摘要
橄榄石结构的LiFePO4以其高比容量、低成本、环境友好、热稳定性良好等优点而成为一类最具发展前景的锂离子电池正极材料,但电导率和离子扩散率低是制约其在动力电池领域广泛应用的主要障碍。从材料制备和改性等方面综述了近年来国内外利用液相法合成LiFePO4以及掺杂改性的研究状况,比较了水热法、共沉淀法、溶胶-凝胶法及掺杂对材料性能的影响,认为合成材料的形貌和粒径以及导电剂或少量金属离子的掺杂是提高LiFe-PO4电导率的有效方法,指出今后的重点方向是合成工艺的改进和理论的继续深入研究。
The olivine LiFePO4 is viewed widely as the most promising cathode material for lithium ion battery due to its high specific capacity, lower cost, environmental benignancy,good thermal stability, etc. Exploring new synthesis methods which can reduce energy consumption and cost, and improve electrochemical performance of LiFePO4 through modification have become research hotspots nowadays. Compared with solid-state synthetic methods, wetchemical approaches have attracted more and more attention because of their simple procedure, low consumption, small particle size of product, and uniform particle size distribution. In this paper, the researches of recent years for the synthesis of LiFePO4 are reviewed systematically; furthermore, the modification by addition conductive materials and metal ions doping is also introduced.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第7期34-39,共6页
Materials Reports
基金
国家自然科学基金资助项目(20876062)
关键词
磷酸铁锂(LiFePO4)
液相合成
电化学性能
改性
lithium iron phosphate, wet-chemical synthesis, electrochemical performance, modification
