A kind of preparation method of high-performance lithium-ion battery cathode material limbo3c composite material
A cathode material and composite material technology, which is applied in the field of LiMBO3C composite materials for high-performance lithium-ion battery cathode materials, can solve the problems that have not been reported yet, and achieve the effects of low price, simple and easy-to-obtain raw materials, and simple methods
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Embodiment 1
[0036] Composite material of lithium manganese borate and carbon (LiMnBO 3 C) Preparation
[0037] 1. Put 2.5mmol MnCO 3 ,2.5mmolH 3 BO 3 ,1.25mmolLi 2 CO 3 , 7.5mmol of methacrylic acid was added to a 25mL beaker, 5mL of deionized water was added and stirred evenly, placed in a water bath at 80 ℃, stirring and heating, under constant stirring, adding 1mL of 5% ammonium persulfate aqueous solution as the initiator, continue to stir and heat for 2 hours until there is A viscous solid is formed. Transfer to a 100℃ oven for drying for 5 hours, and grind to obtain LiMnBO 3 C precursor powder. LiMnBO 3 C precursor powder in Ar / H 2 The final product can be obtained by heating to 650°C for 7 hours at a heating rate of 5°C / min in an atmosphere. The product was subjected to phase analysis with a Bruker D8ADVANCE X-ray powder diffractometer with CuKα rays (wavelength scanning pace: 0.08° / sec), and the result showed that it was pure phase LiMnBO 3 C complex (results like figure 1 Shown), c...
Embodiment 2
[0039] Composite material of lithium manganese borate and carbon (LiMnBO 3 C) Preparation
[0040] Mn(NO 3 ) 2 (50% aqueous solution), LiOH·H 2 O, H 3 BO 3 Add 0.06mol each and 0.18mol methacrylic acid into a 250mL beaker, add 120mL deionized water and stir evenly, place it in a water bath at 80°C, stir and heat, add 1mL 5% sodium persulfate aqueous solution as initiator, continue to stir and heat for 1 hour until there is A viscous solid is formed. Transfer to 110℃ oven for drying for 4 hours, grinding to obtain LiMnBO 3 C precursor powder. LiMnBO 3 C precursor powder in Ar / H 2 The final product can be obtained by calcination in an atmosphere at a rate of 6°C / min to 700°C for 6 hours. The product was subjected to phase analysis with a Bruker D8ADVANCE X-ray powder diffractometer with CuKα rays (wavelength scanning pace: 0.08° / sec), and the result showed that it was pure phase LiMnBO 3 C composite can be used as the positive electrode active material of lithium ion battery.
[00...
Embodiment 3
[0044] Composite material of lithium manganese borate and carbon (LiMnBO 3 C) Preparation
[0045] Mn(NO 3 ) 2 (50% aqueous solution), LiOH·H 2 O, H 3 BO 3 Add 0.06mol of each and 0.06mol of acrylic acid into a 250mL beaker, add 120mL of deionized water and stir evenly, place in a water bath at 90°C, stir and heat, add 1mL of 5% ammonium persulfate aqueous solution as an initiator, continue to stir and heat for 1 hour until viscous Like solid formation. Transfer to a 120℃ oven for drying for 4 hours, and grind to obtain LiMnBO 3 C precursor powder. LiMnBO 3 C precursor powder in Ar / H 2 The final product can be obtained by heating to 750°C for 5 hours at a rate of 7°C / min in the atmosphere. The product was subjected to phase analysis with a Bruker D8ADVANCE X-ray powder diffractometer with CuKα rays (wavelength scanning pace: 0.08° / sec), and the result showed that it was pure phase LiMnBO 3 C composite can be used as the positive electrode active material of lithium ion battery. ...
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