发明名称 |
Positive electrode active material, sodium secondary battery, and production method of olivine-type phosphate |
摘要 |
Disclosed are a positive electrode active material and a method for producing an olivine-type phosphate. The positive electrode active material comprises an olivine-type phosphate represented by the following formula (I), wherein the maximum peak in an X-ray diffraction pattern obtained using a CuKα ray is the peak of the (031) plane of the olivine-type phosphate and the half-value width of the peak is 1.5° or less: AaMbPO4 (I), wherein A represents one or more elements selected from among alkali metals; M represents one or more elements selected from among transition metals; a is from 0.5 to 1.5; and b is from 0.5 to 1.5. The method for producing an olivine-type phosphate comprises preparing a raw material comprising element A, element M, and phosphorus (P) so that a A:M:P molar ratio may be a:b:1, preliminary calcining the raw material, and mainly calcining the preliminary calcined raw material. |
申请公布号 |
US8795894(B2) |
申请公布日期 |
2014.08.05 |
申请号 |
US200912864715 |
申请日期 |
2009.01.23 |
申请人 |
Sumitomo Chemical Company, Limited |
发明人 |
Sakai Maiko;Yamamoto Taketsugu;Makidera Masami;Kuze Satoru;Hattori Takeshi |
分类号 |
H01M4/52;C01B25/30 |
主分类号 |
H01M4/52 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A positive electrode active material comprising an olivine-type phosphate represented by the following formula (I), wherein the maximum peak of the positive electrode active material in an X-ray diffraction pattern obtained using a CuKα ray is the peak of the (031) plane of the olivine-type phosphate, and the half-value width of the peak is 1.5° or less:
AaMbPO4 (I) wherein A comprises sodium, M represents one or more elements selected from among transition metals, a is 1, and b is 1. |
地址 |
Tokyo JP |