Articles
  • Electrochemical properties of LiNi1-yGayO2 cathode materials synthesized by emulsion method
  • Woojin Leea, Sang-Jae Hanb and Bok-Hee Kima,*
  • a Process Development team, Semiconductor R&D Center, Samsung Electronics Co., LTD, Samsungjeonja-ro 1, Hwaseong-si, Gyeonggi-do 445-330, South Korea b Division of Advanced Materials Engineering, Hydrogen & Fuel Cell Research Center, Research Institute of Advanced materials Development, Chonbuk National University, 567 Baekje-daero, Dukjin-gu, Jeonju-city, Chonbuk 561-756, Korea
Abstract
Gallium doped LiNiO2, LiNi1-yGayO2, was synthesized using the emulsion method. The emulsion-derived powder was calcined at a temperature range of 650 to 850 oC for 1248 hrs. A single phase of LiNi1-yGayO2 was obtained at 650 oC. The optimum condition for the synthesis of LiNi1-yGayO2 was to be calcined at 700° oC for 36 hrs in an oxygen stream. The composition of LiNi0.990Ga0.010O2 showed the largest discharge capacity. The initial and final discharge capacities after 20 cycles were 167.3 mAh/g and 156.2 mAh/g, respectively. The fading rate was only 6.6% after 20 cycles of charge-discharge.

Keywords: Cathode material, LiNi1-yGayO2, Emulsion method, Charge-discharge

This Article

  • 2016; 17(1): 46-49

    Published on Jan 31, 2016