Journal
NANOMATERIALS
Volume 8, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/nano8050301
Keywords
manganese oxide; hollow structure; multivalent intercalation; zinc ion batteries
Categories
Funding
- National Key Research and Development Program of China [2017YFA0402800, 2017YFA0206700]
- National Natural Science Foundation of China [21776265]
- RAMP
- D Department of PetroChina
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Aqueous rechargeable zinc-manganese dioxide (Zn-MnO2) batteries are considered as one of the most promising energy storage devices for large scale-energy storage systems due to their low cost, high safety, and environmental friendliness. However, only a few cathode materials have been demonstrated to achieve stable cycling for aqueous rechargeable Zn-MnO2 batteries. Here, we report a new material consisting of hollow MnO2 nanospheres, which can be used for aqueous Zn-MnO2 batteries. The hollow MnO2 nanospheres can achieve high specific capacity up to similar to 405 mAh g(-1) at 0.5 C. More importantly, the hollow structure of birnessite-type MnO2 enables long-term cycling stability for the aqueous Zn-MnO2 batteries. The excellent performance of the hollow MnO2 nanospheres should be due to their unique structural properties that enable the easy intercalation of zinc ions.
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