@article{Song2026, 
author = {Liubin Song and Yiyu Xiong and Xingli Xiao and Zhongliang Xiao and Tianyuan Long and Daoxin Wu and Yinjie Kuang and Xue Wen and Tingting Zhao and Fulu Chu},
title = {Constructing efficient ion transport channels via the “highway effect”: Rational optimization of PVDF-based solid-state electrolytes through organic–inorganic composite doping},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {7},
pages = {94908656},
keywords = {composite solid-state electrolyte, polyvinylidene fluoride, three-dimensional ion transport channel, modified nano-silica (Mod-SiO2)},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908656},
doi = {10.26599/NR.2026.94908656},
abstract = {Polyvinylidene fluoride (PVDF)-based solid polymer electrolytes (SPEs) show great potential for solid-state lithium metal batteries (SSLMBs) due to their high ionic conductivity, wide electrochemical window, and cost-effectiveness. However, they suffer from low room-temperature ionic conductivity and poor electrode–electrolyte interfacial compatibility, limiting their practical application. Herein, an organic–inorganic synergistic modification strategy is proposed that hexadecyltrimethoxysilane (HDTMS)-modified nano-silica (Mod-SiO2) is incorporated into a PVDF/polyacrylonitrile (PAN)/lithium salts blend to fabricate a composite solid electrolyte (PVDF/PAN/lithium salt/Mod-SiO2 (PPLS) composite system). Specifically, PAN facilitates PVDF molecular chains’ motion to enhance segmental mobility, while uniformly dispersed Mod-SiO2 constructs continuous three-dimensional (3D) Li+ transport channels. This synergistic “ion-transport highway” effect boosts Li+ mobility and optimizes dispersion uniformity, ionic conductivity, and interfacial stability. At room temperature, the PPLS exhibits an ionic conductivity of 4.83 × 10−4 S·cm−1, a Li+ transference number of 0.7, and an extended electrochemical window of 5.1 V. LiFePO4|PPLS|Li batteries retain 80.9% capacity retention after 1000 cycles, with a Coulombic efficiency of 99.3%. This work provides valuable insights for the rational design and optimization of PVDF-based SPEs and advances the practical development of high-safety SSLMBs.}
}