化工学报2016，Vol.67Issue(11)：4779-4786,8.DOI:10.11949/j.issn.0438-1157.20160651
利用表面改性制备磷酸锰锂/石墨烯锂离子电池复合材料
LiMnPO4/graphene nanocomposites with high electrochemical performance for lithium-ion batteries
摘要
Abstract
A high performance LiMnPO4/graphene nanocomposite as cathode material for lithium-ion batteries was preparedvia surface modification of 3-aminopropyltrimethoxysilane (APS) on LiMnPO4 nanoparticles and electrostatic self-assembly of positively charged APS-LiMnPO4 nanoparticles and negatively charged graphene oxide. Successful APS modification on LiMnPO4 was demonstrated by the existence of 3-aminopropyl and SiOC groups in FTIR spectra. LiMnPO4 nanoparticles (ca. 25 nm) were found uniformly distributed on the surface of graphene sheets. The intimate contact of LiMnPO4 nanoparticles with graphene conductive network allows achieving fast electron transfer between the active material and charge collector and accommodating volume expansion/contraction of LiMnPO4 nanoparticles during electric discharge/charge process. The nanocomposite cathode material could deliver an initial capacity of 142.2 mA·h·g−1 at 0.05 C and maintain 90.5% capacity after 50 cycles, which were significant better than no APS-modified counterpart.关键词
磷酸锰锂/3-氨丙基三甲氧硅烷改性/纳米材料/复合材料/电化学Key words
lithium manganese phosphate/aminopropyltrimethoxysilane modification/nanomaterials/composites/electrochemistry分类
化学化工引用本文复制引用
赵兵,王志轩,陈卢,杨雅晴,陈芳,高阳,蒋永..利用表面改性制备磷酸锰锂/石墨烯锂离子电池复合材料[J].化工学报,2016,67(11):4779-4786,8.基金项目
国家自然科学基金项目（21501119,11575105）；上海市科委技术标准项目（15DZ0501402）。@@@@Foundation item：supported by the National Natural Science Foundation of China (21501119,11575105) and the Science and Technology Committee of Shanghai (15DZ0501402) （21501119,11575105）
