Effect of doping cation valencies on low temperature performance of LiFePO 4/C

Ning Li; Borong Wu; Chuanxiong Zhou; Yonghuan Ren; Chunwei Yang; Jingwen Yao; Feng Wu

doi:10.4028/www.scientific.net/AMR.391-392.935

Effect of doping cation valencies on low temperature performance of LiFePO ₄/C

Ning Li^*, Borong Wu, Chuanxiong Zhou, Yonghuan Ren, Chunwei Yang, Jingwen Yao, Feng Wu

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

The doped and undoped LiFePO ₄/C samples are prepared by two-step solid-state reaction. The X Ray Diffraction (XRD) results indicate that metal ions are successfully doped in LiFePO ₄ without any unexpected phase. The Scanning Electron Microscope (SEM) shows that the particle morphologies of samples are near-spherical with about 200-300nm size which can be observed in all samples. The electrochemical tests indicate that doping oversize ions will increase electrode polarization. The limitation of the Li+ migration is intensified by doping metal ions with high valence. LiFePO ₄/C samples doped with Mn ²⁺ and Ti ⁴⁺ behave better at low temperature, especially the one doped with Ti ⁴⁺. Battery with this Ti ⁴⁺ doped material can yield 77mAhg-1 when discharge at-20°C and 0.5C, about 26mAhg-1 higher than the undoped one.

Original language	English
Title of host publication	Chemical Engineering and Material Properties
Pages	935-939
Number of pages	5
DOIs	https://doi.org/10.4028/www.scientific.net/AMR.391-392.935
Publication status	Published - 2012
Event	2011 International Symposium on Chemical Engineering and Material Properties, ISCEMP 2011 - Shenyang, Liaoning, China Duration: 4 Nov 2011 → 6 Nov 2011

Publication series

Name	Advanced Materials Research
Volume	391-392
ISSN (Print)	1022-6680

Conference

Conference	2011 International Symposium on Chemical Engineering and Material Properties, ISCEMP 2011
Country/Territory	China
City	Shenyang, Liaoning
Period	4/11/11 → 6/11/11

Keywords

Cathode
Cation doping
LiFePO

Access to Document

10.4028/www.scientific.net/AMR.391-392.935

Cite this

Li, N., Wu, B., Zhou, C., Ren, Y., Yang, C., Yao, J., & Wu, F. (2012). Effect of doping cation valencies on low temperature performance of LiFePO ₄/C. In Chemical Engineering and Material Properties (pp. 935-939). (Advanced Materials Research; Vol. 391-392). https://doi.org/10.4028/www.scientific.net/AMR.391-392.935

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title = "Effect of doping cation valencies on low temperature performance of LiFePO 4/C",

abstract = "The doped and undoped LiFePO 4/C samples are prepared by two-step solid-state reaction. The X Ray Diffraction (XRD) results indicate that metal ions are successfully doped in LiFePO 4 without any unexpected phase. The Scanning Electron Microscope (SEM) shows that the particle morphologies of samples are near-spherical with about 200-300nm size which can be observed in all samples. The electrochemical tests indicate that doping oversize ions will increase electrode polarization. The limitation of the Li+ migration is intensified by doping metal ions with high valence. LiFePO 4/C samples doped with Mn 2+ and Ti 4+ behave better at low temperature, especially the one doped with Ti 4+. Battery with this Ti 4+ doped material can yield 77mAhg-1 when discharge at-20°C and 0.5C, about 26mAhg-1 higher than the undoped one.",

keywords = "Cathode, Cation doping, LiFePO",

author = "Ning Li and Borong Wu and Chuanxiong Zhou and Yonghuan Ren and Chunwei Yang and Jingwen Yao and Feng Wu",

year = "2012",

doi = "10.4028/www.scientific.net/AMR.391-392.935",

language = "English",

isbn = "9783037853337",

series = "Advanced Materials Research",

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booktitle = "Chemical Engineering and Material Properties",

note = "2011 International Symposium on Chemical Engineering and Material Properties, ISCEMP 2011 ; Conference date: 04-11-2011 Through 06-11-2011",

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Li, N, Wu, B, Zhou, C, Ren, Y, Yang, C, Yao, J & Wu, F 2012, Effect of doping cation valencies on low temperature performance of LiFePO ₄/C. in Chemical Engineering and Material Properties. Advanced Materials Research, vol. 391-392, pp. 935-939, 2011 International Symposium on Chemical Engineering and Material Properties, ISCEMP 2011, Shenyang, Liaoning, China, 4/11/11. https://doi.org/10.4028/www.scientific.net/AMR.391-392.935

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T1 - Effect of doping cation valencies on low temperature performance of LiFePO 4/C

AU - Li, Ning

AU - Wu, Borong

AU - Zhou, Chuanxiong

AU - Ren, Yonghuan

AU - Yang, Chunwei

AU - Yao, Jingwen

AU - Wu, Feng

PY - 2012

Y1 - 2012

N2 - The doped and undoped LiFePO 4/C samples are prepared by two-step solid-state reaction. The X Ray Diffraction (XRD) results indicate that metal ions are successfully doped in LiFePO 4 without any unexpected phase. The Scanning Electron Microscope (SEM) shows that the particle morphologies of samples are near-spherical with about 200-300nm size which can be observed in all samples. The electrochemical tests indicate that doping oversize ions will increase electrode polarization. The limitation of the Li+ migration is intensified by doping metal ions with high valence. LiFePO 4/C samples doped with Mn 2+ and Ti 4+ behave better at low temperature, especially the one doped with Ti 4+. Battery with this Ti 4+ doped material can yield 77mAhg-1 when discharge at-20°C and 0.5C, about 26mAhg-1 higher than the undoped one.

AB - The doped and undoped LiFePO 4/C samples are prepared by two-step solid-state reaction. The X Ray Diffraction (XRD) results indicate that metal ions are successfully doped in LiFePO 4 without any unexpected phase. The Scanning Electron Microscope (SEM) shows that the particle morphologies of samples are near-spherical with about 200-300nm size which can be observed in all samples. The electrochemical tests indicate that doping oversize ions will increase electrode polarization. The limitation of the Li+ migration is intensified by doping metal ions with high valence. LiFePO 4/C samples doped with Mn 2+ and Ti 4+ behave better at low temperature, especially the one doped with Ti 4+. Battery with this Ti 4+ doped material can yield 77mAhg-1 when discharge at-20°C and 0.5C, about 26mAhg-1 higher than the undoped one.

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KW - Cation doping

KW - LiFePO

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