Process for preparing cylindrical press ring form primary and secondary Zn-Ni battery

Abstract

The invention discloses a process for preparing cylinder-shaped press ring type primary and secondary Zn-Ni battery, wherein the positive electrode uses NiOOH or Ni(OH)2, graphite, additive, or KOH electrolytic solution as raw material through dry mixing, moisture mixing, sheeting, breaking and screening (which are called granulation process in general) to prepare positive electrode powder, which is then compressed into ring form and loaded into the steel cylinder of the positive electrode current collecting member, while the negative electrode uses Zn, ZnO, additive, adhesive, or KOH electrolytic solution to form grease form negative electrode.

Description

Technical field

[0001] The present invention relates to two new energy sources. Background technique

[0002] The more popular ones in the market are primary alkaline zinc-manganese batteries. The open circuit voltage is 1.5-1.65V, and the working voltage is S-shaped over time. There is no obvious platform, and the working time is longer at 1.2-1.0V. When the output current is large, the capacity decreases. For example, the AA type discharges for about 60 minutes at 1Ω, which is about 1100mAh, and the same size battery can reach 2300mAh when discharged at 10Ω. Alkaline zinc-manganese batteries have poor heavy-duty performance, which limits their use in certain occasions, such as toy cars, video cameras, digital cameras, mobile communications, laptop computers, and so on.

[0003] The cycle life of the secondary alkaline zinc-manganese battery is only dozens of times, the first discharge capacity is much smaller than that of the primary alkaline zinc-manganese battery, and ...

Examples

Embodiment 1

[0022] Example 1 Preparation of AA size primary Zn-Ni battery

[0023] Weigh 90g of self-made NiOOH powder, 10g of graphite powder, 1g of additive, 0.5g of binder, dry mix for 20 minutes, add 10g of KOH solution with a weight ratio of 38%, and wet mix for 30 minutes. Thickness: 0.2-0.5mm, crushed and pressed into tablets, then crushed and then sieved, the upper sieve is 40 mesh, and the lower sieve is 80 mesh. Store the powder that has passed the upper sieve and the powder that has not passed the lower sieve. The powder that does not pass the upper sieve is crushed and sieved. The powder that passes through the lower sieve is then compressed into tablets to repeat the above process. Measure the particle size distribution and apparent specific gravity of the qualified powder. The apparent specific gravity is 1.68g / cm 3 , The particle size is between 40-200 mesh, 40-60 mesh accounts for 5%, 60-80 mesh accounts for 80%, 80-100 mesh accounts for 10%, and 100-200 mesh accounts ...

Embodiment 2

[0028] Example 2 Preparation of AA-sized secondary Zn-Ni battery

[0029] With β-Ni(OH) 2 90g, graphite powder 10g, additive I 2g, additive II 1g, binding agent 0.5g, dry mix 20 minutes, add weight ratio 38% KOH solution 10g wet mix 30 minutes, other is the same with example 1. The weight of the ring pressed by 2.8g of granulated qualified powder is 2.7g, and the ring height is 12mm. Three rings are put into the steel cylinder and repressed. ) into a negative electrode collector to make a battery, charged with a small current of 100mA, and discharged to 1.0V with a constant current of 200mA. After charging and discharging 3 times, the capacity is about 800mAh.

[0030] The ring strength of ungranulated powder is not good, water will be generated after charging, and the ring will be loose and deformed.

[0031] The present invention is not limited to AA size batteries, and is suitable for cylindrical pressure ring type Zn-Ni primary and secondary batteries of all other spec...

Technical field

[0001] The present invention relates to two new energy sources. Background technique

[0002] The more popular ones in the market are primary alkaline zinc-manganese batteries. The open circuit voltage is 1.5-1.65V, and the working voltage is S-shaped over time. There is no obvious platform, and the working time is longer at 1.2-1.0V. When the output current is large, the capacity decreases. For example, the AA type discharges for about 60 minutes at 1Ω, which is about 1100mAh, and the same size battery can reach 2300mAh when discharged at 10Ω. Alkaline zinc-manganese batteries have poor heavy-duty performance, which limits their use in certain occasions, such as toy cars, video cameras, digital cameras, mobile communications, laptop computers, and so on.

[0003] The cycle life of the secondary alkaline zinc-manganese battery is only dozens of times, the first discharge capacity is much smaller than that of the primary alkaline zinc-manganese battery, and ...

Examples

Embodiment 1

[0022] Example 1 Preparation of AA size primary Zn-Ni battery

[0023] Weigh 90g of self-made NiOOH powder, 10g of graphite powder, 1g of additive, 0.5g of binder, dry mix for 20 minutes, add 10g of KOH solution with a weight ratio of 38%, and wet mix for 30 minutes. Thickness: 0.2-0.5mm, crushed and pressed into tablets, then crushed and then sieved, the upper sieve is 40 mesh, and the lower sieve is 80 mesh. Store the powder that has passed the upper sieve and the powder that has not passed the lower sieve. The powder that does not pass the upper sieve is crushed and sieved. The powder that passes through the lower sieve is then compressed into tablets to repeat the above process. Measure the particle size distribution and apparent specific gravity of the qualified powder. The apparent specific gravity is 1.68g / cm 3 , The particle size is between 40-200 mesh, 40-60 mesh accounts for 5%, 60-80 mesh accounts for 80%, 80-100 mesh accounts for 10%, and 100-200 mesh accounts ...

Embodiment 2

[0028] Example 2 Preparation of AA-sized secondary Zn-Ni battery

[0029] With β-Ni(OH) 2 90g, graphite powder 10g, additive I 2g, additive II 1g, binding agent 0.5g, dry mix 20 minutes, add weight ratio 38% KOH solution 10g wet mix 30 minutes, other is the same with example 1. The weight of the ring pressed by 2.8g of granulated qualified powder is 2.7g, and the ring height is 12mm. Three rings are put into the steel cylinder and repressed. ) into a negative electrode collector to make a battery, charged with a small current of 100mA, and discharged to 1.0V with a constant current of 200mA. After charging and discharging 3 times, the capacity is about 800mAh.

[0030] The ring strength of ungranulated powder is not good, water will be generated after charging, and the ring will be loose and deformed.

[0031] The present invention is not limited to AA size batteries, and is suitable for cylindrical pressure ring type Zn-Ni primary and secondary batteries of all other spec...

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