Correction : Transition metal hollow nanocages as promising cathodes for the long-term cyclability of Li–O2 batteries(Nanomaterials, (2018), 8): Transition metal hollow nanocages as promising cathodes for the long-term cyclability of Li–O2 batteries(Nanomaterials, (2018), 8)

Amrita Chatterjee, Siu Wing Or, Yulin Cao

Research output: Journal article publicationComment/debate/erratumAcademic research

Abstract

The authors wish to add the following information to this paper [1]. The last paragraph of Section 1 in the Introduction has been replaced by the following two paragraphs: One of the drawbacks of using these spinel structured oxides is their low surface area [12]. In our previous work [16], we have announced the preliminary results and initial observations on the basic morphology and magnetism of a highly porous spinel-type, Mn3O4, called Mn3O4 hollow nanocages (MOHNs), in addition to the general electrochemical performance of MOHNs/Ketjenblack (KB) cathode-based Li-O2 batteries. It has been demonstrated that the use of a simple facile template assisted growth technique is capable of producing crystalline paramagnetic MOHNs composed of many 25 nm mean diameter Mn3O4 nanoparticles, loosely agglomerated together to form the shell of a mesoporous hollow nanocage structure with a large mean diameter of 250 nm and a high surface area of 90.65 m2·g-1. Moreover, the resulting MOHNs/KB cathode-based Li-O2 batteries exhibit more than 50 discharge-charge cycles at a reversible restrained specific capacity of 600 mAh·g-1 and a specific current of 400 mA·g-1. This paper is extended from the previous proceedings paper [16]. It broadens the previous focus on the physical aspect of MOHNs to the physicochemical aspect of MOHNs. We thereby provide a more comprehensive evaluation and elaboration on the physicochemical properties and formation mechanism of MOHNs, as well as the electrochemical performance of MOHNs/KB cathode-based Li-O2 batteries. An analysis of death batteries is also performed, in order to understand how the mesoporous hollow nanocage structure of MOHNs provides a pathway for better diffusion of reactants and products, how it prevents the blockage of pores from Li-O2, and how it improves the cyclic stability of Li-O2 batteries. The figure captions of Figures 2-5 are added with the following statements: Figure 2a is reproduced with permission from [16]. Copyright IEEE, 2018. Figure 3b is reproduced with permission from [16]. Copyright IEEE, 2018. Figure 4a,d are reproduced with permission from [16]. Copyright IEEE, 2018. Figure 5 is reproduced with permission from [16]. Copyright IEEE, 2018. The authors regret any inconvenience or misunderstanding caused by these errors. The manuscript will be updated and the original will remain available on the article webpage.

Original languageEnglish
Article number748
JournalNanomaterials
Volume8
Issue number10
DOIs
Publication statusPublished - Oct 2018

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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