Cr₈O₂₁具有较高的理论比容量(642mAh/g)和工作电压(3.0V vs Li⁺/Li)等诸多优点,成为高比能量一次锂电池正极材料的研究热点,但目前尚未有可靠的大规模批量制备技术。鉴于此,以CrO₃为原料,将原料从2g逐步增加到300g制备Cr₈O₂₁电极材料,并研究其微观形貌、结构、元素组成及放电性能。结果表明,当原料增加到200g时,其放电性能略有降低,在1.0C放电时的放电比容量和放电能量密度分别高达270.1mAh/g和733.4Wh/kg。当原料增加到250g和300g时,开始有杂质相Cr₂O₅生成,放电比容量分别降到172.50mAh/g和81.45mAh/g。

Cr₈O₂₁ has many advantages such as high theoretical specific capacity (642mAh/g) and operating voltage (3.0V vs Li⁺/Li),thus making it a hotspot for the cathode material of high specific energy primary lithium batteries.However,there hasn't been reliably preparation technology in large-scale yet.Therefore,in this paper,CrO₈ was used as the material to prepare Cr₈O₂₁ electrode material by gradually increasing the batch size from 2g to 300g,and its micro-morphology,structure,elemental composition and lithium storage properties were investigated.The results showed that its discharge performance slightly decreased when the raw material quantity was increased to 200g,but the discharge specific capacity and discharge energy density at a 1.0C discharge rate were as high as 270.1mAh/g and 733.4Wh/kg,respectively.When the raw material quantity was augmented to 250g and 300g,Cr₂O₅ impurity phase began to form,and the specific discharge capacity decreased to 172.50mAh/g and 81.45mAh/g,respectively.