Reduced graphene oxide coated Na4MnV (PO4) 3 rGO microspheres nanomaterial and preparation and application thereof

• Main Authors: MAI LIQIANG, ZHOU LIANG, CAI CONGCONG, HU PING
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention relates to a reduced graphene oxide coated microsphere nanometer material and a preparation method thereof. The material can be used as a nanometer positive electrode active material ofa sodium ion battery, and the diameter of the microsphere is 1 [mu]m-3[mu]m. The porous structure of Na4MnV (PO4) 3 isformed by irregular particles. The surface was coated with porous graphene network, and the surface area was 97.9 m2/g. The thickness of graphene coating was 2 nm-4nm. The invention has the advantages that: the invention adopts spray drying-calcination and that Na4MnV (PO4) 3 rGO microspheres are synthesized in liquid phase by adding reduced graphene oxide. As the anodematerial of sodium ion battery, this material exhibits high reversible capacity, good cycle stability andhigh rate performance. Secondly, the synthesis method is simple and the yield is high, which is conducive to market promotion. 本发明涉及还原氧化石墨烯包覆的微米球纳米材料及其制备方法，该材料可作为钠离子电池纳米正极活性材料，其微米球直径为1μm-3μm，内部是NaMnV(PO)不规则颗粒形成的多孔结构，表面被多孔石墨烯网络包覆，表