Lithium Amount Effect
of Li-Inserted Ultra-Surface
Area-Activated Carbon and Improvement of the Electrochemical Performance
with Magnetic Field for Li-Ion Capacitors
posted on 2022-12-16, 12:34authored byZambaga Otgonbayar, Yonrapach Areerob, Sunhye Yang, Ick-Jun Kim, Won-Chun Oh
It is possible that controlling the lithium-ion amount
may relate
to the high energy and the specific capacitance of active materials
into a single device. As the cathode for Li-ion capacitors (LICs)
using nonaqueous electrolytes, we investigated surface functionalization
of ultra-surface area-activated carbon (UAC) powder. An increase in
capacitance was observed, from 1.25 × 104 to 8.10
× 104 F/g with controlling of lithium amount, as well
as an increase in the area explicit capacitance per BET surface region
from 657.57 to 1605.25 m2/g, which indicates that redox
responses and their remarkable potential might enhance the capacitance
for LICs. The pseudocapacitive redox reaction at CO destinations
is mostly attributed to capacitance enhancement. As with the improvement
in capacitance, it was discovered that the arrangement of the electrolytes
depends on the wetting behavior and particle size that can be adjusted.
This study suggests the way for a low-cost and widely used UAC powder
with controlling of lithium amount and a magnetic field for LICs.
The 6LUAC samples treated with a magnetic field showed excellent specific
capacity and energy density compared to samples not treated with a
magnetic field under the same test conditions. Finally, we expect
that this method may contribute to improvement of the electrochemical
performance of materials.