How Water Accelerates Bivalent Ion Diffusion at the Electrolyte/Electrode Interface
Abstract
The effect of H2O in electrolytes and in electrode lattices on the thermodynamics and kinetics of reversible multivalent‐ion intercalation chemistry based on a model platform of layered VOPO4 has been investigated. The presence of H2O at the electrolyte/electrode interface plays a key role in assisting Zn2+ diffusion from electrolyte to the surface, while H2O in the lattice structure alters the working potential. More importantly, a dynamic equilibrium between bulk electrode and electrolyte is eventually reached for H2O transport during the charge/discharge cycles, with the water activity serving as the key parameter determining the direction of water movement and the cycling stability.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 20, 2018
- Source ID
- 10.1002/anie.201806748
Entities
People
- Chunsheng Wang
- Enyuan Hu
- Fei Wang
- Kang Xu
- Tao Gao
- Wei Sun
- Xiao Ji
- Xiao‐qing Yang
- Zulipiya Shadike
Organizations
- Brookhaven National Laboratory
- United States Army Research Laboratory
- University of Maryland