What are the differences between nickel-metal hydride batteries and lithium batteries?

Nickel-metal hydride batteries are composed of hydrogen ions and metallic nickel, which have 30% more power reserve than nickel-cadmium batteries, lighter than nickel-cadmium batteries, and have a longer service life, and are environmentally friendly and have no memory effect. The disadvantage of nickel-metal hydride batteries is that the price of nickel-cadmium batteries is much more expensive, and the performance is worse than that of lithium batteries. Lithium battery is a kind of high energy density battery using lithium battery as material. Lithium battery is also a kind of smart battery, it can cooperate with special original smart charger to achieve the shortest charging time, the longest life cycle and the largest capacity. Lithium battery is currently the best battery. Compared with nickel-cadmium batteries and nickel-hydrogen batteries of the same size, it has the largest power reserve, the lightest weight, the longest life, the shortest charging time, and no memory effect. There are two main types of rechargeable batteries: lead-acid batteries and alkaline batteries. The nickel-cadmium (NiCd), nickel-metal hydride (NiMH) and lithium-ion (Li-Ion) batteries currently in use are all alkaline batteries. The material of the positive plate of the NiMH battery of the NiMH battery is NiOOH, and the material of the negative plate is a hydrogen-absorbing alloy. The electrolyte is usually 30% KOH aqueous solution, and a small amount of NiOH is added. The diaphragm is made of porous vinylon non-woven fabric or nylon non-woven fabric. There are two types of NiMH batteries: cylindrical and square. The active material on the positive plate of the nickel-cadmium battery NiCd battery is composed of nickel oxide powder and graphite powder. Graphite does not participate in chemical reactions, and its important purpose is to enhance conductivity. The active material on the negative plate is composed of cadmium oxide powder and iron oxide powder. The purpose of the iron oxide powder is to make the cadmium oxide powder have higher diffusibility, prevent agglomeration, and increase the capacity of the electrode plate. The active materials are respectively wrapped in perforated steel strips, which become the positive and negative plates of the battery after being press-formed. The polar plates are separated by alkali-resistant hard rubber insulating rods or perforated polyvinyl chloride corrugated boards. The electrolyte is usually potassium hydroxide solution. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the differences between lithium iron phosphate batteries and ternary lithium batteries?