NiMH batteries typically have an energy density of 60-120 Wh/kg, which is higher than that of nickel-cadmium (NiCd) batteries but lower than lithium-ion (Li-ion) batteries. This makes them suitable for applications requiring moderate energy storage capacity, such as consumer electronics and hybrid vehicles.
Electrodes and Electrolyte Nickel metal hydroxide (NiOOH) is used as the positive electrode in NiMH batteries, while an alloy that absorbs hydrogen is used as the negative electrode. This alloy is commonly composed of nickel and rare earth metals.
NiMH batteries are a type of rechargeable battery that use nickel and metal hydride as their electrodes. They are often used in devices like digital cameras, flashlights, and remote control cars. One of the biggest advantages of NiMH batteries is that they are relatively inexpensive compared to other rechargeable battery types.
Manufacturing Cost NiMH batteries are manufactured in four steps: preparing the electrodes, assembling the cells, filling the battery with electrolytes, and sealing the battery . Lithium-ion batteries require similar steps, but quality control needs to be higher due to the raw materials used.
The first commercial NiMH batteries were introduced in the late 1980s, initially used in consumer electronics and subsequently in more demanding applications. Nickel Metal Hydride (NiMH) batteries consist of several key components that work together to store and deliver electrical energy.
NiMH batteries are safer than Li-ion batteries, with a lower risk of thermal runaway and fire. They can withstand physical abuse and overcharging better than other battery types. NiMH batteries offer a good balance of energy density and power density, making them suitable for a wide range of applications.