一种聚阴离子基复合正极极片及其制备方法
By using sodium iron pyrophosphate and P2-type layered oxides combined with carbon nanotube graphene iron sodium sulfate in sodium-ion batteries, the polyanionic matrix is densified and a multi-level particle size distribution structure is constructed, which solves the problem of low compaction density of sodium-ion battery cathode materials and improves volumetric energy density.
CN122117794BActive Publication Date: 2026-07-17HUNAN NORMAL UNIVERSITY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN NORMAL UNIVERSITY
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
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Figure CN122117794B_ABST
Abstract
本发明属于钠离子电池技术领域，涉及一种聚阴离子基复合正极极片、其制备方法及钠离子电池。该极片由正极集流体及电极材料层组成，电极材料层含活性物质、导电剂与粘结剂。活性物质的质量百分比为：磷酸焦磷酸铁钠70%~90%、P2型层状氧化物5%~20%、含碳纳米管和石墨烯的硫酸铁钠5%~10%。制备时，先将磷酸焦磷酸铁钠与上述硫酸铁钠球磨混合，在惰性气氛下烧结；再与P2型层状氧化物球磨混匀并在真空气氛下加热干燥得到复合活性物质。随后将其与导电剂、粘结剂制浆，涂布于铝箔集流体表面，经干燥、辊压制成复合正极极片。本发明可提升正极极片压实密度与体积能量密度，改善倍率性能。所述钠离子电池包括上述复合正极极片。
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