LiV3O8在Li2SO4水溶液中的电化学性能

引用本文: 刘黎, 田方华, 王先友, 周萌. LiV₃O₈在Li₂SO₄水溶液中的电化学性能[J]. 物理化学学报, 2011, 27(11): 2600-2604. doi: 10.3866/PKU.WHXB20111126 shu

Citation: LIU Li, TIAN Fang-Hua, WANG Xian-You, ZHOU Meng. Electrochemical Behavior of LiV₃O₈ in Aqueous Li₂SO₄ Solution[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2600-2604. doi: 10.3866/PKU.WHXB20111126 shu

LiV₃O₈在Li₂SO₄水溶液中的电化学性能

基金项目:
国家自然科学基金(20871101) (20871101)

湖南省教育厅项目(10C1250) (10C1250)

湖南省自然科学基金(11JJ4038) (11JJ4038)

湖南省科技厅项目(2010RS4027)资助 (2010RS4027)

摘要: 采用低温固相法合成了具有纳米结构的LiV₃O₈材料. 扫描电子显微镜(SEM)及透射电子显微镜(TEM)测试显示该材料具有纳米结构. X 射线衍射(XRD)表明该材料属于单斜晶系, P2₁/m空间群. 并采用循环伏安法(CV)及电化学阻抗谱图测试对该材料在1、2 mol·L^-1 Li₂SO₄ 水溶液及饱和Li₂SO₄ 水溶液中的电化学行为进行了研究. 结果表明, LiV₃O₈ 在饱和Li₂SO₄ 水溶液中具有最好的电化学性能. 以LiV₃O₈ 作为负极材料, LiNi_1/3Co_1/3Mn_1/3O₂作为正极材料, 饱和Li₂SO₄水溶液作为电解液组成了水性锂离子电池, 进行恒流充放电测试, 结果表明, 在0.5C (1C=300 mA·g^-1)的充放电倍率下, 该水性锂离子电池的首次放电比容量为95.2 mAh·g^-1, 循环100次后仍具有37.0 mAh·g^-1的放电比容量.

关键词:

English

Electrochemical Behavior of LiV₃O₈ in Aqueous Li₂SO₄ Solution

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 Date: 13 July 2011
Available Online: 27 October 2011
Fund Project:
国家自然科学基金(20871101)

湖南省教育厅项目(10C1250)

湖南省自然科学基金(11JJ4038)

湖南省科技厅项目(2010RS4027)资助

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 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).

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

LiV₃O₈在Li₂SO₄水溶液中的电化学性能

English

Electrochemical Behavior of LiV₃O₈ in Aqueous Li₂SO₄ Solution

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