteries with high energy density, low cost, high discharge voltage, and nontoxicity have been considered as one of the most promising aqueous battery systems. However, exiting research on manganese-based cathode materials mainly focuses on diverse manganese oxides analogs, while reports on other promising manganese-based analogs with high performance are still limited. Herein, we report a MnCO3 cathode material, which can be manufactured on a large scale by a facile coprecipitation method. Interestingly, the MnCO3 can spontaneously be converted into MnO2 material during the charging process. The Zn–MnCO3 battery delivers a highly specific capacity (280 mAh g−1) even at the high current density of 50 mA g−1. It is also noteworthy that the battery with a high loading mass (7.2 mg cm−2) exhibits good reversibility of charge–discharge for 2000 cycles, showing a competitive cycling stability in aqueous systems.
