DHP (Dimethyl (hydroxymethyl)phosphonate, DEHMP, >99.0%) as Electrolyte Additive for Aqueous Zinc Ion Battery, 25-100 g/bottle, CAZIBEADHP

DHP (Dimethyl (hydroxymethyl)phosphonate, C3H9O4P) is a functional organophosphorus compound featuring both a polar phosphonate ester group and a hydroxyl group. When evaluated as an electrolyte additive or co-solvent component in Aqueous Zinc-Ion Batteries (AZIBs), it operates via targeted solvation sheath restructuring and interfacial passivation.

Its key functional roles in AZIB are shown below: (1) Solvation Shell Engineering & Water Activity Suppression: The oxygen atoms in the phosphoryl (P=O) and hydroxyl (-OH) groups possess a high electron-donor capability, allowing DHP molecules to strongly coordinate with Zn^{2+} ions. By entering the primary or secondary coordination sphere of zinc ions, DHP displaces free water molecules, significantly reducing bulk water activity. This suppression mitigates parasitic side reactions like the Hydrogen Evolution Reaction (HER) and zinc corrosion. (2) In-Situ Artificial SEI / Protective Interphase Formation: Phosphonate-based molecules exhibit high adsorption energy and chemical affinity toward zinc metal surfaces. During initial cycling, DHP participates in constructing an artificial, robust Solid Electrolyte Interphase (SEI) rich in inorganic-organic hybrid zinc-phosphonate and phosphate species. This passivating layer blocks direct contact between the active zinc substrate and aqueous solution. (3) Uniform Zn^{2+} Flux and Dendrite Suppression: The localized surface film promotes uniform ionic adsorption sites, homogenizing the local electric field and Zn^{2+} flux distribution. This prevents localized tip growth, ensuring smooth, highly reversible, and dendrite-free zinc plating/stripping.

Part Number	CAZIBEADHP (C-AZIB-EA-DHP)
CAS	24630-67-9
Chemical Formula/Structure	C3H9O4P
Appearance	Colorless Liquid
Molar Mass	140.08 g/mol
Package Grade	25 g, 50 g, and 100 g/bottle

Notes: (1) Please store the DHP liquid in a dry area (glovebox or dryroom is preferred)

References: 

1. H. Tan, et al. Decoupling of Ion-Solvent Interactions via Compartmentalized Molecular Design for Ultra-Stable Aqueous Zinc Batteries, Adv. Funct. Mater., 2026, 36, e16270
2. P. J. Chimtali, et al. Interface Engineering via the Use of Anion Additive Coupled with Dual Solvent for Aqueous Zinc Ion Batteries, Batteries & Supercaps, 2026, 9, e202500758