Attempts to the electrodeposition of Nd from ionic liquids at elevated temperatures

Kondo, Hitomi; Matsumiya, Masahiko; Tsunashima, Katsuhiko; Kodama, Shun

doi:10.1016/j.electacta.2012.01.101

Cited by 84 publications

(57 citation statements)

References 28 publications

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“…This anodic behavior indicates that the oxidation reaction is an irreversible process and this result is consistent with our related reports on TFSA-based ILs [9,12,13].…”

Section: Spectroscopic Analysissupporting

confidence: 94%

“…Wavenumber / 10 3 cm (1) and (2), respectively, because we have already revealed that the reduction reaction of [Nd(TFSA) 5 ] 2À proceeded in TFSA-based ILs [9]. ½NdðNO 3 Þ a ðTFSAÞ 5Àa 2À þ 3e À !…”

Section: Spectroscopic Analysismentioning

confidence: 97%

“…There are some reports about the electrochemical behavior and electrodeposition of RE elements such as La, Sm, Eu and Yb [7,8] in ILs. We have already demonstrated that the recovery process of Nd [9][10][11] and Dy [12,13] metals by electrodeposition using quaternary phosphonium and ammonium-based ILs, such as triethyl-pentyl-phosphonium bis(trifluoromethyl-sulfonyl)amide, [P 2225 ] [TFSA], and 2-hydroxy ethyl-trimethyl-ammonium bis(trifluoromethyl-sulfonyl)amide, [N 1112OH ] [TFSA]. In addition to the electrodeposition process using ILs, the wet separation process has been recently indispensable for the recycling of spent Nd-Fe-B magnets.…”

Section: Introductionmentioning

confidence: 95%

“…Especially, solvent extraction and precipitation separation are effective wet separation processes. Therefore, we have proposed the combination process constituting a wet separation, such as solvent extraction [14][15][16] or precipitation separation [17,18], with electrodeposition [9][10][11][12][13]. Moreover, it is also important to develop recycling processes from the viewpoint of low cost.…”

Section: Introductionmentioning

confidence: 99%

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Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

2015

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“…This anodic behavior indicates that the oxidation reaction is an irreversible process and this result is consistent with our related reports on TFSA-based ILs [9,12,13].…”

Section: Spectroscopic Analysissupporting

confidence: 94%

Section: Spectroscopic Analysismentioning

confidence: 97%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

2015

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“…Therefore, in order to develop an efficient recovery process, we have proposed the recovery of metallic REs by direct electrodeposition from an IL phase after the extraction process. We have already demonstrated that Nd [9][10][11] and Dy [12,13] metals can be recovered by electrodeposition using an IL as an electrolyte. In the case of recovering RE metals from the wastes such as spent Nd-Fe-B magnets, the combined processes for extraction and electrodeposition are expected to purify RE metals from trace elements and simplify the total recycling process.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Rare Earth Ions from Nd-Fe-B Magnet Wastes with TBP in Tricaprylmethylammonium Nitrate

Kikuchi

Matsumiya

Kawakami

2014

SERDJ

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Rare earth (RE) ions such as Pr(III), Nd(III) and Dy(III) derived from spent Nd-Fe-B magnets were extracted from an aqueous phase containing nitrate ions by tri-n-butyl phosphate (TBP) with an ionic liquid (IL), tricaprylmethylammonium nitrate ([A336][NO 3 ]). It was confirmed that the extraction of RE(III) was enhanced by adding NaNO 3 into the aqueous phase and continuous extraction by a batch system led to Nd(III) enrichment in the IL phase. When using Nd-Fe-B magnet wastes including iron oxide, a wet separation process was required for removal of the iron from a solution in which the metal ions were leached. The process led to a relatively low RE(III) concentration in the prepared solution due to an increase in its volume by adding base for precipitation of Fe(OH) 3 . RE(III) recovered from wastes in the absence of iron oxide by a dry separation process were more concentrated in nitric acid. With the feed solution as the aqueous phase, Nd(III) was distributed significantly into the IL phase through repeated extractions.

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Unravelling the Role of Speciation in Glyme:Ionic Liquid Hybrid Electrolytes for Na−O₂ Batteries

Garcia-Quintana

Chen

Ortiz‐Vitoriano

et al. 2020

Batteries & Supercaps

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The morphology and size of the discharge products in Na−O2 batteries are largely dominated by the interactions of the electrolyte with superoxide and sodium ions; therefore, an in‐depth understanding is essential for achieving high performance batteries. Herein, we report a framework designed to understand solvation and coordination in the recently discovered hybrid electrolytes, based on glyme and a pyrrolidinium ionic liquid. FTIR and NMR spectroscopic techniques, coupled with molecular dynamics simulations, have been used to characterize these systems. We demonstrate that the presence of ionic liquid in the hybrid electrolyte affects the superoxide coordination environment by weakening the glyme‐Na+ interactions, and generating solvent separated ion pairs. All these factors lead to different deposition mechanisms, which will determine the battery performance. The Na+ solvation shell compositions, anion conformers and relative free glyme content are also evaluated. The combinatorial approach used in this study‐experimental and computational – can be applied for further design of these hybrid electrolytes and other metal – O2 chemistries and electrochemical systems.

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Attempts to the electrodeposition of Nd from ionic liquids at elevated temperatures

Cited by 84 publications

References 28 publications

Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

Extraction of Rare Earth Ions from Nd-Fe-B Magnet Wastes with TBP in Tricaprylmethylammonium Nitrate

Unravelling the Role of Speciation in Glyme:Ionic Liquid Hybrid Electrolytes for Na−O₂ Batteries

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Attempts to the electrodeposition of Nd from ionic liquids at elevated temperatures

Cited by 84 publications

References 28 publications

Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

Solvation and electrochemical analyses of neodymium complexes in TFSA-based ionic liquids dissolving the nitrates synthesized from spent Nd–Fe–B magnets

Extraction of Rare Earth Ions from Nd-Fe-B Magnet Wastes with TBP in Tricaprylmethylammonium Nitrate

Unravelling the Role of Speciation in Glyme:Ionic Liquid Hybrid Electrolytes for Na−O2 Batteries

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Unravelling the Role of Speciation in Glyme:Ionic Liquid Hybrid Electrolytes for Na−O₂ Batteries