摘要
以MnCO3为Mn源,采用热爆工艺合成LiFePO4,研究不同添加量的MnCO3对LiFePO4性能的影响。结果表明,掺杂量x=0.05时LiFe0.95Mn0.05PO4衍射峰峰强和半高宽为最佳;SEM测试显示,掺杂产物的颗粒分散最好,颗粒均匀;掺杂产物在0.1 C倍率下的首次充放电比容量分别为154.9 mAh/g和138.5 mAh/g,较纯LiFePO4的首次充放电比容量有较大提高;在经过50次循环后放电比容量保持率为86.45%,在0.2 C、0.5 C和1 C倍率下的首次放电比容量分别为129 mAh/g、109.4 m Ah/g和86.9 mAh/g。
LiFePO4 was synthesized by thermal explosion with MnCO3 as Mn source.The effect of different amount of MnCO3 on the performance of LiFePO4 was studied.The results show that the peak intensity and half width of LiFe0.95Mn0.05PO4 diffraction peak are the best when the doping amount is x=0.05;SEM test shows that the particles of the doping product are dispersed best and the particles are uniform;the first charge discharge specific capacity of the doping product at 0.1 C is 154.9 m Ah/g and 138.5 mAh/g respectively,which is higher than the first charge discharge specific capacity of pure LiFePO4;after 50 cycles,the discharge specific capacity is greatly improved.The first discharge specific capacity is 129 m Ah/g,109.4 m Ah/g and 86.9 m Ah/g at 0.2 C,0.5 C and 1 C,respectively.
作者
李航
陈秀娟
张鹏林
LI Hang;CHEN Xiu-juan;ZHANG Peng-lin(Province-Ministry Funded State Key Lab on New Materials of Nonferrous Metals in Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China;School of Mechanical and Electronical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《粉末冶金工业》
CAS
北大核心
2020年第1期7-11,共5页
Powder Metallurgy Industry
基金
国家自然科学基金资助(51161012)
甘肃省重点研发项目(17YF1GA020).
