2022
DOI: 10.1007/s11581-022-04653-w
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Solvothermal controllable synthesis of polymorphic manganese oxalate anode for lithium-ion batteries

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“…An example is α-manganese oxalate dihydrate (α-MnC 2 O 4 • 2H 2 O), an organic salt hydrate with applications in energy storage and molecular adsorption. [16][17][18]22 As in Table 1, α-MnC 2 O 4 •2H 2 O crystals are mostly synthesized through the reactive crystallization of ions Mn 2+ and C 2 O 4 2− from aqueous solutions. 19−23 Typical precipitation conditions for α-MnC 2 O 4 • 2H 2 O include acidic pH (e.g., 3 or lower) and elevated temperatures (e.g., boiling aqueous solutions) or extended hours.…”
Section: Introductionmentioning
confidence: 99%
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“…An example is α-manganese oxalate dihydrate (α-MnC 2 O 4 • 2H 2 O), an organic salt hydrate with applications in energy storage and molecular adsorption. [16][17][18]22 As in Table 1, α-MnC 2 O 4 •2H 2 O crystals are mostly synthesized through the reactive crystallization of ions Mn 2+ and C 2 O 4 2− from aqueous solutions. 19−23 Typical precipitation conditions for α-MnC 2 O 4 • 2H 2 O include acidic pH (e.g., 3 or lower) and elevated temperatures (e.g., boiling aqueous solutions) or extended hours.…”
Section: Introductionmentioning
confidence: 99%
“…An example is α-manganese oxalate dihydrate (α-MnC 2 O 4 ·2H 2 O), an organic salt hydrate with applications in energy storage and molecular adsorption. , As in Table , α-MnC 2 O 4 ·2H 2 O crystals are mostly synthesized through the reactive crystallization of ions Mn 2+ and C 2 O 4 2– from aqueous solutions. Typical precipitation conditions for α-MnC 2 O 4 ·2H 2 O include acidic pH (e.g., 3 or lower) and elevated temperatures (e.g., boiling aqueous solutions) or extended hours. Although detailed reactor information is not fully available, some reported vigorous stirring. ,, The acidic reaction environment increases the operational safety risk and burden on wastewater treatment, as acid is not consumed by the reaction. Existing attempts at nonacidic pH for similar reactions often result in other hydrate forms, such as MnC 2 O 4 ·3H 2 O and/or γ-MnC 2 O 4 ·2H 2 O in Table . , In addition, extended hours seem to be necessary, as some studies mentioned MnC 2 O 4 ·3H 2 O precipitated first from mixing reactants and then converted to α-MnC 2 O 4 ·2H 2 O over time (red arrows in Figure ). MnC 2 O 4 ·3H 2 O was found to be less stable than α-MnC 2 O 4 ·2H 2 O from thermal decomposition analysis. , Further, most literature reports α-MnC 2 O 4 ·2H 2 O crystals in needle shapes , (Figure S1), while crystal size distribution has seldom been reported.…”
Section: Introductionmentioning
confidence: 99%
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