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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
Decoupling Surface Rigidity from Bulk Compliance in Elastomeric Electrolytes via Surface-Architected MXene Interphase
Zhisong Geng1, Yun Xing1, Chenxi Cao1
1MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P. R. China.
Abstract:
Elastomeric electrolytes provide intimate interfacial contact but lack sufficient mechanical strength to suppress lithium dendrites. We address this trade-off via surface-architected MXene interphase engineering on a hydrogenated nitrile butadiene rubber (HNBR) matrix. The high-modulus (1.5 GPa) surface layer mechanically suppresses dendrite protuberance via stress redistribution, while the compliant bulk preserves conformal contact. Concurrently, a lithiophilic, oriented MXene network promotes uniform ion flux, affording an ionic conductivity of 8.05 × 10-4 S cm-1 and enhanced Li+ transport relative to the pristine matrix. This mechano-ionic coupling enables dendrite-free cycling exceeding 7000 h and stable full-cell operation with high-loading LiFePO4 (1.81 mAh cm-2) and high-voltage NCM622 (4.3 V). This interphase engineering strategy establishes surface-bulk mechanical decoupling as a generalizable design principle for developing high-energy-density, flexible lithium-metal batteries.
