Positive electrode coating solution, positive electrode precursor, and non-aqueous lithium storage device
A coating liquid and positive electrode technology, which is applied in the field of positive electrode precursors and non-aqueous lithium storage elements, can solve the problems of unconsidered, positive electrode active material falling off, etc., and achieve the effects of suppressing falling off, small resistance rise, and high capacity
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preparation example Construction
[0192] The dispersion method in the preparation of the positive electrode coating liquid is not particularly limited, preferably, a bead mill, a ball mill, a jet mill, a homogenizer, an emulsifying disperser, a rotation-revolving mixer, a homogeneous disperser, a multiaxial disperser can be used. Machines, planetary mixers, film rotary high-speed mixers and other dispersing machines. In addition, it is also possible to disperse by combining two or more of these dispersers. In order to obtain a coating liquid in a good dispersion state, for example, when using a thin film rotary type high-speed mixer, it is preferable to disperse at a peripheral speed of 1 m / s to 50 m / s. When the peripheral speed is 1 m / s or more, various materials can be dissolved or dispersed well, which is preferable. In addition, when the peripheral speed is 50 m / s or less, various materials will not be destroyed by heat or shear force due to dispersion, and re-agglomeration will not occur, so it is prefer...
Embodiment 1
[0377]
preparation example 1a
[0379] Put the crushed coconut shell carbides into a small carbonization furnace, and carry out carbonization treatment at 500°C for 3 hours under nitrogen atmosphere to obtain carbides. Put the obtained carbide into the activation furnace, introduce the steam heated by the preheating furnace into the activation furnace at 1kg / h, and raise the temperature to 900°C for 8 hours for activation. The activated carbide was taken out and cooled under a nitrogen atmosphere to obtain activated activated carbon. The obtained activated carbon was washed with water for 10 hours to remove water, dried in an electric dryer kept at 115° C. for 10 hours, and pulverized with a ball mill for 1 hour to obtain activated carbon 1 .
[0380] The average particle diameter of the activated carbon 1 was measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation, and it was 5.5 μm. Moreover, the pore distribution of the activated carbon 1 w...
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