Triple-Shelled Manganese-Cobalt Oxide Hollow Dodecahedra with Highly Enhanced Performance for Rechargeable Alkaline Batteries

Chuangwei Jiao; Zumin Wang; Xiaoxian Zhao; Huan Wang; Jing Wang; Ranbo Yu; Dan Wang

doi:10.1002/anie.201811683

Triple-Shelled Manganese-Cobalt Oxide Hollow Dodecahedra with Highly Enhanced Performance for Rechargeable Alkaline Batteries

Angew Chem Int Ed Engl. 2019 Jan 21;58(4):996-1001. doi: 10.1002/anie.201811683. Epub 2018 Dec 4.

Authors

Chuangwei Jiao^{1

2}, Zumin Wang^{1

2}, Xiaoxian Zhao^{1

2}, Huan Wang^{1

2}, Jing Wang^{1

2}, Ranbo Yu¹, Dan Wang²

Affiliations

¹ School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083, China.
² Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Beijing, 100190, China.

PMID: 30426625
DOI: 10.1002/anie.201811683

Abstract

Precisely carving of multi-shelled manganese-cobalt oxide hollow dodecahedra (Co/Mn-HD) with shell number up to three is achieved by a controlled calcination of the Mn-doped zeolitic imidazolate framework ZIF-67 precursor (Co/Mn-ZIF). The unique multi-shelled and polycrystalline structure not only provides a very large electrochemically active surface area (EASA), but also enhances the structural stability of the material. The residual C and N in the final structures might aid stability and increase their conductivity. When used in alkaline rechargeable battery, the triple-shelled Co/Mn-HD exhibits high electrochemical performance, reversible capacity (331.94 mAh g^-1 at 1 Ag^-1 ), rate performance (88 % of the capacity can be retained with a 20-fold increase in current density), and cycling stability (96 % retention over 2000 cycles).

Keywords: manganese-cobalt oxide; multi-shelled structures; rechargeable alkaline batteries; zeolitic imidazolate frameworks (ZIFs).

Abstract

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