The positive and negative electrodes of a flat head lithium battery mainly depend on the shape of the two ends. The bulged end is positive and the flat bottom is negative.
Lithium batteries are batteries that use lithium metal or lithium alloy as negative electrode material and use non-aqueous electrolyte solution, so this battery is also called lithium battery. lithium metal. Unlike other batteries, lithium batteries have the characteristics of high charge density, long life and high unit cost. Depending on the structural design and electrode materials, lithium batteries can produce voltages ranging from 1.5 V (equivalent to zinc-carbon or alkaline batteries) to 3.7 V.
The lithium batteries are batteries with metallic lithium as the negative electrode, also known aslithium metal batteries. It should be noted that lithium batteries are divided into primary batteries and secondary batteries according to different battery configurations. The first lithium batteries were primary batteries, but due to the highly active chemical properties of lithium metal, their processing, storage and use were subject to very high environmental requirements.
Thus, lithium batteries were not widely used after their invention. With the development of microelectronic technology in the late 20th century, the number of miniaturized devices has increased day by day, which places ever higher requirements on power supply. Lithium batteries then entered the stage of large-scale practical use. The most common lithium battery structure currently used by consumers uses lithium metalas the negative electrode, manganese dioxide as the positive electrode and lithium salt dissolved in an organic solvent as the electrolyte.