Open AccessMolten salt‐assisted template synthesis of lithium‐rich layered oxide 0.3Li 2 MnO 3 ·0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 nanorods as lithium‐ion battery cathode
Author(s) -
Zhao Chenhao,
Hu Zhibiao,
Shen Qiang
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2014.0335
Subject(s) - nanorod , molten salt , lithium (medication) , faraday efficiency , materials science , salt (chemistry) , cathode , chemical engineering , particle size , oxide , phase (matter) , anode , nanotechnology , chemistry , electrode , metallurgy , organic chemistry , medicine , engineering , endocrinology
Lithium‐rich layered oxide 0.3Li 2 MnO 3 ·0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 nanorods have been prepared by a KCl molten salt‐assisted template route. The nanorods can well retain the rod‐like structure of a β‐MnO 2 template, and have the length of several hundred nanometres and diameters of about one hundred nanometres. In comparison with the sample obtained from immediate solid‐state reaction, the molten salt treatment can help improve the phase purity and decrease the particle size. As a lithium‐ion battery cathode, the KCl‐treated nanorods deliver an initial discharge capacity of 242.9 mAh g −1 with a high Coulombic efficiency of 83.6% at a current density of 20 mA g −1 within 2.0–4.7 V. After 60 cycles, a discharge capacity of 150.8 mAh g −1 can be retained at 0.5 C. Even at a high charge–discharge rate of 4 C (800 mA g −1 ), a stable capacity of 104.2 mAh g −1 can be reached, while the sample obtained from solid‐state reaction only delivers an initial discharge capacity of 179.1 mAh g −1 at 20 mA g −1 .