https://scholars.lib.ntu.edu.tw/handle/123456789/631001
Title: | Low-Pressure Argon/Hydrogen/Oxygen Plasma Treatment on LiMn2O4 Li-Ion Hybrid Supercapacitors | Authors: | Chen, Hong Kai Ni, I. Chih CHIH-I WU I-CHUN CHENG JIAN-ZHANG CHEN |
Keywords: | SURFACE MODIFICATION; HIGH-PERFORMANCE; CATHODE MATERIAL; ENERGY-STORAGE; CARBON; ELECTRODES; HYDROGEN; XPS; TEMPERATURE; PARTICLES | Issue Date: | 1-Apr-2023 | Publisher: | ELECTROCHEMICAL SOC INC | Journal Volume: | 12 | Journal Issue: | 4 | Source: | ECS Journal of Solid State Science and Technology | Abstract: | LiCl + Mn(NO3)2·4H2O pastes are screen-printed on a carbon cloth substrate and then calcined at 400 °C for 6 h in a tube furnace to convert them into LiMn2O4. Ar, Ar+5%H2, or Ar+5%O2 low-pressure plasma is then used to treat the LiMn2O4/carbon cloth. The treated LiMn2O4/carbon cloth is then used as the electrode for a Li-ion hybrid supercapacitors (Li-HSCs) with a three-electrode configuration in 1-M Li2SO4 liquid electrolyte. Ag/AgCl and Pt electrodes were used as reference and counter electrodes, respectively. Li-HSCs are characterized by galvanostatic charging/discharging, cyclic voltammetry, and electrochemical impedance spectroscopy. The results indicate that plasma treatment improves the Li-HSCs performance. In particular, Ar+5%O2 plasma treatment increases the areal capacity by ∼24% to 23.12 μA h cm−2. It also improves the coulomb efficiency and capacity retention rate of LiMn2O4 Li-HSCs. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/631001 | ISSN: | 21628769 | DOI: | 10.1149/2162-8777/acc7c5 |
Appears in Collections: | 光電工程學研究所 |
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