Synthesis method for preparing bismuth-doped lithium silicate positive electrode material by taking iron tailing as raw material

• Main Author: YUNHUA QU
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2018
• 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

The invention relates to a synthesis method for preparing a bismuth-doped lithium silicate positive electrode material by taking iron tailing as a raw material. The synthesis method comprises the steps of firstly, preparing a sodium silicate solution by taking the iron tailing as the raw material; secondly, adding ferrous nitrate into the sodium silicate solution to obtain a ferrous nitrate precipitant; thirdly, mixing lithium oxide and Fe2O3 with the precipitant; and finally, performing calcination and cooling to obtain a bismuth-doped lithium silicate sample. The lithium silicate system material is an important lithium battery positive electrode material, and the method has very important significance to integrated utilization of the iron tailing, environmental protection, and promotionon development of high and new technology. 本发明涉及种以铁尾矿为原料制备铋掺杂的硅酸亚铁锂正极材料的合成方法，首先以铁尾矿为原料制备硅酸钠溶液，然后向硅酸钠溶液中加入硝酸亚铁获得硅酸亚铁沉淀，再向沉淀物质中混入氧化锂和三氧化二铁，最后煅烧、冷却获得铋掺杂的硅酸亚铁锂样品。硅酸亚铁锂体系材料是种重要的锂电池正极材料，本方法对于铁尾矿的综合利用、环境保护、以及促进高新技术的发展都具有十分重要的意义。