Transition Metal Hollow Nanocages as Promising Cathodes for the Long-Term Cyclability of Li⁻O₂ Batteries.

ABSTRACT: As a step towards efficient and cost-effective electrocatalytic cathodes for Li⁻O₂ batteries, highly porous hausmannite-type Mn₃O₄ hollow nanocages (MOHNs) of a large diameter of ~250 nm and a high surface area of 90.65 m²·g−1 were synthesized and their physicochemical and electrochemical properties were studied in addition to their formation mechanism. A facile approach using carbon spheres as the template and MnCl₂ as the precursor was adopted to suit the purpose. The MOHNs/Ketjenblack cathode-based Li⁻O₂ battery demonstrated an improved cyclability of 50 discharge⁻charge cycles at a specific current of 400 mA·g−1 and a specific capacity of 600 mAh·g−1. In contrast, the Ketjenblack cathode-based one can sustain only 15 cycles under the same electrol

SUBMITTER: Chatterjee A 

PROVIDER: S-EPMC5977322 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature