Full metadata record

DC FieldValueLanguage
dc.contributor.author선양국-
dc.date.accessioned2017-01-09T01:59:46Z-
dc.date.available2017-01-09T01:59:46Z-
dc.date.issued2015-05-
dc.identifier.citationNANO RESEARCH, v. 8, NO 5, Page. 1464-1479en_US
dc.identifier.issn1998-0124-
dc.identifier.issn1998-0000-
dc.identifier.urihttp://link.springer.com/article/10.1007/s12274-014-0631-8-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/24963-
dc.description.abstractThe Ni-rich Li[Ni0.6Co0.2Mn0.2]O-2 surface has been modified with H3PO4. After coating at 80 A degrees C, the products were heated further at a moderate temperature of 500 A degrees C in air, when the added H3PO4 transformed to Li3PO4 after reacting with residual LiOH and Li2CO3 on the surface. A thin and uniform smooth nanolayer (˂ 10 nm) was observed on the surface of Li[Ni0.6Co0.2Mn0.2]O-2 as confirmed by transmission electron microscopy (TEM). Time-of-flight secondary ion mass spectroscopic (ToF-SIMS) data exhibit the presence of LiP+, LiPO+, and Li2PO (2) (+) fragments, indicating the formation of the Li3PO4 coating layer on the surface of the Li[Ni0.6Co0.2Mn0.2]O-2. As a result, the amounts of residual lithium compounds, such as LiOH and Li2CO3, are significantly reduced. As a consequence, the Li3PO4-coated Li[Ni0.6Co0.2Mn0.2]O-2 exhibits noticeable improvement in capacity retention and rate capability due to the reduction of residual LiOH and Li2CO3. Further investigation of the extensively cycled electrodes by X-ray diffraction (XRD), TEM, and ToF-SIMS demonstrated that the Li3PO4 coating layers have multi-functions: Absorption of water in the electrolyte that lowers the HF level, HF scavenging, and protection of the active materials from deleterious side reactions with the electrolyte during extensive cycling, enabling high capacity retention over 1,000 cycles.en_US
dc.description.sponsorshipThis work was partially supported by the IT R&D program of MKE/KEIT (No. 10041856 Technology development for life improvement of high-Ni-composition cathodes at high temperatures (>= 60 degrees C)) and the secondary battery R&D program for leading green industry of MKE/KEIT (No. 10041094 Development of Co-free, high-thermal-stability, and eco-friendly layered cathode materials for lithium ion batteries).en_US
dc.language.isoenen_US
dc.publisherTSINGHUA UNIV PRESSen_US
dc.subjectLi3PO4en_US
dc.subjectcoatingen_US
dc.subjectpositive electrodeen_US
dc.subjectlithiumen_US
dc.subjectbatteriesen_US
dc.titleAn effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayeren_US
dc.typeArticleen_US
dc.relation.no5-
dc.relation.volume8-
dc.identifier.doi10.1007/s12274-014-0631-8-
dc.relation.page1464-1479-
dc.relation.journalNANO RESEARCH-
dc.contributor.googleauthorJo, Chang-Heum-
dc.contributor.googleauthorCho, Dae-Hyun-
dc.contributor.googleauthorNoh, Hyung-Joo-
dc.contributor.googleauthorYashiro, Hithshi-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorMyung, Seung Taek-
dc.relation.code2015011305-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE