CAJ | 학술논문

以葡萄糖为碳源，对LiH2PO4、MnCO3、FeC2O4与葡萄糖等反应物进行湿法球磨，随后在750℃温度下煅烧，通过固相反应实现对LiMnPO4的铁离子掺杂和碳包覆改性，得到锂离子电池正极材料LiMn1?xFexPO4/C(x=0、0.05、0.10、0.15、0.20)。利用 X 射线衍射(XRD)，扫描电镜(SEM)及电化学测试等手段研究铁离子掺杂量对磷酸锰锂的晶体结构、微观形貌与电性能的影响。结果表明，LiMn0.9Fe0.1PO4/C 结晶度良好，颗粒较均匀细小，具有较好的电化学性能，0.05C倍率下的首次放电比容量达到110(mA·h)/g，经过30次循环后，放电比容量约80(mA·h)/g。
이포도당위탄원，대LiH2PO4、MnCO3、FeC2O4여포도당등반응물진행습법구마，수후재750℃온도하단소，통과고상반응실현대LiMnPO4적철리자참잡화탄포복개성，득도리리자전지정겁재료LiMn1?xFexPO4/C(x=0、0.05、0.10、0.15、0.20)。이용 X 사선연사(XRD)，소묘전경(SEM)급전화학측시등수단연구철리자참잡량대린산맹리적정체결구、미관형모여전성능적영향。결과표명，LiMn0.9Fe0.1PO4/C 결정도량호，과립교균균세소，구유교호적전화학성능，0.05C배솔하적수차방전비용량체도110(mA·h)/g，경과30차순배후，방전비용량약80(mA·h)/g。
LiMn1?xFexPO4/C cathode materials for Li-ion battery were synthesized at 750℃ by solid-state reaction method combining with the addition of the glucose as the carbon source and wet ball-milling of reactants. The effects of the doping amount of iron ions on the crystal structure, surface morphology and electrochemical properties of products of LiMn1?xFexPO4/C (x=0, 0.05, 0.10, 0.15, 0.20) were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), electrochemical measurement, respectively. The results indicate that the LiMn0.9Fe0.1PO4/C has the best electrochemical performance, and the initial discharge capacity of the sample reaches approximately 110 (mA·h)/g at 0.05C, moreover the discharge capacity keeps still to 80 (mA·h)/gafter 30 cycles.