Wang Zhiqun, Tian Shaokang, Li Shangda, Li Lei, Yin Yimei, Ma Zifeng
School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University Shanghai 200240 China
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiaotong University Shanghai 200240 China.
RSC Adv. 2018 May 31;8(36):20025-20031. doi: 10.1039/c8ra02122h. eCollection 2018 May 30.
Lithium sulfonate-grafted poly(vinylidenefluoride-hexafluoro propylene) P(VDF-HFP) ionomers are synthesized through covalent attachment of taurine and used as binder for the LiFePO cathode of lithium-ion batteries(LIBs). The incorporation of the ionomer binders will add ionic conducting channels inside the electrodes, and prevent electrolyte depletion during rapid charge-discharge processes. It leads to an improved performance of LIBs using the ionomer binders including cycling stability and rate capability compared to that of LIBs using non-ionic binders (PVDF and PVDF-HFP). Therefore, the lithium sulfonate-grafted P(VDF-HFP) ionomers offer a new route to develop high-power LIBs.
通过共价连接牛磺酸合成了磺酸锂接枝的聚（偏二氟乙烯-六氟丙烯）P（VDF-HFP）离聚物，并将其用作锂离子电池（LIBs）磷酸铁锂正极的粘结剂。离聚物粘结剂的加入将在电极内部增加离子传导通道，并防止在快速充放电过程中电解液耗尽。与使用非离子粘结剂（PVDF和PVDF-HFP）的LIBs相比，使用离聚物粘结剂的LIBs性能得到改善，包括循环稳定性和倍率性能。因此，磺酸锂接枝的P（VDF-HFP）离聚物为开发高功率LIBs提供了一条新途径。
