Ke Yang, Jiabin Ma, Yuhang Li, Junyu Jiao, Shizhe Jiao, Xufei An, Guiming Zhong, Likun Chen, Yuyuan Jiang, Yang Liu, Danfeng Zhang, Jinshuo Mi, Jie Biao, Boyu Li, Xing Cheng, Shaoke Guo, Yuetao Ma, Wei Hu, Shichao Wu, Jiaxin Zheng, Ming Liu, Yan-Bing He, Feiyu Kang
Poly(vinylidene fluoride) (PVDF)-based solid electrolytes with a Li salt-polymer-little residual solvent configuration are promising candidates for solid-state batteries. Herein, we clarify the microstructure of PVDF-based composite electrolyte at the atomic level and demonstrate that the Li+ -interaction environment determines both interfacial stability and ion-transport capability. The polymer works as a "solid diluent" and the filler realizes a uniform solvent distribution. We propose a universal strategy of constructing a weak-interaction environment by replacing the conventional N , N -dimethylformamide (DMF) solvent with the designed 2,2,2-trifluoroacetamide (TFA)...
April 1, 2024: Journal of the American Chemical Society