Thin battery
A technology of thin batteries and conductive materials, applied in dry batteries, secondary batteries, printed batteries, etc.
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Examples
Embodiment 1
[0060] Combine 10 parts of MnO in powder form 2 , 1 part graphite powder and 0.022 parts boric acid are mixed together and stirred for 10-20 minutes. In order to prepare the cathode paste material, then 7 parts of 9M ZnCl 2 An electrolyte solution composed of 3.5% PVA (Celvol 540, Celanese Chemicals) with a MW of 140,000-186,000 in an aqueous solution was poured into the above powder mixture.
[0061] A thin battery containing the cathode paste prepared above is manufactured as follows:
[0062] The anode was prepared by printing zinc ink on separator paper. The amount of zinc ink is 12mg / m 2 .
[0063] The cathode current collector was printed on polyethylene coated paper by using Creative Materials conductive carbon ink 116-19 ink. After drying the cathode current collector, a cathode paste is applied thereon to form a cathode.
[0064] The anode and cathode prepared above are then laminated together to form a thin battery assembly.
[0065] The measurement results show that the ca...
Embodiment 2
[0067] Put 10 parts of MnO 2 Mix with 1 part of graphite powder and stir for 10-20 minutes. Then mix 6.3 parts from 9M ZnCl 2 , 3.5% of PVA (Celvol 540, Celanese Chemicals) with a MW of 140,000-186,000 and 0.22 parts of boric acid are poured into the above powder mixture. Stirring was continued for 1 hour to form a cathode paste material. The total amount of boric acid is 0.08% based on the weight of the cathode paste.
[0068] The viscosity of the electrolyte solution is about 2000 cps.
[0069] The cathode paste is applied on the cathode current collector. The thin battery was assembled in the same manner as in Example 1.
[0070] The measurement results show that the capacity of the battery is 1.8-1.9mAh / cm 2 . Therefore, the capacity is 10-20% higher than that of a battery in which boric acid is mixed with the cathode active material in powder form during the manufacturing process of the cathode paste.
Embodiment 3
[0072] Put 10 parts of MnO 2 , 1 part of graphite powder and 0.08 parts of carbon nanotubes (from Timesnano) are mixed together and stirred for 10-20 minutes. Then mix 12 parts by 8M ZnCl 2 An electrolyte solution composed of 1% CMC, 5% PVA (Celvol 540, Celanese Chemicals) with a MW of 140,000-186,000 and various amounts of boric acid in an aqueous solution is poured into the above powder mixture. The amount of boric acid is given in Table 3 below.
[0073] In the same manner as in Example 1, a thin battery containing the modified cathode paste material of the present invention was manufactured. The capacity of these thin batteries and similarly manufactured thin batteries without boric acid were measured during a period of 1 year at room temperature.
[0074] Table 3. Performance of thin batteries
[0075]
[0076] The results show that compared with the capacity of a battery without boric acid, the battery capacity is significantly improved during long-term battery use by using b...
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Abstract
Description
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