0 引言
1 实验部分
1.1 实验材料及仪器
1.2 PEI-AMPSLi合成
1.3 PAN/PEI-AMPSLi纳米纤维膜制备
1.4 聚合物电解质制备及电池组装
1.5 测试方法
2 结果与讨论
Fig. 1 The Michael addition reaction mechanism of PEI and AMPS图1 PEI和AMPS迈克尔加成反应机理 |
Fig. 2 (a) 1H NMR analysis of PEI and PEI-AMPSLi; (b) peak area integration of PEI-AMPSLi图2 (a)PEI和PEI-AMPSLi的核磁氢谱;(b)PEI-AMPSLi峰面积积分 |
Fig. 3 SEM image of PAN/PEI-AMPSLi membranes before (a) and after (c) electrolyte uptake; (b) histograms of fiber diameter distribution in the membrane before electrolyte uptake图3 PAN/PEI-AMPSL纳米纤维膜吸液前(a)和吸液后(c)的扫描电子显微镜图;(b)吸液前纳米纤维直径统计直方图 |
Fig. 4 (a) TGA curves of PEI, PEI-AMPSLi and PAN/PEI-AMPSLi; (b) DSC curves of PAN/PEI-AMPSLi图4 (a)PEI、PEI-AMPSLi和PAN/PEI-AMPSLi的热重分析曲线;(b)PAN/PEI-AMPSLi的差示热扫描测试曲线 |
Fig. 5 The stress-strain curves of PAN and PAN/PEI-AMPSLi图5 PAN和PAN/PEI-AMPSLi的应力应变曲线 |
Fig. 6 Relationship curve of temperature and ionic conductivities of PAN/PEI- AMPSLi electrolyte by fitting图6 PAN/PEI-AMPSLi电解质离子电导率与温度关系拟合曲线 |
Fig. 7 (a) The linear sweep voltammetry curves of PAN/PEI-AMPSLi electrolyte; (b) time-dependent response of DC polarization for the Li/PAN/PEI-AMPSLi electrolyte/Li symmetric cell (inset is enlarged profile and EIS plots before and after polarization)图7 (a)PAN/PEI-AMPSLi电解质的线性扫描伏安曲线;(b)PAN/PEI-AMPSLi聚合物电解质极化响应电流随时间变化的曲线(内图为极化前后锂对称电池的阻抗谱图) |
Fig. 8 (a) Charge/discharge profiles at varying rates of PAN/PEI-AMPSLi electrolyte; (b) rate performance of PAN/PEI-AMPSLi electrolyte图8 (a)PAN/PEI-AMPSLi电解质在不同倍率下的充放电曲线;(b)倍率性能 |
Fig. 9 Long-term cycling performance at 0.5 C and room temperature: (a) Li/NCM811 half-cell; (b) NCM811/graphite full cell图9 0.5 C室温下电池长循环性能:(a)Li/NCM811半电池;(b)NCM811/石墨全电池 |