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Bionic Topology Reconstruction Drives Confined Competitive Ligand-Exchange Hopping Dynamics in Hydrogel Electrolytes to Achieve High-Performance Structural Zn-Ion Batteries
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Z
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韩
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DOI：10.1016/j.ensm.2026.105446.png)
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Abstract
En 中文
Developing hydrogel electrolytes with both high ionic conductivity and mechanical robustness remains a core challenge for structural batteries. Inspired by scorpion slit sensilla, we propose a stretch-induced topological reconfiguration strategy to achieve a highly uniaxial synergistic orientation of silver nanowires and Ti3C2Tx MXene within a polyacrylamide hydrogel (S-OAMP), building ordered 1D confined nanochannels. Within this confined framework, a confined competitive ligand-exchange hopping (C-CLEH) mechanism is revealed. This mechanism thermodynamically disrupts the conventional hydration steady state by generating a binding energy of ΔG=-5.8 kJ mol-1, driving a transition of Zn2+ from 3D random diffusion to 1D directional transport featuring a low energy barrier of Ea=29.8 kJ mol-1. The S-OAMP electrolyte delivers a superior ionic conductivity of 52.9 mS cm-1 and a high Zn2+ transference number of 0.89. Compounded with carbon fibers, under varying tensile loads, the transverse contraction of S-OAMP driven by the anisotropic Poisson effect radially compresses the 1D channels, achieving a remarkable discharge capacity recovery of nearly two-thirds and further validating the applicability of the C-CLEH mechanism. Structural batteries retain 81.9% capacity over 1400 cycles, and Zn||Zn symmetric cells endure prolonged cycling exceeding 2600 hours. The C-CLEH mechanism provides a new paradigm for designing high-load-bearing, long-lifespan solid-state energy materials.
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