Mixed phase sodium manganese oxide as cathode for enhanced aqueous zinc-ion storage

Xinyu Wang; Xinghua Qin; Qiongqiong Lu; Mingming Han; Ahmad Omar; Daria Mikhailova

doi:10.1016/j.cjche.2020.05.015

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Mixed phase sodium manganese oxide as cathode for enhanced aqueous zinc-ion storage

Materials and Product Engineering | Updated：2026-01-06

- Mixed phase sodium manganese oxide as cathode for enhanced aqueous zinc-ion storage
- Chinese Journal of Chemical Engineering Vol. 28, Issue 8, Pages: 2214-2220(2020)
- Affiliations：
  
  1. Institute of Materials and Technology, Dalian Maritime University,Dalian,China,116026
  2. Leibniz Institute for Solid State and Materials Research(IFW) Dresden e. V., Helmholtzstraße 20,Dresden,Germany,01069
  3. School of Materials Science and Engineering, Central South University,Changsha,China,410083
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.05.015
  CLC：
- Published：2020
- Accepted：
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Xinyu Wang, Xinghua Qin, Qiongqiong Lu, Mingming Han, Ahmad Omar, Daria Mikhailova. Mixed phase sodium manganese oxide as cathode for enhanced aqueous zinc-ion storage[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2214-2220.
DOI：

Xinyu Wang, Xinghua Qin, Qiongqiong Lu, Mingming Han, Ahmad Omar, Daria Mikhailova. Mixed phase sodium manganese oxide as cathode for enhanced aqueous zinc-ion storage[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2214-2220. DOI： 10.1016/j.cjche.2020.05.015.

摘要

Abstract

Aqueous zinc-ion batteries have been regarded as a promising alternative to large-scale energy storage

due to associated low-cost

improved safety and environmental friendliness. However

a high-performance cathode material for both rate capability and specific capacity is still a challenge. One kind of the more promising candidates are sodium manganese oxide (NMO) materials

although they suffer from individual issues and need to be further improved. Herein

we present a novel mixed phase NMO material composed of nearly equal amounts of Na

0.55

and Na

0.7

MnO

2.05

. The structured configuration with particle size of 200-500 nm is found to be beneficial towards improving the ion diffusion rate during the charge/discharge process. Compared with Na

0.7

MnO

2.05

and Na

0.55

the mixed phase NMO demonstrates an enhanced rate capability and excellent long-term cycling stability with a capacity retention of 83% after 800 cycles. More importantly

the system also delivers an impressive energy density and power density

as 378 W·h·kg

-1

at 68.7 W·kg

-1

or 172 W·h·kg

-1

at 17

05 W·kg

-1

. The superior electrochemical performance is ascribed to the fast Zn

diffusion rate because of a large ratio of capacitive contribution (63.9% at 0.9 mV·s

-1

). Thus

the mixed phase route provides a novel strategy to enhance electrochemical performance

enabling mixed phase NMO as very promising material towards large-scale energy-storage applications.

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