Low-boron-content lithium-boron alloy electrode material for lithium battery and application
An electrode material, lithium-boron alloy technology, applied in the field of energy batteries, can solve the problems of dendrites, poor safety, pulverization, etc., and achieve the effect of improving the electrochemical window, improving stability, and increasing the specific surface area and
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Embodiment 1
[0052] Lithium-boron alloy strips with a ratio of Li:B:Mg=88.55:9.9:1.55 are used as raw materials, which are named Li-B-Mg-1 here. Lithium-boron alloy strips are cut into discs with a diameter of d=16 and The obtained mass M=0.0254g.
[0053] Assemble it as a positive electrode and a lithium sheet negative electrode to form a CR2016 button battery, and record the discharge capacity C when it is charged to 0.4V at a constant current density of 1mA / cm2 1 =71.26mAh, C 1 / M to obtain the actual specific capacity C of the lithium-boron alloy b =2805.7mAh / g (see figure 1 ), C b / 3860 to get the active lithium percentage content of this disc is 72.6%, take the average value of the active content of five groups of discs as the active lithium content of this type of lithium-boron alloy material.
[0054] (1) Mix sulfur-carbon composite material (containing 65% sulfur), acetylene black, and polytetrafluoroethylene binder in a mass ratio of 8:1:1, use N-methylpyrrolidone as a dispersa...
Embodiment 2
[0061] Using lithium-boron alloy strips with a ratio of Li:B:Mg=89.85:8.5:1.65 as raw materials, cut the lithium-boron alloy strips into discs with a diameter of d=16 and weigh the obtained mass M=0.0260g
[0062] Assemble it as a positive electrode and a metal lithium negative electrode to form a CR2016 button battery, and record the discharge capacity C when it is charged to 0.4V with a current density of 1mA / cm2. 2 =74.5mAh, C 2 / M to obtain the actual specific capacity C of the lithium-boron alloy d =2865.4mAh / g, C d / 3860 to get the active lithium percentage content of this disc is 74.2%, take the average value of the active content of five groups of discs as the active lithium content of this type of lithium-boron alloy material.
[0063] Commercial LiCoO 2 Powder, acetylene black, and polytetrafluoroethylene binder are mixed evenly at a mass ratio of 8:1:1, and N-methylpyrrolidone is used as a dispersant. After ball milling, the mixture is evenly mixed and coated on ...
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