摘要
由于具有工作电压高、工作范围宽、比能量大、无污染、使用寿命长等优点,锂离子电池具有广阔的应用前景。然而,目前商业化的锂离子电池仍无法满足电动汽车对电池低成本及高能量密度的要求。研发比能量更高、价格更低廉、寿命更长的锂离子电池成为电动汽车产业发展的关键。尖晶石结构的镍锰酸锂(LiNi0.5Mn1.5O4)具有三维扩散通道,有利于锂离子的传输,且结构稳定;其理论放电比容量可达147 mAh·g-1。更重要的是,其电压平台高达4.7 V,具有高的能量密度与功率密度,被认为是未来锂离子电池发展中最具前途与吸引力的正极材料之一。本文介绍了LiNi0.5Mn1.5O4的结构、制备方法、掺杂与包覆改性研究及其应用前景,着重介绍了材料的改性方法并指出LiNi0.5Mn1.5O4目前亟需解决的问题和研究重点。
Lithium ion batteries （LIBs） decades owing to their high operating have been considered as promising energy storage devices in the past voltage, large energy density and outstanding cycle performance However, the currently commercial LIBs could not fulfill the demand of electric vehicles（EV） or hybrid electric vehicles（HEV） applications. Thence, superior electrode materials possessing either higher capacity or higher voltage have gained enormous interest. Taking this into account, spinelLiNi0.5Mn1.5O4 which owns high operating voltage, relatively high theoretical capacity （147 mAh. g^-1） and three-dimensional lithium ion transport channels has become one of the most excellent cathode materials. In the presented paper, the structure and synthesis of this material are reviewed, and special emphases are shown to the current research activities onLiNi0.5Mn1.5O4 cathodes in ion doping along with surface coating synthesized by various synthetic techniques. Finally, the key issues and prospects of the cathode material are commented.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2014年第6期939-949,共11页
Progress in Chemistry
基金
国家重点基础研究发展计划(973)项目(No.2014CB239701)
国家自然科学基金项目(No.21173120
51372116)
江苏省自然科学基金项目(No.BK2011030)
中央高校基本科研业务费专项基金(No.NP2014403)资助~~
作者简介
Corresponding author e-mail：azhangxg@ 163. com
