非水系钠离子电池的电解质研究进展

马梦莹, 潘慧霖, 胡勇胜

Progress in electrolyte research for non-aqueous sodium ion batteries

Mengying MA, Huilin PAN, Yongsheng HU

图3 (a) 钠‖石墨半电池在1 mol/L NaOTf-DEGDME中的充放电曲线[32]；(b) 石墨在NaPF6/EC:DEC中和NaPF6/DEGDME电解液中的储钠机理；(c) Na+与DEGDME溶剂在石墨层间共嵌过程的红外光谱分析，(d) 放电后和(e)充电后天然石墨的晶格距离，(f)钠‖石墨半电池在不同醚基电解液中的dQ/dV曲线(插图: 溶剂分子示意图)[33]

Fig.3 (a) charge/discharge characteristics of Na||graphite cells cycled in 1 mol/L NaOTf/DEGDME[32]; (b) schematic of sodium storage in natural graphite using NaPF6 in EC:DEC and NaPF6 in DEGDME electrolytes, (c) FTIR analysis for the Na+ and DEGDME co-intercalation process in graphite, HR-TEM images of natural graphite samples (d) after discharge and (e) after charge back, (f) dQ/dV profiles of Na||graphite half cells in ether-based electrolytes with different length of ether molecules (inset: schematic of ether molecules)[33]