Caracteristicas, rendimiento y ventajas de las células solares de litio de energía

Las células solares de litio han despertado gran interés y atención debido a su alta energía específica., ciclo de vida largo, amplio rango de temperatura de funcionamiento, etc.. Lo que resulta especialmente atractivo es que el precio medio de la batería por ciclo no es elevado., y, también en una tendencia a la baja. Las ventajas y características de las células solares de litio se presentan con más detalle a continuación..

Compared with other high-energy secondary batteries (such as Ni-Cd batteries, Ni-MH batteries, etcétera), baterías de iones de litio have significant advantages in performance, mainly in the following aspects.

(1) High working voltage

Using carbonaceous lithium intercalation compounds such as graphite or petroleum coke instead of metal lithium as the negative electrode will reduce the battery voltage. Sin embargo, due to their low lithium intercalation potential, the voltage loss can be minimized. Al mismo tiempo, selecting a suitable lithium intercalation compound as the positive electrode of the battery and selecting an appropriate electrolyte system (determining the electrochemical window of the lithium solar cell) can make the lithium solar cell have a higher working voltage (-4V), which is much higher than that of the aqueous solution. system battery.

(2) Larger specific capacity

Although replacing metal lithium with carbonaceous materials will reduce the mass specific capacity of the material, in fact, in metal lithium secondary batteries, in order to ensure a certain cycle life of the battery, the negative metal lithium is usually more than three times in excess. Por lo tanto, in lithium solar cells The actual reduction in mass specific capacity is not large, and there is little reduction in volume specific capacity.

(3) Alta densidad de energía

Higher operating voltage and volumetric specific capacity determine the higher energy density of secondarylithium solar cells. Compared with Ni-Cd batteries and Ni-MH batteries, which are widely used at present, secondary lithium solar cells have the highest energy density and still have great development potential.