关键词: 钠离子电池, 正极, 负极, 电解质

Abstract: Na-ion battery is one of the possible replacements for Li-ion battery for energy storage，due to its high energy density，high safety，and low cost. In this paper，research progress of Na-ion batteries is reviewed，including preparation and electrochemical performance of positive electrodes，negative electrodes and electrolytes. Positive electrodes include oxides，phosphates. Negative electrodes include carbon based-anodes，titanium based-anodes and alloy anodes. Electrolytes include organic electrolytes and gel polymer electrolytes. The advantages and limitations of materials are presented. Na-ion secondary battery could gradually replace Li-ion battery，and the present main problem is matching of different system materials.

Key words: Na-ion battery, positive electrode, negative electrode, electrolyte