Cobalt oxalate

Cobalt oxalate

Oxide Based Supercapacitors II-Other Oxides

Published in Ling Bing Kong, Nanomaterials for Supercapacitors, 2017

Ling Bing Kong, Wenxiu Que, Lang Liu, Freddy Yin Chiang Boey, Zhichuan J. Xu, Kun Zhou, Sean Li, Tianshu Zhang, Chuanhu Wang

The precursors, i.e., cobalt oxalate nanostructures, were synthesized by using a water-controlled precipitation process [33]. Two routes, namely, (i) water/stock solution route and (ii) stock solution/ water route, were employed for the one-step synthesis of the 1D cobalt oxalate nanostructures. The stock solutions were prepared by dissolving oxalic acid (H2C2O4) and cobalt chloride hexahydrate (CoCl2·6H2O) with an equal mole ratio in either N,N-dimethylacetamide (DMA) or dimethyl sulfoxide (DMSO), to form transparent blue solutions. In this case, water as the precipitation reagent.

Hydrometallurgical recovery of critical metals from spent Li-ion batteries using simple leaching-precipitation techniques

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Journal Information

Published in Geosystem Engineering, 2023

Dilip Kumar Rajak, Chandan Guria, Laldeep Gope, Jahir Ahamad Jibran

The effect of oxalate ion addition on cobalt precipitation was examined by varying its dosage with respect to the stoichiometric of C2O42– : Co2+ in the range of 1 to 1.5 at a moderate temperature of 50°C, 300 rpm, and time one hour. Figure 8 shows the effect of the molar ratio of the oxalate ions to Co2+ on the precipitation recovery of cobalt oxalate and indicates that a 10% excess of the stoichiometric quantity of oxalate ions (i.e., C2O42– : Co2+ = 1.1) yielded ~ 99% precipitation efficiency of cobalt with a purity of >99.3%.

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Oxide Based Supercapacitors II-Other Oxides

Hydrometallurgical recovery of critical metals from spent Li-ion batteries using simple leaching-precipitation techniques