Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (11): 2600-2604.doi: 10.3866/PKU.WHXB20111126

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Electrochemical Behavior of LiV3O8 in Aqueous Li2SO4 Solution

LIU Li1,2, TIAN Fang-Hua1, WANG Xian-You1,2, ZHOU Meng1   

  1. 1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan 411105, Hunan Province, P. R. China;
    2. Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan 411105, Hunan Province, P. R. China
  • Received:2011-07-13 Revised:2011-09-09 Published:2011-10-27
  • Contact: LIU Li
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20871101), Scientific Research Fund of Hunan Provincial Education Department, China (10C1250), Natural Science Foundation of Hunan Province, China (11JJ4038), and Scientific Research Fund of Hunan Provincial Science & Technology Department, China (2010RS4027).

Abstract: Nanostructured LiV3O8 powder was synthesized by a low-temperature solid-state method. Scanning election microscopy (SEM) and transmission electron microscopy (TEM) show that the as-prepared material is composed of nanostructured particles. X-ray diffraction (XRD) measurements indicate that the as-prepared material has a monoclinic structure with a space group of P21/m. The electrochemical properties of the LiV3O8 electrodes in 1 mol·L-1 Li2SO4, 2 mol·L-1 Li2SO4, and saturated Li2SO4 aqueous electrolytes were studied using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in this work. The results show that the LiV3O8 electrode in the saturated Li2SO4 electrolyte has the best electrochemical properties. An aqueous rechargeable lithium battery (ARLB) containing a LiV3O8 anode, a LiNi1/3Co1/3Mn1/3O2 cathode, and a saturated Li2SO4 electrolyte was fabricated. The battery delivered an initial capacity of 95.2 mAh·g-1 and retained a capacity of 37.0 mAh·g-1 after 100 cycles at a charge-discharge rate of 0.5C (1C=300 mA·g-1).

Key words: Aqueous rechargeable lithium battery, LiV3O8, Li2SO4 aqueous solution, Aqueous electrolyte, Electrochemical property


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