Fabrication of Na0.7MnO2/C composite cathode material by simple heat treatment for high-power na-ion batteries

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dc.contributor.authorSohn, Dongrakko
dc.contributor.authorLim, Sung-Jinko
dc.contributor.authorNam, Do-Hwanko
dc.contributor.authorHong, Kyung-Sikko
dc.contributor.authorKim, TaeHeeko
dc.contributor.authorOh, Se-Kwonko
dc.contributor.authorEom, Ji-Yongko
dc.contributor.authorCho, Eun Aeko
dc.contributor.authorKwon, HyukSangko
dc.date.accessioned2018-01-30T02:39:50Z-
dc.date.available2018-01-30T02:39:50Z-
dc.date.created2017-12-18-
dc.date.created2017-12-18-
dc.date.issued2018-01-
dc.identifier.citationELECTRONIC MATERIALS LETTERS, v.14, no.1, pp.30 - 36-
dc.identifier.issn1738-8090-
dc.identifier.urihttp://hdl.handle.net/10203/238159-
dc.description.abstractA Na0.7MnO2/C composite cathode material is synthesized by simple and costeffective two-step heat treatment for an improvement in the rate capability of Na0.7MnO2. The first heat treatment is to synthesize Na0.7MnO2, and the second one is a low temperature annealing at 350 A degrees C for 1 h in air, which is necessary to suppress an interfacial reaction between the Na0.7MnO2 and C in the synthesis process of Na0.7MnO2/C composite. Structural analyses by XRD and XPS reveal that the Na0.7MnO2/C shows the same structural properties as that of the pristine Na0.7MnO2, and hence they exhibit the same initial discharge capacity of 175 mAh g(-1) at 20 mA g(-1). At a current density of 400 mA g(-1), the discharge capacity of Na0.7MnO2 reduces to 50 mAh g(-1) (28% of the initial discharge capacity), whereas that of Na0.7MnO2/C reduces to 108 mAh g(-1) (61% of the initial discharge capacity). The enhanced rate capability of the Na0.7MnO2/C is attributed to the conductive carbon layer formed on the surface of Na0.7MnO2 particles, enabling the facile transport of electrons from the current collector to the surface of the Na0.7MnO2 particles.-
dc.languageEnglish-
dc.publisherKOREAN INST METALS MATERIALS-
dc.subjectMANGANESE OXIDES-
dc.subjectELECTROCHEMICAL PERFORMANCE-
dc.subjectENERGY-STORAGE-
dc.subjectP2-TYPE-
dc.subjectELECTRODES-
dc.subjectMORPHOLOGY-
dc.subjectBEHAVIOR-
dc.titleFabrication of Na0.7MnO2/C composite cathode material by simple heat treatment for high-power na-ion batteries-
dc.typeArticle-
dc.identifier.wosid000417072400005-
dc.identifier.scopusid2-s2.0-85037375415-
dc.type.rimsART-
dc.citation.volume14-
dc.citation.issue1-
dc.citation.beginningpage30-
dc.citation.endingpage36-
dc.citation.publicationnameELECTRONIC MATERIALS LETTERS-
dc.identifier.doi10.1007/s13391-017-7085-6-
dc.contributor.localauthorCho, Eun Ae-
dc.contributor.localauthorKwon, HyukSang-
dc.contributor.nonIdAuthorEom, Ji-Yong-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorNa-ion batteries-
dc.subject.keywordAuthorcathode-
dc.subject.keywordAuthorNa0.7MnO2-
dc.subject.keywordAuthorcarbon composite-
dc.subject.keywordAuthorrate capability-
dc.subject.keywordPlusMANGANESE OXIDES-
dc.subject.keywordPlusELECTROCHEMICAL PERFORMANCE-
dc.subject.keywordPlusENERGY-STORAGE-
dc.subject.keywordPlusP2-TYPE-
dc.subject.keywordPlusELECTRODES-
dc.subject.keywordPlusMORPHOLOGY-
dc.subject.keywordPlusBEHAVIOR-
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