Acta Phys. -Chim. Sin. ›› 2018, Vol. 34 ›› Issue (6): 581-597.doi: 10.3866/PKU.WHXB201711222

• REVIEW • Previous Articles     Next Articles

Advances in Electrode Materials for Aqueous Rechargeable Sodium-Ion Batteries

Shuang LIU,Lianyi SHAO,Xuejing ZHANG,Zhanliang TAO*(),Jun CHEN   

  • Received:2017-10-27 Published:2018-03-20
  • Contact: Zhanliang TAO E-mail:taozhl@nankai.edu.cn
  • Supported by:
    the National Key R & D Program of China(2016YFB0901500);the National Key R & D Program of China(2016YFB0101201);the National Natural Science Foundation of China(51771094)

Abstract:

With solar, wind, and other types of renewable energy incorporated into electrical grids and with the construction of smart grids, energy storage technology has become essential to optimize energy utilization. Due primarily to its abundance and low cost, aqueous rechargeable sodium-ion batteries (ARSBs) have received increasing attention in the field of electrochemical energy storage technology, and represent a promising alternative to energy storage in future power grids. However, because of the limitations of the thermodynamics of electrochemical processes in water, reactions in aqueous solution are more complicated compared to an organic system. Many parameters must be taken into account in an aqueous system, such as electrolyte concentration, dissolved oxygen content, and pH. As a result, it is challenging to select an appropriate electrode material, whose capacity, electrochemical potential, adaptability, and even catalytic effect may seriously affect the battery performance and hamper its application. Therefore, the development of advanced electrode materials, which can suppress side reactions of the battery and have good electrochemical performance, has become the focus of ARSB research. This paper briefly discusses the characteristics of ARSBs and summarizes the latest research progress in the development of electrode materials, including oxides, polyanionic compounds, Prussian blue analogues, and organics. This review also discusses the challenges remaining in the development of ARSBs, and suggests several ways to solve them, such as by using multivalent ions, hybridized electrolytes, etc., and speculates about future research directions. The studies and concepts discussed herein will advance the development of ARSBs and promote the optimization of energy utilization.

Key words: Aqueous sodium ion battery, Cathode material, Anode material, Electrolyte