@article{Tian2019, 
author = {Meng Tian and Xiao Chen and Shengtong Sun and Dong Yang and Peiyi Wu},
title = {A bioinspired high-modulus mineral hydrogel binder for improving the cycling stability of microsized silicon particle-based lithium-ion battery},
year = {2019},
journal = {Nano Research},
volume = {12},
number = {5},
pages = {1121-1127},
keywords = {lithium-ion battery, polymer binder, mineral hydrogel, microsized silicon particle},
url = {https://www.sciopen.com/article/10.1007/s12274-019-2359-y},
doi = {10.1007/s12274-019-2359-y},
abstract = {Silicon with high specific capacity is deemed an ideal anode material for lithium ion batteries, which, however suffers from low cycling life due to its dramatic volume changes. Water-soluble polymer binders recently gain increasing attention by providing an eco-friendly and low-cost way in improving the cycling stability of Si-based anodes. Herein, a novel bioinspired supramolecular mineral hydrogel binder consisting of polyacrylic acid (PAA) physically crosslinked with amorphous calcium carbonate (ACC) nanoparticles is designed for high-performance anodes made from low-cost microsized Si particles. Owing to its organic-inorganic hydrophilic nature, ACC-PAA hybrid binder exhibits the reported highest modulus (~ 22 GPa) for polymer binders in electrolyte, even higher than lithiated Si species (Li15Si4, ~ 12 GPa). Together with its excellent adhesion and electrochemical stability, ACC-PAA binder can effectively suppress the pulverization of Si particles and maintain the mechanical integrity of electrodes during cycling. Therefore, even with a low binder content, the anode still shows an initial discharge capacity of 2, 973 mAh·g−1 and Coulombic efficiency of 81.5%, and retains 75% at a current density of 600 mA·g−1 after 100 cycles. The present organic-inorganic hybrid mineral binder may open a new approach for designing more effective polymer binders for Si-based lithium-ion batteries.}
}