A Polyamide Single-Ion Electrolyte Membrane for Application in Lithium-Ion Batteries

作者：Sun, Yubao; Rohan, Rupesh; Cai, Weiwei; Wan, Xifei; Pareek, Kapil; Lin, An; Yunfeng, Zhang; Cheng, Hansong^*

来源：Energy Technology, 2014, 2(8): 698-704.

DOI：10.1002/ente.201402041

• electrolyte
• ionic conductivity
• lithium-ion batteries
• membrane
• polyamide

A bis(sulfonyl) imide incorporated, high-molecular-weight gel single-ion polyamide polymer electrolyte (LiPA) is designed and synthesized by using a polycondensation reaction followed by exchange of H+ with Li+ ions. All the bis(sulfonyl) imide anions are immobilized in the polymer chains, which gives rise to a substantially higher lithium cation transference number of 0.88 than the corresponding values of conventional liquid-based electrolytes or dual-ion gel polymer electrolytes of inorganic salts, and also provides smooth channels for Li+ ion transport in the polymer matrix. A gel single-ion polymer electrolyte membrane, comprised of polyvinylidene fluoride (PVDF) and LiPA, is successfully prepared with an ionic conductivity of 3.8 +/- 10 +/- 4 Scm(-1) at room temperature, well suited for applications in lithium-ion batteries. Good battery performance of the membrane is demonstrated in an assembled Li-ion battery cell at both room temperature and at elevated temperature.

• 出版日期2014-8
• 单位中国地质大学（北京）