CARBON-COATED COMPOSITE MATERIALS AND THEIR USES
To provide a lithium-ion secondary battery having excellent first-time discharge capacity, first-time coulombic efficiency, and cycle characteristics by using a carbon-coated composite material in which silicon degradation is suppressed by the formation of a thin, uniform carbon coating layer on the...
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| creator | ITO YUJI FUJITA MASATO BACK JIN SOK FUKUI TATSUO |
| description | To provide a lithium-ion secondary battery having excellent first-time discharge capacity, first-time coulombic efficiency, and cycle characteristics by using a carbon-coated composite material in which silicon degradation is suppressed by the formation of a thin, uniform carbon coating layer on the surface of the composite material.SOLUTION: A carbon-coated composite material (C) comprising a composite material (A) containing a carbon material and silicon, the surface of the composite material being covered with a carbonaceous coating layer (B), wherein, in the Raman spectrum of carbon-coated composites (C) by micro-Raman spectroscopy, the coefficient of variation of an R-value (the ratio (ID/IG) of peak intensity (ID) near 1350 cm-1 to peak intensity (IG) near 1580 cm-1) is 0.60 or less, and the coefficient of variation of the ratio (ISi/IG) of peak intensity (ISi) to IG at 450 to 495 cm-1 is 1.0 or less.SELECTED DRAWING: Figure 1
【課題】 複合材料の表面に薄く、均一な炭素性被覆層が形成されることでシリコンの劣化が抑制された炭素被覆複合材料によって、初回放電容量、初回クーロン効率、サイクル特性の優れたリチウムイオン二次電池を提供することができる。【解決手段】 炭素材料およびシリコンを含む複合材料（Ａ）の表面が、炭素性被覆層（Ｂ）によって被覆された炭素被覆複合材料（Ｃ）であって、顕微ラマン分光分析法による炭素被覆複合材料（Ｃ）のラマンスペクトルにおいて、Ｒ値（１３５０ｃｍ-1付近のピーク強度（ＩD）と１５８０ｃｍ-1付近のピーク強度（ＩG）の比（ＩD／ＩG））の変動係数が０．６０以下であり、４５０〜４９５ｃｍ-1のピーク強度（ＩSi）とＩGの比（ＩSi／ＩG）の変動係数が１．０以下である炭素被覆複合材料。【選択図】図１ |
| format | Patent |
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【課題】 複合材料の表面に薄く、均一な炭素性被覆層が形成されることでシリコンの劣化が抑制された炭素被覆複合材料によって、初回放電容量、初回クーロン効率、サイクル特性の優れたリチウムイオン二次電池を提供することができる。【解決手段】 炭素材料およびシリコンを含む複合材料（Ａ）の表面が、炭素性被覆層（Ｂ）によって被覆された炭素被覆複合材料（Ｃ）であって、顕微ラマン分光分析法による炭素被覆複合材料（Ｃ）のラマンスペクトルにおいて、Ｒ値（１３５０ｃｍ-1付近のピーク強度（ＩD）と１５８０ｃｍ-1付近のピーク強度（ＩG）の比（ＩD／ＩG））の変動係数が０．６０以下であり、４５０〜４９５ｃｍ-1のピーク強度（ＩSi）とＩGの比（ＩSi／ＩG）の変動係数が１．０以下である炭素被覆複合材料。【選択図】図１</description><language>eng ; jpn</language><subject>BASIC ELECTRIC ELEMENTS ; CHEMISTRY ; COMPOUNDS THEREOF ; ELECTRICITY ; INORGANIC CHEMISTRY ; METALLURGY ; NON-METALLIC ELEMENTS ; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20211213&DB=EPODOC&CC=JP&NR=2021187708A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20211213&DB=EPODOC&CC=JP&NR=2021187708A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ITO YUJI</creatorcontrib><creatorcontrib>FUJITA MASATO</creatorcontrib><creatorcontrib>BACK JIN SOK</creatorcontrib><creatorcontrib>FUKUI TATSUO</creatorcontrib><title>CARBON-COATED COMPOSITE MATERIALS AND THEIR USES</title><description>To provide a lithium-ion secondary battery having excellent first-time discharge capacity, first-time coulombic efficiency, and cycle characteristics by using a carbon-coated composite material in which silicon degradation is suppressed by the formation of a thin, uniform carbon coating layer on the surface of the composite material.SOLUTION: A carbon-coated composite material (C) comprising a composite material (A) containing a carbon material and silicon, the surface of the composite material being covered with a carbonaceous coating layer (B), wherein, in the Raman spectrum of carbon-coated composites (C) by micro-Raman spectroscopy, the coefficient of variation of an R-value (the ratio (ID/IG) of peak intensity (ID) near 1350 cm-1 to peak intensity (IG) near 1580 cm-1) is 0.60 or less, and the coefficient of variation of the ratio (ISi/IG) of peak intensity (ISi) to IG at 450 to 495 cm-1 is 1.0 or less.SELECTED DRAWING: Figure 1
【課題】 複合材料の表面に薄く、均一な炭素性被覆層が形成されることでシリコンの劣化が抑制された炭素被覆複合材料によって、初回放電容量、初回クーロン効率、サイクル特性の優れたリチウムイオン二次電池を提供することができる。【解決手段】 炭素材料およびシリコンを含む複合材料（Ａ）の表面が、炭素性被覆層（Ｂ）によって被覆された炭素被覆複合材料（Ｃ）であって、顕微ラマン分光分析法による炭素被覆複合材料（Ｃ）のラマンスペクトルにおいて、Ｒ値（１３５０ｃｍ-1付近のピーク強度（ＩD）と１５８０ｃｍ-1付近のピーク強度（ＩG）の比（ＩD／ＩG））の変動係数が０．６０以下であり、４５０〜４９５ｃｍ-1のピーク強度（ＩSi）とＩGの比（ＩSi／ＩG）の変動係数が１．０以下である炭素被覆複合材料。【選択図】図１</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CHEMISTRY</subject><subject>COMPOUNDS THEREOF</subject><subject>ELECTRICITY</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2021</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBwdgxy8vfTdfZ3DHF1UXD29w3wD_YMcVXwBfKDPB19ghUc_VwUQjxcPYMUQoNdg3kYWNMSc4pTeaE0N4OSm2uIs4duakF-fGpxQWJyal5qSbxXgJGBkaGhhbm5gYWjMVGKAG7cJqk</recordid><startdate>20211213</startdate><enddate>20211213</enddate><creator>ITO YUJI</creator><creator>FUJITA MASATO</creator><creator>BACK JIN SOK</creator><creator>FUKUI TATSUO</creator><scope>EVB</scope></search><sort><creationdate>20211213</creationdate><title>CARBON-COATED COMPOSITE MATERIALS AND THEIR USES</title><author>ITO YUJI ; FUJITA MASATO ; BACK JIN SOK ; FUKUI TATSUO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2021187708A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2021</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CHEMISTRY</topic><topic>COMPOUNDS THEREOF</topic><topic>ELECTRICITY</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY</topic><toplevel>online_resources</toplevel><creatorcontrib>ITO YUJI</creatorcontrib><creatorcontrib>FUJITA MASATO</creatorcontrib><creatorcontrib>BACK JIN SOK</creatorcontrib><creatorcontrib>FUKUI TATSUO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ITO YUJI</au><au>FUJITA MASATO</au><au>BACK JIN SOK</au><au>FUKUI TATSUO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>CARBON-COATED COMPOSITE MATERIALS AND THEIR USES</title><date>2021-12-13</date><risdate>2021</risdate><abstract>To provide a lithium-ion secondary battery having excellent first-time discharge capacity, first-time coulombic efficiency, and cycle characteristics by using a carbon-coated composite material in which silicon degradation is suppressed by the formation of a thin, uniform carbon coating layer on the surface of the composite material.SOLUTION: A carbon-coated composite material (C) comprising a composite material (A) containing a carbon material and silicon, the surface of the composite material being covered with a carbonaceous coating layer (B), wherein, in the Raman spectrum of carbon-coated composites (C) by micro-Raman spectroscopy, the coefficient of variation of an R-value (the ratio (ID/IG) of peak intensity (ID) near 1350 cm-1 to peak intensity (IG) near 1580 cm-1) is 0.60 or less, and the coefficient of variation of the ratio (ISi/IG) of peak intensity (ISi) to IG at 450 to 495 cm-1 is 1.0 or less.SELECTED DRAWING: Figure 1
【課題】 複合材料の表面に薄く、均一な炭素性被覆層が形成されることでシリコンの劣化が抑制された炭素被覆複合材料によって、初回放電容量、初回クーロン効率、サイクル特性の優れたリチウムイオン二次電池を提供することができる。【解決手段】 炭素材料およびシリコンを含む複合材料（Ａ）の表面が、炭素性被覆層（Ｂ）によって被覆された炭素被覆複合材料（Ｃ）であって、顕微ラマン分光分析法による炭素被覆複合材料（Ｃ）のラマンスペクトルにおいて、Ｒ値（１３５０ｃｍ-1付近のピーク強度（ＩD）と１５８０ｃｍ-1付近のピーク強度（ＩG）の比（ＩD／ＩG））の変動係数が０．６０以下であり、４５０〜４９５ｃｍ-1のピーク強度（ＩSi）とＩGの比（ＩSi／ＩG）の変動係数が１．０以下である炭素被覆複合材料。【選択図】図１</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY |
| title | CARBON-COATED COMPOSITE MATERIALS AND THEIR USES |
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