K0.25Mn2O4 nanofiber microclusters as high power cathode materials for rechargeable lithium batteries

Authors

Chaofeng Zhang, University of WollongongFollow
Chuanqi Feng, Hubei University, ChinaFollow
Peng Zhang, University of Wollongong
Zaiping Guo, University of WollongongFollow
Zhixin Chen, University of WollongongFollow
Sean Li, University of New South Wales
Hua-Kun Liu, University of WollongongFollow

RIS ID

49792

Publication Details

Zhang, C, Feng, C, Zhang, P, Guo, Z, Chen, Z, Li, S & Liu, HK (2012), K0.25Mn2O4 nanofiber microclusters as high power cathode materials for rechargeable lithium batteries, RSC Advances, 2(4), pp. 1643-1649.

Abstract

K_0.25Mn₂O₄ microclusters assembled from single-crystalline nanofibers were synthesized via a hydrothermal process at different temperatures. The possibility of using these materials as cathode material for lithium ion batteries was studied for the first time. The charge/discharge results showed that the K_0.25Mn₂O₄ nanofiber microclusters synthesized at 120 degrees C exhibit excellent lithium storage properties, with a high reversible capability (360 mA h g^-1 at current density of 100 mA g^-1) and stable lithium-ion insertion/de-insertion reversibility. The charge/discharge mechanism in lithium ion batteries was studied and proposed for the first time. During the charge process, K⁺ was extracted from the electrode, which made active vacated sites suitable for lithium ion intercalation and was beneficial for increasing capacity.

Grant Number

ARC/DP1094261

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP1094261