High power Nb-doped LiFePO4 Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties
High power Nb-doped LiFePO4 Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties
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DOI：
10.1016/j.jpowsour.2016.06.128
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发表时间：
2016-09-15
影响因子：
9.2
通讯作者：
Darr, Jawwad A.
中科院分区：
文献类型：
--
作者：
Johnson, Ian D.;Blagovidova, Ekaterina;Darr, Jawwad A.
使用中试规模的连续水热流合成工艺（每天6 kg的生产速率）合成相对于总过渡金属含量在0.01-2.00原子% Nb范围内的高功率、相纯Nb掺杂的LiFePO 4（LFP）纳米颗粒。EDS分析表明Nb均匀分布在整个结构中。在水热流动过程中加入果糖作为试剂，然后进行合成后热处理，在颗粒表面上提供连续的石墨碳涂层。电化学测试表明，循环性能随着掺杂剂浓度的增加而改善，最高达1.0原子% Nb，对于该点，在10 C（充电或放电6分钟）下获得110 mAh g（-1）的比容量。这对于基于高功率阴极LFP的材料是优异的结果，特别是当考虑在大型中试规模装置上进行合成时。(C)2016年6月，作者。由爱思唯尔公司出版
High power, phase-pure Nb-doped LiFePO4 (LFP) nanoparticles are synthesised using a pilot-scale continuous hydrothermal flow synthesis process (production rate of 6 kg per day) in the range 0.01-2.00 at% Nb with respect to total transition metal content. EDS analysis suggests that Nb is homogeneously distributed throughout the structure. The addition of fructose as a reagent in the hydrothermal flow process, followed by a post synthesis heat-treatment, affords a continuous graphitic carbon coating on the particle surfaces. Electrochemical testing reveals that cycling performance improves with increasing dopant concentration, up to a maximum of 1.0 at% Nb, for which point a specific capacity of 110 mAh g(-1) is obtained at 10 C (6 min for the charge or discharge). This is an excellent result for a high power cathode LFP based material, particularly when considering the synthesis was performed on a large pilot-scale apparatus. (C) 2016 The Authors. Published by Elsevier B.V.