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

摘要： 钠离子电池具有比能量高、安全性能好、价格低廉等优点，在储能领域有望成为锂离子电池的替代品。本文阐述了钠离子电池的研究现状，对钠离子电池研究的正负极材料、电解质的制备以及其电化学性能作了概述性讨论。正极材料有氧化物型、聚阴离子型；负极材料有碳基材料、钛基材料和合金负极材料等；电解液有有机溶剂电解液和凝胶聚合物电解液，并分别阐明了各种材料的优势和局限性。最后指出了这类高效钠二次电池体系有可能逐渐替代锂离子电池，并指明了现阶段发展钠离子的主要问题是不同体系材料的相互匹配。

关键词: 钠离子电池, 正极, 负极, 电解质