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Biomass derived hierarchically porous carbon inherent structure as an effective metal free cathode for Li‐O2/air battery

Ariharan Arjunan, Maheswari Subbiah, Mahendran Sekar, Ajay Piriya VS., Viswanathan Balasubramanian, Ramaprabhu Sundara
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© 2021 The Authors. Electrochemical Science Advances published by Wiley‐VCH GmbH
https://doi.org/10.1002/elsa.202000037
Published inElectrochemical Science Advances
ISSN2698-5977
eISSN2698-5977

Received8 December 2020

Accepted21 March 2021
Pagesn/a - n/a
Abstract

A hierarchical porous carbon framework derived from betel‐nut is synthesized and employed as a bifunctional cathode in a Li‐O2/air battery. The prepared betel nut derived activated porous carbon (BNAPC) material exhibits an ordered and merged tube‐like porous morphology and a high specific surface area of 768 m2/g. The presence of both meso and micro porous leads to a well‐developed 3D interconnected carbon framework, which provides an efficient path for the diffusion of the reactant (oxygen as well as air) and also allows stocking the discharge product of Li2O2. Therefore, it exhibits a high specific capacity and excellent rate performance. A maximum discharge capacity of 9560 and 2000 mAh/g at a current density of 100 mA/g for oxygen and ambient air respectively as the reactant is achieved. The prepared material also exhibits reversible cyclic stability of 27 cycles with a specific capacity of 1000 mAh/g at a 100 mA/g current density in oxygen atmosphere.

Table of Contents

  1. Biomass derived hierarchically porous carbon inherent structure as an effective metal free cathode for Li-O2/air battery
    1. Abstract
    2. 1 | INTRODUCTION
    3. 2 | EXPERIMENTAL SECTION
      1. 2.1 | Materials
      2. 2.2 | Methods
    4. 3 | ELECTRODES PREPARATION AND ELECTROCHEMICAL CHARACTERIZATION
    5. 4 | PHYSICAL CHARACTERIZATION
    6. 5 | RESULTS AND DISCUSSION
      1. 5.1 | Morphology and Microstructure
      2. 5.2 | Electrochemical Performance
    7. 6 | CONCLUSIONS
    8. ACKNOWLEDGMENT
      1. DATA AVAILABILITY STATEMENT
    9. CONFLICT OF INTEREST
    10. ORCID
    11. REFERENCES
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