@article{Liu2024, 
author = {Shiwei Liu and Jing Wang and Keqi Wu and Zhirong Yang and Yan Dai and Junmei Zhang and Wenjia Wu and Jingtao Wang},
title = {Lamellar quasi-solid electrolyte with nanoconfined deep eutectic solvent for high-performance lithium battery},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {7},
pages = {6176-6183},
keywords = {quasi-solid electrolyte, deep eutectic solvent, lamellar structure, lithium-ion transference number, solvation shell},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6620-7},
doi = {10.1007/s12274-024-6620-7},
abstract = {Electrolytes with high-efficiency lithium-ion transfer and reliable safety are of great importance for lithium battery. Although having superior ionic conductivity (10−3–10−2 S·cm−1), traditional liquid-state electrolytes always suffer from low lithium-ion transference number ( tLi+, < 0.4) and thus undesirable battery performances. Herein, the deep eutectic solvent (DES) is vacuum-filtered into the ~ 1 nm interlayer channel of vermiculite (Vr) lamellar framework to fabricate a quasi-solid electrolyte (Vr-DES QSE). We demonstrate that the nanoconfinement effect of interlayer channel could facilitate the opening of solvation shell around lithium-ion. Meanwhile, the interaction from channel wall could inhibit the movement of anion. These enable high-efficiency lithium-ion transfer: 2.61 × 10−4 S·cm−1 at 25 °C. Importantly, the  tLi+ value reaches 0.63, which is 4.5 times of that of bulk DES, and much higher than most present liquid/quasi-solid electrolytes. In addition, Vr-DES QSE shows significantly improved interfacial stability with Li anode as compared with DES. The assembled Li symmetric cell can operate stably for 1000 h at 0.1 mA·cm−2. The lithium iron phosphate (LFP)|Vr-DES QSE|Li cell exhibits high capacity of 142.1 mAh·g−1 after 200 cycles at 25 °C and 0.5 C, with a capacity retention of 94.5%. The strategy of open solvation shell through nanoconfinement effect of lamellar framework may shed light on the development of advanced electrolytes.}
}