TY - JOUR
AU - Yuyan Shao
AU - Nav Nidhi Rajput
AU - Jianzhi Hu
AU - Mary Hu
AU - Tianbiao Liu
AU - Zhehao Wei
AU - Meng Gu
AU - Xuchu Deng
AU - Suochang Xu
AU - Kee Sung Han
AU - Jiulin Wang
AU - Zimin Nie
AU - Guosheng Li
AU - Kevin R Zavadil
AU - Jie Xiao
AU - Chongmin Wang
AU - Wesley A Henderson
AU - Ji-Guang Zhang
AU - Yong Wang
AU - Karl T Mueller
AU - Kristin A Persson
AU - Jun Liu
AB - <p>Nanocomposite polymer electrolytes present new opportunities for rechargeable magnesium batteries. However, few polymer electrolytes have demonstrated reversible Mg deposition/dissolution and those that have still contain volatile liquids such as tetrahydrofuran (THF). In this work, we report a nanocomposite polymer electrolyte based on poly(ethylene oxide) (PEO), Mg(BH<sub>4</sub>)<sub>2</sub> and MgO nanoparticles for rechargeable Mg batteries. Cells with this electrolyte have a high coulombic efficiency of 98% for Mg plating/stripping and a high cycling stability. Through combined experiment-modeling investigations, a correlation between improved solvation of the salt and solvent chain length, chelation and oxygen denticity is established. Following the same trend, the nanocomposite polymer electrolyte is inferred to enhance the dissociation of the salt Mg(BH<sub>4</sub>)<sub>2</sub> and thus improve the electrochemical performance. The insights and design metrics thus obtained may be used in nanocomposite electrolytes for other multivalent systems.</p>
BT - Nano Energy
DA - 03/2015
DO - 10.1016/j.nanoen.2014.12.028
LA - eng
N2 - <p>Nanocomposite polymer electrolytes present new opportunities for rechargeable magnesium batteries. However, few polymer electrolytes have demonstrated reversible Mg deposition/dissolution and those that have still contain volatile liquids such as tetrahydrofuran (THF). In this work, we report a nanocomposite polymer electrolyte based on poly(ethylene oxide) (PEO), Mg(BH<sub>4</sub>)<sub>2</sub> and MgO nanoparticles for rechargeable Mg batteries. Cells with this electrolyte have a high coulombic efficiency of 98% for Mg plating/stripping and a high cycling stability. Through combined experiment-modeling investigations, a correlation between improved solvation of the salt and solvent chain length, chelation and oxygen denticity is established. Following the same trend, the nanocomposite polymer electrolyte is inferred to enhance the dissociation of the salt Mg(BH<sub>4</sub>)<sub>2</sub> and thus improve the electrochemical performance. The insights and design metrics thus obtained may be used in nanocomposite electrolytes for other multivalent systems.</p>
PY - 2015
SN - 22112855
SP - 750
EP - 759
T2 - Nano Energy
TI - Nanocomposite polymer electrolyte for rechargeable magnesium batteries
VL - 12
ER -