Details

Autor(en) / Beteiligte

• Arie, Arenst Andreas
• Kristianto, Hans
• Halim, Martin
• Lee, Joong Kee

Titel

Synthesis and modification of activated carbon originated from Indonesian local Orange peel for lithium ion Capacitor’s cathode

Ist Teil von

• Journal of solid state electrochemistry, 2017-05, Vol.21 (5), p.1331-1342

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2017

Quelle

SpringerLink

Beschreibungen/Notizen

• Lithium ion capacitor (LIC) is a novel hybrid capacitor technology that possesses a better performance than the conventional supercapacitor, such as EDLC and lithium ion battery. However, the overall performance of LIC is limited by activated carbon’s capacity as its cathode. This work is focused on synthesize of activated carbon from Indonesian local orange peel waste for LIC cathode and its modification to perform a good electrochemical performances. Activated carbon was synthesized by ZnCl 2 as impregnant with mass ratio of orange peel to ZnCl 2 1:2 for 1 h at 500 °C. The obtained activated carbon possessed large surface area (1200 m 2  g −1 ), higher than commercial activated carbon (Merck-p.a.) with surface area of 775.6 m 2  g −1 . Modification was done using wet oxidation method by utilizing HNO 3 65 %, H 2 SO 4 98 %, and H 2 O 2 30 %, with ratio 1:1 ( w /w). Electrochemical properties were studied by using half cell test pouch with Li metal as reference electrode and 1 M LiPF 6 (EC:EMC:DMC = 1:1:1) as electrolyte. Modification had successfully increased oxygen atoms in activated carbon samples. Surface-modified cells demonstrated a higher capacitance (almost twice in the galvanostatic test) than that of the unmodifed one due to the pseudocapacitance effect of oxygen functional groups. However, its electrochemical performance was unstable. The unmodified cell showed a stable performance with 56.3 F g −1 at current density of 0.3 mA g −1 and voltage window 2.5–4 V. Graphical abstract ᅟ