| Posted: Apr 21, 2017 |
Electrochemical performance of lithium-ion capacitors
(Nanowerk News) How do internal short circuit? Researcher Minho Kim has published his paper in Nano ("Electrochemical Performance of Lithium-Ion Capacitors Using Pre-Lithiated Multiwalled Carbon Nanotubes as Anode").
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Internal short-circuit method (ISC) is also called direct contact (DC) method. The pre-lithiated can achieved through direct physical contact between negative electrode and lithium metal with electrolyte in pressure.
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| This image shows the electrochemical performance of lithium-ion capacitors using pre-lithiated multiwalled carbon nanotubes as anode. (Image: Nanchang University)
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In this method, the pre-lithiation process was completed by a self-discharge mechanism. Electrons will pass through the contact point between the lithium metal and anode in the effect of potential difference. The process of ISC is simple, fast and controllable.
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In this paper, Pre-lithiated multiwalled carbon nanotubes and activated carbon(AC) materials were used as anode and cathode respectively for Lithium-ion capacitors (LICs). Pre-lithiated multiwalled carbon nanotube anode was prepared by internal short circuit approach (ISC).
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LICs have higher power density than lithium-ion batteries and higher energy density than the electric double layer capacitors(EDLCs). LICs are capable of storing approximately 5 times energy higher than conventional EDLCs.
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LICs were considered to be one of the best energy storage device, which is expected to have broad prospects in electric cars, solar energy, wind energy and other areas.
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