Lithium-ion battery negative electrode and flexible lithium-ion battery
A lithium-ion battery and negative electrode technology, applied in the direction of battery electrodes, positive electrodes, negative electrodes, etc., can solve the problems of low energy density, large lattice change, and low operating voltage of the negative electrode, and achieve the purpose of inhibiting the formation of lithium dendrites and crystallization. The effect of high grid change and high capacity
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[0046] see Figure 8 , the second embodiment of the present invention provides the preparation method of the above lithium ion battery negative electrode 100, the preparation method includes the following steps:
[0047] S1: Provide a carbon nanotube array, a solvent and a titanium salt;
[0048] S2: Scraping the carbon nanotube array to obtain a plurality of carbon nanotubes, dispersing the plurality of carbon nanotubes into the solvent, and ultrasonically treating the plurality of carbon nanotubes to form a three-dimensional network structure;
[0049] S3: Add the titanium salt to the solvent dispersed with a three-dimensional network structure, and hydrolyze the titanium salt to produce titanium dioxide (TiO 2 ) particles, the titanium dioxide nanoparticles adsorbed on the surface of a plurality of carbon nanotubes in the three-dimensional network structure; and
[0050] S4: separating the three-dimensional network structure adsorbed with titanium dioxide nanoparticles fr...
Embodiment 1
[0082] The flexible lithium-ion battery in the present embodiment is with metal lithium sheet as reference electrode, and Celgard 2400 microporous polypropylene film is separator, dissolves in ethylene carbonate (EC), diethyl carbonate (DEC) and carbonic acid with 1mol / L LiPF The mixed solution of dimethyl ester (DMC) is the electrolyte; the active material of the positive electrode is lithium manganate particles with a particle size of about 10 microns. The mass percentage of positive electrode active particles in the positive electrode of the lithium ion battery is 96%; the particle size of the titanium dioxide nanoparticles is in the range of 3 nanometers to 10 nanometers, and the mass percentage of the titanium dioxide nanoparticles in the negative electrode of the lithium ion battery is 28.7% , the mass density of the titanium dioxide nanoparticles is 1.3 mg / cm 2 .
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