Choosing the suitable battery, no matter the silver zinc battery or the lithium-ion rechargeable battery, to satisfy your using requirements demands to know some relevant information, such as working principles, voltage, service lifespan or maintenance etc. In this article, we offer you a detailed comparison between silver zinc battery or the lithium-ion rechargeable battery to help you make an appropriate choice.
What are Silver Zinc Battery and Lithium-ion Rechargeable Battery?
Zinc battery and lithium-ion rechargeable battery are both rechargeable batteries that you can use in different situations but they have differences in many aspects.
Namely, silver zinc batteries use oxide and zinc as electrodes and they are famous for high suitability for applications requiring high power density. That is to say, silver zinc batteries have excellent performance on delivering large amounts of energy in a very short time. At the same time, they are also known for their long service lifespan and good tolerance to shock or vibration.
However, lithium-ion rechargeable batteries use a lithium-ion intercalation mechanism between carbon-based anodes and metal oxide cathodes. Usually, they are famous for higher energy density, meaning that they can save more energy in a relatively small and light volume. Therefore, lithium-ion rechargeable batteries are more suitable for electronic products.
Structure and Working Principle
The structure and working principle of silver zinc battery and lithium-ion rechargeable battery are quite different.
The silver zinc battery includes Silver oxide (AgO) as Cathode, Zinc (Zn) as anode, and Alkaline solution (usually potassium hydroxide) as Electrolyte.
When discharging, zinc release electrons which will flow towards the silver oxide cathode through the external circuit. This process is aimed to reduce silver oxide to metallic silver while zinc is oxidized to zinc oxide. When the charging process is reversed, the reaction mentioned above will restore capacity.
However, lithium-ion rechargeable battery includes carbon-based materials (such as graphite, lithium titanate, or silicon) as anode, Lithium metal oxides (such as LiCoO₂, LiFePO₄, LiMn₂O₄) as cathode and Lithium salt solution dissolved in an organic solvent or polymer electrolyte as electrolyte.
When discharging, the lithium ions move from the anode to the cathode and the moving orientation will be opposite during charging.
Energy Density
Usually, the volumetric energy density of silver zinc batteries is quite high, ranging from 100 to 150 wh/kg. Therefore, you are allowed to use silver zinc batteries in the field of space where there are strict demands or constraints on space and weight, such as aerospace.
What’s more, the energy density of silver zinc batteries is better than most batteries with low internal resistance, which means that silver zinc batteries have good performance on delivering high discharge rates and can quickly discharge large amounts of energy under load.
Compared with silver zinc batteries, nowadays lithium-ion rechargeable batteries are the most mainstream rechargeable batteries and also have a high energy density, around 150 to 250 wh/kg.
Moreover, the energy-to-weight ratio is more balanced than silver zinc battery and performs higher versatility when you consume electronics and electric transportation applications.
Weight
The weight of silver zinc batteries under the same volume is heavier than any other batteries, especially lithium-ion rechargeable batteries because silver zinc batteries have lower energy density.
Different from silver zinc batteries, due to the higher energy density, lithium-ion rechargeable batteries are lighter and more suitable to be used in portable applications.
In conclusion, at the same capacity, silver-zinc batteries are typically 30 to 100% heavier than lithium-ion rechargeable batteries, depending on the particular cell model and package design.
Voltage Platform
The nominal voltage of the silver zinc battery is around 1.5 volts. Usually, you can see that the stability of voltage will decline slightly during discharging but it can still maintain stability generally.
Therefore, you are recommended to use silver zinc batteries for low-voltage devices or systems equipped with voltage boost circuits.
Compared with silver zinc batteries, the nominal voltage of lithium-ion rechargeable batteries is around 3.6 to 3.7 voltage. Also, lithium-ion rechargeable batteries witness better stability of voltage and use few cells to meet the same system voltage.
Therefore, lithium-ion rechargeable batteries are recommended to you to use in the electronic products which demand high voltage.
Self-Discharge Rate
Low self-discharge rate is one of the greatest advantages of silver zinc batteries. In other words, when the silver zinc battery is not in use, the consumption of energy is relatively lower than other types of batteries.
However, lithium-ion rechargeable batteries have difficulty in dealing with self-discharging. Even though you do not use a lithium-ion rechargeable battery, it will self-discharge in a slow speech but the speed of self-discharge is usually slower than that of nickel-metal hydride(NiMH) batteries.
Service Lifespan
Usually, the life cycle of silver zinc batteries is regarded as a relatively short period. Under the standard conditions, the lifespan of silver zinc batteries is ranging from 3 to 5 years. Also, the charge/discharge cycles are typically from 100 to 200 cycles and then the capacity of silver zinc batteries will reduce to below 80% which is significantly lower than lithium-ion rechargeable batteries.
Therefore, if you want to meet your need of using silver zinc batteries in the short-term and ensuring a high level of safety, silver zinc batteries are your best choice.
Compared with silver zinc batteries, lithium-ion rechargeable batteries are famous for their long service lifespan. They perform well on recharging for approximately 300 to 1000 cycles and with some high-end models they can even recharge for excessive 2000 cycles.
Besides, lithium-ion batteries show slower capacity degradation over time during charging and discharging. Thus, you are permitted to use a lithium-ion rechargeable battery for many times and for a long period.
Cost
The overall manufacturing cost of silver zinc batteries is usually higher than that of any other batteries because silver is a precious metal. However, the manufacturing cost of lithium-ion rechargeable batteries is more economical compared with the cost of silver zinc batteries. Besides, after the achievement of large-scale manufacturing, lithium-ion batteries have moderate costs and become more affordable.
Safety
Silver zinc batteries are also famous for their higher safety than ;lithium-ion rechargeable batteries. They are not prone to thermal runways, fire or explosion.
However, lithium-ion rechargeable batteries are subject to thermal runaway. Under certain conditions, such as overcharging, over-discharging or physical damage can trigger ignition or explosion easily.
Environmental Friendliness
Silver zinc batteries have good performance on environmental friendliness due to silver and zinc being both recyclable materials that can be completely recycled. Besides, silver zinc batteries are free from heavy metal pollution and with low toxicity.
Compared with silver zinc batteries, the recyclable performance of lithium-ion rechargeable batteries is not as good as that of silver zinc batteries. In the future, new materials developments such as NMC and LPF are reducing cobalt usage and helping to improve environmental impact.
Shock Resistance
Silver-zinc batteries usually offer excellent shock or vibration resistance and are widely used in aerospace and military equipment. They have good performance on withstanding strong shocks and high-speed acceleration.
Besides, the compact structure of silver-zinc batteries makes them suitable for all kinds of environments with intense vibration. They also maintain stable performance under vibration and have a low risk of thermal runaway.
Lithium-ion rechargeable batteries, on the other hand, perform good vibration resistance and usually require additional structural protection—especially in mobile devices and electric vehicles.
Most lithium-ion rechargeable batteries are in soft-pack or cylindrical form, and the casing material has a large influence on their impact resistance. If the structure is damaged or a short circuit occurs, there is a fire risk, particularly when it is subjected to external injury.
Temperature Performance
Usually, silver zinc batteries are sensitive to high temperatures which may accelerate the degradation of capacity. Thus, the operating temperature of silver zinc batteries ranging from -20°C to +55°C and some military-grade models can also support even wider ranges.
Besides, the performance of degradation is relatively moderate, and certain models can still discharge effectively at low temperatures.
However, the charging temperature of lithium-ion rechargeable batteries usually ranges from 0°C to +45°C and the discharging temperature is from -20°C to +60°C.
As for lithium-ion rechargeable batteries, they are more easily influenced by overcharging and over temperature, thus resulting in fire and explosion. What’s more, if the temperature is below -10°C, the ability of discharging will be reduced.
Maintenance
The maintenance of silver zinc batteries is relatively simple and does not need complicated Battery Management System (BMS). But they must require frequent maintenance and replacement due to their shorter lifespan.
In other words, initial equipment is simple, but in the long term you have to pay more for high material costs (especially silver) and regular inspection.
In contrast to silver zinc batteries, lithium-ion batteries must be equipped with a BMS to avoid the risks of overcharging, over-discharging or other problems. Thus, the maintenance of them is more complicated than silver zinc batteries.
That is to say, you have to pay more initial costs but in the long term the total cost over the battery’s lifespan is generally lower due to reduced maintenance frequency.
Applications
Usually, silver zinc batteries can be used in the field of aerospace, military equipment, medical devices and other high-end portable electronic devices due to the properties of cycled life , low voltage, high reliability and bio-compatibility.
While in terms of lithium-ion rechargeable batteries, they are more suitable for mobile phones, laptops and electric vehicles because lithium-ion rechargeable batteries have low long-term costs and fast charging speed.
Conclusion
Batteries play an important role in our daily life and it is truly necessary for you to learn some useful knowledge such as lifespan, performance, maintenance etc. to help you make the right choice of battery.
After reading this article, I believe that you have known the differences and similarities between silver zinc batteries and lithium-ion rechargeable batteries. If you still have some problems , please contact us without hesitation!
