Composite of Li-Rich Mn, Ni and Fe Oxides as Positive Electrode Materials for Li-Ion Battery. Issue 8 (13th May 2016)

• Record Type: Journal Article
• Authors: Penki, Tirupathi Rao; Shanmughasundaram, D.; Kishore, Brij; Jeyaseelan, A. V.; Subramani, A. K.; Munichandraiah, N.
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 8(2016)
• Page Start: A1493
• Page End: A1502
• Publication Date: 2016-05-13
• Subjects: high discharge capacit -- lithium excess manganese oxide composite -- Polymer template -- porous materials; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0121608jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : A porous layered composite of Li2 MnO3 and LiMn1/3 Ni1/3 Fe1/3 O2 (composition: Li1.2 Mn0.53 Ni0.13 Fe0.13 O2 ) is prepared by reverse microemulsion method employing tri-block co-polymer, F068 as a soft-polymer template. The Co-free composite is studied as a cathode material for Li-ion battery. Several samples are prepared by heating the precursor in the temperature range between 500 and 900°C. The N2 adsorption/desorption studies reveal that the product samples possess mesoporosity with broadly distributed pores around 15–50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. Charge-discharge, cycling and rate capability are investigated. The discharge capacity of the sample prepared at 900°C is about 170 mAh g −1 at a specific current of 25 mA g −1 with a good cycling stability. A value of 140 mAh g −1 is obtained at the end of 50 charge-discharge cycles. Discharge capacity of 91 mAh g −1 is obtained at a specific current of 206 mA g −1 . A high rate capacity of the composite is attributed to its porous nature.