There are many kinds of batteries sold in the market. The more applied ones are lead-acid batteries, nickel-cadmium (NiCd) batteries, nickel-metal hydride (NiMH) batteries, Rechargeable Li-ion batteries, and so on. They are all used in different scenarios due to their different characteristics. The article will analyze the performance of these types of batteries, including NiMH battery, NiCd battery, and rechargeable Li-ion battery, to provide a reference for users in selecting battery types.
What Are They?
Before comparing these types of batteries, users should learn about the materials of these batteries.
NiMH Battery: NiMH batteries are divided into high-voltage NiMH batteries and low-pressure NiMH batteries. The positive active substance of the NiMH battery is Ni(OH)2 (called NiO electrode), the negative active substance is metal hydride, and the electrolyte is potassium hydroxide solution. NiMH batteries are increasingly noticed as an important direction for hydrogen energy applications.
NiCd Battery: Nickel-cadmium battery, named after its alkaline hydroxide containing metallic nickel and cadmium. Its positive electrode material is nickel hydroxide, and the negative electrode material is spongy cadmium metal or cadmium oxide powder and iron oxide powder. Iron oxide powder is beneficial to increase the capacity of the electrode plate.
Rechargeable Li-ion Battery: Its cathode material is various lithium compounds, mainly lithium cobaltate, lithium manganate, etc. Its cathode material is graphite and other alloy materials. Lithium batteries have various electrolytes, including liquid, solid polymer, gel polymer, and composite polymer electrolytes.
How about Their Performance Index?
After learning about NiMH battery, NiCd battery, and rechargeable Li-ion battery, the following battery performance indicators are generally compared.
- Energy Density
It marks the time that the battery can be used after a single charge, Wh/kg, showing the amount of energy a battery can deliver per kilogram of mass. Generally speaking, the energy density of the Rechargeable Li-ion battery is 110-160Wh/kg, twice as much as NiMH batteries and 2-3 times as much as NiCd batteries. So the same volume of Rechargeable Li-ion battery contains the most energy.
- Cycle Life
It refers to the length of working time of the battery, marking the economy and stability of the battery. The cycle time of NiCd battery is 300-800 times, NiMH battery is 500-1000 times, while the Rechargeable Li-ion battery can be cycled more than 1000 times.
- Safety and Environmental Protection
From the battery raw materials mentioned above, it can be seen that both nickel-metal hydride batteries and Rechargeable Li-ion batteries are environmentally friendly and have no environmental pollution. The cadmium in nickel-cadmium batteries is toxic, but it will not affect the human body and the environment if handled properly.
- Factors Affecting the Life of the Battery
Nickel-cadmium batteries have a memory effect, so you need to pay attention to the charging time and frequency of the battery. And it should pay attention to the charging and discharging time and situation of NiMH batteries and Rechargeable Li-ion batteries to extend the battery life.
Under the same capacity of these three batteries, the highest price is Rechargeable Li-ion batteries; the lowest is nickel-cadmium batteries.
The comparison shows that each of these batteries has its properties and merits. For example, NiCd batteries have low internal resistance and do not affect overcharge or over-discharge, providing high current to the load. NiMH batteries have a good performance on low-temperature discharge. The Rechargeable Li-ion battery is thin and light and has a high capacity.
These batteries of different features are widely used in all aspects of life, and it is important to choose the right one. At the same time, it is significant for users to choose a battery supplier with strong strength and excellent product quality. BetterPower Battery Co., Ltd is such a company.
Choose Batteries from BetterPower
As a National Hi-tech Enterprise, Better Power (BPI) is the unique domestic environment protective energy manufacturer integrated with various kinds of rechargeable batteries and outdoor energy storage systems. The super-low self-discharge Ni-MH battery and Rechargeable Li-ion batteries from BPI are popular. In addition, we have more than 1,400 workers and technologically mature production lines, committing to providing users with safe and cost-effective battery products.