Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2
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...
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2014-08-01
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doaj-19d7d5f5c637415ca721e9b7af4d86e02020-11-24T20:58:46ZengElsevierProgress in Natural Science: Materials International1002-00712014-08-0124438839610.1016/j.pnsc.2014.07.005Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2Daichun Tang0Daotan Liu1Yanyan Liu2Zhenzhong Yang3Liquan Chen4Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaChina Electric Power Research Institute, Beijing 100192, ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaThe 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.http://www.sciencedirect.com/science/article/pii/S1002007114000926Lithium-richElectrochemical activationSurface structureSTEM imaging |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daichun Tang Daotan Liu Yanyan Liu Zhenzhong Yang Liquan Chen |
spellingShingle |
Daichun Tang Daotan Liu Yanyan Liu Zhenzhong Yang Liquan Chen Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 Progress in Natural Science: Materials International Lithium-rich Electrochemical activation Surface structure STEM imaging |
author_facet |
Daichun Tang Daotan Liu Yanyan Liu Zhenzhong Yang Liquan Chen |
author_sort |
Daichun Tang |
title |
Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 |
title_short |
Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 |
title_full |
Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 |
title_fullStr |
Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 |
title_full_unstemmed |
Investigation on the electrochemical activation process of Li1.20Ni0.32Co0.004Mn0.476O2 |
title_sort |
investigation on the electrochemical activation process of li1.20ni0.32co0.004mn0.476o2 |
publisher |
Elsevier |
series |
Progress in Natural Science: Materials International |
issn |
1002-0071 |
publishDate |
2014-08-01 |
description |
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. |
topic |
Lithium-rich Electrochemical activation Surface structure STEM imaging |
url |
http://www.sciencedirect.com/science/article/pii/S1002007114000926 |
work_keys_str_mv |
AT daichuntang investigationontheelectrochemicalactivationprocessofli120ni032co0004mn0476o2 AT daotanliu investigationontheelectrochemicalactivationprocessofli120ni032co0004mn0476o2 AT yanyanliu investigationontheelectrochemicalactivationprocessofli120ni032co0004mn0476o2 AT zhenzhongyang investigationontheelectrochemicalactivationprocessofli120ni032co0004mn0476o2 AT liquanchen investigationontheelectrochemicalactivationprocessofli120ni032co0004mn0476o2 |
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