2022年11月15日 · The XRD patterns of the as-synthesized LVPF and LVPF-LVP sample are presented in Fig. S1. It can be seen that the main diffraction peaks of LVPF belong to a triclinic system with the space group of P 1 ¯, and can be indexed as the standard pattern of LiVPO 4 F (PDF No. 01–080-6321 from ICDD, 2016).

2014年4月1日 · XRD results reveal that the prepared composite are well crystallized with triclinic LiVPO4F. SEM and TEM images demonstrate that the LiVPO4F nanoparticles in the composite are well enwrapped by graphene. Used as anode material for lithium ion batteries, the prepared LVPF/G composite exhibits greatly improved electrochemical performance.

2022年3月1日 · In this paper, we report a novel method to construct LiVPO 4 F/C cathode with NH 4 F added in an one-step rapid reduction method, in which NH 4 F is reacted with the reactants to suppress the volatilization of fluorine and supplement volatilization loss of fluorine.

2016年11月5日 · In this work, we propose a two-step carbon coating method to synthesize the x LiVPO 4 F· y Li 3 V 2 (PO 4) 3 /C composite cathode material. It is found that the composite has good electrochemical performance by associating the superiority of …

2022年10月13日 · The XRD patterns of electrode after 10 cycles and 50 cycles are almost identical to that cycled for 1 cycle, and no characteristic peak of LVPF appears any more during the cycling, which...

2012年8月24日 · The prepared LiVPO 4 F/C sample is marked as LVPF and the Li 3 V 2 (PO4) 3 /C is marked as LVP. The powder X-ray diffraction (XRD, Rint-2000, Rigaku) using Cu K α radiation was employed to identify the crystalline phase of the synthesized samples. The morphology of the prepared powders was measured by …

Characteristic peaks of LVPF was labeled (squares indicate the peaks of Li3V2(PO4)3 impurity; spheres indicate the peaks of LiVOPO4 impurity).

LVPF-20C with 11.84% impurity Li 3 V 2 (PO 4) 3 /C possesses the optimum capacity at a high current density. The reason is that Li 3 V 2 (PO 4 ) 3 /C is a fast ion conductor and allows a fast transfer of lithium ions in the cathode.

为了解决LFP材料电压平台较低的问题，研究者们开发了包括LiMnPO4、LiVPO4等在内的多款高电压的橄榄石结构材料，电压可达4V以上，弥补了LFP材料能量密度较低的劣势。 虽然上述的高电压橄榄石结构材料在电压平台上具有明显的提升，但是仍然面临着电子电导率低（约10-11S/cm）和离子电导率低（约8x10-7S/cm）低的问题，为了解决这一问题，西安交通大学的Jiebing Wu（第一作者）和YoulongXu（通讯作者）通过对LiVPO4F材料进行K+、Zr4+双离子掺杂，显著提升 …

2019年3月25日 · LVPF-PV8 cathode delivers flat discharge plateau at 4.2 V (I). The length of discharge curves at 4.1 V, 3.7 V and 3.6 V belonging to Li 3 V 2 (PO 4) 3 /C are very short. The performance of LVPF-PV8 is superior to that of cathode prepared by using phenol-formaldehyde resin, glucose and sucrose.