矿冶工程
礦冶工程
광야공정
2014年
6期
123-127
,共5页
程磊%王志兴%贺振江%李新海%郭华军
程磊%王誌興%賀振江%李新海%郭華軍
정뢰%왕지흥%하진강%리신해%곽화군
锂离子电池%正极材料%0.5Li2 MnO3·0.5Li( Ni1/3 Co1/3 Mn1/3 ) O2%共沉淀%电化学性能%喷雾干燥
鋰離子電池%正極材料%0.5Li2 MnO3·0.5Li( Ni1/3 Co1/3 Mn1/3 ) O2%共沉澱%電化學性能%噴霧榦燥
리리자전지%정겁재료%0.5Li2 MnO3·0.5Li( Ni1/3 Co1/3 Mn1/3 ) O2%공침정%전화학성능%분무간조
lithium ion battery%cathode material%0. 5Li2 MnO3·0. 5Li ( Ni1/3 Co1/3 Mn1/3 ) O2%co-precipitation%electrochemical performance%spray drying
分别采用氢氧化物共沉淀、碳酸盐共沉淀、喷雾干燥的方法合成了层状α?NaFeO2结构的富锂正极材料0.5Li2 MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2,通过X射线衍射分析(XRD)、扫描电子显微镜(SEM)和电化学性能测试对不同合成方法所得的样品进行了表征。实验结果表明:氢氧化物共沉淀合成的前驱体所制备的正极材料0.5Li2MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2具有良好的电化学性能,0.05C倍率下首次放电容量可达247.1 mA·h/g,0.2C倍率条件下经过50次循环,容量保持率为98.7%。
分彆採用氫氧化物共沉澱、碳痠鹽共沉澱、噴霧榦燥的方法閤成瞭層狀α?NaFeO2結構的富鋰正極材料0.5Li2 MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2,通過X射線衍射分析(XRD)、掃描電子顯微鏡(SEM)和電化學性能測試對不同閤成方法所得的樣品進行瞭錶徵。實驗結果錶明:氫氧化物共沉澱閤成的前驅體所製備的正極材料0.5Li2MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2具有良好的電化學性能,0.05C倍率下首次放電容量可達247.1 mA·h/g,0.2C倍率條件下經過50次循環,容量保持率為98.7%。
분별채용경양화물공침정、탄산염공침정、분무간조적방법합성료층상α?NaFeO2결구적부리정겁재료0.5Li2 MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2,통과X사선연사분석(XRD)、소묘전자현미경(SEM)화전화학성능측시대불동합성방법소득적양품진행료표정。실험결과표명:경양화물공침정합성적전구체소제비적정겁재료0.5Li2MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2구유량호적전화학성능,0.05C배솔하수차방전용량가체247.1 mA·h/g,0.2C배솔조건하경과50차순배,용량보지솔위98.7%。
Layered Li?rich cathode material 0.5Li2 MnO3 ·0.5Li ( Ni1/3 Co1/3 Mn1/3 ) O2 withα?NaFeO2 structure has been prepared by hydroxide co?precipitation, carbonate co?precipitation and spray drying methods respectively. The samples obtained by three methods were characterized by X?ray diffraction, scanning electron microscope and electrochemical characteristics analyses. The results show that the cathode material 0.5Li2 MnO3 ·0.5Li( Ni1/3 Co1/3 Mn1/3 ) O2 synthesized by the hydroxide co?precipitation method presents excellent electrochemical performance, with the initial discharge capacity of 247.1 mA·h/g at 0.05C and the capacity retention of 98.7% after 50 cycles at 0.2C.