High-voltage performance of concentration-gradient Li[Ni0 67Co0 15Mn0 18]O-2 cathode material for lithium-ion batteries

Title
High-voltage performance of concentration-gradient Li[Ni0 67Co0 15Mn0 18]O-2 cathode material for lithium-ion batteries
Author
선양국
Keywords
Concentration-gradient; Li[Ni0 67Co0 15Mn0 18]O-2; High capacity; Cathode material; Thermal stability; Lithium batteries
Issue Date
2010-12-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v. 55, no. 28, page. 8621-8627
Abstract
A novel Li[Ni0 67Co0 15Mn0 18]O-2 cathode material encapsulated completely within a concentration-gradient shell was successfully synthesized via co-precipitation The Li[Ni0 67Co0 15Mn0 18]O-2 has a core of Li[Ni0 8Co0 15Mn0 05]O-2 that is rich in Ni a concentration-gradient shell having decreasing Ni concentration and increasing Mn concentration toward the particle surface and a stable outer-layer of Li[Ni0 57Co0 15Mn0 28]O-2 The electrochemical and thermal properties of the material were investigated and compared to those of the core Li[Ni0 8Co0 15Mn0 05]O-2 material alone The discharge capacity of the concentration-gradient Li[Ni0 67Co0 15Mn0 18]O-2 electrode increased with increasing upper cutoff voltage to 4 5 V and cells with this cathode material delivered a very high capacity 213 mAh/g with excellent cycling stability even at 55 C The enhanced thermal and lithium intercalation stability of the Li[Ni0 67Co0 15Mn0 18]O-2 was attributed to the gradual no ease in tetravalent Mn concentration and decrease in Ni concentration in the concentration-gradient shell layer (C) 2010 Elsevier Ltd All rights reserved
URI
http://repository.hanyang.ac.kr/handle/20.500.11754/79836https://linkinghub.elsevier.com/retrieve/pii/S0013468610010212
ISSN
0013-4686
DOI
10.1016/j.electacta.2010.07.074
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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