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| SC technology is evolving to improve the overall performance. Hybrid capacitors have been developed – they use both SC and Li-ion technology. The result is so called lithium ion capacitor – as name suggests, it is more like a capacitor with some features of the Li-ion battery. The main advantage is elevated voltage: 3.8V rated voltage increases the specific energy narrowing the gap between SCs and LIBs. Future improvements using graphene materials could increase performance of SC, the same is true for LIBs. | SC technology is evolving to improve the overall performance. Hybrid capacitors have been developed – they use both SC and Li-ion technology. The result is so called lithium ion capacitor – as name suggests, it is more like a capacitor with some features of the Li-ion battery. The main advantage is elevated voltage: 3.8V rated voltage increases the specific energy narrowing the gap between SCs and LIBs. Future improvements using graphene materials could increase performance of SC, the same is true for LIBs. | ||
| + | To conclude this chapter see figure 14 - a Ragone plot which is an effective tool to graphically compare gravimetric energy density (specific energy) and gravimetric power density (specific power) of various energy storage elements. The lowest performance is at the bottom left corner while the highest performance is at the top right corner - a spot to be taken by future technologies. Given figure represents generalized performance - higher performing application specific technologies exist and are under continuous development. As can be seen fuel cell technology can provide the highest specific energy while capacitors can provide the highest specific power. However, Li-ion technology with its high specific energy and good specific power is the right choice for most mobile/ | ||
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