Nickel batteries.
According to the analysis of the material characteristics of the battery itself, nickel metal hydride is afraid of low voltage. The closer the voltages of the positive and negative electrodes are, the greater the conductive agent used in the positive electrode. and the metal electrode used in the negative electrode will each produce a slight irreversible chemical reaction that affects the life of the battery. Lithium batteries are afraid of high voltage. The higher the voltage, the easier it is for the electrolyte to decompose and aggravate the corrosion of the positive and negative electrodes.
In most cases, if nickel-metal hydride is an option, it is best to choose standard AA-type batteries that can be replaced.
Which environmentally friendly battery is best?
Ni-MH batteries are best. The differences inThere are nickel-hydrogen batteries and lithium batteries:
Which environmentally friendly battery is better?
Ni-MH batteries are the best. p>1. The cell voltages are different. The voltage of lithium-ion batteries is 3.7-4.2V, and the voltage of nickel-metal hydride batteries is only 1.2V. The capacity of one lithium-ion battery is equivalent to three batteries nickel-metal hydride connected in series.
2. The loading speed is different. Due to the active performance of lithium ions, they move faster inside the battery, so the charging current is larger and the charging speed is faster. A lithium-ion battery can be fully charged in about 3 hours, while the charging speed of nickel is high. metal hydride batteries are very slow and it takes about 1 day.
3. The densityenergy tee is different. Lithium-ion batteries have a high energy density. In the first batch of promotional catalogs in 2019, the energy density of electric vehicle batteries reached more than 160 Wh/kg; nickel-metal hydride batteries have a low energy density, only 40 to 70 Wh/kg; kg. Therefore, at equal volume, lithium-ion batteries have a greater capacity than nickel-metal hydride batteries.
4. Memory effects are different. Lithium-ion batteries have no memory effect and can be charged at any time; nickel-metal hydride batteries have a certain memory effect. It is best to fully discharge and charge them during daily use to avoid affecting the battery capacity.
5. The self-discharge phenomenon is different. Although the self-discharge capacity of nickel-metal hydride batteries is not large by comparisonport to nickel-cadmium batteries, compared to the almost negligible self-discharge of lithium batteries, nickel-metal hydride batteries are simply the king of discharge.
6. The prices are different. Lithium batteries are expensive and NiMH batteries are cheap. However, the price of lithium-ion batteries has fallen rapidly over the past two years.
Which is better: rechargeable nickel-metal hydride batteries or lithium batteries?
There are many types of environmentally friendly batteries, the most common being lithium batteries, nickel metal hydride batteries and nickel cadmium batteries. Their environmental performances are also different. Here are the characteristics of some common eco-friendly batteries:
1. Lithium battery: Lithium battery is more environmentally friendly thanother batteries because its cathode material is doped with various metals. such as nickel, manganese and cobalt, and the production process for these metals has a much lower impact on the environment than that of metals like lead and mercury.
2. Nickel-metal hydride battery: The environmental performance of nickel-metal hydride battery is slightly better than that of nickel-cadmium battery, because the nickel and hydrogen atoms contained in its negative electrode material are recyclable. and the life of the material is longer.
3. Nickel-cadmium batteries: Although nickel-cadmium batteries have higher energy storage density than other batteries, the heavy metal elements such as nickel and cobalt contained in them can easily cause environmental pollution. environment.dye. This is why nickel-cadmium batteries have been gradually abandonedes and replaced by more environmentally friendly batteries.
Generally speaking, if you want to choose an environmentally friendly battery, it is recommended to choose lithium batteries or nickel-metal hydride batteries. In addition, when purchasing batteries, be sure to choose classic brands and avoid using counterfeit and low-quality products to ensure your safety and that of the environment.
Comparison of nickel-zinc batteries and lithium batteries
It is better to use lithium batteries
1: Nickel is a heavy metal and will pollute the environment if thrown away casually. Nowadays, everyone pays attention to environmental protection. As ordinary people, we must do our best to help. After all, there is only one earth ~~
2: the number of charges and discharges. The lifespan of nickel-metal hydride batteries is inferiorlower than that of lithium batteries and they are not durable.
3: Ni-MH batteries are heavier than lithium batteries, so laptops use lithium batteries instead of nickel-hydrogen batteries~~
Haha, I hope you are satisfied~~
Principles of chemical reactions, discharge voltage, specific energy, etc.
1. Chemical reaction principle: Nickel-zinc batteries use nickel hydroxide and zinc hydroxide as positive and negative electrode materials for chemical reactions; Lithium batteries use carbon negative electrodes and a compound positive electrode containing lithium. materials for chemical reactions. Chemical reactions, ternary materials, lithium cobalt oxide, etc.
2. Discharge voltage and specific energy: The discharge voltage of lithium batteries can reach about 3.7V, and the specific energy and specific power are higher than that of nickel-zinc batteries. Lithium batteries can provide higher energy density and power output.