Zinc oxalate

Catalog NumberACM547682-2

CAS Number547-68-2

CategoryLow-Valence Transition Metal Additive

Synonyms	Zinc oxalate hydrate
IUPAC Name	Oxalic acid;zinc
Molecular Weight	155.4
Molecular Formula	C2H₂O4Zn
SMILES	C(=O)(C(=O)O)O.[Zn]
InChI	InChI=1S/C2H₂O4.Zn/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);
InChI Key	PDDIPIDVUPWUML-UHFFFAOYSA-N
Purity	99%+
Appearance	White solid

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Case Study

Enhancing PMMA Flame Retardancy with Zinc Oxalate and Carbon Nanotube Synergy

Park, Sun Mi, et al. Macromolecular Research 24.9 (2016): 777-781.

In this study, an environmentally friendly flame retardant system was developed using zinc oxalate nanoparticles combined with multi-walled carbon nanotubes (MWNTs) as synergistic additives for poly(methyl methacrylate) (PMMA) nanocomposites. This approach leverages the complementary mechanisms of both materials to enhance fire resistance.
Preparation: Zinc oxalate nanoparticles was prepared by reacting 1M zinc acetate and 1M oxalic acid at 70 ˚C, then filtered, washed, and vacuum dried. PMMA nanocomposites were synthesized by solution blending in DMF, with the addition of both zinc oxalate (0.415g) and MWNTs (0.025g) through sequential dispersion and sonication steps, followed by vacuum drying at 120 ˚C.
Key Results:
· The zinc oxalate/MWNT system provided improved fire performance, with increased LOI, significantly lower PHRR, and stable protective char layers formed during combustion.
· The synergistic flame retardant mechanism between zinc oxalate and MWNTs combines a physical barrier and chemical gas-phase action: MWNTs are driven to the surface by combustion forces to form a protective network that inhibits oxygen ingress and fuel vapor release, while zinc oxalate undergoes endothermic decomposition-absorbing heat, converting to zinc oxide, and releasing CO/CO2 gases that dilute oxygen and flammable volatiles at the flame front.

Zinc Oxalate Dihydrate as a Precursor for High-Performance Li-ion Battery Anodes

Yudha, Cornelius Satria, et al. Energies 14.18 (2021): 5980.

The zinc oxalate dihydrate (ZnC2O4·2H2O) was employed as a precursor for a ZnO material by a facile controlled thermal decomposition reaction. By the heat treatment at a variable temperature, zinc oxide (ZnO) was characterized as a free anode material in LIBs as well as for its potential to enhance the performance of a commercial graphite anode.
Methodology: The zinc oxalate precursor was thermally decomposed at temperatures ranging from 200°C to 800°C for 4 hours in atmospheric air to produce ZnO. The resulting materials were comprehensively characterized using XRD, SEM, and FTIR. Electrochemical performance was evaluated in two configurations: pure ZnO anodes and ZnO/graphite composites (1:4 ratio) paired with LiNi0.6Mn0.2Co0.2O2 cathodes in full cells with carefully balanced mass loadings and n/p ratios.
Key Results:
· Material Characteristics: XRD of all the samples prepared at a high temperature (>400 °C) show the formation of pure wurtzite phase of ZnO. SEM-EDX revealed micron-sized particle morphology of ZnO. Optimal crystallinity and phase purity achieved at 600°C.
· Electrochemical Performance: Pure ZnO anodes delivered discharge capacity of 356 mAh/g. ZnO/graphite composites demonstrated enhanced capacity of 450 mAh/g. The composite anodes had better performance than the pure graphite electrode.
· The optimal synthesis temperature of 600°C balanced phase purity, crystallinity, and electrochemical activity, positioning zinc oxalate-derived ZnO as a valuable additive for improving commercial graphite anodes.

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