Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2

Daichun Tang; Daotan Liu; Yanyan Liu; Zhenzhong Yang; Liquan Chen

doi:10.1016/j.pnsc.2014.07.005

Investigation on the electrochemical activation process of Li_1.20Ni_0.32Co_0.004Mn_0.476O₂

Daichun Tang
, Daotan Liu
, Yanyan Liu^*
, Zhenzhong Yang
, Liquan Chen

^*Corresponding author for this work

CAS - Institute of Physics
State Grid Corporation of China

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

12 Scopus citations

Abstract

The lithium-rich layered oxides are one of the most attractive cathode materials for lithium-ion batteries. Here, two types of Li_1.20Ni_0.32Co_0.004Mn_0.476O₂ were synthesized using Li₂CO₃ and LiOH as lithium sources. An electrochemical activation process occurs in Li_1.2Ni_0.32Co_0.004Mn_0.476O₂ prepared from Li₂CO₃ (LLO-1), while no obvious activation in Li_1.2Ni_0.32Co_0.004Mn_0.476O₂ prepared from LiOH (LLO-2) is observed. Via advanced scanning transmission electron microscopy (STEM), we found that Li₂MnO₃-like structure is rich in the surface region of LLO-2. The study provides a direct explanation for the electrochemical activation of lithium-rich materials. The sample with more LiMO₂-like phase at the surface region shows a better cycling performance. It is likely that more LiMO₂-like phase at the surface region could stabilize the interface and improve the cycling performance of the Li-rich cathode materials.

Original language	English
Pages (from-to)	388-396
Number of pages	9
Journal	Progress in Natural Science: Materials International
Volume	24
Issue number	4
DOIs	https://doi.org/10.1016/j.pnsc.2014.07.005
State	Published - 2014
Externally published	Yes

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Keywords

Electrochemical activation
Lithium-rich
STEM imaging
Surface structure

Access to Document

10.1016/j.pnsc.2014.07.005

Cite this

@article{9d3d50dc38d5490c81ee06bebc53dbf2,

title = "Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2",

abstract = "The lithium-rich layered oxides are one of the most attractive cathode materials for lithium-ion batteries. Here, two types of Li1.20Ni0.32Co0.004Mn0.476O2 were synthesized using Li2CO3 and LiOH as lithium sources. An electrochemical activation process occurs in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from Li2CO3 (LLO-1), while no obvious activation in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from LiOH (LLO-2) is observed. Via advanced scanning transmission electron microscopy (STEM), we found that Li2MnO3-like structure is rich in the surface region of LLO-2. The study provides a direct explanation for the electrochemical activation of lithium-rich materials. The sample with more LiMO2-like phase at the surface region shows a better cycling performance. It is likely that more LiMO2-like phase at the surface region could stabilize the interface and improve the cycling performance of the Li-rich cathode materials.",

keywords = "Electrochemical activation, Lithium-rich, STEM imaging, Surface structure",

author = "Daichun Tang and Daotan Liu and Yanyan Liu and Zhenzhong Yang and Liquan Chen",

note = "Publisher Copyright: {\textcopyright} 2014 Chinese Materials Research Society.",

year = "2014",

doi = "10.1016/j.pnsc.2014.07.005",

language = "英语",

volume = "24",

pages = "388--396",

journal = "Progress in Natural Science: Materials International",

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TY - JOUR

T1 - Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2

AU - Tang, Daichun

AU - Liu, Daotan

AU - Liu, Yanyan

AU - Yang, Zhenzhong

AU - Chen, Liquan

PY - 2014

Y1 - 2014

N2 - The lithium-rich layered oxides are one of the most attractive cathode materials for lithium-ion batteries. Here, two types of Li1.20Ni0.32Co0.004Mn0.476O2 were synthesized using Li2CO3 and LiOH as lithium sources. An electrochemical activation process occurs in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from Li2CO3 (LLO-1), while no obvious activation in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from LiOH (LLO-2) is observed. Via advanced scanning transmission electron microscopy (STEM), we found that Li2MnO3-like structure is rich in the surface region of LLO-2. The study provides a direct explanation for the electrochemical activation of lithium-rich materials. The sample with more LiMO2-like phase at the surface region shows a better cycling performance. It is likely that more LiMO2-like phase at the surface region could stabilize the interface and improve the cycling performance of the Li-rich cathode materials.

AB - The lithium-rich layered oxides are one of the most attractive cathode materials for lithium-ion batteries. Here, two types of Li1.20Ni0.32Co0.004Mn0.476O2 were synthesized using Li2CO3 and LiOH as lithium sources. An electrochemical activation process occurs in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from Li2CO3 (LLO-1), while no obvious activation in Li1.2Ni0.32Co0.004Mn0.476O2 prepared from LiOH (LLO-2) is observed. Via advanced scanning transmission electron microscopy (STEM), we found that Li2MnO3-like structure is rich in the surface region of LLO-2. The study provides a direct explanation for the electrochemical activation of lithium-rich materials. The sample with more LiMO2-like phase at the surface region shows a better cycling performance. It is likely that more LiMO2-like phase at the surface region could stabilize the interface and improve the cycling performance of the Li-rich cathode materials.

KW - Electrochemical activation

KW - Lithium-rich

KW - STEM imaging

KW - Surface structure

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U2 - 10.1016/j.pnsc.2014.07.005

DO - 10.1016/j.pnsc.2014.07.005

M3 - 文章

AN - SCOPUS:84926417540

SN - 1002-0071

VL - 24

SP - 388

EP - 396

JO - Progress in Natural Science: Materials International

JF - Progress in Natural Science: Materials International

IS - 4

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