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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Spinel-Layered Core-Shell Cathode Materials for Li-Ion Batteries

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dc.contributor.author Cho, Yonghyun ko
dc.contributor.author Lee, Sanghan ko
dc.contributor.author Lee, Yongseok ko
dc.contributor.author Hong, Taeeun ko
dc.contributor.author Cho, Jaephil ko
dc.date.available 2014-04-10T01:13:36Z -
dc.date.created 2013-06-07 ko
dc.date.issued 2011-10 -
dc.identifier.citation ADVANCED ENERGY MATERIALS, v.1, no.5, pp.821 - 828 ko
dc.identifier.issn 1614-6832 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/2907 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=81355160310 ko
dc.description.abstract In an attempt to overcome the problems associated with LiNiO2, the solid solution series of lithium nickel-metal oxides, Li[Ni1-xMx]O-2 (with M = Co, Mn, Al, Ti, Mg, etc.), have been investigated as favorable cathode materials for high-energy and high-power lithium-ion batteries. However, along with the improvement in the electrochemical properties in Ni-based cathode materials, the thermal stability has been a great concern, and thus violent reaction of the cathode with the electrolyte needs to be avoided. Here, we report a heterostructured Li[Ni0.54Co0.12Mn0.34]O-2 cathode material which possesses both high energy and safety. The core of the particle is Li[Ni0.54Co0.12Mn0.34]O-2 with a layered phase (R3-m) and the shell, with a thickness of < 0.5 mu m, is a highly stable Li1+x[CoNixMn2-x](2)O-4 spinel phase (Fd-3m). The material demonstrates reversible capacity of 200 mAhg-1 and retains 95% capacity retention under the most severe test condition of 60 degrees C. In addition, the amount of oxygen evolution from the lattice in the cathode with two heterostructures is reduced by 70%, compared to the reference sample. All these results suggest that the bulk Li[Ni0.54Co0.12Mn0.34]O-2 consisting of two heterostructures satisfy the requirements for hybrid electric vehicles, power tools, and mobile electronics. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.subject Capacity retention ko
dc.subject Cathode materials ko
dc.subject Core-shell ko
dc.subject High energy ko
dc.subject High-power ko
dc.subject Layered phase ko
dc.subject Li-ion batteries ko
dc.subject Lithium-ion battery ko
dc.subject Mobile electronics ko
dc.subject Oxygen evolution ko
dc.subject Power tools ko
dc.subject Reversible capacity ko
dc.subject Spinel phase ko
dc.subject Test condition ko
dc.subject Violent reactions ko
dc.title Spinel-Layered Core-Shell Cathode Materials for Li-Ion Batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-81355160310 ko
dc.identifier.wosid 000295140100017 ko
dc.type.rims ART ko
dc.description.wostc 30 *
dc.description.scopustc 21 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-07-12 *
dc.identifier.doi 10.1002/aenm.201100239 ko
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