CARBON-COATED Li5FeO4

• Main Authors: KIMIJIMA TAKEYUKI, EGUCHI TATSUYA, NIIMURA KAZUHIRO, IWATA KOJI, OKAWA YUKIHISA, MASE KOHEI, ABE TOMOKUNI, TAZAKI TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 06.06.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide LiFeOuseful as a positive electrode of a lithium ion secondary battery or other related materials or the like.SOLUTION: There is provided a carbon-coated LiFeOcontaining LiFeOand a carbon film for coating the surface of the LiFeO, wherein the mass% (Wc) of the carbon satisfies the expression, 1≤Wc≤6, an excellent conductivity is led and a sufficient capacity is exhibited as a positive electrode by coating with the carbon film. There are provided a positive electrode containing the carbon-coated LiFeOand a lithium ion secondary battery having the positive electrode.SELECTED DRAWING: Figure 1 【課題】リチウムイオン二次電池の正極材料やその他の関連材料などとして有用なＬｉ５ＦｅＯ４を提供。【解決手段】Ｌｉ５ＦｅＯ４と前記Ｌｉ５ＦｅＯ４の表面を被覆する炭素膜とを含有する炭素被覆Ｌｉ５ＦｅＯ４であって、前記炭素の質量％（Ｗｃ）が１≦Ｗｃ≦６である炭素被覆Ｌｉ５ＦｅＯ４であり、この炭素膜による被覆によって優れた導電性が導かれるとともに、正極材料として十分な容量を発現することができる炭素被覆Ｌｉ５ＦｅＯ４。前記炭素被覆Ｌｉ５ＦｅＯ４を含有する正極であり、前記正極を有するリチウムイオン二次電池。【選択図】図１