@article{27589, author = {Yuyan Shao and Nav Nidhi Rajput and Jianzhi Hu and Mary Hu and Tianbiao Liu and Zhehao Wei and Meng Gu and Xuchu Deng and Suochang Xu and Kee Sung Han and Jiulin Wang and Zimin Nie and Guosheng Li and Kevin R Zavadil and Jie Xiao and Chongmin Wang and Wesley A Henderson and Ji-Guang Zhang and Yong Wang and Karl T Mueller and Kristin A Persson and Jun Liu}, title = {Nanocomposite polymer electrolyte for rechargeable magnesium batteries}, abstract = {

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(BH4)2 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(BH4)2 and thus improve the electrochemical performance. The insights and design metrics thus obtained may be used in nanocomposite electrolytes for other multivalent systems.

}, year = {2015}, journal = {Nano Energy}, volume = {12}, pages = {750-759}, month = {03/2015}, isbn = {22112855}, doi = {10.1016/j.nanoen.2014.12.028}, language = {eng}, }