Please wait a minute...
Acta Physico-Chimica Sinica  2002, Vol. 18 Issue (08): 705-709    DOI: 10.3866/PKU.WHXB20020807
Determination of the Li+ Diffusion Coefficient in Graphite By the Method of the Ratio of Potentio-charge Capacity to Galvano-charge Capacity
Tang Xin-Cun;He Li-Ping;Chen Zong-Zhang;Xia Xi
College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082;Institute of Applied Chemistry, Xinjiang University, Wulumuqi 820046
Download:   PDF(1661KB) Export: BibTeX | EndNote (RIS)      

Abstract  A novel electrochemical method (RPG method) has been theoretically and experimentally developed to determine the diffusion coefficient of intercalary species within insertion-host materials on the basis of the spherical diffusion model. Theoretical results show that the diffusion coefficient D is dependent to the ratio (q) of the potentio-charge capacity to the galvano-charge capacity (abridged as RPG), the radius of insertion-host particle R, and the galvano-charge time tG. The RPG equation obtained is as D=R2/(15.36qtG)(q ≤ 0.5).Using this method, the values of the Li+ diffusion coefficient determined at different galvano-charge currents with 1.5 V cutoff voltage are all around the value of 1.060×10-10 cm2•s-1.This result indicates that the RPG method has a good reliability for determination of the diffusion coefficient. The Li+ diffusion coefficient in graphite has been reduced from 4.292×10-10 to 1.219×10-11 cm2•s-1 among the voltage range of 1.0~2.5 V (vs Li/Li+),respectively.

Key wordsRatio of potentio-charge capacity to galvano-charge capacity        Diffusion coefficient      Graphite      Lithium-ion batteries     
Received: 05 December 2001      Published: 15 August 2002
Corresponding Authors: Chen Zong-Zhang     E-mail:
Cite this article:

Tang Xin-Cun;He Li-Ping;Chen Zong-Zhang;Xia Xi. Determination of the Li+ Diffusion Coefficient in Graphite By the Method of the Ratio of Potentio-charge Capacity to Galvano-charge Capacity. Acta Physico-Chimica Sinica, 2002, 18(08): 705-709.

URL:     OR

[1] WANG Quan-Jun, SUN Hong-Juan, PENG Tong-Jiang, FENG Ming-Zhu. Structure Development during the Cation Exchange Processes of Graphite Oxide[J]. Acta Physico-Chimica Sinica, 2017, 33(2): 413-418.
[2] HUANG Jia-Jun, DONG Zhi-Jun, ZHANG Xu, YUAN Guan-Ming, CONG Ye, CUI Zheng-Wei, LI Xuan-Ke. Effects of Structure on Electrochemical Performances of Ribbon-Shaped Mesophase Pitch-Based Graphite Fibers[J]. Acta Physico-Chimica Sinica, 2016, 32(7): 1699-1707.
[3] WANG Jian-De, PENG Tong-Jiang, XIAN Hai-Yang, SUN Hong-Juan. Preparation and Supercapacitive Performance of Three-Dimensional Reduced Graphene Oxide/Polyaniline Composite[J]. Acta Physico-Chimica Sinica, 2015, 31(1): 90-98.
[4] WANG Jian-Tao, WANG Yao, HUANG Bin, YANG Juan-Yu, TAN Ao, LU Shi-Gang. Silicon Supported on Stable Si-O-C Skeleton in High-Performance Lithium-Ion Battery Anode Materials[J]. Acta Physico-Chimica Sinica, 2014, 30(2): 305-310.
[5] CHEN Chan-Juan, HU Zhong-Ai, HU Ying-Ying, LI Li, YANG Yu-Ying, AN Ning, LI Zhi-Min, WU Hong-Ying. SnO2/Graphite Nanosheet Composite Electrodes and Their Application in Supercapacitors[J]. Acta Physico-Chimica Sinica, 2014, 30(12): 2256-2262.
[6] WANG Jian-De, PENG Tong-Jiang, SUN Hong-Juan, HOU Yun-Dan. Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide's Appearance, Structure and Super Capacitor Performance[J]. Acta Physico-Chimica Sinica, 2014, 30(11): 2077-2084.
[7] WEN Yue-Hua, GAO Chen, CHENG Jie, PAN Jun-Qing, CAO Gao-Ping, YANG Yu-Sheng. Effect of Electrolyte on the Performance of Electrodes for an All Lead Flow Battery[J]. Acta Physico-Chimica Sinica, 2013, 29(11): 2354-2360.
[8] ZHU Qi-Rong, LI Hui-Qin, LI Ning, CHAI Jing, GAO Run-Gang, LIANG Qi. Nanotribological and Wear Properties of Graphene[J]. Acta Physico-Chimica Sinica, 2013, 29(07): 1582-1587.
[9] PAN Hui, ZHAO Tian, ZHANG Yu-Dong, ZHANG Zhi-Jun. Preparation, Characterization and Properties of Titania/Graphite Oxide Nanocomposite[J]. Acta Physico-Chimica Sinica, 2013, 29(03): 660-666.
[10] HU Ying-Ying, HU Zhong-Ai, ZHANG Ya-Jun, LU Ai-Lian, XU Huan, ZHANG Zi-Yu, YANG Yu-Ying, LI Li, WU Hong-Ying. Synthesis and Electrochemical Characterization of RuO2·xH2O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors[J]. Acta Physico-Chimica Sinica, 2013, 29(02): 305-310.
[11] FAN Cheng-Wei, ZHANG Xin, CHEN Sheng, WANG Hai-Fang, CAO Ao-Neng. Solution-Processable, Highly Conductive, Permanently Rippled Graphene Sheets[J]. Acta Physico-Chimica Sinica, 2012, 28(10): 2465-2470.
[12] SUN Ya-Ping, FAN Xin-Zhuang, LU Yong-Hong, XU Hai-Bo. Electrocatalytic Performance and Pseudo-Capacitive Characteristics of Modified Graphite Electrode with Fe3+/Fe2+ in H2SO4 Solution[J]. Acta Physico-Chimica Sinica, 2012, 28(03): 603-608.
[13] LIU Dong-Yang, CHENG Jie, PAN Jun-Qing, WEN Yue-Hua, CAO Gao-Ping, YANG Yu-Sheng. All-Lead Redox Flow Battery in a Fluoroboric Acid Electrolyte[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2571-2576.
[14] YUAN Wen-Hui, LI Bao-Qing, LI Li. Superior Graphene for Hydrogen Adsorption Prepared by the Improved Liquid Oxidation-Reduction Method[J]. Acta Physico-Chimica Sinica, 2011, 27(09): 2244-2250.
[15] GAO Wen-Chao, HUANG Tao, SHEN Yu-Dong, YU Ai-Shui. Phenolic Resin Coated Natural Graphite Oxide as an Anode Material for Lithium Ion Batteries[J]. Acta Physico-Chimica Sinica, 2011, 27(09): 2129-2134.