The investigation of Ti-modified LiCoO2 materials for lithium ion battery

Jinpeng Yu; Zenghui Han; Xiaohong Hu; Hui Zhan; Yunhong Zhou; Xingjiang Liu

doi:10.1016/j.jpowsour.2014.03.073

The investigation of Ti-modified LiCoO₂ materials for lithium ion battery

Jinpeng Yu, Zenghui Han, Xiaohong Hu, Hui Zhan^*, Yunhong Zhou, Xingjiang Liu

^*Corresponding author for this work

Research Organization for Nano & Life Innovation

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

EDAX measurement reveals that the atomic ratio of Ti/(Ti + Co) is much higher than the mole feed ratios in the preparation for the LiCo _0.99Ti_0.01O₂ material. XPS observation further tells that in LiCo_0.998Ti_0.002O₂ phase with quite low Ti amount, almost no Ti can enter into the LiCoO₂ lattice, it is more inclined to enrich in the particle surface. Electrochemical examinations show that the cycling stability of LiCo_0.998Ti _0.002O₂ is as good as that of LiCoO₂/LiCo _0.99Ti_0.01O₂ composite between 3.0 and 4.3 V, and the latter has a better rate performance. It is considered that the difference of the high rate performance between the Ti-modified LiCoO ₂ materials is more likely to originate from the different particle characteristics, when their Ti amounts are low enough.

Original language	English
Pages (from-to)	136-139
Number of pages	4
Journal	Journal of Power Sources
Volume	262
DOIs	https://doi.org/10.1016/j.jpowsour.2014.03.073
Publication status	Published - 2014 Sept 15

Keywords

Core-shell structure
Doping
Lithium batteries
Rate performance

ASJC Scopus subject areas

Electrical and Electronic Engineering
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Physical and Theoretical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2014.03.073

Cite this

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title = "The investigation of Ti-modified LiCoO2 materials for lithium ion battery",

abstract = "EDAX measurement reveals that the atomic ratio of Ti/(Ti + Co) is much higher than the mole feed ratios in the preparation for the LiCo 0.99Ti0.01O2 material. XPS observation further tells that in LiCo0.998Ti0.002O2 phase with quite low Ti amount, almost no Ti can enter into the LiCoO2 lattice, it is more inclined to enrich in the particle surface. Electrochemical examinations show that the cycling stability of LiCo0.998Ti 0.002O2 is as good as that of LiCoO2/LiCo 0.99Ti0.01O2 composite between 3.0 and 4.3 V, and the latter has a better rate performance. It is considered that the difference of the high rate performance between the Ti-modified LiCoO 2 materials is more likely to originate from the different particle characteristics, when their Ti amounts are low enough.",

keywords = "Core-shell structure, Doping, Lithium batteries, Rate performance",

author = "Jinpeng Yu and Zenghui Han and Xiaohong Hu and Hui Zhan and Yunhong Zhou and Xingjiang Liu",

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T1 - The investigation of Ti-modified LiCoO2 materials for lithium ion battery

AU - Yu, Jinpeng

AU - Han, Zenghui

AU - Hu, Xiaohong

AU - Zhan, Hui

AU - Zhou, Yunhong

AU - Liu, Xingjiang

PY - 2014/9/15

Y1 - 2014/9/15

N2 - EDAX measurement reveals that the atomic ratio of Ti/(Ti + Co) is much higher than the mole feed ratios in the preparation for the LiCo 0.99Ti0.01O2 material. XPS observation further tells that in LiCo0.998Ti0.002O2 phase with quite low Ti amount, almost no Ti can enter into the LiCoO2 lattice, it is more inclined to enrich in the particle surface. Electrochemical examinations show that the cycling stability of LiCo0.998Ti 0.002O2 is as good as that of LiCoO2/LiCo 0.99Ti0.01O2 composite between 3.0 and 4.3 V, and the latter has a better rate performance. It is considered that the difference of the high rate performance between the Ti-modified LiCoO 2 materials is more likely to originate from the different particle characteristics, when their Ti amounts are low enough.

AB - EDAX measurement reveals that the atomic ratio of Ti/(Ti + Co) is much higher than the mole feed ratios in the preparation for the LiCo 0.99Ti0.01O2 material. XPS observation further tells that in LiCo0.998Ti0.002O2 phase with quite low Ti amount, almost no Ti can enter into the LiCoO2 lattice, it is more inclined to enrich in the particle surface. Electrochemical examinations show that the cycling stability of LiCo0.998Ti 0.002O2 is as good as that of LiCoO2/LiCo 0.99Ti0.01O2 composite between 3.0 and 4.3 V, and the latter has a better rate performance. It is considered that the difference of the high rate performance between the Ti-modified LiCoO 2 materials is more likely to originate from the different particle characteristics, when their Ti amounts are low enough.

KW - Core-shell structure

KW - Doping

KW - Lithium batteries

KW - Rate performance

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