technology: rechargeable battery won't give up after top-ups - lithium ion rechargeable battery

A video camera launched by Sony this month is powered by a new type of battery, avoiding a common drawback of rechargeable batteries, the memory effect.
Users of video cameras and portable computers often find that if they repeatedly recharge the device's nickel,
The CD (nicad) battery will not wait until it is completely exhausted, but will last for a shorter period of time.
Nicad batteries are suitable for this device as they provide the high current required to drive the motor in the camera and computer disc drive.
Although manufacturers claim they can charge thousands of times, it's true only to run out of the battery before charging.
If it is recharged while retaining some charge, it generates a "memory" that will only return the amount of charge used for recharging.
Even if users are warned of risks, few people can resist the temptation to recharge before leaving home.
If this is done several times, the battery that should be charged for an hour can only drive the camera for 10 minutes. Lead-
The acid battery can be charged, but it is large and can only be charged hundreds of times.
Some types of electronic devices, such as a static film camera, now have an anode battery made of lithium.
These batteries can be charged for at least five years, so the battery can be used continuously as long as the device is only used to drive low power
Power Circuit and flash.
But the metal battery cannot be charged.
Battery manufacturers have been working hard to make rechargeable versions for more than a decade.
Energytec, a subsidiary of Sony, was the first to succeed, and it was cheap enough to be used for consumer devices.
The small battery is called the lithium ion battery, hidden in the new video 8 camera, CCD-TR8.
Its anode is made of carbon, and its anode is a compound of lithium, cobalt, nickel and manganese.
There is an electrolyte between the two electrodes.
Sony has tried a variety of types and has finalized the gel made from a mixture of propylene carbonate and Diester carbonate.
The battery is charged before leaving the factory, lithium ions leave the cathode, migrate through the electrolyte and embed them in the carbon anode.
When the battery is later connected to the circuit, the lithium ion is migrated back to the cathode again, generating current in the circuit.
But there are still some ions injected into the anode.
3 battery supply.
6 volts, contrast 1.
2 V voltage of Nicad battery.
The energy storage density of the battery, that is, the electrical energy stored per kilogram of weight, is at least three times that of the nicad battery.
The company said that sit can charge 1200 times, if it is not used in a month, it will only lose the cost, while nicads will only lose.
Charging speed is the same as nicads.
Energytec's factory in Japan has installed a production line that can produce 100 lithium-ion batteries per month, each less than 20mm in diameter.
Initially, they will cost 30 cents more than nicads, but prices are expected to drop as production increases.
Sony's Japanese Panasonic is also working on lithium-ion batteries.