Sheet lithium-enriched manganese-based anode material for lithium-ion battery as well as preparation method and application of sheet lithium-enriched manganese-based anode material
A lithium-rich manganese-based lithium ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of shortening the diffusion path, improving material rate performance, and high cycle stability
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Embodiment 1
[0036] 1) According to the molar ratio of 1.236:0.56:0.16:0.08, the raw material LiNO 3 , Mn(CH 3 COO) 2 4H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O is dissolved in ethylene glycol (which has added an excess of 3% lithium salt to offset the loss of lithium at high temperature), forming a metal salt glycol solution, lithium salt, nickel salt, manganese salt in the metal salt glycol solution And the total concentration of cobalt salt is 0.26mol / L. Magnetically stirred in a water bath environment at 85° C. for 8 hours to obtain a wine-red metal salt ethylene glycol solution.
[0037] 2) Place the burgundy metal salt ethylene glycol solution in an oven at 200°C to dry and grind to obtain a metal salt solid powder;
[0038] 3) heating the metal salt solid powder to 450°C at a heating rate of 2°C / min, and calcining at 450°C for 5h at a heating rate of 2°C / min to obtain a flaky lithium transition metal oxide precursor powder;
[0039] 4) Fully mix the flaky lithium...
Embodiment 2
[0045] 1) According to the molar ratio of 1.236:0.54:0.13:0.13, the raw material LiNO 3 , Mn(CH 3 COO) 2 4H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O is dissolved in ethylene glycol (which has added an excess of 3% lithium salt to offset the loss of lithium at high temperature), forming a metal salt glycol solution, lithium salt, nickel salt, manganese salt in the metal salt glycol solution And the total concentration of cobalt salt is 0.3mol / L. Magnetically stirred in a water bath environment at 85° C. for 8 hours to obtain a wine-red metal salt ethylene glycol solution.
[0046] 2) Place the burgundy metal salt ethylene glycol solution in an oven at 200°C to dry and grind to obtain a metal salt solid powder;
[0047] 3) Calcining the metal salt solid powder at 450° C. for 5 h with a heating rate of 2° C. / min to obtain a flaky lithium transition metal oxide precursor powder;
[0048] 4) Fully mix the lithium transition metal oxide precursor powder and potass...
Embodiment 3
[0054] 1) According to the molar ratio of 1.236:0.56:0.16:0.08, the raw material LiNO 3 , Mn(CH 3 COO) 2 4H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O is dissolved in ethylene glycol (which has added an excess of 3% lithium salt to offset the loss of lithium at high temperature), forming a metal salt glycol solution, lithium salt, nickel salt, manganese salt in the metal salt glycol solution And the total concentration of cobalt salt is 0.3mol / L. Magnetically stirred in a water bath environment at 80° C. for 8 hours to obtain a wine-red metal salt ethylene glycol solution.
[0055] 2) Place the burgundy metal salt ethylene glycol solution in an oven at 200°C to dry and grind to obtain a metal salt solid powder;
[0056] 3) Calcining the metal salt solid powder at 500°C for 5h with a heating rate of 2°C / min to obtain a flaky lithium transition metal oxide precursor powder;
[0057] 4) Fully mix the lithium transition metal oxide precursor powder and potassium c...
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