| Nanostructured high-energy cathode materials for advanced lithium batteries. | |
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MedLine Citation:
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PMID: 23042415 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Nickel-rich layered lithium transition-metal oxides, LiNi(1-x)M(x)O(2) (M = transition metal), have been under intense investigation as high-energy cathode materials for rechargeable lithium batteries because of their high specific capacity and relatively low cost. However, the commercial deployment of nickel-rich oxides has been severely hindered by their intrinsic poor thermal stability at the fully charged state and insufficient cycle life, especially at elevated temperatures. Here, we report a nickel-rich lithium transition-metal oxide with a very high capacity (215 mA h g(-1)), where the nickel concentration decreases linearly whereas the manganese concentration increases linearly from the centre to the outer layer of each particle. Using this nano-functional full-gradient approach, we are able to harness the high energy density of the nickel-rich core and the high thermal stability and long life of the manganese-rich outer layers. Moreover, the micrometre-size secondary particles of this cathode material are composed of aligned needle-like nanosize primary particles, resulting in a high rate capability. The experimental results suggest that this nano-functional full-gradient cathode material is promising for applications that require high energy, long calendar life and excellent abuse tolerance such as electric vehicles. |
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Authors:
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Yang-Kook Sun; Zonghai Chen; Hyung-Joo Noh; Dong-Ju Lee; Hun-Gi Jung; Yang Ren; Steve Wang; Chong Seung Yoon; Seung-Taek Myung; Khalil Amine |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-07 |
Journal Detail:
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Title: Nature materials Volume: - ISSN: 1476-1122 ISO Abbreviation: Nat Mater Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101155473 Medline TA: Nat Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1] Department of WCU Energy Engineering, Hanyang University, Seoul 133-791, South Korea [2] Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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