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Updated: May 2, 2026
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Suppressing concentration polarization in lithium battery composite polymer electrolytes via piezo-assisted
Jia-Yi Yin1, Likun Chen2,3, Guanyou Xiao2,3
1Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, P. R. China.
None:
The inherent limitation of Li+ transport and resulting severe concentration polarization in solid-state electrolytes have hindered the practical application of lithium metal batteries. Addressing this challenge, here we create a piezoelectric polymeric composite electrolyte based on poly(vinylidene fluoride) blended with 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3, which exploits volume fluctuations of lithium metal negative electrodes during cycling to activate a piezo-assisted electromechanical coupling effect. The resulting gradient piezo-field within the prepared electrolyte selectively accelerates Li+ while impedes anions movement, thereby effectively suppressing concentration polarization fundamentally. Consequently, the prepared electrolytes exhibit relatively low concentration polarization, enabling a high critical current density of 3.7 mA cm-2, stable Li plating/stripping even at high current density of 2 mA cm-2, and prolonged cycling stability of Li | |Ni0.8Co0.1Mn0.1O2 full cell over 2600 times at the specific current of 900 mA g-1 within a potential window of 2.8 to 4.5 V. This work proposes a mechanical-electrochemical conversion strategy by constructing a piezoelectric electrolyte that actively utilizes the unavoidable volume fluctuation of lithium metal to minimize Li+ concentration gradient, offering a promising pathway towards high-performance lithium metal batteries.
