Button type total battery consisting of lithium titanate pole piece and graphite pole piece as well as preparation method of button type total battery
A lithium titanate and full battery technology, which is applied in secondary battery manufacturing, electrolyte battery manufacturing, battery electrodes, etc., can solve the problems of not being able to provide lithium sources, lithium titanate pole pieces and graphite can not be directly made into batteries, etc., to achieve Good high temperature resistance, excellent fast charging performance, and long cycle life
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Embodiment 1
[0027] The preparation method of the button-type full battery described in this embodiment comprises the following steps:
[0028] Preparation of lithium titanate pole piece: add lithium titanate, conductive agent, and binder solution into a beaker in a weight ratio of 80:10:10, and add NMP to obtain 5g of a mixed solution. The amount of NMP added is lithium titanate, conductive agent, and 5% to 10% of the total mass of the binder; put the beaker into a high-speed disperser and rotate at a high speed of 2000r / min for 8 minutes; apply the mixed solution evenly on the copper foil with an automatic coater; Put the coated copper foil into the oven and bake at 90°C for 60 minutes; roll the dried pole piece with an electric roller press until the compacted density is 1.1g / cm3; The pressed pole piece was punched with a punching machine to obtain a lithium titanate pole piece with a diameter of 10 mm, and the lithium titanate pole piece was vacuum-dried at 80° C. for 24 hours.
[002...
Embodiment 2
[0034] The preparation method of the button-type full battery described in this embodiment comprises the following steps:
[0035]Preparation of lithium titanate pole piece: add lithium titanate, conductive agent, and binder solution into a beaker in a weight ratio of 83:7:10, and add NMP to obtain 6g of mixed solution. The amount of NMP added is lithium titanate, conductive agent and 10% of the total mass of the binder; put the beaker into a high-speed disperser and rotate at a high speed of 2000r / min for 10 minutes; apply the mixed solution evenly on the copper foil with an automatic coating machine; Put the copper foil in the oven and bake it at 100°C for 70 minutes; roll the dried pole piece with an electric roller press until the compacted density is 1.2g / cm3; The pole piece was punched with a punching machine to obtain a lithium titanate pole piece with a diameter of 11 mm, and the lithium titanate pole piece was vacuum-dried at 100° C. for 36 hours.
[0036] Preparatio...
Embodiment 3
[0041] The preparation method of the button-type full battery described in this embodiment comprises the following steps:
[0042] Preparation of lithium titanate pole piece: Add lithium titanate, conductive agent, and binder solution into a beaker in a weight ratio of 82:8:10, and add NMP to obtain 5g of mixed solution. The amount of NMP added is lithium titanate, conductive agent and 8% of the total mass of the binder; put the beaker into a high-speed disperser, and rotate at a high speed of 1500r / min for 10 minutes; apply the mixed solution evenly on the copper foil with an automatic coating machine; Put the good copper foil into the oven and bake at 80°C for 80 minutes; roll the dried pole pieces with an electric roller press until the compaction density is 1.3g / cm3; The pole piece was punched with a punching machine to obtain a lithium titanate pole piece with a diameter of 12 mm, and the lithium titanate pole piece was vacuum-dried at 100° C. for 48 hours.
[0043] Prep...
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Abstract
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