• 제목/요약/키워드: electrochemical discharge

검색결과 801건 처리시간 0.03초

리튬 폴리머 전지용 LiMnO$_2$의 합성조건에 따른 충방전 특성 (Charge/discharge Properties As a Function of Synthetic Conditions of LiMnO$_2$ for Lithium Polymer Batteries)

  • 조영재;김종욱;박계춘;위성동;구할본
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2001년도 추계학술대회 논문집
    • /
    • pp.541-544
    • /
    • 2001

  • Orthorhombic LiMnO$_2$ was synthesized by solid-state reaction using LiOH$.$H$_2$O and Mn$_2$O$_3$ as starting material. Its electrochemical properties as cathode in lithium batteries were examined. X-ray diffraction revealed that the LiMnO$_2$ compound showed a well-defined orthorhombic phase of a space group with Pmnm. The capacity of LiMnO$_2$ agreed well with its specific surface area and grinding treatment was effective in improving cycling performance. For lithium polymer battery applications, the LiMnO$_2$ cell was characterized electrochemically by charge-discharge experiments. And the relationship between the characteristics of powder and electrochemical properties was studied in this research. A maximum discharge capacity of 160-170mAhg$^{-1}$ for LiMnO$_2$/Li cell was achieved

  • PDF

활성탄소 전극의 전기화학적 특성에 대한 카본블랙 함입된 탄소나노튜브의 효과 (Influence of Carbon Black-embed Carbon Nanotubes on Electrochemical Performance of Activated Carbon-based Electrodes)

  • 김기석;박수진
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 한국신재생에너지학회 2010년도 춘계학술대회 초록집
    • /
    • pp.133.1-133.1
    • /
    • 2010

  • In this work, carbon black(CBs)-embed multi-walled carbon nanotubes (MWNTs) as conductive fillers for activated carbon(ACs)-based electrodes for supercapacitor were prepared by chemical reduction of oxidized MWNTs and CBs. The effect of CBs-MWNT composites on electrochemical performances of ACs-based electrodes were investigated as a function of CB-MWNT ratio. It was found that CBs-MWNTs composites were formed by the reduction reaction of the functional groups of oxidized MWNTs and CBs. It was resulted in the conjugation of CBs onto the MWNT having high surface area and aspect ratio, leading to the enhanced electrical properties of MWNTs. The electrochemical performances, such as current density, charge-discharge, and specific capacitance of the ACs/CBs-MWNT electrodes were higher than that of ACs/MWNTs and conventional ACs/CB electrodes, which was attributed to the synergistic effect of CBs-MWNTs as a conductive filler.

  • PDF