A concept of using two non-prelithiated metal oxides (e.g., MnO2, V2O5, and FeOx) in both positive and negative electrodes in organic Li-ion electrolytes has been proposed and tested to improve the energy density of pseudocapacitors. To take the advantages of this concept, additional lithium source is essential to provide lithium ions during the charge-discharge cycles. The stabilized lithium metal powder (SLMP™) developed by FMC Corp., provides such an essential Li+ source. Here we report the first result of the symmetric pseudocapacitor using two non-prelithiated metal oxide (i.e., manganese oxide/carbon nanotube (MnO2/CNT)) electrodes, with added SLMP in one of them. The capacitor using the SLMP added MnO2/CNT (positive) and pure MnO2/CNT (negative) electrode in 1.2 M LiPF6-EC:EMC electrolyte shows supercapacitive behaviors in 3.0 V voltage range. The addition of SLMP opens new opportunities of using the non-lithiated metal oxide electrodes in pseudocapacitors and hybrid electrochemical capacitors (ECs), which has not been possible before.
Bibliographical noteFunding Information:
The work at Yonsei University was supported by the Korea Science & Engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (No. R0A-2007-000-10042-0). The work at Brookhaven National Lab. was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, under the program of “Hybrid and Electric Systems”, of the US Department of Energy under Contract Number DEAC02-98CH10886. This work was also supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (KRF-2008-331-D00248).
All Science Journal Classification (ASJC) codes