doi:10.3969/j.issn.2095-4239.2016.03.010

Abstract

Abstract: Sodium-ion batteries have attracted widespread attentions due to the abundant sodium resources and their potential low cost. It is crucial to develop low-cost and excellent performance cathode materials for SIBs. Herein, O3-NaCu_1/9Ni_2/9Fe_1/3Mn_1/3O₂, a novel cathode material without Mn³⁺ has been synthesized by a simple solid-state reaction. Galvanostatic charge/discharge measurement for the O3-NaCu_1/9Ni_2/9Fe_1/3Mn_1/3O₂ electrode between 2.0V and 4.0 V provides a reversible capacity of 127 mA·h/g and the average discharge voltage of 3.1 V. The full cell using it as the cathode and hard carbon as the anode delivers an energy density of 248 W·h/kg, an energy conversion efficiency of 93% and an excellent cycling performance.

Key words: layered oxide, cathode materials, sodium-ion batteries

MU Linqin, QI Xinguo, HU Yong sheng, LI Hong, CHEN Liquan, HUANG Xuejie . [J]. Energy Storage Science and Technology, doi: 10.3969/j.issn.2095-4239.2016.03.010.

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