Electrochemical Properties of an Na₄Mn₉O18-Reduced Graphene Oxide Composite Synthesized via Spray Drying for an Aqueous Sodium-Ion Battery

Fuxing Yin; Zhengjun Liu; Yan Zhao; Yuting Feng; Yongguang Zhang

doi:10.3390/nano7090253

Electrochemical Properties of an Na₄Mn₉O₁₈-Reduced Graphene Oxide Composite Synthesized via Spray Drying for an Aqueous Sodium-Ion Battery

Nanomaterials (Basel). 2017 Sep 2;7(9):253. doi: 10.3390/nano7090253.

Authors

Fuxing Yin¹, Zhengjun Liu², Yan Zhao³, Yuting Feng⁴, Yongguang Zhang⁵

Affiliations

¹ School of Materials Science & Engineering, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China. yinfuxing@hebut.edu.cn.
² School of Materials Science & Engineering, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China. lzj125@126.com.
³ School of Materials Science & Engineering, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China. yanzhao1984@hebut.edu.cn.
⁴ Synergy Innovation Institute of GDUT, Heyuan 517000, China. 18222385469@163.com.
⁵ School of Materials Science & Engineering, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China. yongguangzhang@hebut.edu.cn.

Abstract

An aqueous sodium ion battery (ASIB) with metal Zn as anode and Na₄Mn₉O₁₈-reduced graphene oxide (Na₄Mn₉O₁₈-RGO) as cathode has been developed. In this work, spherical Na₄Mn₉O₁₈-RGO composite particles were prepared via spray drying. The aqueous battery exhibits stable cyclability and high specific capacities. Typically, a high initial discharge capacity of 61.7 mAh·g^-1 is attained at a high current rate of 4 C, and a stabilizing reversible capacity of 58.9 mAh·g^-1 was obtained after 150 cycles. The network interlaced by RGO sheets provided fast electron conduction paths and structural stability to accommodate the mechanical stresses induced by sodium insertion and extraction, so the Na₄Mn₉O₁₈-RGO electrode displayed superior electrochemical performance in the ASIB.

Keywords: Na4Mn9O18; aqueous sodium-ion battery; cathode; energy storage materials.