通过喷雾干燥法合成的用于水系钠离子电池的Na₄Mn₉O-还原氧化石墨烯复合材料的电化学性质

Electrochemical Properties of an Na₄Mn₉O-Reduced Graphene Oxide Composite Synthesized via Spray Drying for an Aqueous Sodium-Ion Battery.

作者信息

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

机构信息

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.

Synergy Innovation Institute of GDUT, Heyuan 517000, China.

出版信息

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

DOI:10.3390/nano7090253

PMID:28869496

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5618364/

Abstract

An aqueous sodium ion battery (ASIB) with metal Zn as anode and Na₄Mn₉O-reduced graphene oxide (Na₄Mn₉O-RGO) as cathode has been developed. In this work, spherical Na₄Mn₉O-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 is attained at a high current rate of 4 C, and a stabilizing reversible capacity of 58.9 mAh·g 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 Na₄Mn₉O-RGO electrode displayed superior electrochemical performance in the ASIB.

摘要

一种以金属锌为阳极、Na₄Mn₉O-还原氧化石墨烯（Na₄Mn₉O-RGO）为阴极的水系钠离子电池（ASIB）已被开发出来。在这项工作中，通过喷雾干燥制备了球形Na₄Mn₉O-RGO复合颗粒。该水系电池表现出稳定的循环性能和高比容量。通常，在4 C的高电流倍率下可获得61.7 mAh·g的高初始放电容量，在150次循环后可获得58.9 mAh·g的稳定可逆容量。由RGO片层交织而成的网络提供了快速的电子传导路径和结构稳定性，以适应钠嵌入和脱出所引起的机械应力，因此Na₄Mn₉O-RGO电极在ASIB中表现出优异的电化学性能。