磷酸钒钠正极材料的Zr^(4+)掺杂改性研究  

Modification of Sodium Vanadate Cathode by Zr^(4+) Doping

作　　者：吕士忠 李天龙 房睿 卢宝光 郑成志 赵磊 邓亮 王振波 LÜShizhong;LI Tianlong;FANG Rui;LU Baoguang;ZHENG Chengzhi;ZHAO Lei;DENG Liang;WANG Zhenbo(School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China;National Engineering Research Center of Urban Water Resources Co.,Ltd.,Harbin Institute of Technology,Harbin Heilongjiang 150090,China;Guangdong Yuehai Water Investment Co.,Ltd.,Shenzhen Guangdong 518021,China)

机构地区：[1]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学水资源国家工程研究中心有限公司,黑龙江哈尔滨150090 [3]广东粤海水务投资有限公司,广东深圳518021

出　　处：《石油化工高等学校学报》2024年第6期44-51,共8页Journal of Petrochemical Universities

基　　金：中国博士后科学基金项目(2024M754198);国家资助博士后研究人员计划项目(GZC20233448);黑龙江省博士后面上资助项目(LBH-Z23137)。

摘　　要：采用喷雾干燥法制备了Zr^(4+)掺杂的空心球状磷酸钒钠(Na_(3)V_(2)(PO_(4))_(3))正极材料,探讨了Zr^(4+)掺杂量(n(Zr^(4+))/n(Na_(3-x)V_(2-x)Zr_(x)(PO_(4))_(3)))对材料性能的影响;通过X射线衍射(XRD)、扫描电子显微镜(SEM)及原位XRD等手段分析了Zr^(4+)掺杂对材料结构及电化学性能的影响。结果表明,Zr^(4+)掺杂增强了材料的结构稳定性,有效抑制了循环过程中的结构坍塌和体积膨胀;当Zr^(4+)掺杂量为0.15时,Na_(2.85)V_(1.85)Zr_(0.15)(PO_(4))_(3)在15.0 C倍率下的放电比容量为76.5 mA·h/g,在10.0 C倍率下经过800次循环后容量保持率高达80.6%。Zr^(4+)‐doped hollow spherical Na_(3)V_(2)(PO_(4))_(3) cathode material was prepared by spray drying method,and the influence of different Zr^(4+)doping levels(molar ratio of Zr^(4+) to Na_(3-x)V_(2-x)Zr_(x)(PO_(4))_(3))on the material properties was investigated.Techniques such as X‐ray diffraction(XRD),scanning electron microscopy(SEM),and in‐situ XRD were used to analyze the effects of Zr^(4+) doping on the structure and electrochemical performance of the material.It can be observed that Zr^(4+) doping enhanced the structural stability of the material,effectively inhibiting structural collapse and volume expansion during cycling.When the Zr^(4+) doping level was 0.15,Na_(2.85)V_(1.85)Zr_(0.15)(PO_(4))_(3)(NVZP‐15)demonstrated a discharge specific capacity of 76.5 mA•h/g at 15.0 C,with a capacity retention of 80.6% after 800 cycles at 10.0 C.

关 键 词：钠离子电池 磷酸钒钠 电化学性能 Zr^(4+)掺杂量 喷雾干燥 

分 类 号：TQ152[化学工程—电化学工业]