Xiao Kuikui, Chen Xiaohua, Deng Weina, Tang Qunli, Hu Aiping, Zhang Lei, Liu Zheng, Li Zhe
J Nanosci Nanotechnol. 2017 Jan;17(1):341-7. doi: 10.1166/jnn.2017.12440.
LiFePO₄ (LFP) microparticles coated homogeneously with three-dimensional (3D) carbon nanotube (CNT) conductive networks were successfully prepared via a simple and effective ball milling method by controlling Polyvinylidene fluoride (PVDF) content in cathode electrode slurry. Scanning electron microscopy (SEM) demonstrated that the electrical bridge between the LFP could be well modulated by varying the amount of the CNTs and PVDF. The LFP/CNTs composite with 3 wt% CNTs and 5 wt% PVDF, in which CNTs are embedded in the microspheres homogeneously, possesses the best 3D CNT conductive networks and exhibits the best electrochemical property with high capacity retention of 95.72% at 0.25 C after 50 cycles. Essentially, in comparison with those samples without CNT networks, this CNT network structure can greatly enhance the electrical conductivity, thus markedly improving the electrochemical performance. (LFP) microparticles coated homogeneously with three-dimensional (3D) carbon nanotube (CNT) conductive networks were successfully prepared via a simple and effective ball milling method by controlling Polyvinylidene fluoride (PVDF) content in cathode electrode slurry. Scanning electron microscopy (SEM) demonstrated that the electrical bridge between the LFP could be well modulated by varying the amount of the CNTs and PVDF. The LFP/CNTs composite with 3 wt% CNTs and 5 wt% PVDF, in which CNTs are embedded in the microspheres homogeneously, possesses the best 3D CNT conductive networks and exhibits the best electrochemical property with high capacity retention of 95.72% at 0.25 C after 50 cycles. Essentially, in comparison with those samples without CNT networks, this CNT network structure can greatly enhance the electrical conductivity, thus markedly improving the electrochemical performance.
通过控制阴极电极浆料中的聚偏二氟乙烯（PVDF）含量，采用简单有效的球磨法成功制备了均匀包覆三维（3D）碳纳米管（CNT）导电网络的磷酸铁锂（LFP）微粒。扫描电子显微镜（SEM）表明，通过改变CNT和PVDF的用量，可以很好地调节LFP之间的电桥。含有3 wt% CNT和5 wt% PVDF的LFP/CNT复合材料，其中CNT均匀地嵌入微球中，具有最佳的3D CNT导电网络，并表现出最佳的电化学性能，在0.25 C下循环50次后容量保持率高达95.72%。从本质上讲，与那些没有CNT网络的样品相比，这种CNT网络结构可以大大提高电导率，从而显著改善电化学性能。通过控制阴极电极浆料中的聚偏二氟乙烯（PVDF）含量，采用简单有效的球磨法成功制备了均匀包覆三维（3D）碳纳米管（CNT）导电网络的磷酸铁锂（LFP）微粒。扫描电子显微镜（SEM）表明，通过改变CNT和PVDF的用量，可以很好地调节LFP之间的电桥。含有3 wt% CNT和5 wt% PVDF的LFP/CNT复合材料，其中CNT均匀地嵌入微球中，具有最佳的3D CNT导电网络，并表现出最佳的电化学性能，在0.25 C下循环50次后容量保持率高达95.72%。从本质上讲，与那些没有CNT网络的样品相比，这种CNT网络结构可以大大提高电导率，从而显著改善电化学性能。
