Electrochemical Behavior of LiV3O8 in Aqueous Li2SO4 Solution

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

ELECTROCHEMISTRY AND NEW ENERGY

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Electrochemical Behavior of LiV₃O₈ in Aqueous Li₂SO₄ Solution

LIU Li^1,2, TIAN Fang-Hua¹, WANG Xian-You^1,2, ZHOU Meng¹
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

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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 LiNi_1/3Co_1/3Mn_1/3O₂ 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).

Keywords: Aqueous rechargeable lithium battery LiV₃O₈ Li₂SO₄ aqueous solution Aqueous electrolyte Electrochemical property
Received: 2011-07-13 Accepted: 2011-09-09 Publication Date (Web): 2011-09-15
Corresponding Authors: LIU Li Email: liuli@xtu.edu.cn

Fund: 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).

Cite this article: LIU Li, TIAN Fang-Hua, WANG Xian-You, ZHOU Meng. Electrochemical Behavior of LiV₃O₈ in Aqueous Li₂SO₄ Solution[J]. Acta Phys. -Chim. Sin., 2011,27 (11): 2600-2604. doi: 10.3866/PKU.WHXB20111126

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