Enhanced sodium-ion storage capability of P2/O3 biphase by Li-ion substitution into P2-type Na0.5Fe0.5Mn0.5O2 layered cathode

Veerasubramani, Ganesh Kumar and Subramanian, Yuvaraj and Park, Myung-Soo and Senthilkumar, Baskar and Eftekhari, Ali and Kim, Sang Jae and Kim, Dong-Won (2019) Enhanced sodium-ion storage capability of P2/O3 biphase by Li-ion substitution into P2-type Na0.5Fe0.5Mn0.5O2 layered cathode. In: ELECTROCHIMICA ACTA, 296 . pp. 1027-1034.

PDF Ele_Act_296_1027_2019.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy

Abstract

Integration of P2 and O3 phases in Na0.5Fe0.5Mn0.5O2 cathode via Li-ion substitution is proposed to enhance its electrochemical performance for sodium-ion battery applications. The formation of P2 and the combination of P2/O3 intergrowth were confirmed by X-ray diffraction refinement, high resolution transmission electron microscopy and X-ray photoelectron microscopy analyses. Various content of lithium was used to find optimum P2+O3 combinations. The optimized Li-ion substituted Na-0.5(Li0.10-Fe0.45Mn0.45)O-2 showed a high initial discharge capacity of 146.2 mAh g(-1) with improved cycling stability, whereas the pristine Na0.5Fe0.5 Mn0.5O2 initially delivered a discharge capacity of 127.0 mAh g(-1). In addition, the combination of P2+O3 increased its average voltage, which is important for achieving high energy density sodium-ion batteries. Overall, the prepared Na-0.5 (Li0.10Fe0.45Mn0.45)O(2)electrode exhibited the improved cycling performance in terms of reversible capacity and rate capability compared to pristine Na0.5Fe0.5Mn0.5O2 electrode material. (C) 2018 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ELECTROCHIMICA ACTA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords:	Sodium-ion battery; Cathode; Layered material; P2/O3 structure; Electrochemical performance
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	28 Jan 2019 11:47
Last Modified:	28 Jan 2019 11:47
URI:	http://eprints.iisc.ac.in/id/eprint/61519

Actions (login required)

View Item