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<p>The determination of lithium in spodumene, a mineral of lithium, and a number of materials used in lithium-ion battery by <sup>7</sup>Li(p,α)<sup>4</sup>He nuclear reaction is described. The reaction is induced by 600&#xa0;keV protons while the α-ejectiles are detected at 150° emission angle by a surface barrier detector. A mylar foil of ~ 10 micron thickness is used as a stopper foil to prevent the detection of backscattered protons and the α-ejectiles from X(p,α) reactions (<i>X</i> = B, N, O or F) occurring simultaneously with the <sup>7</sup>Li(p,α)<sup>4</sup>He nuclear reaction. Specimen-silver powder mixtures serve as the targets. The comparator approach is used for quantitation. It employs a linear calibration plot constructed over 1–9.5 wt.% <sup>7</sup>Li using lithium carbonate powder standards. The precision of the determinations is 1–3% while the combined uncertainty is &lt; 8%. Homogeneity of targets and the choice of stopping cross sections of the materials are crucial for determinations with good analytical attributes. Non-destructive nature, rapidity, amenability to both bulk solid matrices and coatings and superior analytical merits make this method suitable for the routine determination of Li in materials.</p>

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From minerals to the electrodes of lithium-ion battery: facile and precise determination of lithium by 7Li(p,α)4He nuclear reaction

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  • 发表日期：

    2025年8月2日

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  • Yerroju Sunitha,
  • D. V. Lakshmipathy,
  • Sk Jayabun,
  • G. L. N. Reddy

摘要

The determination of lithium in spodumene, a mineral of lithium, and a number of materials used in lithium-ion battery by 7Li(p,α)4He nuclear reaction is described. The reaction is induced by 600 keV protons while the α-ejectiles are detected at 150° emission angle by a surface barrier detector. A mylar foil of ~ 10 micron thickness is used as a stopper foil to prevent the detection of backscattered protons and the α-ejectiles from X(p,α) reactions (X = B, N, O or F) occurring simultaneously with the 7Li(p,α)4He nuclear reaction. Specimen-silver powder mixtures serve as the targets. The comparator approach is used for quantitation. It employs a linear calibration plot constructed over 1–9.5 wt.% 7Li using lithium carbonate powder standards. The precision of the determinations is 1–3% while the combined uncertainty is < 8%. Homogeneity of targets and the choice of stopping cross sections of the materials are crucial for determinations with good analytical attributes. Non-destructive nature, rapidity, amenability to both bulk solid matrices and coatings and superior analytical merits make this method suitable for the routine determination of Li in materials.