Improvement in the Performance of Composite Cathode via Solid Electrolyte for High Electrochemical Performance of Li–S Battery

Author:

Patodia Tarun1ORCID,Sahu Rajesh2,Tripathi Balram3,Ichikawa Takayuki4,Jain Sushil Kumar5,Jain Ankur26

Affiliation:

1. School of Applied Sciences Suresh Gyan Vihar University Jaipur 302017 India

2. Centre for Renewable Energy and Storage Suresh Gyan Vihar University Jaipur 302017 India

3. Department of Physics S. S. Jain Subodh P.G. (Autonomous) College Jaipur 302004 India

4. Graduate School of Advanced Science and Engineering Hiroshima University 1‐4‐1 Kagamiyama Higashi‐Hiroshima 739‐8527 Japan

5. Department of Physics Manipal University Jaipur Jaipur 303007 India

6. Natural Science Centre for Basic Research and Development Hiroshima University Higashi‐Hiroshima 739‐8530 Japan

Abstract

AbstractCommercialization of Li–S in present scenario is obstructed by poor performance of cathode and its compatibility with electrolyte used. Here in this work, in order to improve the electrochemical performance all solid state Li–S battery, solid electrolyte (SE) formed by composition of lithium sulfide (Li2S) and phosphorus pentasulfide (P2S5) combinedly called LPS is used. The modified carbon in the form of graphene oxide (GO) and reduced graphene oxide (rGO) as additive is used to provide better electron conduction pathway. High conductivity of the order 10−4 S cm−1 of prepared LPS overcomes the major drawback of insulating nature of sulfur. The coin cells are fabricated by using above mentioned material as a cathode material, LPS as SE, and lithium foil as anode. The prepared nanocomposites are characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM) to study structural and morphological properties. Energy dispersive X‐ray spectroscopy (EDS) images of the cathode surface confirms the uniform spreading of material. The electrochemical performance of coin cell is studied by Galvanostatic charge‐discharge plot at 0.1 C to check the compatibility of composite and electrolyte prepared. The cells having additive material GO and rGO with host sulfur show better results as compared to the cell having pristine sulfur.

Funder

Science and Engineering Research Board

Publisher

Wiley

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