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Citation: HUANG Ke-Long, YANG Sai, LIU Su-Qin, WANG Hai-Bo. Kinetics of Electrode Processes of LiFePO₄ in Saturated Lithium Nitrate Solution[J]. Acta Physico-Chimica Sinica, ;2007, 23(01): 129-133. doi: 10.3866/PKU.WHXB20070127 shu

Kinetics of Electrode Processes of LiFePO₄ in Saturated Lithium Nitrate Solution

1.
College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, P. R. China

Received Date: 31 July 2006
Available Online: 8 January 2007

Kinetics of electrode processes of LiFePO4 in saturated LiNO3 solution was investigated by analyses of cyclic voltammetry (CV), charge/discharge test, and potentiostatic intermittent titration (PITT). The results showed that LiFePO4 had od electrochemical reversibility in saturated LiNO3 solution. The first discharge capacity was about 116.2 mAh•g−1, and its charge/discharge efficiency was 92%. The lithium diffusion coefficients, corresponding to anodic peak and cathodic peak in LiFePO4, obtained from CV were 4.3×10−11 cm2•s−1 and 3.8×10−11 cm2•s−1. The lithium diffusion coefficients obtained from PITT varied with potentials, and the lowest value was about 5.5×10−11 cm2•s−1, coinciding with the voltage plateau region in the charge curves.
- Aqueous lithium-ion battery;LiFePO4;Cyclic voltammetry;Potentiostatic intermittent titration technique;Diffusion coefficient
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沈阳化工大学材料科学与工程学院沈阳 110142

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Kinetics of Electrode Processes of LiFePO4 in Saturated Lithium Nitrate Solution

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Kinetics of Electrode Processes of LiFePO₄ in Saturated Lithium Nitrate Solution